./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b 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_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4018a1168c08743b2a9b9283b6137e1dcc53bdf8ab8362348f4bbe02762305c3 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 10:31:16,519 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:31:16,521 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:31:16,540 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:31:16,540 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:31:16,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:31:16,556 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:31:16,558 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:31:16,560 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:31:16,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:31:16,568 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:31:16,569 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:31:16,569 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:31:16,570 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:31:16,571 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:31:16,572 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:31:16,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:31:16,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:31:16,576 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:31:16,578 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:31:16,583 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:31:16,584 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:31:16,585 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:31:16,586 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:31:16,590 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:31:16,590 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:31:16,591 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:31:16,592 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:31:16,592 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:31:16,593 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:31:16,594 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:31:16,595 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:31:16,595 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:31:16,596 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:31:16,597 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:31:16,598 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:31:16,598 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:31:16,599 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:31:16,599 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:31:16,600 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:31:16,601 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:31:16,602 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-20 10:31:16,622 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:31:16,623 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:31:16,623 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:31:16,623 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:31:16,624 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:31:16,625 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:31:16,625 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:31:16,626 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:31:16,626 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:31:16,626 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:31:16,626 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:31:16,626 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 10:31:16,627 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:31:16,627 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:31:16,627 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:31:16,627 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 10:31:16,627 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 10:31:16,627 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 10:31:16,628 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:31:16,628 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 10:31:16,628 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:31:16,628 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:31:16,628 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:31:16,628 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:31:16,629 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:31:16,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:31:16,629 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:31:16,629 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:31:16,629 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:31:16,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:31:16,630 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_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4018a1168c08743b2a9b9283b6137e1dcc53bdf8ab8362348f4bbe02762305c3 [2022-11-20 10:31:16,908 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:31:16,930 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:31:16,933 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:31:16,935 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:31:16,935 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:31:16,937 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2022-11-20 10:31:20,039 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:31:20,240 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:31:20,241 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2022-11-20 10:31:20,249 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/data/6a0311c51/1b922a40bce444e2b47499f09d37bee2/FLAGf422df0ec [2022-11-20 10:31:20,627 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/data/6a0311c51/1b922a40bce444e2b47499f09d37bee2 [2022-11-20 10:31:20,633 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:31:20,635 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:31:20,636 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:31:20,636 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:31:20,657 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:31:20,658 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:31:20" (1/1) ... [2022-11-20 10:31:20,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21c5a03b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:20, skipping insertion in model container [2022-11-20 10:31:20,659 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:31:20" (1/1) ... [2022-11-20 10:31:20,667 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:31:20,731 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:31:20,913 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c[2525,2538] [2022-11-20 10:31:20,925 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:31:20,937 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-20 10:31:20,938 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1a57a74c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:20, skipping insertion in model container [2022-11-20 10:31:20,938 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:31:20,939 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-20 10:31:20,941 INFO L158 Benchmark]: Toolchain (without parser) took 305.22ms. Allocated memory is still 165.7MB. Free memory was 138.6MB in the beginning and 128.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 10:31:20,942 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 125.8MB. Free memory is still 93.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 10:31:20,942 INFO L158 Benchmark]: CACSL2BoogieTranslator took 302.77ms. Allocated memory is still 165.7MB. Free memory was 138.6MB in the beginning and 128.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 10:31:20,944 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 125.8MB. Free memory is still 93.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 302.77ms. Allocated memory is still 165.7MB. Free memory was 138.6MB in the beginning and 128.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 104]: 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_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4018a1168c08743b2a9b9283b6137e1dcc53bdf8ab8362348f4bbe02762305c3 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 10:31:23,225 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:31:23,227 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:31:23,259 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:31:23,260 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:31:23,261 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:31:23,262 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:31:23,264 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:31:23,266 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:31:23,271 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:31:23,272 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:31:23,279 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:31:23,280 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:31:23,285 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:31:23,289 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:31:23,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:31:23,295 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:31:23,296 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:31:23,297 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:31:23,299 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:31:23,300 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:31:23,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:31:23,310 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:31:23,311 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:31:23,314 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:31:23,314 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:31:23,314 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:31:23,315 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:31:23,316 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:31:23,317 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:31:23,317 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:31:23,318 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:31:23,319 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:31:23,326 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:31:23,327 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:31:23,327 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:31:23,328 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:31:23,328 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:31:23,329 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:31:23,330 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:31:23,330 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:31:23,331 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-20 10:31:23,356 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:31:23,356 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:31:23,357 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:31:23,357 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:31:23,358 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:31:23,358 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:31:23,359 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:31:23,359 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:31:23,359 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:31:23,359 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:31:23,359 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:31:23,360 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 10:31:23,360 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:31:23,360 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:31:23,360 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:31:23,360 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 10:31:23,360 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 10:31:23,361 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 10:31:23,361 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:31:23,361 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 10:31:23,361 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 10:31:23,361 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 10:31:23,361 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:31:23,362 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:31:23,362 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:31:23,362 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:31:23,362 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:31:23,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:31:23,363 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:31:23,363 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:31:23,363 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-20 10:31:23,363 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 10:31:23,363 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 10:31:23,363 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_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4018a1168c08743b2a9b9283b6137e1dcc53bdf8ab8362348f4bbe02762305c3 [2022-11-20 10:31:23,766 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:31:23,787 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:31:23,790 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:31:23,791 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:31:23,792 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:31:23,794 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2022-11-20 10:31:26,960 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:31:27,227 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:31:27,227 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2022-11-20 10:31:27,234 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/data/0beebfd17/ebaf4672c25044bc9d71dda79183a071/FLAGeb7ba32fa [2022-11-20 10:31:27,253 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/data/0beebfd17/ebaf4672c25044bc9d71dda79183a071 [2022-11-20 10:31:27,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:31:27,258 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:31:27,259 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:31:27,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:31:27,263 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:31:27,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:31:27" (1/1) ... [2022-11-20 10:31:27,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@705e4fe8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:27, skipping insertion in model container [2022-11-20 10:31:27,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:31:27" (1/1) ... [2022-11-20 10:31:27,272 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:31:27,291 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:31:27,467 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c[2525,2538] [2022-11-20 10:31:27,487 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:31:27,501 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-20 10:31:27,506 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:31:27,519 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c[2525,2538] [2022-11-20 10:31:27,525 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:31:27,543 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:31:27,587 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c[2525,2538] [2022-11-20 10:31:27,597 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:31:27,668 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:31:27,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:27 WrapperNode [2022-11-20 10:31:27,669 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:31:27,670 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:31:27,671 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:31:27,671 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:31:27,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:27" (1/1) ... [2022-11-20 10:31:27,708 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:27" (1/1) ... [2022-11-20 10:31:27,736 INFO L138 Inliner]: procedures = 27, calls = 45, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 185 [2022-11-20 10:31:27,736 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:31:27,737 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:31:27,737 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:31:27,737 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:31:27,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:27" (1/1) ... [2022-11-20 10:31:27,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:27" (1/1) ... [2022-11-20 10:31:27,752 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:27" (1/1) ... [2022-11-20 10:31:27,752 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:27" (1/1) ... [2022-11-20 10:31:27,761 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:27" (1/1) ... [2022-11-20 10:31:27,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:27" (1/1) ... [2022-11-20 10:31:27,768 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:27" (1/1) ... [2022-11-20 10:31:27,770 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:27" (1/1) ... [2022-11-20 10:31:27,773 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:31:27,774 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:31:27,774 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:31:27,775 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:31:27,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:27" (1/1) ... [2022-11-20 10:31:27,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:31:27,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:31:27,809 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:31:27,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:31:27,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:31:27,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-20 10:31:27,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 10:31:27,856 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-20 10:31:27,856 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 10:31:27,856 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 10:31:27,857 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 10:31:27,857 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 10:31:27,857 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-20 10:31:27,857 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-20 10:31:27,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 10:31:27,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 10:31:27,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 10:31:27,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:31:27,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:31:27,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 10:31:27,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-20 10:31:27,860 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 10:31:27,979 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:31:27,981 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:31:28,636 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:31:28,915 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:31:28,915 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-20 10:31:28,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:31:28 BoogieIcfgContainer [2022-11-20 10:31:28,918 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:31:28,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:31:28,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:31:28,926 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:31:28,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:31:27" (1/3) ... [2022-11-20 10:31:28,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68b6d3f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:31:28, skipping insertion in model container [2022-11-20 10:31:28,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:31:27" (2/3) ... [2022-11-20 10:31:28,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68b6d3f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:31:28, skipping insertion in model container [2022-11-20 10:31:28,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:31:28" (3/3) ... [2022-11-20 10:31:28,932 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt2.wvr.c [2022-11-20 10:31:28,955 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:31:28,955 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2022-11-20 10:31:28,956 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 10:31:29,067 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-20 10:31:29,122 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 10:31:29,147 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 172 places, 174 transitions, 372 flow [2022-11-20 10:31:29,152 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 172 places, 174 transitions, 372 flow [2022-11-20 10:31:29,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 174 transitions, 372 flow [2022-11-20 10:31:29,264 INFO L130 PetriNetUnfolder]: 12/171 cut-off events. [2022-11-20 10:31:29,264 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-20 10:31:29,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 171 events. 12/171 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 172 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 122. Up to 2 conditions per place. [2022-11-20 10:31:29,276 INFO L119 LiptonReduction]: Number of co-enabled transitions 2160 [2022-11-20 10:32:02,333 INFO L134 LiptonReduction]: Checked pairs total: 3015 [2022-11-20 10:32:02,334 INFO L136 LiptonReduction]: Total number of compositions: 179 [2022-11-20 10:32:02,346 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 55 places, 49 transitions, 122 flow [2022-11-20 10:32:02,441 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 750 states, 616 states have (on average 4.165584415584416) internal successors, (2566), 749 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:02,467 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:32:02,477 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;@73cab78a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:32:02,477 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2022-11-20 10:32:02,482 INFO L276 IsEmpty]: Start isEmpty. Operand has 750 states, 616 states have (on average 4.165584415584416) internal successors, (2566), 749 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:02,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 10:32:02,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:02,486 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 10:32:02,486 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:02,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:02,491 INFO L85 PathProgramCache]: Analyzing trace with hash 27028, now seen corresponding path program 1 times [2022-11-20 10:32:02,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:02,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1119719919] [2022-11-20 10:32:02,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:02,504 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:02,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:02,509 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:02,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-20 10:32:02,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:02,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 10:32:02,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:02,883 INFO L321 Elim1Store]: treesize reduction 111, result has 19.0 percent of original size [2022-11-20 10:32:02,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 51 [2022-11-20 10:32:02,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:02,947 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:02,948 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:02,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1119719919] [2022-11-20 10:32:02,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1119719919] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:02,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:02,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:32:02,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663773195] [2022-11-20 10:32:02,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:02,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:32:02,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:02,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:32:02,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:32:02,982 INFO L87 Difference]: Start difference. First operand has 750 states, 616 states have (on average 4.165584415584416) internal successors, (2566), 749 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:03,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:03,206 INFO L93 Difference]: Finished difference Result 750 states and 2570 transitions. [2022-11-20 10:32:03,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:32:03,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-20 10:32:03,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:03,228 INFO L225 Difference]: With dead ends: 750 [2022-11-20 10:32:03,228 INFO L226 Difference]: Without dead ends: 750 [2022-11-20 10:32:03,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:32:03,233 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:03,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2022-11-20 10:32:03,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2022-11-20 10:32:03,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 750. [2022-11-20 10:32:03,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 617 states have (on average 4.165316045380875) internal successors, (2570), 749 states have internal predecessors, (2570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:03,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2570 transitions. [2022-11-20 10:32:03,330 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2570 transitions. Word has length 2 [2022-11-20 10:32:03,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:03,332 INFO L495 AbstractCegarLoop]: Abstraction has 750 states and 2570 transitions. [2022-11-20 10:32:03,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:03,332 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2570 transitions. [2022-11-20 10:32:03,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 10:32:03,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:03,333 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 10:32:03,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:03,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:03,545 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:03,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:03,546 INFO L85 PathProgramCache]: Analyzing trace with hash 27030, now seen corresponding path program 1 times [2022-11-20 10:32:03,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:03,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1898338588] [2022-11-20 10:32:03,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:03,547 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:03,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:03,548 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:03,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-20 10:32:03,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:03,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 10:32:03,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:03,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:32:03,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:32:03,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:32:03,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:32:03,883 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-20 10:32:03,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-11-20 10:32:03,940 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-20 10:32:03,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-20 10:32:03,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:03,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:03,988 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:03,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1898338588] [2022-11-20 10:32:03,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1898338588] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:03,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:03,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:32:03,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345887508] [2022-11-20 10:32:03,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:03,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:32:03,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:03,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:32:03,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:32:03,992 INFO L87 Difference]: Start difference. First operand 750 states and 2570 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:04,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:04,179 INFO L93 Difference]: Finished difference Result 750 states and 2569 transitions. [2022-11-20 10:32:04,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:32:04,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-20 10:32:04,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:04,186 INFO L225 Difference]: With dead ends: 750 [2022-11-20 10:32:04,186 INFO L226 Difference]: Without dead ends: 750 [2022-11-20 10:32:04,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:32:04,188 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:04,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2022-11-20 10:32:04,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2022-11-20 10:32:04,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 750. [2022-11-20 10:32:04,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 617 states have (on average 4.163695299837926) internal successors, (2569), 749 states have internal predecessors, (2569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:04,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2569 transitions. [2022-11-20 10:32:04,224 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2569 transitions. Word has length 2 [2022-11-20 10:32:04,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:04,225 INFO L495 AbstractCegarLoop]: Abstraction has 750 states and 2569 transitions. [2022-11-20 10:32:04,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:04,225 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2569 transitions. [2022-11-20 10:32:04,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 10:32:04,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:04,226 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 10:32:04,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:04,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:04,438 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:04,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:04,438 INFO L85 PathProgramCache]: Analyzing trace with hash 26871, now seen corresponding path program 1 times [2022-11-20 10:32:04,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:04,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [713206014] [2022-11-20 10:32:04,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:04,439 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:04,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:04,441 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:04,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-20 10:32:04,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:04,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 10:32:04,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:04,669 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 10:32:04,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 10:32:04,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:04,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:04,697 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:04,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [713206014] [2022-11-20 10:32:04,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [713206014] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:04,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:04,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:32:04,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918995404] [2022-11-20 10:32:04,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:04,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:32:04,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:04,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:32:04,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:32:04,700 INFO L87 Difference]: Start difference. First operand 750 states and 2569 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:04,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:04,940 INFO L93 Difference]: Finished difference Result 749 states and 2567 transitions. [2022-11-20 10:32:04,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:32:04,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-20 10:32:04,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:04,947 INFO L225 Difference]: With dead ends: 749 [2022-11-20 10:32:04,947 INFO L226 Difference]: Without dead ends: 749 [2022-11-20 10:32:04,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:32:04,949 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:04,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 3 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:32:04,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-11-20 10:32:04,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 749. [2022-11-20 10:32:04,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 617 states have (on average 4.160453808752026) internal successors, (2567), 748 states have internal predecessors, (2567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:04,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2567 transitions. [2022-11-20 10:32:04,979 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2567 transitions. Word has length 2 [2022-11-20 10:32:04,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:04,980 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 2567 transitions. [2022-11-20 10:32:04,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:04,980 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2567 transitions. [2022-11-20 10:32:04,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 10:32:04,981 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:04,981 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 10:32:04,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:05,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:05,192 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:05,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:05,193 INFO L85 PathProgramCache]: Analyzing trace with hash 26872, now seen corresponding path program 1 times [2022-11-20 10:32:05,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:05,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [659597299] [2022-11-20 10:32:05,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:05,194 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:05,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:05,195 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:05,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-20 10:32:05,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:05,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:32:05,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:05,445 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:32:05,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:32:05,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:05,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:05,494 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:05,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [659597299] [2022-11-20 10:32:05,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [659597299] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:05,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:05,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:32:05,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718702198] [2022-11-20 10:32:05,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:05,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:32:05,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:05,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:32:05,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:32:05,497 INFO L87 Difference]: Start difference. First operand 749 states and 2567 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:05,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:05,980 INFO L93 Difference]: Finished difference Result 1492 states and 5124 transitions. [2022-11-20 10:32:05,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:32:05,981 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-20 10:32:05,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:05,993 INFO L225 Difference]: With dead ends: 1492 [2022-11-20 10:32:05,993 INFO L226 Difference]: Without dead ends: 1492 [2022-11-20 10:32:05,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:32:05,994 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 38 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:05,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 6 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 10:32:05,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2022-11-20 10:32:06,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 749. [2022-11-20 10:32:06,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 617 states have (on average 4.158833063209076) internal successors, (2566), 748 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:06,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2566 transitions. [2022-11-20 10:32:06,034 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2566 transitions. Word has length 2 [2022-11-20 10:32:06,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:06,034 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 2566 transitions. [2022-11-20 10:32:06,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:06,035 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2566 transitions. [2022-11-20 10:32:06,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 10:32:06,035 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:06,035 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 10:32:06,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:06,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:06,247 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:06,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:06,247 INFO L85 PathProgramCache]: Analyzing trace with hash 838050, now seen corresponding path program 1 times [2022-11-20 10:32:06,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:06,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2099587452] [2022-11-20 10:32:06,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:06,249 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:06,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:06,250 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:06,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-20 10:32:06,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:06,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 10:32:06,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:06,476 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2022-11-20 10:32:06,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 47 [2022-11-20 10:32:06,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:32:06,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:06,589 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:06,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2099587452] [2022-11-20 10:32:06,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2099587452] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:06,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:06,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:32:06,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441682963] [2022-11-20 10:32:06,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:06,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:32:06,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:06,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:32:06,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:32:06,592 INFO L87 Difference]: Start difference. First operand 749 states and 2566 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:06,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:06,786 INFO L93 Difference]: Finished difference Result 748 states and 2565 transitions. [2022-11-20 10:32:06,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:32:06,787 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-20 10:32:06,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:06,794 INFO L225 Difference]: With dead ends: 748 [2022-11-20 10:32:06,794 INFO L226 Difference]: Without dead ends: 748 [2022-11-20 10:32:06,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:32:06,795 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:06,796 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] [2022-11-20 10:32:06,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-11-20 10:32:06,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 748. [2022-11-20 10:32:06,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 617 states have (on average 4.157212317666127) internal successors, (2565), 747 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:06,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2565 transitions. [2022-11-20 10:32:06,826 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2565 transitions. Word has length 3 [2022-11-20 10:32:06,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:06,827 INFO L495 AbstractCegarLoop]: Abstraction has 748 states and 2565 transitions. [2022-11-20 10:32:06,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:06,827 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2565 transitions. [2022-11-20 10:32:06,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 10:32:06,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:06,828 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 10:32:06,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:07,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:07,040 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:07,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:07,040 INFO L85 PathProgramCache]: Analyzing trace with hash 838052, now seen corresponding path program 1 times [2022-11-20 10:32:07,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:07,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1899344751] [2022-11-20 10:32:07,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:07,041 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:07,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:07,042 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:07,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-20 10:32:07,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:07,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 10:32:07,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:07,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:32:07,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:32:07,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:32:07,291 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-20 10:32:07,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 33 [2022-11-20 10:32:07,324 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-20 10:32:07,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-20 10:32:07,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:07,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:32:07,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:07,608 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:07,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1899344751] [2022-11-20 10:32:07,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1899344751] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 10:32:07,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:32:07,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2022-11-20 10:32:07,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441109393] [2022-11-20 10:32:07,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:07,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:32:07,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:07,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:32:07,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:32:07,610 INFO L87 Difference]: Start difference. First operand 748 states and 2565 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:07,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:07,873 INFO L93 Difference]: Finished difference Result 622 states and 2064 transitions. [2022-11-20 10:32:07,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:32:07,874 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-20 10:32:07,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:07,878 INFO L225 Difference]: With dead ends: 622 [2022-11-20 10:32:07,878 INFO L226 Difference]: Without dead ends: 622 [2022-11-20 10:32:07,879 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 [2022-11-20 10:32:07,879 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 77 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:07,880 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] [2022-11-20 10:32:07,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-11-20 10:32:07,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 622. [2022-11-20 10:32:07,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 519 states have (on average 3.976878612716763) internal successors, (2064), 621 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:07,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 2064 transitions. [2022-11-20 10:32:07,911 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 2064 transitions. Word has length 3 [2022-11-20 10:32:07,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:07,912 INFO L495 AbstractCegarLoop]: Abstraction has 622 states and 2064 transitions. [2022-11-20 10:32:07,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:07,912 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 2064 transitions. [2022-11-20 10:32:07,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 10:32:07,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:07,913 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 10:32:07,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:08,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:08,124 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:08,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:08,125 INFO L85 PathProgramCache]: Analyzing trace with hash 837894, now seen corresponding path program 1 times [2022-11-20 10:32:08,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:08,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [929614325] [2022-11-20 10:32:08,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:08,125 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:08,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:08,127 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:08,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-20 10:32:08,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:08,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 10:32:08,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:08,343 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:32:08,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:32:08,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:08,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:32:08,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:08,687 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:08,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [929614325] [2022-11-20 10:32:08,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [929614325] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:32:08,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:32:08,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-20 10:32:08,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801873606] [2022-11-20 10:32:08,688 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:32:08,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:32:08,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:08,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:32:08,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:32:08,689 INFO L87 Difference]: Start difference. First operand 622 states and 2064 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:09,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:09,433 INFO L93 Difference]: Finished difference Result 1861 states and 6186 transitions. [2022-11-20 10:32:09,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:32:09,434 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-20 10:32:09,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:09,447 INFO L225 Difference]: With dead ends: 1861 [2022-11-20 10:32:09,447 INFO L226 Difference]: Without dead ends: 1861 [2022-11-20 10:32:09,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:32:09,448 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 223 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:09,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 12 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 10:32:09,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2022-11-20 10:32:09,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 625. [2022-11-20 10:32:09,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 522 states have (on average 3.9655172413793105) internal successors, (2070), 624 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:09,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 2070 transitions. [2022-11-20 10:32:09,484 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 2070 transitions. Word has length 3 [2022-11-20 10:32:09,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:09,484 INFO L495 AbstractCegarLoop]: Abstraction has 625 states and 2070 transitions. [2022-11-20 10:32:09,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:09,485 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 2070 transitions. [2022-11-20 10:32:09,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 10:32:09,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:09,485 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 10:32:09,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-11-20 10:32:09,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:09,697 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:09,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:09,697 INFO L85 PathProgramCache]: Analyzing trace with hash 25995132, now seen corresponding path program 1 times [2022-11-20 10:32:09,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:09,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [113558569] [2022-11-20 10:32:09,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:09,697 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:09,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:09,699 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:09,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-20 10:32:09,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:09,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 10:32:09,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:09,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:32:09,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:32:09,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:32:09,919 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-20 10:32:09,919 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 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-20 10:32:09,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-20 10:32:10,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:10,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:10,017 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:10,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [113558569] [2022-11-20 10:32:10,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [113558569] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:10,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:10,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:32:10,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399288451] [2022-11-20 10:32:10,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:10,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:32:10,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:10,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:32:10,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:32:10,019 INFO L87 Difference]: Start difference. First operand 625 states and 2070 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:10,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:10,162 INFO L93 Difference]: Finished difference Result 628 states and 2080 transitions. [2022-11-20 10:32:10,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:32:10,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-20 10:32:10,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:10,167 INFO L225 Difference]: With dead ends: 628 [2022-11-20 10:32:10,167 INFO L226 Difference]: Without dead ends: 628 [2022-11-20 10:32:10,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:32:10,168 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:10,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-11-20 10:32:10,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-11-20 10:32:10,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 628. [2022-11-20 10:32:10,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 525 states have (on average 3.961904761904762) internal successors, (2080), 627 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:10,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 2080 transitions. [2022-11-20 10:32:10,189 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 2080 transitions. Word has length 4 [2022-11-20 10:32:10,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:10,190 INFO L495 AbstractCegarLoop]: Abstraction has 628 states and 2080 transitions. [2022-11-20 10:32:10,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:10,190 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 2080 transitions. [2022-11-20 10:32:10,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 10:32:10,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:10,191 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 10:32:10,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:10,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:10,403 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:10,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:10,403 INFO L85 PathProgramCache]: Analyzing trace with hash 25995133, now seen corresponding path program 1 times [2022-11-20 10:32:10,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:10,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1534756272] [2022-11-20 10:32:10,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:10,404 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:10,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:10,405 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:10,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-20 10:32:10,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:10,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 10:32:10,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:10,574 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 10:32:10,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 40 [2022-11-20 10:32:10,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:10,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:10,699 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:10,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1534756272] [2022-11-20 10:32:10,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1534756272] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:10,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:10,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:32:10,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605532426] [2022-11-20 10:32:10,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:10,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:32:10,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:10,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:32:10,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:32:10,701 INFO L87 Difference]: Start difference. First operand 628 states and 2080 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:10,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:10,838 INFO L93 Difference]: Finished difference Result 628 states and 2078 transitions. [2022-11-20 10:32:10,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:32:10,838 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-20 10:32:10,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:10,842 INFO L225 Difference]: With dead ends: 628 [2022-11-20 10:32:10,843 INFO L226 Difference]: Without dead ends: 628 [2022-11-20 10:32:10,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:32:10,843 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:10,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-11-20 10:32:10,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-11-20 10:32:10,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 628. [2022-11-20 10:32:10,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 525 states have (on average 3.958095238095238) internal successors, (2078), 627 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:10,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 2078 transitions. [2022-11-20 10:32:10,865 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 2078 transitions. Word has length 4 [2022-11-20 10:32:10,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:10,865 INFO L495 AbstractCegarLoop]: Abstraction has 628 states and 2078 transitions. [2022-11-20 10:32:10,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:10,866 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 2078 transitions. [2022-11-20 10:32:10,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 10:32:10,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:10,866 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 10:32:10,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:11,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:11,078 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:11,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:11,079 INFO L85 PathProgramCache]: Analyzing trace with hash 805844397, now seen corresponding path program 1 times [2022-11-20 10:32:11,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:11,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [273434427] [2022-11-20 10:32:11,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:11,079 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:11,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:11,080 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:11,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-20 10:32:11,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:11,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 10:32:11,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:11,259 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 10:32:11,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 10:32:11,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:11,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:11,314 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:11,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [273434427] [2022-11-20 10:32:11,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [273434427] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:11,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:11,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:32:11,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794740307] [2022-11-20 10:32:11,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:11,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:32:11,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:11,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:32:11,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:32:11,317 INFO L87 Difference]: Start difference. First operand 628 states and 2078 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:11,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:11,579 INFO L93 Difference]: Finished difference Result 365 states and 1174 transitions. [2022-11-20 10:32:11,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:32:11,580 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 5 [2022-11-20 10:32:11,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:11,582 INFO L225 Difference]: With dead ends: 365 [2022-11-20 10:32:11,582 INFO L226 Difference]: Without dead ends: 365 [2022-11-20 10:32:11,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:32:11,583 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 67 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:11,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 3 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:32:11,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-11-20 10:32:11,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2022-11-20 10:32:11,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 324 states have (on average 3.623456790123457) internal successors, (1174), 364 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:11,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 1174 transitions. [2022-11-20 10:32:11,596 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 1174 transitions. Word has length 5 [2022-11-20 10:32:11,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:11,597 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 1174 transitions. [2022-11-20 10:32:11,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:11,597 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 1174 transitions. [2022-11-20 10:32:11,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 10:32:11,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:11,598 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 10:32:11,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:11,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:11,809 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:11,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:11,809 INFO L85 PathProgramCache]: Analyzing trace with hash 805844398, now seen corresponding path program 1 times [2022-11-20 10:32:11,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:11,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1176244979] [2022-11-20 10:32:11,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:11,810 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:11,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:11,812 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:11,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-20 10:32:11,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:11,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 10:32:11,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:12,049 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:32:12,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:32:12,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:12,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:12,150 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:12,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1176244979] [2022-11-20 10:32:12,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1176244979] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:12,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:12,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:32:12,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627995833] [2022-11-20 10:32:12,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:12,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:32:12,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:12,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:32:12,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:32:12,152 INFO L87 Difference]: Start difference. First operand 365 states and 1174 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:12,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:12,572 INFO L93 Difference]: Finished difference Result 583 states and 1863 transitions. [2022-11-20 10:32:12,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:32:12,572 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 10:32:12,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:12,593 INFO L225 Difference]: With dead ends: 583 [2022-11-20 10:32:12,594 INFO L226 Difference]: Without dead ends: 583 [2022-11-20 10:32:12,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:32:12,595 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 121 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:12,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 7 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 10:32:12,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-11-20 10:32:12,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 433. [2022-11-20 10:32:12,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 392 states have (on average 3.75765306122449) internal successors, (1473), 432 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:12,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1473 transitions. [2022-11-20 10:32:12,612 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1473 transitions. Word has length 5 [2022-11-20 10:32:12,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:12,612 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 1473 transitions. [2022-11-20 10:32:12,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:12,613 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1473 transitions. [2022-11-20 10:32:12,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 10:32:12,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:12,613 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 10:32:12,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-11-20 10:32:12,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:12,830 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:12,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:12,831 INFO L85 PathProgramCache]: Analyzing trace with hash 805387274, now seen corresponding path program 1 times [2022-11-20 10:32:12,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:12,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [390387907] [2022-11-20 10:32:12,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:12,832 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:12,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:12,833 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:12,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-20 10:32:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:12,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:32:12,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:12,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:32:12,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:32:13,091 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-20 10:32:13,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-20 10:32:13,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-20 10:32:13,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:13,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:32:13,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:13,628 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:13,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [390387907] [2022-11-20 10:32:13,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [390387907] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:32:13,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:32:13,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-20 10:32:13,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248327709] [2022-11-20 10:32:13,629 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:32:13,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 10:32:13,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:13,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 10:32:13,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:32:13,630 INFO L87 Difference]: Start difference. First operand 433 states and 1473 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:13,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:13,998 INFO L93 Difference]: Finished difference Result 820 states and 2832 transitions. [2022-11-20 10:32:13,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:32:13,999 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 10:32:13,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:14,004 INFO L225 Difference]: With dead ends: 820 [2022-11-20 10:32:14,005 INFO L226 Difference]: Without dead ends: 820 [2022-11-20 10:32:14,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-20 10:32:14,005 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 118 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:14,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 23 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 41 Invalid, 0 Unknown, 146 Unchecked, 0.3s Time] [2022-11-20 10:32:14,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2022-11-20 10:32:14,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 423. [2022-11-20 10:32:14,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 386 states have (on average 3.7357512953367875) internal successors, (1442), 422 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:14,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1442 transitions. [2022-11-20 10:32:14,026 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1442 transitions. Word has length 5 [2022-11-20 10:32:14,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:14,026 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 1442 transitions. [2022-11-20 10:32:14,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:14,027 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1442 transitions. [2022-11-20 10:32:14,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 10:32:14,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:14,027 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 10:32:14,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:14,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:14,240 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:14,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:14,240 INFO L85 PathProgramCache]: Analyzing trace with hash 805387275, now seen corresponding path program 1 times [2022-11-20 10:32:14,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:14,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1157225492] [2022-11-20 10:32:14,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:14,241 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:14,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:14,242 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:14,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-20 10:32:14,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:14,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 10:32:14,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:14,454 INFO L321 Elim1Store]: treesize reduction 101, result has 20.5 percent of original size [2022-11-20 10:32:14,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 44 [2022-11-20 10:32:14,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:32:14,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:14,505 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:14,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1157225492] [2022-11-20 10:32:14,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1157225492] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:14,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:14,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:32:14,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707758399] [2022-11-20 10:32:14,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:14,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:32:14,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:14,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:32:14,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:32:14,507 INFO L87 Difference]: Start difference. First operand 423 states and 1442 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:14,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:14,688 INFO L93 Difference]: Finished difference Result 402 states and 1378 transitions. [2022-11-20 10:32:14,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:32:14,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 10:32:14,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:14,693 INFO L225 Difference]: With dead ends: 402 [2022-11-20 10:32:14,693 INFO L226 Difference]: Without dead ends: 402 [2022-11-20 10:32:14,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:32:14,694 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:14,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 3 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:32:14,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-11-20 10:32:14,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 399. [2022-11-20 10:32:14,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 368 states have (on average 3.7282608695652173) internal successors, (1372), 398 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:14,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1372 transitions. [2022-11-20 10:32:14,727 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1372 transitions. Word has length 5 [2022-11-20 10:32:14,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:14,728 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 1372 transitions. [2022-11-20 10:32:14,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:14,728 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1372 transitions. [2022-11-20 10:32:14,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 10:32:14,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:14,730 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 10:32:14,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:14,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:14,942 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:14,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:14,943 INFO L85 PathProgramCache]: Analyzing trace with hash -788622522, now seen corresponding path program 1 times [2022-11-20 10:32:14,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:14,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [542753038] [2022-11-20 10:32:14,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:14,944 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:14,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:14,945 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:14,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-20 10:32:15,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:15,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:32:15,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:15,188 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:32:15,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:32:15,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:15,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:15,338 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:15,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [542753038] [2022-11-20 10:32:15,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [542753038] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:15,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:15,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:32:15,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11648654] [2022-11-20 10:32:15,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:15,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:32:15,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:15,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:32:15,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:32:15,340 INFO L87 Difference]: Start difference. First operand 399 states and 1372 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:15,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:15,588 INFO L93 Difference]: Finished difference Result 402 states and 1377 transitions. [2022-11-20 10:32:15,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:32:15,589 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 10:32:15,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:15,592 INFO L225 Difference]: With dead ends: 402 [2022-11-20 10:32:15,592 INFO L226 Difference]: Without dead ends: 402 [2022-11-20 10:32:15,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:32:15,593 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:15,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 9 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 33 Unchecked, 0.2s Time] [2022-11-20 10:32:15,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-11-20 10:32:15,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 402. [2022-11-20 10:32:15,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 371 states have (on average 3.711590296495957) internal successors, (1377), 401 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:15,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1377 transitions. [2022-11-20 10:32:15,607 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1377 transitions. Word has length 6 [2022-11-20 10:32:15,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:15,607 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 1377 transitions. [2022-11-20 10:32:15,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:15,607 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1377 transitions. [2022-11-20 10:32:15,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 10:32:15,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:15,609 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 10:32:15,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:15,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:15,827 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:15,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:15,828 INFO L85 PathProgramCache]: Analyzing trace with hash -788459601, now seen corresponding path program 1 times [2022-11-20 10:32:15,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:15,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1605086515] [2022-11-20 10:32:15,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:15,828 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 [2022-11-20 10:32:15,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:15,829 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:15,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-20 10:32:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:15,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 10:32:15,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:16,022 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 10:32:16,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 29 [2022-11-20 10:32:16,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:16,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:16,051 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:16,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1605086515] [2022-11-20 10:32:16,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1605086515] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:16,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:16,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:32:16,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177637225] [2022-11-20 10:32:16,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:16,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:32:16,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:16,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:32:16,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:32:16,053 INFO L87 Difference]: Start difference. First operand 402 states and 1377 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:16,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:16,231 INFO L93 Difference]: Finished difference Result 378 states and 1305 transitions. [2022-11-20 10:32:16,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:32:16,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 10:32:16,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:16,234 INFO L225 Difference]: With dead ends: 378 [2022-11-20 10:32:16,235 INFO L226 Difference]: Without dead ends: 378 [2022-11-20 10:32:16,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:32:16,235 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:16,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 3 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:32:16,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-11-20 10:32:16,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2022-11-20 10:32:16,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 353 states have (on average 3.696883852691218) internal successors, (1305), 377 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:16,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1305 transitions. [2022-11-20 10:32:16,265 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1305 transitions. Word has length 6 [2022-11-20 10:32:16,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:16,265 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 1305 transitions. [2022-11-20 10:32:16,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:16,266 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1305 transitions. [2022-11-20 10:32:16,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 10:32:16,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:16,266 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 10:32:16,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 10:32:16,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:16,478 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:16,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:16,478 INFO L85 PathProgramCache]: Analyzing trace with hash -788459599, now seen corresponding path program 1 times [2022-11-20 10:32:16,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:16,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [636394511] [2022-11-20 10:32:16,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:16,479 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:16,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:16,480 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:16,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-20 10:32:16,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:16,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 10:32:16,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:16,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:32:16,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:32:16,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:32:16,696 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-20 10:32:16,696 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 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-20 10:32:16,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-20 10:32:16,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:16,741 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:16,741 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:16,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [636394511] [2022-11-20 10:32:16,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [636394511] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:16,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:16,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:32:16,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638893085] [2022-11-20 10:32:16,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:16,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:32:16,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:16,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:32:16,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:32:16,743 INFO L87 Difference]: Start difference. First operand 378 states and 1305 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:16,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:16,908 INFO L93 Difference]: Finished difference Result 354 states and 1233 transitions. [2022-11-20 10:32:16,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:32:16,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 10:32:16,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:16,911 INFO L225 Difference]: With dead ends: 354 [2022-11-20 10:32:16,911 INFO L226 Difference]: Without dead ends: 354 [2022-11-20 10:32:16,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:32:16,912 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:16,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 3 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:32:16,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-11-20 10:32:16,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 354. [2022-11-20 10:32:16,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 335 states have (on average 3.680597014925373) internal successors, (1233), 353 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:16,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1233 transitions. [2022-11-20 10:32:16,924 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1233 transitions. Word has length 6 [2022-11-20 10:32:16,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:16,925 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 1233 transitions. [2022-11-20 10:32:16,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:16,925 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1233 transitions. [2022-11-20 10:32:16,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 10:32:16,926 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:16,926 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-20 10:32:16,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:17,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:17,138 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:17,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:17,138 INFO L85 PathProgramCache]: Analyzing trace with hash -803275656, now seen corresponding path program 2 times [2022-11-20 10:32:17,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:17,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1290523852] [2022-11-20 10:32:17,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:32:17,139 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:17,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:17,140 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:17,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-20 10:32:17,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:32:17,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:32:17,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 10:32:17,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:17,412 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:32:17,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:32:17,595 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:17,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:32:18,414 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:18,414 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:18,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1290523852] [2022-11-20 10:32:18,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1290523852] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:32:18,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:32:18,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:32:18,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262755620] [2022-11-20 10:32:18,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:32:18,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:32:18,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:18,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:32:18,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:32:18,416 INFO L87 Difference]: Start difference. First operand 354 states and 1233 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:23,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:23,668 INFO L93 Difference]: Finished difference Result 3376 states and 12025 transitions. [2022-11-20 10:32:23,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 10:32:23,669 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 10:32:23,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:23,695 INFO L225 Difference]: With dead ends: 3376 [2022-11-20 10:32:23,696 INFO L226 Difference]: Without dead ends: 3376 [2022-11-20 10:32:23,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:32:23,697 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 801 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 801 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:23,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [801 Valid, 87 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-20 10:32:23,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3376 states. [2022-11-20 10:32:23,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3376 to 360. [2022-11-20 10:32:23,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 341 states have (on average 3.6510263929618767) internal successors, (1245), 359 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:23,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1245 transitions. [2022-11-20 10:32:23,752 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1245 transitions. Word has length 6 [2022-11-20 10:32:23,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:23,752 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 1245 transitions. [2022-11-20 10:32:23,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:23,753 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1245 transitions. [2022-11-20 10:32:23,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 10:32:23,754 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:23,754 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:23,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:23,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:23,955 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:23,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:23,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1322500900, now seen corresponding path program 1 times [2022-11-20 10:32:23,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:23,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1699179543] [2022-11-20 10:32:23,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:23,956 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:23,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:23,957 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:23,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-20 10:32:24,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:24,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:32:24,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:24,206 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:32:24,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:32:24,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:24,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:24,367 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:24,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1699179543] [2022-11-20 10:32:24,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1699179543] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:24,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:24,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:32:24,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560883718] [2022-11-20 10:32:24,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:24,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:32:24,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:24,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:32:24,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:32:24,369 INFO L87 Difference]: Start difference. First operand 360 states and 1245 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:24,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:24,629 INFO L93 Difference]: Finished difference Result 361 states and 1247 transitions. [2022-11-20 10:32:24,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:32:24,629 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 10:32:24,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:24,637 INFO L225 Difference]: With dead ends: 361 [2022-11-20 10:32:24,643 INFO L226 Difference]: Without dead ends: 361 [2022-11-20 10:32:24,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:32:24,644 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:24,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 10 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 29 Unchecked, 0.2s Time] [2022-11-20 10:32:24,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-11-20 10:32:24,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 361. [2022-11-20 10:32:24,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 342 states have (on average 3.646198830409357) internal successors, (1247), 360 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:24,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1247 transitions. [2022-11-20 10:32:24,662 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1247 transitions. Word has length 7 [2022-11-20 10:32:24,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:24,662 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 1247 transitions. [2022-11-20 10:32:24,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:24,663 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1247 transitions. [2022-11-20 10:32:24,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 10:32:24,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:24,665 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:24,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:24,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:24,879 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:24,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:24,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1327517320, now seen corresponding path program 2 times [2022-11-20 10:32:24,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:24,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [379898492] [2022-11-20 10:32:24,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:32:24,880 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 [2022-11-20 10:32:24,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:24,881 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:24,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-20 10:32:25,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:32:25,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:32:25,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:32:25,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:25,152 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:32:25,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:32:25,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:25,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:32:25,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:25,840 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:25,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [379898492] [2022-11-20 10:32:25,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [379898492] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:32:25,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:32:25,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:32:25,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013844813] [2022-11-20 10:32:25,840 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:32:25,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:32:25,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:25,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:32:25,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:32:25,842 INFO L87 Difference]: Start difference. First operand 361 states and 1247 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:27,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:27,529 INFO L93 Difference]: Finished difference Result 847 states and 2837 transitions. [2022-11-20 10:32:27,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:32:27,530 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 10:32:27,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:27,534 INFO L225 Difference]: With dead ends: 847 [2022-11-20 10:32:27,535 INFO L226 Difference]: Without dead ends: 847 [2022-11-20 10:32:27,535 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 [2022-11-20 10:32:27,536 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 281 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:27,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 17 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 10:32:27,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2022-11-20 10:32:27,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 541. [2022-11-20 10:32:27,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 522 states have (on average 3.92911877394636) internal successors, (2051), 540 states have internal predecessors, (2051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:27,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 2051 transitions. [2022-11-20 10:32:27,556 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 2051 transitions. Word has length 7 [2022-11-20 10:32:27,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:27,557 INFO L495 AbstractCegarLoop]: Abstraction has 541 states and 2051 transitions. [2022-11-20 10:32:27,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:27,557 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 2051 transitions. [2022-11-20 10:32:27,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 10:32:27,558 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:27,558 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:27,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:27,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:27,770 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:27,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:27,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1327551453, now seen corresponding path program 1 times [2022-11-20 10:32:27,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:27,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1758921713] [2022-11-20 10:32:27,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:27,772 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:27,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:27,773 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:27,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-20 10:32:27,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:27,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:32:27,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:28,027 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:32:28,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:32:28,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:28,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:28,244 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:28,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1758921713] [2022-11-20 10:32:28,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1758921713] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:28,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:28,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:32:28,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337137651] [2022-11-20 10:32:28,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:28,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:32:28,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:28,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:32:28,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:32:28,245 INFO L87 Difference]: Start difference. First operand 541 states and 2051 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:28,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:28,427 INFO L93 Difference]: Finished difference Result 543 states and 2060 transitions. [2022-11-20 10:32:28,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:32:28,428 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 10:32:28,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:28,431 INFO L225 Difference]: With dead ends: 543 [2022-11-20 10:32:28,431 INFO L226 Difference]: Without dead ends: 543 [2022-11-20 10:32:28,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:32:28,432 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:28,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 11 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-11-20 10:32:28,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-11-20 10:32:28,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 543. [2022-11-20 10:32:28,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 524 states have (on average 3.931297709923664) internal successors, (2060), 542 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:28,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 2060 transitions. [2022-11-20 10:32:28,474 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 2060 transitions. Word has length 7 [2022-11-20 10:32:28,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:28,475 INFO L495 AbstractCegarLoop]: Abstraction has 543 states and 2060 transitions. [2022-11-20 10:32:28,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:28,475 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 2060 transitions. [2022-11-20 10:32:28,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 10:32:28,476 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:28,477 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1] [2022-11-20 10:32:28,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:28,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:28,692 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:28,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:28,693 INFO L85 PathProgramCache]: Analyzing trace with hash 868278858, now seen corresponding path program 2 times [2022-11-20 10:32:28,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:28,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1846080378] [2022-11-20 10:32:28,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:32:28,694 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:28,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:28,695 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:28,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-20 10:32:28,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:32:28,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:32:28,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 10:32:28,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:28,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:32:28,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:32:28,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:32:28,972 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-20 10:32:28,972 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 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-20 10:32:28,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-20 10:32:29,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:32:29,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:29,104 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:29,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1846080378] [2022-11-20 10:32:29,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1846080378] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:29,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:29,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:32:29,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073201649] [2022-11-20 10:32:29,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:29,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:32:29,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:29,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:32:29,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:32:29,106 INFO L87 Difference]: Start difference. First operand 543 states and 2060 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:29,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:29,223 INFO L93 Difference]: Finished difference Result 541 states and 2055 transitions. [2022-11-20 10:32:29,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:32:29,223 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 7 [2022-11-20 10:32:29,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:29,226 INFO L225 Difference]: With dead ends: 541 [2022-11-20 10:32:29,226 INFO L226 Difference]: Without dead ends: 541 [2022-11-20 10:32:29,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:32:29,227 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:29,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2022-11-20 10:32:29,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-11-20 10:32:29,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 541. [2022-11-20 10:32:29,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 522 states have (on average 3.9367816091954024) internal successors, (2055), 540 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:29,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 2055 transitions. [2022-11-20 10:32:29,246 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 2055 transitions. Word has length 7 [2022-11-20 10:32:29,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:29,246 INFO L495 AbstractCegarLoop]: Abstraction has 541 states and 2055 transitions. [2022-11-20 10:32:29,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:29,247 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 2055 transitions. [2022-11-20 10:32:29,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 10:32:29,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:29,247 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:29,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:29,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:29,460 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:29,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:29,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1795411190, now seen corresponding path program 1 times [2022-11-20 10:32:29,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:29,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [883663577] [2022-11-20 10:32:29,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:29,461 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:29,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:29,462 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:29,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-20 10:32:29,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:29,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 10:32:29,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:29,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:29,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:29,597 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:29,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [883663577] [2022-11-20 10:32:29,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [883663577] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:29,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:29,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:32:29,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668347712] [2022-11-20 10:32:29,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:29,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:32:29,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:29,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:32:29,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:32:29,599 INFO L87 Difference]: Start difference. First operand 541 states and 2055 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:29,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:29,766 INFO L93 Difference]: Finished difference Result 413 states and 1479 transitions. [2022-11-20 10:32:29,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:32:29,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 10:32:29,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:29,768 INFO L225 Difference]: With dead ends: 413 [2022-11-20 10:32:29,769 INFO L226 Difference]: Without dead ends: 413 [2022-11-20 10:32:29,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:32:29,769 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 22 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:29,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 3 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:32:29,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-11-20 10:32:29,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 413. [2022-11-20 10:32:29,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 402 states have (on average 3.6791044776119404) internal successors, (1479), 412 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:29,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1479 transitions. [2022-11-20 10:32:29,783 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1479 transitions. Word has length 8 [2022-11-20 10:32:29,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:29,784 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 1479 transitions. [2022-11-20 10:32:29,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:29,784 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1479 transitions. [2022-11-20 10:32:29,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 10:32:29,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:29,785 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:29,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:29,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:29,997 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:29,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:29,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1795412078, now seen corresponding path program 1 times [2022-11-20 10:32:29,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:29,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1578744269] [2022-11-20 10:32:29,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:29,998 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:29,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:29,999 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:30,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-20 10:32:30,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:30,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:32:30,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:30,275 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:32:30,275 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 [2022-11-20 10:32:30,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:30,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:30,481 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:30,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1578744269] [2022-11-20 10:32:30,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1578744269] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:30,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:30,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:32:30,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637939187] [2022-11-20 10:32:30,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:30,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:32:30,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:30,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:32:30,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:32:30,483 INFO L87 Difference]: Start difference. First operand 413 states and 1479 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:30,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:30,652 INFO L93 Difference]: Finished difference Result 417 states and 1499 transitions. [2022-11-20 10:32:30,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:32:30,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 10:32:30,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:30,654 INFO L225 Difference]: With dead ends: 417 [2022-11-20 10:32:30,654 INFO L226 Difference]: Without dead ends: 417 [2022-11-20 10:32:30,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:32:30,655 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:30,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 11 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-20 10:32:30,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-11-20 10:32:30,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 415. [2022-11-20 10:32:30,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 404 states have (on average 3.6831683168316833) internal successors, (1488), 414 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:30,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1488 transitions. [2022-11-20 10:32:30,684 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1488 transitions. Word has length 8 [2022-11-20 10:32:30,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:30,684 INFO L495 AbstractCegarLoop]: Abstraction has 415 states and 1488 transitions. [2022-11-20 10:32:30,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:30,685 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1488 transitions. [2022-11-20 10:32:30,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 10:32:30,685 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:30,686 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:30,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:30,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:30,897 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:30,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:30,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1795574983, now seen corresponding path program 1 times [2022-11-20 10:32:30,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:30,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1738264035] [2022-11-20 10:32:30,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:30,898 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:30,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:30,899 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:30,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-20 10:32:31,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:31,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:32:31,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:31,186 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:32:31,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:32:31,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:31,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:31,343 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:31,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1738264035] [2022-11-20 10:32:31,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1738264035] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:31,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:31,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:32:31,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901385490] [2022-11-20 10:32:31,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:31,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:32:31,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:31,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:32:31,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:32:31,345 INFO L87 Difference]: Start difference. First operand 415 states and 1488 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:31,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:31,547 INFO L93 Difference]: Finished difference Result 421 states and 1507 transitions. [2022-11-20 10:32:31,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:32:31,551 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 10:32:31,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:31,553 INFO L225 Difference]: With dead ends: 421 [2022-11-20 10:32:31,554 INFO L226 Difference]: Without dead ends: 421 [2022-11-20 10:32:31,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:32:31,555 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:31,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 12 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 27 Unchecked, 0.2s Time] [2022-11-20 10:32:31,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-11-20 10:32:31,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 421. [2022-11-20 10:32:31,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 410 states have (on average 3.675609756097561) internal successors, (1507), 420 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:31,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1507 transitions. [2022-11-20 10:32:31,568 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1507 transitions. Word has length 8 [2022-11-20 10:32:31,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:31,568 INFO L495 AbstractCegarLoop]: Abstraction has 421 states and 1507 transitions. [2022-11-20 10:32:31,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:31,569 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1507 transitions. [2022-11-20 10:32:31,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 10:32:31,570 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:31,572 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:31,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:31,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:31,783 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:31,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:31,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1795574828, now seen corresponding path program 2 times [2022-11-20 10:32:31,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:31,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [428594905] [2022-11-20 10:32:31,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:32:31,784 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:31,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:31,785 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:31,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-20 10:32:31,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:32:31,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:32:31,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:32:31,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:32,030 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:32:32,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:32:32,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:32,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:32,218 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:32,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [428594905] [2022-11-20 10:32:32,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [428594905] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:32,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:32,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:32:32,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868921849] [2022-11-20 10:32:32,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:32,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:32:32,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:32,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:32:32,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:32:32,219 INFO L87 Difference]: Start difference. First operand 421 states and 1507 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:32,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:32,380 INFO L93 Difference]: Finished difference Result 439 states and 1596 transitions. [2022-11-20 10:32:32,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:32:32,381 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 10:32:32,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:32,382 INFO L225 Difference]: With dead ends: 439 [2022-11-20 10:32:32,383 INFO L226 Difference]: Without dead ends: 439 [2022-11-20 10:32:32,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:32:32,383 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:32,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 11 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 62 Unchecked, 0.1s Time] [2022-11-20 10:32:32,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-11-20 10:32:32,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 439. [2022-11-20 10:32:32,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 428 states have (on average 3.7289719626168223) internal successors, (1596), 438 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:32,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1596 transitions. [2022-11-20 10:32:32,394 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1596 transitions. Word has length 8 [2022-11-20 10:32:32,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:32,394 INFO L495 AbstractCegarLoop]: Abstraction has 439 states and 1596 transitions. [2022-11-20 10:32:32,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:32,394 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1596 transitions. [2022-11-20 10:32:32,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 10:32:32,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:32,395 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:32,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:32,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:32,606 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:32,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:32,607 INFO L85 PathProgramCache]: Analyzing trace with hash -397396736, now seen corresponding path program 1 times [2022-11-20 10:32:32,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:32,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [895525223] [2022-11-20 10:32:32,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:32,607 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:32,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:32,608 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:32,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-20 10:32:32,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:32,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:32:32,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:32,848 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:32:32,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:32:33,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:33,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:33,092 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:33,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [895525223] [2022-11-20 10:32:33,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [895525223] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:33,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:33,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:32:33,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744527062] [2022-11-20 10:32:33,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:33,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:32:33,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:33,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:32:33,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:32:33,094 INFO L87 Difference]: Start difference. First operand 439 states and 1596 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:33,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:33,275 INFO L93 Difference]: Finished difference Result 445 states and 1609 transitions. [2022-11-20 10:32:33,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:32:33,275 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 10:32:33,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:33,277 INFO L225 Difference]: With dead ends: 445 [2022-11-20 10:32:33,277 INFO L226 Difference]: Without dead ends: 445 [2022-11-20 10:32:33,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:32:33,278 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:33,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-20 10:32:33,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-11-20 10:32:33,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 444. [2022-11-20 10:32:33,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 433 states have (on average 3.7066974595842956) internal successors, (1605), 443 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:33,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1605 transitions. [2022-11-20 10:32:33,293 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1605 transitions. Word has length 9 [2022-11-20 10:32:33,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:33,294 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 1605 transitions. [2022-11-20 10:32:33,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:33,294 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1605 transitions. [2022-11-20 10:32:33,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 10:32:33,294 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:33,294 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:33,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:33,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:33,495 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:33,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:33,495 INFO L85 PathProgramCache]: Analyzing trace with hash -391062785, now seen corresponding path program 1 times [2022-11-20 10:32:33,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:33,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917572791] [2022-11-20 10:32:33,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:33,496 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:33,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:33,497 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:33,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-20 10:32:33,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:33,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 10:32:33,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:33,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:33,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:33,710 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:33,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [917572791] [2022-11-20 10:32:33,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [917572791] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:33,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:33,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 10:32:33,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503326139] [2022-11-20 10:32:33,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:33,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:32:33,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:33,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:32:33,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:32:33,711 INFO L87 Difference]: Start difference. First operand 444 states and 1605 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:34,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:34,485 INFO L93 Difference]: Finished difference Result 880 states and 3028 transitions. [2022-11-20 10:32:34,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:32:34,485 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 10:32:34,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:34,489 INFO L225 Difference]: With dead ends: 880 [2022-11-20 10:32:34,489 INFO L226 Difference]: Without dead ends: 880 [2022-11-20 10:32:34,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:32:34,490 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 136 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:34,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 28 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 10:32:34,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-11-20 10:32:34,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 553. [2022-11-20 10:32:34,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 542 states have (on average 3.8468634686346865) internal successors, (2085), 552 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:34,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 2085 transitions. [2022-11-20 10:32:34,509 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 2085 transitions. Word has length 9 [2022-11-20 10:32:34,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:34,510 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 2085 transitions. [2022-11-20 10:32:34,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:34,510 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 2085 transitions. [2022-11-20 10:32:34,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 10:32:34,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:34,511 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:34,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:34,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:34,723 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:34,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:34,723 INFO L85 PathProgramCache]: Analyzing trace with hash -391223396, now seen corresponding path program 2 times [2022-11-20 10:32:34,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:34,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [166552054] [2022-11-20 10:32:34,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:32:34,724 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:34,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:34,725 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:34,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-20 10:32:34,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:32:34,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:32:34,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:32:34,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:34,956 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:32:34,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:32:35,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:35,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:35,192 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:35,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [166552054] [2022-11-20 10:32:35,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [166552054] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:35,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:35,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:32:35,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853905270] [2022-11-20 10:32:35,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:35,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:32:35,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:35,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:32:35,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:32:35,194 INFO L87 Difference]: Start difference. First operand 553 states and 2085 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:35,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:35,369 INFO L93 Difference]: Finished difference Result 554 states and 2088 transitions. [2022-11-20 10:32:35,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:32:35,370 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 10:32:35,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:35,372 INFO L225 Difference]: With dead ends: 554 [2022-11-20 10:32:35,372 INFO L226 Difference]: Without dead ends: 554 [2022-11-20 10:32:35,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:32:35,373 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:35,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-11-20 10:32:35,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-11-20 10:32:35,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 553. [2022-11-20 10:32:35,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 542 states have (on average 3.8468634686346865) internal successors, (2085), 552 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:35,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 2085 transitions. [2022-11-20 10:32:35,389 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 2085 transitions. Word has length 9 [2022-11-20 10:32:35,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:35,390 INFO L495 AbstractCegarLoop]: Abstraction has 553 states and 2085 transitions. [2022-11-20 10:32:35,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:35,390 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 2085 transitions. [2022-11-20 10:32:35,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 10:32:35,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:35,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:35,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:32:35,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:35,602 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:35,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:35,602 INFO L85 PathProgramCache]: Analyzing trace with hash -391222745, now seen corresponding path program 2 times [2022-11-20 10:32:35,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:35,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [713305063] [2022-11-20 10:32:35,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:32:35,603 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:35,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:35,604 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:35,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-20 10:32:35,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:32:35,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:32:35,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 10:32:35,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:35,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:35,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:35,795 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:35,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [713305063] [2022-11-20 10:32:35,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [713305063] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:35,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:35,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 10:32:35,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581510187] [2022-11-20 10:32:35,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:35,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:32:35,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:35,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:32:35,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:32:35,797 INFO L87 Difference]: Start difference. First operand 553 states and 2085 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:36,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:36,444 INFO L93 Difference]: Finished difference Result 1091 states and 3925 transitions. [2022-11-20 10:32:36,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:32:36,445 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 10:32:36,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:36,450 INFO L225 Difference]: With dead ends: 1091 [2022-11-20 10:32:36,450 INFO L226 Difference]: Without dead ends: 1091 [2022-11-20 10:32:36,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:32:36,451 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 129 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:36,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 15 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 10:32:36,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2022-11-20 10:32:36,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 583. [2022-11-20 10:32:36,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 572 states have (on average 3.9388111888111887) internal successors, (2253), 582 states have internal predecessors, (2253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:36,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 2253 transitions. [2022-11-20 10:32:36,486 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 2253 transitions. Word has length 9 [2022-11-20 10:32:36,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:36,486 INFO L495 AbstractCegarLoop]: Abstraction has 583 states and 2253 transitions. [2022-11-20 10:32:36,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:36,487 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 2253 transitions. [2022-11-20 10:32:36,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 10:32:36,487 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:36,487 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:36,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:36,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:36,699 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:36,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:36,700 INFO L85 PathProgramCache]: Analyzing trace with hash 176824410, now seen corresponding path program 1 times [2022-11-20 10:32:36,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:36,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1927380756] [2022-11-20 10:32:36,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:36,700 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:36,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:36,701 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:36,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-20 10:32:36,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:36,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 10:32:36,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:36,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:36,937 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:36,938 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:36,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1927380756] [2022-11-20 10:32:36,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1927380756] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:36,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:36,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:32:36,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964836195] [2022-11-20 10:32:36,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:36,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:32:36,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:36,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:32:36,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:32:36,939 INFO L87 Difference]: Start difference. First operand 583 states and 2253 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:37,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:37,428 INFO L93 Difference]: Finished difference Result 982 states and 3728 transitions. [2022-11-20 10:32:37,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:32:37,428 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 10:32:37,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:37,432 INFO L225 Difference]: With dead ends: 982 [2022-11-20 10:32:37,432 INFO L226 Difference]: Without dead ends: 982 [2022-11-20 10:32:37,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:32:37,433 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 56 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:37,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 11 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 10:32:37,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2022-11-20 10:32:37,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 870. [2022-11-20 10:32:37,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 859 states have (on average 3.9278230500582074) internal successors, (3374), 869 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:37,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 3374 transitions. [2022-11-20 10:32:37,474 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 3374 transitions. Word has length 9 [2022-11-20 10:32:37,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:37,474 INFO L495 AbstractCegarLoop]: Abstraction has 870 states and 3374 transitions. [2022-11-20 10:32:37,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:37,474 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 3374 transitions. [2022-11-20 10:32:37,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 10:32:37,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:37,475 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:37,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:37,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:37,687 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:37,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:37,687 INFO L85 PathProgramCache]: Analyzing trace with hash 176824041, now seen corresponding path program 1 times [2022-11-20 10:32:37,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:37,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [941754937] [2022-11-20 10:32:37,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:37,688 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:37,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:37,689 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:37,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-20 10:32:37,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:37,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:32:37,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:37,945 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:32:37,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:32:38,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:38,156 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:38,156 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:38,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [941754937] [2022-11-20 10:32:38,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [941754937] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:38,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:38,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:32:38,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947072379] [2022-11-20 10:32:38,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:38,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:32:38,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:38,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:32:38,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:32:38,158 INFO L87 Difference]: Start difference. First operand 870 states and 3374 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:38,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:38,322 INFO L93 Difference]: Finished difference Result 880 states and 3434 transitions. [2022-11-20 10:32:38,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:32:38,322 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 10:32:38,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:38,326 INFO L225 Difference]: With dead ends: 880 [2022-11-20 10:32:38,326 INFO L226 Difference]: Without dead ends: 880 [2022-11-20 10:32:38,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:32:38,327 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:38,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2022-11-20 10:32:38,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-11-20 10:32:38,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 876. [2022-11-20 10:32:38,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 865 states have (on average 3.9398843930635836) internal successors, (3408), 875 states have internal predecessors, (3408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:38,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 3408 transitions. [2022-11-20 10:32:38,365 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 3408 transitions. Word has length 9 [2022-11-20 10:32:38,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:38,365 INFO L495 AbstractCegarLoop]: Abstraction has 876 states and 3408 transitions. [2022-11-20 10:32:38,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:38,366 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 3408 transitions. [2022-11-20 10:32:38,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 10:32:38,366 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:38,367 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:38,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-11-20 10:32:38,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:38,578 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:38,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:38,579 INFO L85 PathProgramCache]: Analyzing trace with hash 176803364, now seen corresponding path program 1 times [2022-11-20 10:32:38,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:38,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [61067099] [2022-11-20 10:32:38,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:38,580 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:38,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:38,581 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:38,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-20 10:32:38,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:38,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:32:38,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:38,857 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:32:38,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:32:39,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:39,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:39,023 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:39,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [61067099] [2022-11-20 10:32:39,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [61067099] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:39,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:39,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:32:39,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804842494] [2022-11-20 10:32:39,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:39,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:32:39,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:39,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:32:39,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:32:39,025 INFO L87 Difference]: Start difference. First operand 876 states and 3408 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:39,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:39,191 INFO L93 Difference]: Finished difference Result 876 states and 3405 transitions. [2022-11-20 10:32:39,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:32:39,191 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 10:32:39,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:39,195 INFO L225 Difference]: With dead ends: 876 [2022-11-20 10:32:39,195 INFO L226 Difference]: Without dead ends: 876 [2022-11-20 10:32:39,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:32:39,196 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:39,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2022-11-20 10:32:39,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2022-11-20 10:32:39,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 876. [2022-11-20 10:32:39,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 865 states have (on average 3.9364161849710984) internal successors, (3405), 875 states have internal predecessors, (3405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:39,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 3405 transitions. [2022-11-20 10:32:39,219 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 3405 transitions. Word has length 9 [2022-11-20 10:32:39,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:39,220 INFO L495 AbstractCegarLoop]: Abstraction has 876 states and 3405 transitions. [2022-11-20 10:32:39,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:39,220 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 3405 transitions. [2022-11-20 10:32:39,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 10:32:39,221 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:39,221 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:39,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:39,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:39,432 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:39,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:39,433 INFO L85 PathProgramCache]: Analyzing trace with hash 176798931, now seen corresponding path program 2 times [2022-11-20 10:32:39,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:39,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1239167674] [2022-11-20 10:32:39,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:32:39,433 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:39,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:39,435 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:39,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-20 10:32:39,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:32:39,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:32:39,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:32:39,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:39,686 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:32:39,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:32:39,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:39,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:39,888 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:39,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1239167674] [2022-11-20 10:32:39,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1239167674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:39,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:39,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:32:39,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732676180] [2022-11-20 10:32:39,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:39,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:32:39,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:39,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:32:39,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:32:39,890 INFO L87 Difference]: Start difference. First operand 876 states and 3405 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:40,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:40,056 INFO L93 Difference]: Finished difference Result 916 states and 3610 transitions. [2022-11-20 10:32:40,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:32:40,056 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 10:32:40,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:40,059 INFO L225 Difference]: With dead ends: 916 [2022-11-20 10:32:40,059 INFO L226 Difference]: Without dead ends: 916 [2022-11-20 10:32:40,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:32:40,060 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:40,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 11 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-11-20 10:32:40,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2022-11-20 10:32:40,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 871. [2022-11-20 10:32:40,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 860 states have (on average 3.9267441860465118) internal successors, (3377), 870 states have internal predecessors, (3377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:40,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 3377 transitions. [2022-11-20 10:32:40,083 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 3377 transitions. Word has length 9 [2022-11-20 10:32:40,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:40,083 INFO L495 AbstractCegarLoop]: Abstraction has 871 states and 3377 transitions. [2022-11-20 10:32:40,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:40,084 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 3377 transitions. [2022-11-20 10:32:40,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 10:32:40,084 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:40,084 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:40,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-11-20 10:32:40,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:40,296 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:40,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:40,296 INFO L85 PathProgramCache]: Analyzing trace with hash 171578469, now seen corresponding path program 3 times [2022-11-20 10:32:40,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:40,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [723655124] [2022-11-20 10:32:40,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:32:40,297 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:40,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:40,298 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:40,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-20 10:32:40,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 10:32:40,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:32:40,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 10:32:40,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:40,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:40,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:40,513 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:40,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [723655124] [2022-11-20 10:32:40,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [723655124] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:40,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:40,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 10:32:40,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895609898] [2022-11-20 10:32:40,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:40,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:32:40,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:40,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:32:40,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:32:40,515 INFO L87 Difference]: Start difference. First operand 871 states and 3377 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:41,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:41,158 INFO L93 Difference]: Finished difference Result 1789 states and 6518 transitions. [2022-11-20 10:32:41,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:32:41,158 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 10:32:41,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:41,162 INFO L225 Difference]: With dead ends: 1789 [2022-11-20 10:32:41,162 INFO L226 Difference]: Without dead ends: 1789 [2022-11-20 10:32:41,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:32:41,163 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 110 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:41,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 15 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 10:32:41,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1789 states. [2022-11-20 10:32:41,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1789 to 861. [2022-11-20 10:32:41,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 850 states have (on average 3.9141176470588235) internal successors, (3327), 860 states have internal predecessors, (3327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:41,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 3327 transitions. [2022-11-20 10:32:41,195 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 3327 transitions. Word has length 9 [2022-11-20 10:32:41,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:41,196 INFO L495 AbstractCegarLoop]: Abstraction has 861 states and 3327 transitions. [2022-11-20 10:32:41,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:41,196 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 3327 transitions. [2022-11-20 10:32:41,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 10:32:41,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:41,197 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:41,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-11-20 10:32:41,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:41,409 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:41,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:41,409 INFO L85 PathProgramCache]: Analyzing trace with hash 171758114, now seen corresponding path program 2 times [2022-11-20 10:32:41,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:41,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899481053] [2022-11-20 10:32:41,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:32:41,410 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:41,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:41,411 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:41,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-20 10:32:41,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:32:41,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:32:41,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:32:41,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:41,729 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:32:41,729 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 [2022-11-20 10:32:41,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:41,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:41,936 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:41,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899481053] [2022-11-20 10:32:41,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [899481053] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:41,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:41,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:32:41,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243579256] [2022-11-20 10:32:41,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:41,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:32:41,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:41,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:32:41,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:32:41,937 INFO L87 Difference]: Start difference. First operand 861 states and 3327 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:42,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:42,136 INFO L93 Difference]: Finished difference Result 869 states and 3353 transitions. [2022-11-20 10:32:42,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:32:42,136 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 10:32:42,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:42,139 INFO L225 Difference]: With dead ends: 869 [2022-11-20 10:32:42,139 INFO L226 Difference]: Without dead ends: 869 [2022-11-20 10:32:42,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:32:42,141 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:42,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 14 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 33 Unchecked, 0.2s Time] [2022-11-20 10:32:42,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-11-20 10:32:42,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 869. [2022-11-20 10:32:42,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 858 states have (on average 3.9079254079254078) internal successors, (3353), 868 states have internal predecessors, (3353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:42,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 3353 transitions. [2022-11-20 10:32:42,164 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 3353 transitions. Word has length 9 [2022-11-20 10:32:42,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:42,165 INFO L495 AbstractCegarLoop]: Abstraction has 869 states and 3353 transitions. [2022-11-20 10:32:42,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:42,165 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 3353 transitions. [2022-11-20 10:32:42,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 10:32:42,166 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:42,166 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:42,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:32:42,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:42,379 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:42,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:42,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1764405049, now seen corresponding path program 1 times [2022-11-20 10:32:42,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:42,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [609692683] [2022-11-20 10:32:42,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:42,380 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:42,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:42,381 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:42,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-20 10:32:42,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:42,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:32:42,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:42,662 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:32:42,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:32:42,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:32:42,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:32:43,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:32:43,461 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:43,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [609692683] [2022-11-20 10:32:43,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [609692683] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:32:43,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:32:43,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:32:43,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284075729] [2022-11-20 10:32:43,462 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:32:43,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:32:43,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:43,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:32:43,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:32:43,463 INFO L87 Difference]: Start difference. First operand 869 states and 3353 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:43,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:43,973 INFO L93 Difference]: Finished difference Result 873 states and 3371 transitions. [2022-11-20 10:32:43,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:32:43,975 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 10:32:43,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:43,977 INFO L225 Difference]: With dead ends: 873 [2022-11-20 10:32:43,977 INFO L226 Difference]: Without dead ends: 873 [2022-11-20 10:32:43,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:32:43,978 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:43,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 27 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 48 Unchecked, 0.4s Time] [2022-11-20 10:32:43,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2022-11-20 10:32:43,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 873. [2022-11-20 10:32:43,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 862 states have (on average 3.910672853828306) internal successors, (3371), 872 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:43,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 3371 transitions. [2022-11-20 10:32:43,999 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 3371 transitions. Word has length 9 [2022-11-20 10:32:43,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:43,999 INFO L495 AbstractCegarLoop]: Abstraction has 873 states and 3371 transitions. [2022-11-20 10:32:43,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:43,999 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 3371 transitions. [2022-11-20 10:32:44,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 10:32:44,000 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:44,000 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:44,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-11-20 10:32:44,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:44,201 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:44,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:44,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1192185991, now seen corresponding path program 1 times [2022-11-20 10:32:44,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:44,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [750011547] [2022-11-20 10:32:44,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:44,202 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:44,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:44,203 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:44,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-20 10:32:44,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:44,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:32:44,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:44,480 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:32:44,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:32:44,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 10:32:44,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:44,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:32:45,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:45,088 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:45,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [750011547] [2022-11-20 10:32:45,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [750011547] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:32:45,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:32:45,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-20 10:32:45,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865242705] [2022-11-20 10:32:45,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:32:45,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:32:45,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:45,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:32:45,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:32:45,090 INFO L87 Difference]: Start difference. First operand 873 states and 3371 transitions. Second operand has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:47,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:47,445 INFO L93 Difference]: Finished difference Result 2474 states and 9309 transitions. [2022-11-20 10:32:47,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 10:32:47,446 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 10:32:47,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:47,452 INFO L225 Difference]: With dead ends: 2474 [2022-11-20 10:32:47,452 INFO L226 Difference]: Without dead ends: 2474 [2022-11-20 10:32:47,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2022-11-20 10:32:47,453 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 634 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:47,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [634 Valid, 109 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-20 10:32:47,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2022-11-20 10:32:47,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 1052. [2022-11-20 10:32:47,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1041 states have (on average 3.7790585975024014) internal successors, (3934), 1051 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:47,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 3934 transitions. [2022-11-20 10:32:47,485 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 3934 transitions. Word has length 9 [2022-11-20 10:32:47,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:47,485 INFO L495 AbstractCegarLoop]: Abstraction has 1052 states and 3934 transitions. [2022-11-20 10:32:47,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:47,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 3934 transitions. [2022-11-20 10:32:47,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 10:32:47,486 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:47,486 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:47,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-11-20 10:32:47,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:47,691 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:47,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:47,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1192186642, now seen corresponding path program 1 times [2022-11-20 10:32:47,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:47,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1481066645] [2022-11-20 10:32:47,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:47,692 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:47,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:47,693 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:47,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-20 10:32:47,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:47,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:32:47,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:47,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:32:47,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:32:48,004 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-20 10:32:48,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-20 10:32:48,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-20 10:32:48,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:48,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:32:49,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:49,299 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:49,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1481066645] [2022-11-20 10:32:49,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1481066645] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:32:49,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:32:49,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:32:49,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263674122] [2022-11-20 10:32:49,300 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:32:49,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:32:49,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:49,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:32:49,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:32:49,301 INFO L87 Difference]: Start difference. First operand 1052 states and 3934 transitions. Second operand has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:50,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:50,337 INFO L93 Difference]: Finished difference Result 1632 states and 6091 transitions. [2022-11-20 10:32:50,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:32:50,337 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 10:32:50,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:50,342 INFO L225 Difference]: With dead ends: 1632 [2022-11-20 10:32:50,342 INFO L226 Difference]: Without dead ends: 1632 [2022-11-20 10:32:50,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:32:50,348 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 269 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:50,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 39 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 119 Invalid, 0 Unknown, 177 Unchecked, 0.6s Time] [2022-11-20 10:32:50,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2022-11-20 10:32:50,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 1047. [2022-11-20 10:32:50,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1036 states have (on average 3.7886100386100385) internal successors, (3925), 1046 states have internal predecessors, (3925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:50,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3925 transitions. [2022-11-20 10:32:50,375 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3925 transitions. Word has length 9 [2022-11-20 10:32:50,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:50,375 INFO L495 AbstractCegarLoop]: Abstraction has 1047 states and 3925 transitions. [2022-11-20 10:32:50,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:50,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3925 transitions. [2022-11-20 10:32:50,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:32:50,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:50,379 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:50,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:50,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:50,592 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:50,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:50,593 INFO L85 PathProgramCache]: Analyzing trace with hash 565768911, now seen corresponding path program 1 times [2022-11-20 10:32:50,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:50,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1131535000] [2022-11-20 10:32:50,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:50,594 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:50,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:50,595 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:50,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-20 10:32:50,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:50,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:32:50,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:50,881 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:32:50,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:32:51,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:51,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:51,101 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:51,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1131535000] [2022-11-20 10:32:51,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1131535000] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:51,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:51,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:32:51,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051725080] [2022-11-20 10:32:51,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:51,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:32:51,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:51,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:32:51,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:32:51,102 INFO L87 Difference]: Start difference. First operand 1047 states and 3925 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:51,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:51,264 INFO L93 Difference]: Finished difference Result 1054 states and 3951 transitions. [2022-11-20 10:32:51,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:32:51,265 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:32:51,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:51,267 INFO L225 Difference]: With dead ends: 1054 [2022-11-20 10:32:51,267 INFO L226 Difference]: Without dead ends: 1054 [2022-11-20 10:32:51,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:32:51,268 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:51,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-11-20 10:32:51,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2022-11-20 10:32:51,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1048. [2022-11-20 10:32:51,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1037 states have (on average 3.7878495660559306) internal successors, (3928), 1047 states have internal predecessors, (3928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:51,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 3928 transitions. [2022-11-20 10:32:51,295 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 3928 transitions. Word has length 10 [2022-11-20 10:32:51,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:51,295 INFO L495 AbstractCegarLoop]: Abstraction has 1048 states and 3928 transitions. [2022-11-20 10:32:51,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:51,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 3928 transitions. [2022-11-20 10:32:51,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:32:51,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:51,296 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:51,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-11-20 10:32:51,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:51,497 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:51,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:51,497 INFO L85 PathProgramCache]: Analyzing trace with hash 565606006, now seen corresponding path program 1 times [2022-11-20 10:32:51,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:51,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [262187185] [2022-11-20 10:32:51,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:51,498 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:51,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:51,499 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:51,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-20 10:32:51,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:51,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:32:51,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:51,836 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:32:51,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:32:52,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:52,028 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:52,028 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:52,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [262187185] [2022-11-20 10:32:52,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [262187185] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:52,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:52,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:32:52,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966347890] [2022-11-20 10:32:52,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:52,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:32:52,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:52,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:32:52,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:32:52,030 INFO L87 Difference]: Start difference. First operand 1048 states and 3928 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:52,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:52,217 INFO L93 Difference]: Finished difference Result 1049 states and 3930 transitions. [2022-11-20 10:32:52,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:32:52,217 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:32:52,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:52,220 INFO L225 Difference]: With dead ends: 1049 [2022-11-20 10:32:52,220 INFO L226 Difference]: Without dead ends: 1049 [2022-11-20 10:32:52,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:32:52,221 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:52,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 13 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2022-11-20 10:32:52,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2022-11-20 10:32:52,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 1049. [2022-11-20 10:32:52,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1038 states have (on average 3.786127167630058) internal successors, (3930), 1048 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:52,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 3930 transitions. [2022-11-20 10:32:52,248 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 3930 transitions. Word has length 10 [2022-11-20 10:32:52,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:52,248 INFO L495 AbstractCegarLoop]: Abstraction has 1049 states and 3930 transitions. [2022-11-20 10:32:52,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:52,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 3930 transitions. [2022-11-20 10:32:52,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:32:52,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:52,249 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:52,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:52,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:52,461 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:52,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:52,462 INFO L85 PathProgramCache]: Analyzing trace with hash 565606161, now seen corresponding path program 2 times [2022-11-20 10:32:52,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:52,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1319192303] [2022-11-20 10:32:52,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:32:52,462 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:52,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:52,463 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:52,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-20 10:32:52,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:32:52,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:32:52,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:32:52,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:52,712 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:32:52,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:32:52,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:52,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:52,929 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:52,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1319192303] [2022-11-20 10:32:52,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1319192303] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:52,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:52,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:32:52,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334941796] [2022-11-20 10:32:52,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:52,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:32:52,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:52,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:32:52,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:32:52,931 INFO L87 Difference]: Start difference. First operand 1049 states and 3930 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:53,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:53,089 INFO L93 Difference]: Finished difference Result 1124 states and 4209 transitions. [2022-11-20 10:32:53,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:32:53,089 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:32:53,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:53,092 INFO L225 Difference]: With dead ends: 1124 [2022-11-20 10:32:53,092 INFO L226 Difference]: Without dead ends: 1124 [2022-11-20 10:32:53,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:32:53,093 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 28 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:53,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 11 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 52 Unchecked, 0.1s Time] [2022-11-20 10:32:53,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2022-11-20 10:32:53,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 1049. [2022-11-20 10:32:53,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1038 states have (on average 3.786127167630058) internal successors, (3930), 1048 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:53,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 3930 transitions. [2022-11-20 10:32:53,113 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 3930 transitions. Word has length 10 [2022-11-20 10:32:53,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:53,113 INFO L495 AbstractCegarLoop]: Abstraction has 1049 states and 3930 transitions. [2022-11-20 10:32:53,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:53,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 3930 transitions. [2022-11-20 10:32:53,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:32:53,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:53,114 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:53,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:32:53,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:53,315 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:53,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:53,315 INFO L85 PathProgramCache]: Analyzing trace with hash 761958487, now seen corresponding path program 1 times [2022-11-20 10:32:53,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:53,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2123031972] [2022-11-20 10:32:53,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:53,316 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:53,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:53,316 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:53,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-20 10:32:53,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:53,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 10:32:53,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:53,627 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:32:53,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:32:53,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:32:53,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:53,781 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:53,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2123031972] [2022-11-20 10:32:53,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2123031972] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:53,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:53,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:32:53,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023281395] [2022-11-20 10:32:53,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:53,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:32:53,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:53,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:32:53,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:32:53,783 INFO L87 Difference]: Start difference. First operand 1049 states and 3930 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:54,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:54,001 INFO L93 Difference]: Finished difference Result 1051 states and 3936 transitions. [2022-11-20 10:32:54,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:32:54,001 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:32:54,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:54,004 INFO L225 Difference]: With dead ends: 1051 [2022-11-20 10:32:54,004 INFO L226 Difference]: Without dead ends: 1051 [2022-11-20 10:32:54,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:32:54,004 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:54,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 11 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 31 Unchecked, 0.2s Time] [2022-11-20 10:32:54,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2022-11-20 10:32:54,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 1051. [2022-11-20 10:32:54,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 1040 states have (on average 3.7846153846153845) internal successors, (3936), 1050 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:54,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 3936 transitions. [2022-11-20 10:32:54,030 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 3936 transitions. Word has length 10 [2022-11-20 10:32:54,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:54,030 INFO L495 AbstractCegarLoop]: Abstraction has 1051 states and 3936 transitions. [2022-11-20 10:32:54,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:54,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 3936 transitions. [2022-11-20 10:32:54,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:32:54,031 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:54,031 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:54,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-20 10:32:54,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:54,235 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:54,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:54,236 INFO L85 PathProgramCache]: Analyzing trace with hash 762047271, now seen corresponding path program 3 times [2022-11-20 10:32:54,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:54,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [7006787] [2022-11-20 10:32:54,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:32:54,236 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:54,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:54,237 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:54,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-20 10:32:54,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 10:32:54,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:32:54,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:32:54,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:54,498 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:32:54,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:32:54,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:54,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:54,722 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:54,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [7006787] [2022-11-20 10:32:54,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [7006787] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:54,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:54,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:32:54,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114405139] [2022-11-20 10:32:54,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:54,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:32:54,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:54,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:32:54,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:32:54,725 INFO L87 Difference]: Start difference. First operand 1051 states and 3936 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:54,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:54,863 INFO L93 Difference]: Finished difference Result 1057 states and 3959 transitions. [2022-11-20 10:32:54,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:32:54,863 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:32:54,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:54,866 INFO L225 Difference]: With dead ends: 1057 [2022-11-20 10:32:54,866 INFO L226 Difference]: Without dead ends: 1057 [2022-11-20 10:32:54,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:32:54,866 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:54,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-20 10:32:54,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2022-11-20 10:32:54,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 1051. [2022-11-20 10:32:54,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 1040 states have (on average 3.7846153846153845) internal successors, (3936), 1050 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:54,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 3936 transitions. [2022-11-20 10:32:54,884 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 3936 transitions. Word has length 10 [2022-11-20 10:32:54,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:54,884 INFO L495 AbstractCegarLoop]: Abstraction has 1051 states and 3936 transitions. [2022-11-20 10:32:54,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:54,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 3936 transitions. [2022-11-20 10:32:54,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:32:54,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:54,885 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:54,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-11-20 10:32:55,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:55,086 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:55,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:55,087 INFO L85 PathProgramCache]: Analyzing trace with hash 756979546, now seen corresponding path program 2 times [2022-11-20 10:32:55,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:55,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1768929643] [2022-11-20 10:32:55,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:32:55,087 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:55,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:55,088 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:55,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-20 10:32:55,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:32:55,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:32:55,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:32:55,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:55,366 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:32:55,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:32:55,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:55,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:55,548 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:55,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1768929643] [2022-11-20 10:32:55,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1768929643] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:55,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:55,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:32:55,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013402685] [2022-11-20 10:32:55,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:55,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:32:55,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:55,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:32:55,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:32:55,550 INFO L87 Difference]: Start difference. First operand 1051 states and 3936 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:55,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:55,727 INFO L93 Difference]: Finished difference Result 1051 states and 3935 transitions. [2022-11-20 10:32:55,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:32:55,728 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:32:55,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:55,730 INFO L225 Difference]: With dead ends: 1051 [2022-11-20 10:32:55,730 INFO L226 Difference]: Without dead ends: 1051 [2022-11-20 10:32:55,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:32:55,731 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:55,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-11-20 10:32:55,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2022-11-20 10:32:55,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 1051. [2022-11-20 10:32:55,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 1040 states have (on average 3.7836538461538463) internal successors, (3935), 1050 states have internal predecessors, (3935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:55,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 3935 transitions. [2022-11-20 10:32:55,749 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 3935 transitions. Word has length 10 [2022-11-20 10:32:55,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:55,749 INFO L495 AbstractCegarLoop]: Abstraction has 1051 states and 3935 transitions. [2022-11-20 10:32:55,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:55,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 3935 transitions. [2022-11-20 10:32:55,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:32:55,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:55,750 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:55,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-11-20 10:32:55,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:55,950 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:55,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:55,951 INFO L85 PathProgramCache]: Analyzing trace with hash 756979701, now seen corresponding path program 4 times [2022-11-20 10:32:55,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:55,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1400981645] [2022-11-20 10:32:55,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:32:55,951 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:55,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:55,952 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:55,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-20 10:32:56,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:32:56,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:32:56,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:32:56,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:56,205 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:32:56,205 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 [2022-11-20 10:32:56,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:56,448 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:56,448 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:56,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1400981645] [2022-11-20 10:32:56,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1400981645] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:56,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:56,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:32:56,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152725732] [2022-11-20 10:32:56,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:56,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:32:56,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:56,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:32:56,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:32:56,449 INFO L87 Difference]: Start difference. First operand 1051 states and 3935 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:56,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:56,601 INFO L93 Difference]: Finished difference Result 1056 states and 3954 transitions. [2022-11-20 10:32:56,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:32:56,602 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:32:56,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:56,604 INFO L225 Difference]: With dead ends: 1056 [2022-11-20 10:32:56,604 INFO L226 Difference]: Without dead ends: 1056 [2022-11-20 10:32:56,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:32:56,605 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:56,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-11-20 10:32:56,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2022-11-20 10:32:56,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 1051. [2022-11-20 10:32:56,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 1040 states have (on average 3.7836538461538463) internal successors, (3935), 1050 states have internal predecessors, (3935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:56,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 3935 transitions. [2022-11-20 10:32:56,620 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 3935 transitions. Word has length 10 [2022-11-20 10:32:56,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:56,620 INFO L495 AbstractCegarLoop]: Abstraction has 1051 states and 3935 transitions. [2022-11-20 10:32:56,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:56,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 3935 transitions. [2022-11-20 10:32:56,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:32:56,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:56,621 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:56,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 10:32:56,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:56,821 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:56,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:56,822 INFO L85 PathProgramCache]: Analyzing trace with hash 14500140, now seen corresponding path program 3 times [2022-11-20 10:32:56,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:56,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1468943867] [2022-11-20 10:32:56,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:32:56,822 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:56,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:56,823 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:56,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-20 10:32:56,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:32:56,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:32:56,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:32:56,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:57,048 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:32:57,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:57,048 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:57,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1468943867] [2022-11-20 10:32:57,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1468943867] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:57,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:57,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:32:57,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385359378] [2022-11-20 10:32:57,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:57,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:32:57,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:57,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:32:57,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:32:57,050 INFO L87 Difference]: Start difference. First operand 1051 states and 3935 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:57,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:57,415 INFO L93 Difference]: Finished difference Result 902 states and 3222 transitions. [2022-11-20 10:32:57,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:32:57,415 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:32:57,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:57,417 INFO L225 Difference]: With dead ends: 902 [2022-11-20 10:32:57,417 INFO L226 Difference]: Without dead ends: 902 [2022-11-20 10:32:57,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:32:57,418 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 57 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:57,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 13 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:32:57,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2022-11-20 10:32:57,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 869. [2022-11-20 10:32:57,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 858 states have (on average 3.6456876456876457) internal successors, (3128), 868 states have internal predecessors, (3128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:57,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 3128 transitions. [2022-11-20 10:32:57,440 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 3128 transitions. Word has length 10 [2022-11-20 10:32:57,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:57,440 INFO L495 AbstractCegarLoop]: Abstraction has 869 states and 3128 transitions. [2022-11-20 10:32:57,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:57,441 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 3128 transitions. [2022-11-20 10:32:57,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:32:57,442 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:57,442 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:57,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Ended with exit code 0 [2022-11-20 10:32:57,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:57,654 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:57,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:57,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1186717867, now seen corresponding path program 1 times [2022-11-20 10:32:57,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:57,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1073932658] [2022-11-20 10:32:57,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:57,656 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 [2022-11-20 10:32:57,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:57,657 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:57,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-20 10:32:57,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:57,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:32:57,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:57,923 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:32:57,924 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 17 treesize of output 44 [2022-11-20 10:32:58,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:58,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:58,136 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:58,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1073932658] [2022-11-20 10:32:58,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1073932658] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:58,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:58,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:32:58,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819074381] [2022-11-20 10:32:58,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:58,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:32:58,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:58,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:32:58,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:32:58,137 INFO L87 Difference]: Start difference. First operand 869 states and 3128 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:58,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:58,279 INFO L93 Difference]: Finished difference Result 881 states and 3178 transitions. [2022-11-20 10:32:58,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:32:58,280 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:32:58,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:58,282 INFO L225 Difference]: With dead ends: 881 [2022-11-20 10:32:58,282 INFO L226 Difference]: Without dead ends: 881 [2022-11-20 10:32:58,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:32:58,283 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:58,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-20 10:32:58,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-11-20 10:32:58,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 875. [2022-11-20 10:32:58,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 864 states have (on average 3.6481481481481484) internal successors, (3152), 874 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:58,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 3152 transitions. [2022-11-20 10:32:58,297 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 3152 transitions. Word has length 10 [2022-11-20 10:32:58,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:58,297 INFO L495 AbstractCegarLoop]: Abstraction has 875 states and 3152 transitions. [2022-11-20 10:32:58,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:58,297 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 3152 transitions. [2022-11-20 10:32:58,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:32:58,298 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:58,298 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:58,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Ended with exit code 0 [2022-11-20 10:32:58,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:58,507 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:58,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:58,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1186587171, now seen corresponding path program 1 times [2022-11-20 10:32:58,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:58,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [619811029] [2022-11-20 10:32:58,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:32:58,515 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:58,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:58,516 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:58,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-20 10:32:58,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:32:58,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:32:58,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:58,794 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:32:58,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:32:58,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:58,998 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:58,998 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:58,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [619811029] [2022-11-20 10:32:58,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [619811029] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:58,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:58,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:32:58,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67979953] [2022-11-20 10:32:58,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:58,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:32:58,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:59,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:32:59,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:32:59,000 INFO L87 Difference]: Start difference. First operand 875 states and 3152 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:59,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:32:59,132 INFO L93 Difference]: Finished difference Result 891 states and 3246 transitions. [2022-11-20 10:32:59,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:32:59,135 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:32:59,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:32:59,138 INFO L225 Difference]: With dead ends: 891 [2022-11-20 10:32:59,139 INFO L226 Difference]: Without dead ends: 891 [2022-11-20 10:32:59,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:32:59,139 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:32:59,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 8 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-20 10:32:59,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2022-11-20 10:32:59,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 881. [2022-11-20 10:32:59,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 870 states have (on average 3.6666666666666665) internal successors, (3190), 880 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:59,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 3190 transitions. [2022-11-20 10:32:59,154 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 3190 transitions. Word has length 10 [2022-11-20 10:32:59,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:32:59,154 INFO L495 AbstractCegarLoop]: Abstraction has 881 states and 3190 transitions. [2022-11-20 10:32:59,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:32:59,154 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 3190 transitions. [2022-11-20 10:32:59,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:32:59,155 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:32:59,155 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:32:59,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-11-20 10:32:59,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:59,355 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:32:59,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:32:59,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1186580227, now seen corresponding path program 2 times [2022-11-20 10:32:59,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:32:59,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [867396202] [2022-11-20 10:32:59,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:32:59,356 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:32:59,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:32:59,357 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:32:59,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-20 10:32:59,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:32:59,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:32:59,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:32:59,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:32:59,635 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:32:59,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:32:59,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:32:59,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:32:59,859 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:32:59,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [867396202] [2022-11-20 10:32:59,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [867396202] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:32:59,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:32:59,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:32:59,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813885936] [2022-11-20 10:32:59,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:32:59,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:32:59,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:32:59,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:32:59,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:32:59,860 INFO L87 Difference]: Start difference. First operand 881 states and 3190 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:00,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:00,002 INFO L93 Difference]: Finished difference Result 887 states and 3210 transitions. [2022-11-20 10:33:00,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:33:00,003 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:33:00,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:00,005 INFO L225 Difference]: With dead ends: 887 [2022-11-20 10:33:00,005 INFO L226 Difference]: Without dead ends: 887 [2022-11-20 10:33:00,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:33:00,006 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:00,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 8 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-11-20 10:33:00,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2022-11-20 10:33:00,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 877. [2022-11-20 10:33:00,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 866 states have (on average 3.6605080831408774) internal successors, (3170), 876 states have internal predecessors, (3170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:00,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 3170 transitions. [2022-11-20 10:33:00,024 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 3170 transitions. Word has length 10 [2022-11-20 10:33:00,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:00,024 INFO L495 AbstractCegarLoop]: Abstraction has 877 states and 3170 transitions. [2022-11-20 10:33:00,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:00,024 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 3170 transitions. [2022-11-20 10:33:00,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:33:00,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:00,024 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:00,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:33:00,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:00,225 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:33:00,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:00,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1186580909, now seen corresponding path program 1 times [2022-11-20 10:33:00,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:33:00,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1352509361] [2022-11-20 10:33:00,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:00,226 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:00,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:33:00,227 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:33:00,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-20 10:33:00,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:00,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:33:00,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:00,517 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:33:00,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:33:00,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:00,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:33:00,705 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:33:00,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1352509361] [2022-11-20 10:33:00,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1352509361] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:33:00,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:33:00,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:33:00,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768135862] [2022-11-20 10:33:00,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:33:00,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:33:00,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:33:00,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:33:00,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:33:00,707 INFO L87 Difference]: Start difference. First operand 877 states and 3170 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:00,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:00,866 INFO L93 Difference]: Finished difference Result 879 states and 3176 transitions. [2022-11-20 10:33:00,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:33:00,866 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:33:00,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:00,868 INFO L225 Difference]: With dead ends: 879 [2022-11-20 10:33:00,868 INFO L226 Difference]: Without dead ends: 879 [2022-11-20 10:33:00,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:33:00,869 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:00,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 15 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2022-11-20 10:33:00,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2022-11-20 10:33:00,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 879. [2022-11-20 10:33:00,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 868 states have (on average 3.6589861751152073) internal successors, (3176), 878 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:00,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 3176 transitions. [2022-11-20 10:33:00,883 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 3176 transitions. Word has length 10 [2022-11-20 10:33:00,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:00,883 INFO L495 AbstractCegarLoop]: Abstraction has 879 states and 3176 transitions. [2022-11-20 10:33:00,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:00,883 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 3176 transitions. [2022-11-20 10:33:00,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:33:00,884 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:00,884 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:00,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Ended with exit code 0 [2022-11-20 10:33:01,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:01,085 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:33:01,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:01,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1186576011, now seen corresponding path program 2 times [2022-11-20 10:33:01,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:33:01,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [612295873] [2022-11-20 10:33:01,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:33:01,085 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:01,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:33:01,086 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:33:01,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-20 10:33:01,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:33:01,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:33:01,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:33:01,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:01,370 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:33:01,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:33:01,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:01,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:33:01,613 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:33:01,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [612295873] [2022-11-20 10:33:01,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [612295873] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:33:01,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:33:01,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:33:01,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690762874] [2022-11-20 10:33:01,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:33:01,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:33:01,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:33:01,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:33:01,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:33:01,615 INFO L87 Difference]: Start difference. First operand 879 states and 3176 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:01,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:01,770 INFO L93 Difference]: Finished difference Result 883 states and 3186 transitions. [2022-11-20 10:33:01,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:33:01,771 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:33:01,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:01,773 INFO L225 Difference]: With dead ends: 883 [2022-11-20 10:33:01,773 INFO L226 Difference]: Without dead ends: 883 [2022-11-20 10:33:01,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:33:01,774 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:01,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-11-20 10:33:01,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-11-20 10:33:01,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 873. [2022-11-20 10:33:01,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 862 states have (on average 3.6357308584686776) internal successors, (3134), 872 states have internal predecessors, (3134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:01,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 3134 transitions. [2022-11-20 10:33:01,790 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 3134 transitions. Word has length 10 [2022-11-20 10:33:01,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:01,790 INFO L495 AbstractCegarLoop]: Abstraction has 873 states and 3134 transitions. [2022-11-20 10:33:01,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:01,790 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 3134 transitions. [2022-11-20 10:33:01,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:33:01,791 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:01,791 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:01,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-11-20 10:33:02,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:02,003 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:33:02,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:02,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1185802499, now seen corresponding path program 2 times [2022-11-20 10:33:02,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:33:02,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1616125280] [2022-11-20 10:33:02,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:33:02,003 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:02,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:33:02,004 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:33:02,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-20 10:33:02,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:33:02,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:33:02,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:33:02,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:02,317 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:33:02,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:33:02,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:02,501 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:33:02,502 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:33:02,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1616125280] [2022-11-20 10:33:02,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1616125280] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:33:02,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:33:02,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:33:02,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424977060] [2022-11-20 10:33:02,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:33:02,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:33:02,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:33:02,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:33:02,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:33:02,503 INFO L87 Difference]: Start difference. First operand 873 states and 3134 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:02,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:02,689 INFO L93 Difference]: Finished difference Result 865 states and 3094 transitions. [2022-11-20 10:33:02,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:33:02,689 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:33:02,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:02,692 INFO L225 Difference]: With dead ends: 865 [2022-11-20 10:33:02,692 INFO L226 Difference]: Without dead ends: 865 [2022-11-20 10:33:02,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:33:02,692 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:02,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 15 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-11-20 10:33:02,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2022-11-20 10:33:02,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 865. [2022-11-20 10:33:02,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 854 states have (on average 3.622950819672131) internal successors, (3094), 864 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:02,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 3094 transitions. [2022-11-20 10:33:02,706 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 3094 transitions. Word has length 10 [2022-11-20 10:33:02,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:02,706 INFO L495 AbstractCegarLoop]: Abstraction has 865 states and 3094 transitions. [2022-11-20 10:33:02,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:02,707 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 3094 transitions. [2022-11-20 10:33:02,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:33:02,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:02,707 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:02,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-20 10:33:02,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:02,908 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:33:02,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:02,908 INFO L85 PathProgramCache]: Analyzing trace with hash 588705760, now seen corresponding path program 1 times [2022-11-20 10:33:02,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:33:02,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1268728959] [2022-11-20 10:33:02,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:02,909 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:02,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:33:02,909 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:33:02,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-20 10:33:03,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:03,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:33:03,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:03,208 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:33:03,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:33:03,498 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:03,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:33:04,792 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:04,792 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:33:04,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1268728959] [2022-11-20 10:33:04,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1268728959] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:33:04,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:33:04,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 10:33:04,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370326717] [2022-11-20 10:33:04,793 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:33:04,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 10:33:04,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:33:04,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 10:33:04,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:33:04,794 INFO L87 Difference]: Start difference. First operand 865 states and 3094 transitions. Second operand has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:10,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:10,403 INFO L93 Difference]: Finished difference Result 1265 states and 4557 transitions. [2022-11-20 10:33:10,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 10:33:10,404 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:33:10,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:10,407 INFO L225 Difference]: With dead ends: 1265 [2022-11-20 10:33:10,407 INFO L226 Difference]: Without dead ends: 1265 [2022-11-20 10:33:10,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2022-11-20 10:33:10,408 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 175 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:10,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 123 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 729 Invalid, 0 Unknown, 139 Unchecked, 4.5s Time] [2022-11-20 10:33:10,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2022-11-20 10:33:10,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 944. [2022-11-20 10:33:10,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 933 states have (on average 3.620578778135048) internal successors, (3378), 943 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:10,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 3378 transitions. [2022-11-20 10:33:10,428 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 3378 transitions. Word has length 10 [2022-11-20 10:33:10,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:10,428 INFO L495 AbstractCegarLoop]: Abstraction has 944 states and 3378 transitions. [2022-11-20 10:33:10,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:10,428 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 3378 transitions. [2022-11-20 10:33:10,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:33:10,428 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:10,429 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:10,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Ended with exit code 0 [2022-11-20 10:33:10,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:10,629 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:33:10,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:10,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1143092364, now seen corresponding path program 1 times [2022-11-20 10:33:10,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:33:10,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [706284296] [2022-11-20 10:33:10,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:10,630 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 [2022-11-20 10:33:10,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:33:10,631 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:33:10,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-20 10:33:10,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:10,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 10:33:10,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:10,927 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:33:10,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:33:11,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:11,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:33:12,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:12,110 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:33:12,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [706284296] [2022-11-20 10:33:12,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [706284296] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:33:12,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:33:12,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:33:12,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136601779] [2022-11-20 10:33:12,111 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:33:12,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:33:12,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:33:12,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:33:12,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:33:12,112 INFO L87 Difference]: Start difference. First operand 944 states and 3378 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:14,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:14,871 INFO L93 Difference]: Finished difference Result 2124 states and 7946 transitions. [2022-11-20 10:33:14,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 10:33:14,872 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:33:14,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:14,877 INFO L225 Difference]: With dead ends: 2124 [2022-11-20 10:33:14,877 INFO L226 Difference]: Without dead ends: 2124 [2022-11-20 10:33:14,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:33:14,877 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 246 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:14,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 40 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 256 Invalid, 0 Unknown, 105 Unchecked, 1.3s Time] [2022-11-20 10:33:14,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2124 states. [2022-11-20 10:33:14,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2124 to 1626. [2022-11-20 10:33:14,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1626 states, 1615 states have (on average 3.8142414860681115) internal successors, (6160), 1625 states have internal predecessors, (6160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:14,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1626 states to 1626 states and 6160 transitions. [2022-11-20 10:33:14,907 INFO L78 Accepts]: Start accepts. Automaton has 1626 states and 6160 transitions. Word has length 10 [2022-11-20 10:33:14,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:14,907 INFO L495 AbstractCegarLoop]: Abstraction has 1626 states and 6160 transitions. [2022-11-20 10:33:14,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:14,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1626 states and 6160 transitions. [2022-11-20 10:33:14,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:33:14,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:14,909 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:14,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-20 10:33:15,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:15,120 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:33:15,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:15,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1143071318, now seen corresponding path program 1 times [2022-11-20 10:33:15,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:33:15,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [313976421] [2022-11-20 10:33:15,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:15,121 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:15,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:33:15,122 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:33:15,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-20 10:33:15,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:15,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:33:15,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:15,428 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:33:15,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:33:15,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:33:15,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:33:16,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:33:16,219 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:33:16,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [313976421] [2022-11-20 10:33:16,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [313976421] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:33:16,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:33:16,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:33:16,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502049298] [2022-11-20 10:33:16,220 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:33:16,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:33:16,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:33:16,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:33:16,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:33:16,221 INFO L87 Difference]: Start difference. First operand 1626 states and 6160 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:16,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:16,686 INFO L93 Difference]: Finished difference Result 1667 states and 6334 transitions. [2022-11-20 10:33:16,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:33:16,687 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:33:16,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:16,691 INFO L225 Difference]: With dead ends: 1667 [2022-11-20 10:33:16,691 INFO L226 Difference]: Without dead ends: 1667 [2022-11-20 10:33:16,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:33:16,692 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:16,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 28 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 65 Unchecked, 0.4s Time] [2022-11-20 10:33:16,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1667 states. [2022-11-20 10:33:16,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1667 to 1656. [2022-11-20 10:33:16,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1645 states have (on average 3.817629179331307) internal successors, (6280), 1655 states have internal predecessors, (6280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:16,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 6280 transitions. [2022-11-20 10:33:16,734 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 6280 transitions. Word has length 10 [2022-11-20 10:33:16,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:16,734 INFO L495 AbstractCegarLoop]: Abstraction has 1656 states and 6280 transitions. [2022-11-20 10:33:16,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:16,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 6280 transitions. [2022-11-20 10:33:16,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:33:16,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:16,735 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:16,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:33:16,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:16,936 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:33:16,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:16,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1138021418, now seen corresponding path program 2 times [2022-11-20 10:33:16,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:33:16,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [614442171] [2022-11-20 10:33:16,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:33:16,937 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:16,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:33:16,938 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:33:16,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-20 10:33:17,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:33:17,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:33:17,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:33:17,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:17,263 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:33:17,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:33:17,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:33:17,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:33:18,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:33:18,027 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:33:18,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [614442171] [2022-11-20 10:33:18,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [614442171] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:33:18,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:33:18,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:33:18,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585769987] [2022-11-20 10:33:18,028 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:33:18,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:33:18,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:33:18,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:33:18,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:33:18,030 INFO L87 Difference]: Start difference. First operand 1656 states and 6280 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:18,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:18,822 INFO L93 Difference]: Finished difference Result 1857 states and 7204 transitions. [2022-11-20 10:33:18,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:33:18,823 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:33:18,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:18,827 INFO L225 Difference]: With dead ends: 1857 [2022-11-20 10:33:18,827 INFO L226 Difference]: Without dead ends: 1857 [2022-11-20 10:33:18,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:33:18,828 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 27 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:18,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 26 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 63 Unchecked, 0.7s Time] [2022-11-20 10:33:18,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1857 states. [2022-11-20 10:33:18,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1857 to 1796. [2022-11-20 10:33:18,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1796 states, 1785 states have (on average 3.876750700280112) internal successors, (6920), 1795 states have internal predecessors, (6920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:18,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1796 states to 1796 states and 6920 transitions. [2022-11-20 10:33:18,860 INFO L78 Accepts]: Start accepts. Automaton has 1796 states and 6920 transitions. Word has length 10 [2022-11-20 10:33:18,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:18,860 INFO L495 AbstractCegarLoop]: Abstraction has 1796 states and 6920 transitions. [2022-11-20 10:33:18,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:18,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1796 states and 6920 transitions. [2022-11-20 10:33:18,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:33:18,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:18,861 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:18,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:33:19,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:19,067 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:33:19,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:19,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1138026068, now seen corresponding path program 3 times [2022-11-20 10:33:19,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:33:19,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1598805237] [2022-11-20 10:33:19,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:33:19,067 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 [2022-11-20 10:33:19,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:33:19,068 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:33:19,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-20 10:33:19,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:33:19,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:33:19,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:33:19,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:19,401 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:33:19,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:33:19,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:33:19,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:33:20,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:33:20,142 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:33:20,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1598805237] [2022-11-20 10:33:20,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1598805237] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:33:20,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:33:20,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:33:20,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278205396] [2022-11-20 10:33:20,142 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:33:20,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:33:20,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:33:20,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:33:20,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:33:20,143 INFO L87 Difference]: Start difference. First operand 1796 states and 6920 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:20,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:20,815 INFO L93 Difference]: Finished difference Result 1947 states and 7604 transitions. [2022-11-20 10:33:20,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:33:20,816 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:33:20,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:20,820 INFO L225 Difference]: With dead ends: 1947 [2022-11-20 10:33:20,820 INFO L226 Difference]: Without dead ends: 1947 [2022-11-20 10:33:20,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:33:20,821 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 49 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:20,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 25 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 34 Unchecked, 0.6s Time] [2022-11-20 10:33:20,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2022-11-20 10:33:20,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 1807. [2022-11-20 10:33:20,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1796 states have (on average 3.8775055679287305) internal successors, (6964), 1806 states have internal predecessors, (6964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:20,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 6964 transitions. [2022-11-20 10:33:20,864 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 6964 transitions. Word has length 10 [2022-11-20 10:33:20,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:20,864 INFO L495 AbstractCegarLoop]: Abstraction has 1807 states and 6964 transitions. [2022-11-20 10:33:20,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:20,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 6964 transitions. [2022-11-20 10:33:20,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:33:20,865 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:20,866 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:20,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 10:33:21,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:21,078 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:33:21,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:21,079 INFO L85 PathProgramCache]: Analyzing trace with hash 358990668, now seen corresponding path program 1 times [2022-11-20 10:33:21,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:33:21,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1621966198] [2022-11-20 10:33:21,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:21,080 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:21,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:33:21,081 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:33:21,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-20 10:33:21,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:21,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:33:21,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:21,382 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:33:21,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:33:21,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:21,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:33:21,637 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:33:21,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1621966198] [2022-11-20 10:33:21,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1621966198] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:33:21,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:33:21,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:33:21,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510310018] [2022-11-20 10:33:21,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:33:21,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:33:21,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:33:21,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:33:21,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:33:21,639 INFO L87 Difference]: Start difference. First operand 1807 states and 6964 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:21,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:21,800 INFO L93 Difference]: Finished difference Result 1812 states and 6983 transitions. [2022-11-20 10:33:21,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:33:21,801 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:33:21,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:21,807 INFO L225 Difference]: With dead ends: 1812 [2022-11-20 10:33:21,807 INFO L226 Difference]: Without dead ends: 1812 [2022-11-20 10:33:21,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:33:21,808 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:21,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-20 10:33:21,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2022-11-20 10:33:21,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1808. [2022-11-20 10:33:21,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1808 states, 1797 states have (on average 3.877573734001113) internal successors, (6968), 1807 states have internal predecessors, (6968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:21,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1808 states to 1808 states and 6968 transitions. [2022-11-20 10:33:21,854 INFO L78 Accepts]: Start accepts. Automaton has 1808 states and 6968 transitions. Word has length 11 [2022-11-20 10:33:21,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:21,854 INFO L495 AbstractCegarLoop]: Abstraction has 1808 states and 6968 transitions. [2022-11-20 10:33:21,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:21,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1808 states and 6968 transitions. [2022-11-20 10:33:21,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:33:21,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:21,856 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:21,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Ended with exit code 0 [2022-11-20 10:33:22,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:22,061 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:33:22,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:22,062 INFO L85 PathProgramCache]: Analyzing trace with hash 358969991, now seen corresponding path program 1 times [2022-11-20 10:33:22,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:33:22,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [547450209] [2022-11-20 10:33:22,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:22,062 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:22,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:33:22,063 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:33:22,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-20 10:33:22,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:22,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:33:22,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:22,355 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:33:22,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:33:22,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:22,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:33:22,564 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:33:22,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [547450209] [2022-11-20 10:33:22,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [547450209] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:33:22,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:33:22,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:33:22,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596508920] [2022-11-20 10:33:22,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:33:22,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:33:22,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:33:22,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:33:22,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:33:22,566 INFO L87 Difference]: Start difference. First operand 1808 states and 6968 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:22,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:22,767 INFO L93 Difference]: Finished difference Result 1809 states and 6970 transitions. [2022-11-20 10:33:22,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:33:22,767 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:33:22,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:22,773 INFO L225 Difference]: With dead ends: 1809 [2022-11-20 10:33:22,773 INFO L226 Difference]: Without dead ends: 1809 [2022-11-20 10:33:22,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:33:22,773 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:22,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 28 Unchecked, 0.2s Time] [2022-11-20 10:33:22,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2022-11-20 10:33:22,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1809. [2022-11-20 10:33:22,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1798 states have (on average 3.8765294771968852) internal successors, (6970), 1808 states have internal predecessors, (6970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:22,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 6970 transitions. [2022-11-20 10:33:22,854 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 6970 transitions. Word has length 11 [2022-11-20 10:33:22,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:22,854 INFO L495 AbstractCegarLoop]: Abstraction has 1809 states and 6970 transitions. [2022-11-20 10:33:22,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:22,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 6970 transitions. [2022-11-20 10:33:22,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:33:22,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:22,855 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:22,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 10:33:23,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:23,065 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:33:23,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:23,066 INFO L85 PathProgramCache]: Analyzing trace with hash 358965558, now seen corresponding path program 2 times [2022-11-20 10:33:23,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:33:23,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1442089110] [2022-11-20 10:33:23,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:33:23,066 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:23,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:33:23,067 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:33:23,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-20 10:33:23,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:33:23,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:33:23,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:33:23,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:23,355 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:33:23,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:33:23,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:23,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:33:23,602 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:33:23,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1442089110] [2022-11-20 10:33:23,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1442089110] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:33:23,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:33:23,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:33:23,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905810433] [2022-11-20 10:33:23,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:33:23,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:33:23,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:33:23,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:33:23,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:33:23,604 INFO L87 Difference]: Start difference. First operand 1809 states and 6970 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:23,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:23,793 INFO L93 Difference]: Finished difference Result 1821 states and 7029 transitions. [2022-11-20 10:33:23,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:33:23,794 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:33:23,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:23,801 INFO L225 Difference]: With dead ends: 1821 [2022-11-20 10:33:23,801 INFO L226 Difference]: Without dead ends: 1821 [2022-11-20 10:33:23,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:33:23,801 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:23,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 10 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-11-20 10:33:23,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2022-11-20 10:33:23,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1809. [2022-11-20 10:33:23,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1798 states have (on average 3.8765294771968852) internal successors, (6970), 1808 states have internal predecessors, (6970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:23,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 6970 transitions. [2022-11-20 10:33:23,894 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 6970 transitions. Word has length 11 [2022-11-20 10:33:23,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:23,894 INFO L495 AbstractCegarLoop]: Abstraction has 1809 states and 6970 transitions. [2022-11-20 10:33:23,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:23,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 6970 transitions. [2022-11-20 10:33:23,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:33:23,896 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:23,896 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:23,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Ended with exit code 0 [2022-11-20 10:33:24,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:24,097 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:33:24,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:24,097 INFO L85 PathProgramCache]: Analyzing trace with hash 353924741, now seen corresponding path program 2 times [2022-11-20 10:33:24,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:33:24,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1489914444] [2022-11-20 10:33:24,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:33:24,098 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:24,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:33:24,099 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:33:24,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-20 10:33:24,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:33:24,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:33:24,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:33:24,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:24,431 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:33:24,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:33:24,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:24,662 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:33:24,662 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:33:24,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1489914444] [2022-11-20 10:33:24,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1489914444] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:33:24,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:33:24,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:33:24,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526020204] [2022-11-20 10:33:24,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:33:24,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:33:24,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:33:24,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:33:24,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:33:24,664 INFO L87 Difference]: Start difference. First operand 1809 states and 6970 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:24,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:24,879 INFO L93 Difference]: Finished difference Result 1810 states and 6972 transitions. [2022-11-20 10:33:24,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:33:24,879 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:33:24,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:24,884 INFO L225 Difference]: With dead ends: 1810 [2022-11-20 10:33:24,884 INFO L226 Difference]: Without dead ends: 1810 [2022-11-20 10:33:24,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:33:24,884 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:24,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 30 Unchecked, 0.2s Time] [2022-11-20 10:33:24,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2022-11-20 10:33:24,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 1809. [2022-11-20 10:33:24,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1798 states have (on average 3.875973303670745) internal successors, (6969), 1808 states have internal predecessors, (6969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:24,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 6969 transitions. [2022-11-20 10:33:24,914 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 6969 transitions. Word has length 11 [2022-11-20 10:33:24,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:24,914 INFO L495 AbstractCegarLoop]: Abstraction has 1809 states and 6969 transitions. [2022-11-20 10:33:24,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:24,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 6969 transitions. [2022-11-20 10:33:24,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:33:24,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:24,915 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:24,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Ended with exit code 0 [2022-11-20 10:33:25,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:25,115 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:33:25,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:25,116 INFO L85 PathProgramCache]: Analyzing trace with hash -2145676784, now seen corresponding path program 3 times [2022-11-20 10:33:25,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:33:25,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [617849194] [2022-11-20 10:33:25,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:33:25,116 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:25,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:33:25,117 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:33:25,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-20 10:33:25,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 10:33:25,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:33:25,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:33:25,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:25,415 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:33:25,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:33:25,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:25,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:33:25,651 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:33:25,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [617849194] [2022-11-20 10:33:25,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [617849194] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:33:25,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:33:25,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:33:25,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347897097] [2022-11-20 10:33:25,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:33:25,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:33:25,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:33:25,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:33:25,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:33:25,652 INFO L87 Difference]: Start difference. First operand 1809 states and 6969 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:25,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:25,808 INFO L93 Difference]: Finished difference Result 1814 states and 6989 transitions. [2022-11-20 10:33:25,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:33:25,809 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:33:25,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:25,813 INFO L225 Difference]: With dead ends: 1814 [2022-11-20 10:33:25,813 INFO L226 Difference]: Without dead ends: 1814 [2022-11-20 10:33:25,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:33:25,814 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:25,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-11-20 10:33:25,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1814 states. [2022-11-20 10:33:25,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 1809. [2022-11-20 10:33:25,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1798 states have (on average 3.875973303670745) internal successors, (6969), 1808 states have internal predecessors, (6969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:25,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 6969 transitions. [2022-11-20 10:33:25,872 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 6969 transitions. Word has length 11 [2022-11-20 10:33:25,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:25,873 INFO L495 AbstractCegarLoop]: Abstraction has 1809 states and 6969 transitions. [2022-11-20 10:33:25,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:25,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 6969 transitions. [2022-11-20 10:33:25,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:33:25,874 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:25,874 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:25,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Ended with exit code 0 [2022-11-20 10:33:26,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:26,086 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:33:26,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:26,086 INFO L85 PathProgramCache]: Analyzing trace with hash -2146335441, now seen corresponding path program 3 times [2022-11-20 10:33:26,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:33:26,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [338212724] [2022-11-20 10:33:26,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:33:26,087 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:26,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:33:26,088 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:33:26,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-20 10:33:26,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:33:26,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:33:26,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:33:26,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:26,445 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:33:26,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:33:26,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:26,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:33:26,637 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:33:26,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [338212724] [2022-11-20 10:33:26,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [338212724] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:33:26,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:33:26,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:33:26,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187076170] [2022-11-20 10:33:26,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:33:26,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:33:26,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:33:26,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:33:26,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:33:26,638 INFO L87 Difference]: Start difference. First operand 1809 states and 6969 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:26,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:26,824 INFO L93 Difference]: Finished difference Result 1811 states and 6974 transitions. [2022-11-20 10:33:26,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:33:26,824 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:33:26,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:26,828 INFO L225 Difference]: With dead ends: 1811 [2022-11-20 10:33:26,828 INFO L226 Difference]: Without dead ends: 1811 [2022-11-20 10:33:26,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:33:26,829 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:26,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-20 10:33:26,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1811 states. [2022-11-20 10:33:26,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1811 to 1810. [2022-11-20 10:33:26,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1799 states have (on average 3.8749305169538633) internal successors, (6971), 1809 states have internal predecessors, (6971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:26,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 6971 transitions. [2022-11-20 10:33:26,856 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 6971 transitions. Word has length 11 [2022-11-20 10:33:26,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:26,856 INFO L495 AbstractCegarLoop]: Abstraction has 1810 states and 6971 transitions. [2022-11-20 10:33:26,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:26,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 6971 transitions. [2022-11-20 10:33:26,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:33:26,857 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:26,858 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:26,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:33:27,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:27,067 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:33:27,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:27,068 INFO L85 PathProgramCache]: Analyzing trace with hash -2146339874, now seen corresponding path program 4 times [2022-11-20 10:33:27,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:33:27,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1192173028] [2022-11-20 10:33:27,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:33:27,068 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:27,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:33:27,069 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:33:27,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-20 10:33:27,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:33:27,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:33:27,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:33:27,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:27,362 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:33:27,362 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 [2022-11-20 10:33:27,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:27,662 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:33:27,662 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:33:27,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1192173028] [2022-11-20 10:33:27,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1192173028] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:33:27,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:33:27,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:33:27,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190654854] [2022-11-20 10:33:27,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:33:27,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:33:27,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:33:27,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:33:27,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:33:27,664 INFO L87 Difference]: Start difference. First operand 1810 states and 6971 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:27,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:27,853 INFO L93 Difference]: Finished difference Result 1883 states and 7295 transitions. [2022-11-20 10:33:27,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:33:27,854 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:33:27,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:27,860 INFO L225 Difference]: With dead ends: 1883 [2022-11-20 10:33:27,860 INFO L226 Difference]: Without dead ends: 1883 [2022-11-20 10:33:27,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:33:27,861 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:27,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 11 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 59 Unchecked, 0.1s Time] [2022-11-20 10:33:27,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2022-11-20 10:33:27,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1809. [2022-11-20 10:33:27,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1798 states have (on average 3.875973303670745) internal successors, (6969), 1808 states have internal predecessors, (6969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:27,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 6969 transitions. [2022-11-20 10:33:27,907 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 6969 transitions. Word has length 11 [2022-11-20 10:33:27,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:27,908 INFO L495 AbstractCegarLoop]: Abstraction has 1809 states and 6969 transitions. [2022-11-20 10:33:27,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:27,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 6969 transitions. [2022-11-20 10:33:27,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:33:27,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:27,909 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:27,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:33:28,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:28,121 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:33:28,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:28,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1991537185, now seen corresponding path program 4 times [2022-11-20 10:33:28,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:33:28,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2056714950] [2022-11-20 10:33:28,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:33:28,122 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:28,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:33:28,123 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:33:28,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-20 10:33:28,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:33:28,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:33:28,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:33:28,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:28,441 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:33:28,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:33:28,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:28,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:33:28,640 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:33:28,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2056714950] [2022-11-20 10:33:28,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2056714950] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:33:28,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:33:28,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:33:28,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884510915] [2022-11-20 10:33:28,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:33:28,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:33:28,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:33:28,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:33:28,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:33:28,642 INFO L87 Difference]: Start difference. First operand 1809 states and 6969 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:28,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:28,841 INFO L93 Difference]: Finished difference Result 1807 states and 6963 transitions. [2022-11-20 10:33:28,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:33:28,842 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:33:28,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:28,847 INFO L225 Difference]: With dead ends: 1807 [2022-11-20 10:33:28,847 INFO L226 Difference]: Without dead ends: 1807 [2022-11-20 10:33:28,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:33:28,847 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:28,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 28 Unchecked, 0.2s Time] [2022-11-20 10:33:28,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2022-11-20 10:33:28,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1807. [2022-11-20 10:33:28,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1796 states have (on average 3.8769487750556793) internal successors, (6963), 1806 states have internal predecessors, (6963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:28,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 6963 transitions. [2022-11-20 10:33:28,882 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 6963 transitions. Word has length 11 [2022-11-20 10:33:28,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:28,883 INFO L495 AbstractCegarLoop]: Abstraction has 1807 states and 6963 transitions. [2022-11-20 10:33:28,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:28,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 6963 transitions. [2022-11-20 10:33:28,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:33:28,884 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:28,884 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:28,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Ended with exit code 0 [2022-11-20 10:33:29,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:29,096 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:33:29,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:29,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1991532752, now seen corresponding path program 5 times [2022-11-20 10:33:29,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:33:29,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1887308378] [2022-11-20 10:33:29,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:33:29,097 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:29,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:33:29,101 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:33:29,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-20 10:33:29,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:33:29,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:33:29,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:33:29,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:29,405 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:33:29,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:33:29,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:29,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:33:29,667 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:33:29,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1887308378] [2022-11-20 10:33:29,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1887308378] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:33:29,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:33:29,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:33:29,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840221604] [2022-11-20 10:33:29,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:33:29,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:33:29,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:33:29,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:33:29,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:33:29,669 INFO L87 Difference]: Start difference. First operand 1807 states and 6963 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:29,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:29,839 INFO L93 Difference]: Finished difference Result 1818 states and 7017 transitions. [2022-11-20 10:33:29,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:33:29,840 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:33:29,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:29,845 INFO L225 Difference]: With dead ends: 1818 [2022-11-20 10:33:29,845 INFO L226 Difference]: Without dead ends: 1818 [2022-11-20 10:33:29,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:33:29,846 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:29,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-11-20 10:33:29,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1818 states. [2022-11-20 10:33:29,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1818 to 1806. [2022-11-20 10:33:29,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1795 states have (on average 3.8779944289693593) internal successors, (6961), 1805 states have internal predecessors, (6961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:29,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 6961 transitions. [2022-11-20 10:33:29,888 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 6961 transitions. Word has length 11 [2022-11-20 10:33:29,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:29,888 INFO L495 AbstractCegarLoop]: Abstraction has 1806 states and 6961 transitions. [2022-11-20 10:33:29,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:29,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 6961 transitions. [2022-11-20 10:33:29,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:33:29,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:29,890 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:29,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Ended with exit code 0 [2022-11-20 10:33:30,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:30,099 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:33:30,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:30,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1866442591, now seen corresponding path program 1 times [2022-11-20 10:33:30,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:33:30,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [590731857] [2022-11-20 10:33:30,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:30,101 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:30,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:33:30,102 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:33:30,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-20 10:33:30,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:30,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:33:30,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:30,430 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:33:30,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:33:30,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:30,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:33:30,679 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:33:30,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [590731857] [2022-11-20 10:33:30,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [590731857] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:33:30,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:33:30,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:33:30,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825827843] [2022-11-20 10:33:30,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:33:30,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:33:30,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:33:30,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:33:30,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:33:30,681 INFO L87 Difference]: Start difference. First operand 1806 states and 6961 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:30,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:30,837 INFO L93 Difference]: Finished difference Result 1860 states and 7251 transitions. [2022-11-20 10:33:30,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:33:30,837 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:33:30,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:30,842 INFO L225 Difference]: With dead ends: 1860 [2022-11-20 10:33:30,842 INFO L226 Difference]: Without dead ends: 1860 [2022-11-20 10:33:30,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:33:30,843 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:30,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 8 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-20 10:33:30,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2022-11-20 10:33:30,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1818. [2022-11-20 10:33:30,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1807 states have (on average 3.8871057000553404) internal successors, (7024), 1817 states have internal predecessors, (7024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:30,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 7024 transitions. [2022-11-20 10:33:30,875 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 7024 transitions. Word has length 11 [2022-11-20 10:33:30,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:30,875 INFO L495 AbstractCegarLoop]: Abstraction has 1818 states and 7024 transitions. [2022-11-20 10:33:30,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:30,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 7024 transitions. [2022-11-20 10:33:30,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:33:30,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:30,876 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:30,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 10:33:31,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:31,088 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:33:31,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:31,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1866448853, now seen corresponding path program 1 times [2022-11-20 10:33:31,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:33:31,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1543580601] [2022-11-20 10:33:31,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:31,089 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:31,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:33:31,090 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:33:31,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-20 10:33:31,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:31,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:33:31,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:31,420 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:33:31,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:33:31,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:31,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:33:31,641 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:33:31,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1543580601] [2022-11-20 10:33:31,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1543580601] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:33:31,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:33:31,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:33:31,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032799885] [2022-11-20 10:33:31,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:33:31,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:33:31,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:33:31,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:33:31,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:33:31,644 INFO L87 Difference]: Start difference. First operand 1818 states and 7024 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:31,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:31,836 INFO L93 Difference]: Finished difference Result 1824 states and 7046 transitions. [2022-11-20 10:33:31,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:33:31,837 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:33:31,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:31,841 INFO L225 Difference]: With dead ends: 1824 [2022-11-20 10:33:31,842 INFO L226 Difference]: Without dead ends: 1824 [2022-11-20 10:33:31,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:33:31,842 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:31,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 15 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2022-11-20 10:33:31,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2022-11-20 10:33:31,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1822. [2022-11-20 10:33:31,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1811 states have (on average 3.8851463279955825) internal successors, (7036), 1821 states have internal predecessors, (7036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:31,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 7036 transitions. [2022-11-20 10:33:31,872 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 7036 transitions. Word has length 11 [2022-11-20 10:33:31,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:31,872 INFO L495 AbstractCegarLoop]: Abstraction has 1822 states and 7036 transitions. [2022-11-20 10:33:31,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:31,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 7036 transitions. [2022-11-20 10:33:31,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:33:31,873 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:31,873 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:31,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 10:33:32,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:32,073 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:33:32,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:32,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1866453751, now seen corresponding path program 2 times [2022-11-20 10:33:32,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:33:32,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [909743455] [2022-11-20 10:33:32,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:33:32,074 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:32,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:33:32,075 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:33:32,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-20 10:33:32,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:33:32,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:33:32,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:33:32,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:32,373 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:33:32,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:33:32,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:32,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:33:32,616 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:33:32,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [909743455] [2022-11-20 10:33:32,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [909743455] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:33:32,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:33:32,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:33:32,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120205857] [2022-11-20 10:33:32,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:33:32,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:33:32,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:33:32,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:33:32,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:33:32,617 INFO L87 Difference]: Start difference. First operand 1822 states and 7036 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:32,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:32,806 INFO L93 Difference]: Finished difference Result 1868 states and 7286 transitions. [2022-11-20 10:33:32,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:33:32,807 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:33:32,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:32,811 INFO L225 Difference]: With dead ends: 1868 [2022-11-20 10:33:32,811 INFO L226 Difference]: Without dead ends: 1868 [2022-11-20 10:33:32,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:33:32,812 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:32,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2022-11-20 10:33:32,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1868 states. [2022-11-20 10:33:32,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1868 to 1830. [2022-11-20 10:33:32,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1830 states, 1819 states have (on average 3.88565145684442) internal successors, (7068), 1829 states have internal predecessors, (7068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:32,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 7068 transitions. [2022-11-20 10:33:32,861 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 7068 transitions. Word has length 11 [2022-11-20 10:33:32,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:32,861 INFO L495 AbstractCegarLoop]: Abstraction has 1830 states and 7068 transitions. [2022-11-20 10:33:32,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:32,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 7068 transitions. [2022-11-20 10:33:32,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:33:32,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:32,863 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:32,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:33:33,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:33,076 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:33:33,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:33,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1870357705, now seen corresponding path program 1 times [2022-11-20 10:33:33,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:33:33,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1467527813] [2022-11-20 10:33:33,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:33,076 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 [2022-11-20 10:33:33,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:33:33,077 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:33:33,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-20 10:33:33,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:33,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:33:33,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:33,376 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:33:33,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:33:33,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:33,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:33:33,632 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:33:33,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1467527813] [2022-11-20 10:33:33,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1467527813] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:33:33,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:33:33,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:33:33,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332553437] [2022-11-20 10:33:33,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:33:33,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:33:33,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:33:33,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:33:33,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:33:33,633 INFO L87 Difference]: Start difference. First operand 1830 states and 7068 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:33,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:33,774 INFO L93 Difference]: Finished difference Result 1864 states and 7251 transitions. [2022-11-20 10:33:33,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:33:33,775 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:33:33,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:33,780 INFO L225 Difference]: With dead ends: 1864 [2022-11-20 10:33:33,780 INFO L226 Difference]: Without dead ends: 1864 [2022-11-20 10:33:33,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:33:33,780 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:33,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2022-11-20 10:33:33,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2022-11-20 10:33:33,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1837. [2022-11-20 10:33:33,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1826 states have (on average 3.886089813800657) internal successors, (7096), 1836 states have internal predecessors, (7096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:33,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 7096 transitions. [2022-11-20 10:33:33,811 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 7096 transitions. Word has length 11 [2022-11-20 10:33:33,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:33,811 INFO L495 AbstractCegarLoop]: Abstraction has 1837 states and 7096 transitions. [2022-11-20 10:33:33,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:33,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 7096 transitions. [2022-11-20 10:33:33,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:33:33,812 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:33,812 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:33,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Forceful destruction successful, exit code 0 [2022-11-20 10:33:34,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:34,012 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:33:34,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:34,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1870501111, now seen corresponding path program 3 times [2022-11-20 10:33:34,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:33:34,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [755906601] [2022-11-20 10:33:34,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:33:34,013 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:34,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:33:34,014 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:33:34,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-20 10:33:34,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 10:33:34,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:33:34,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:33:34,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:34,336 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:33:34,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:33:34,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:34,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:33:34,607 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:33:34,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [755906601] [2022-11-20 10:33:34,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [755906601] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:33:34,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:33:34,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:33:34,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786595526] [2022-11-20 10:33:34,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:33:34,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:33:34,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:33:34,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:33:34,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:33:34,608 INFO L87 Difference]: Start difference. First operand 1837 states and 7096 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:34,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:34,763 INFO L93 Difference]: Finished difference Result 1881 states and 7359 transitions. [2022-11-20 10:33:34,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:33:34,763 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:33:34,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:34,768 INFO L225 Difference]: With dead ends: 1881 [2022-11-20 10:33:34,768 INFO L226 Difference]: Without dead ends: 1881 [2022-11-20 10:33:34,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:33:34,769 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:34,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-11-20 10:33:34,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2022-11-20 10:33:34,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1851. [2022-11-20 10:33:34,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1851 states, 1840 states have (on average 3.9005434782608694) internal successors, (7177), 1850 states have internal predecessors, (7177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:34,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1851 states to 1851 states and 7177 transitions. [2022-11-20 10:33:34,814 INFO L78 Accepts]: Start accepts. Automaton has 1851 states and 7177 transitions. Word has length 11 [2022-11-20 10:33:34,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:34,815 INFO L495 AbstractCegarLoop]: Abstraction has 1851 states and 7177 transitions. [2022-11-20 10:33:34,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:34,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1851 states and 7177 transitions. [2022-11-20 10:33:34,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:33:34,816 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:34,816 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:34,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Ended with exit code 0 [2022-11-20 10:33:35,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:35,028 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:33:35,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:35,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1870500925, now seen corresponding path program 2 times [2022-11-20 10:33:35,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:33:35,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [544184572] [2022-11-20 10:33:35,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:33:35,029 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 [2022-11-20 10:33:35,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:33:35,030 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:33:35,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-20 10:33:35,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:33:35,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:33:35,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:33:35,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:35,342 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:33:35,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:33:35,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:35,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:33:35,579 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:33:35,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [544184572] [2022-11-20 10:33:35,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [544184572] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:33:35,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:33:35,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:33:35,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776390213] [2022-11-20 10:33:35,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:33:35,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:33:35,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:33:35,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:33:35,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:33:35,580 INFO L87 Difference]: Start difference. First operand 1851 states and 7177 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:35,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:35,720 INFO L93 Difference]: Finished difference Result 1881 states and 7307 transitions. [2022-11-20 10:33:35,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:33:35,720 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:33:35,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:35,725 INFO L225 Difference]: With dead ends: 1881 [2022-11-20 10:33:35,725 INFO L226 Difference]: Without dead ends: 1881 [2022-11-20 10:33:35,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:33:35,725 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 9 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:35,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 9 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 49 Unchecked, 0.1s Time] [2022-11-20 10:33:35,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2022-11-20 10:33:35,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1856. [2022-11-20 10:33:35,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1845 states have (on average 3.9008130081300814) internal successors, (7197), 1855 states have internal predecessors, (7197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:35,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 7197 transitions. [2022-11-20 10:33:35,753 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 7197 transitions. Word has length 11 [2022-11-20 10:33:35,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:35,753 INFO L495 AbstractCegarLoop]: Abstraction has 1856 states and 7197 transitions. [2022-11-20 10:33:35,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:35,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 7197 transitions. [2022-11-20 10:33:35,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:33:35,754 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:35,754 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:35,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Ended with exit code 0 [2022-11-20 10:33:35,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:35,955 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:33:35,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:35,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1870715693, now seen corresponding path program 2 times [2022-11-20 10:33:35,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:33:35,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [583307051] [2022-11-20 10:33:35,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:33:35,955 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:35,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:33:35,956 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:33:35,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-20 10:33:36,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:33:36,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:33:36,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:33:36,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:36,304 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:33:36,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:33:36,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:36,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:33:36,482 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:33:36,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [583307051] [2022-11-20 10:33:36,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [583307051] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:33:36,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:33:36,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:33:36,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411605818] [2022-11-20 10:33:36,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:33:36,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:33:36,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:33:36,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:33:36,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:33:36,483 INFO L87 Difference]: Start difference. First operand 1856 states and 7197 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:36,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:36,666 INFO L93 Difference]: Finished difference Result 1858 states and 7201 transitions. [2022-11-20 10:33:36,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:33:36,666 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:33:36,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:36,671 INFO L225 Difference]: With dead ends: 1858 [2022-11-20 10:33:36,671 INFO L226 Difference]: Without dead ends: 1858 [2022-11-20 10:33:36,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:33:36,671 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:36,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 15 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-11-20 10:33:36,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2022-11-20 10:33:36,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1856. [2022-11-20 10:33:36,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1845 states have (on average 3.899728997289973) internal successors, (7195), 1855 states have internal predecessors, (7195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:36,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 7195 transitions. [2022-11-20 10:33:36,727 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 7195 transitions. Word has length 11 [2022-11-20 10:33:36,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:36,728 INFO L495 AbstractCegarLoop]: Abstraction has 1856 states and 7195 transitions. [2022-11-20 10:33:36,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:36,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 7195 transitions. [2022-11-20 10:33:36,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:33:36,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:36,729 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:36,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Ended with exit code 0 [2022-11-20 10:33:36,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:36,929 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:33:36,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:36,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1870720591, now seen corresponding path program 4 times [2022-11-20 10:33:36,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:33:36,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1731772623] [2022-11-20 10:33:36,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:33:36,930 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:36,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:33:36,931 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:33:36,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2022-11-20 10:33:37,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:33:37,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:33:37,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:33:37,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:37,263 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:33:37,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:33:37,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:37,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:33:37,526 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:33:37,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1731772623] [2022-11-20 10:33:37,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1731772623] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:33:37,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:33:37,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:33:37,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912079809] [2022-11-20 10:33:37,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:33:37,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:33:37,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:33:37,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:33:37,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:33:37,527 INFO L87 Difference]: Start difference. First operand 1856 states and 7195 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:37,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:37,705 INFO L93 Difference]: Finished difference Result 1857 states and 7188 transitions. [2022-11-20 10:33:37,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:33:37,706 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:33:37,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:37,711 INFO L225 Difference]: With dead ends: 1857 [2022-11-20 10:33:37,711 INFO L226 Difference]: Without dead ends: 1857 [2022-11-20 10:33:37,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:33:37,711 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:37,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-20 10:33:37,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1857 states. [2022-11-20 10:33:37,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1857 to 1832. [2022-11-20 10:33:37,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1832 states, 1821 states have (on average 3.885777045579352) internal successors, (7076), 1831 states have internal predecessors, (7076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:37,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1832 states to 1832 states and 7076 transitions. [2022-11-20 10:33:37,746 INFO L78 Accepts]: Start accepts. Automaton has 1832 states and 7076 transitions. Word has length 11 [2022-11-20 10:33:37,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:37,746 INFO L495 AbstractCegarLoop]: Abstraction has 1832 states and 7076 transitions. [2022-11-20 10:33:37,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:37,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1832 states and 7076 transitions. [2022-11-20 10:33:37,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:33:37,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:37,747 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:37,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Ended with exit code 0 [2022-11-20 10:33:37,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:37,948 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:33:37,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:37,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1870846885, now seen corresponding path program 3 times [2022-11-20 10:33:37,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:33:37,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [4220151] [2022-11-20 10:33:37,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:33:37,949 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:37,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:33:37,949 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:33:37,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-20 10:33:38,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 10:33:38,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:33:38,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:33:38,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:38,272 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:33:38,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:33:38,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:38,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:33:38,524 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:33:38,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [4220151] [2022-11-20 10:33:38,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [4220151] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:33:38,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:33:38,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:33:38,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236957109] [2022-11-20 10:33:38,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:33:38,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:33:38,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:33:38,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:33:38,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:33:38,526 INFO L87 Difference]: Start difference. First operand 1832 states and 7076 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:38,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:38,690 INFO L93 Difference]: Finished difference Result 1835 states and 7084 transitions. [2022-11-20 10:33:38,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:33:38,690 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:33:38,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:38,711 INFO L225 Difference]: With dead ends: 1835 [2022-11-20 10:33:38,711 INFO L226 Difference]: Without dead ends: 1835 [2022-11-20 10:33:38,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:33:38,712 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:38,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 8 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-20 10:33:38,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1835 states. [2022-11-20 10:33:38,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1835 to 1820. [2022-11-20 10:33:38,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1820 states, 1809 states have (on average 3.876727473742399) internal successors, (7013), 1819 states have internal predecessors, (7013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:38,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 7013 transitions. [2022-11-20 10:33:38,754 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 7013 transitions. Word has length 11 [2022-11-20 10:33:38,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:38,755 INFO L495 AbstractCegarLoop]: Abstraction has 1820 states and 7013 transitions. [2022-11-20 10:33:38,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:38,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 7013 transitions. [2022-11-20 10:33:38,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:33:38,756 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:38,756 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:38,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Forceful destruction successful, exit code 0 [2022-11-20 10:33:38,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:38,968 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:33:38,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:38,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1894846403, now seen corresponding path program 3 times [2022-11-20 10:33:38,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:33:38,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2039475775] [2022-11-20 10:33:38,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:33:38,969 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:38,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:33:38,971 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:33:39,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-20 10:33:39,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:33:39,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:33:39,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:33:39,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:39,336 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:33:39,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:33:39,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:39,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:33:39,532 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:33:39,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2039475775] [2022-11-20 10:33:39,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2039475775] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:33:39,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:33:39,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:33:39,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896677957] [2022-11-20 10:33:39,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:33:39,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:33:39,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:33:39,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:33:39,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:33:39,533 INFO L87 Difference]: Start difference. First operand 1820 states and 7013 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:39,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:39,735 INFO L93 Difference]: Finished difference Result 1812 states and 6977 transitions. [2022-11-20 10:33:39,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:33:39,736 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:33:39,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:39,740 INFO L225 Difference]: With dead ends: 1812 [2022-11-20 10:33:39,740 INFO L226 Difference]: Without dead ends: 1812 [2022-11-20 10:33:39,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:33:39,741 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:39,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 14 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 32 Unchecked, 0.2s Time] [2022-11-20 10:33:39,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2022-11-20 10:33:39,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1812. [2022-11-20 10:33:39,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1801 states have (on average 3.8739589117157136) internal successors, (6977), 1811 states have internal predecessors, (6977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:39,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 6977 transitions. [2022-11-20 10:33:39,774 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 6977 transitions. Word has length 11 [2022-11-20 10:33:39,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:39,774 INFO L495 AbstractCegarLoop]: Abstraction has 1812 states and 6977 transitions. [2022-11-20 10:33:39,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:39,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 6977 transitions. [2022-11-20 10:33:39,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:33:39,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:39,776 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:39,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Ended with exit code 0 [2022-11-20 10:33:39,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:39,976 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:33:39,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:39,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1060779082, now seen corresponding path program 1 times [2022-11-20 10:33:39,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:33:39,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [68553530] [2022-11-20 10:33:39,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:39,977 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:39,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:33:39,978 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:33:39,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-20 10:33:40,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:40,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:33:40,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:40,344 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:33:40,344 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 [2022-11-20 10:33:40,689 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:40,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:33:42,220 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:42,220 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:33:42,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [68553530] [2022-11-20 10:33:42,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [68553530] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:33:42,220 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:33:42,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 10:33:42,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522329480] [2022-11-20 10:33:42,221 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:33:42,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 10:33:42,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:33:42,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 10:33:42,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:33:42,222 INFO L87 Difference]: Start difference. First operand 1812 states and 6977 transitions. Second operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:48,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:48,013 INFO L93 Difference]: Finished difference Result 2455 states and 9693 transitions. [2022-11-20 10:33:48,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 10:33:48,014 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:33:48,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:48,021 INFO L225 Difference]: With dead ends: 2455 [2022-11-20 10:33:48,021 INFO L226 Difference]: Without dead ends: 2455 [2022-11-20 10:33:48,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-11-20 10:33:48,021 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 229 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:48,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 117 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 698 Invalid, 0 Unknown, 124 Unchecked, 4.6s Time] [2022-11-20 10:33:48,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2022-11-20 10:33:48,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 1961. [2022-11-20 10:33:48,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1950 states have (on average 4.015384615384615) internal successors, (7830), 1960 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:48,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 7830 transitions. [2022-11-20 10:33:48,059 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 7830 transitions. Word has length 11 [2022-11-20 10:33:48,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:48,060 INFO L495 AbstractCegarLoop]: Abstraction has 1961 states and 7830 transitions. [2022-11-20 10:33:48,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:48,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 7830 transitions. [2022-11-20 10:33:48,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:33:48,061 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:48,061 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:48,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Ended with exit code 0 [2022-11-20 10:33:48,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:48,261 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:33:48,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:48,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1056353679, now seen corresponding path program 1 times [2022-11-20 10:33:48,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:33:48,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [75953937] [2022-11-20 10:33:48,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:33:48,262 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:48,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:33:48,263 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:33:48,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-20 10:33:48,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:33:48,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:33:48,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:48,611 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:33:48,611 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 [2022-11-20 10:33:48,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:33:48,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:33:49,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:33:49,503 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:33:49,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [75953937] [2022-11-20 10:33:49,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [75953937] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:33:49,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:33:49,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:33:49,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457546531] [2022-11-20 10:33:49,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:33:49,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:33:49,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:33:49,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:33:49,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:33:49,505 INFO L87 Difference]: Start difference. First operand 1961 states and 7830 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:50,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:33:50,019 INFO L93 Difference]: Finished difference Result 2051 states and 8296 transitions. [2022-11-20 10:33:50,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:33:50,021 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:33:50,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:33:50,026 INFO L225 Difference]: With dead ends: 2051 [2022-11-20 10:33:50,026 INFO L226 Difference]: Without dead ends: 2051 [2022-11-20 10:33:50,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:33:50,027 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:33:50,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 29 Unchecked, 0.4s Time] [2022-11-20 10:33:50,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2022-11-20 10:33:50,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 2029. [2022-11-20 10:33:50,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2029 states, 2018 states have (on average 4.046085232903865) internal successors, (8165), 2028 states have internal predecessors, (8165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:50,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2029 states to 2029 states and 8165 transitions. [2022-11-20 10:33:50,071 INFO L78 Accepts]: Start accepts. Automaton has 2029 states and 8165 transitions. Word has length 11 [2022-11-20 10:33:50,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:33:50,071 INFO L495 AbstractCegarLoop]: Abstraction has 2029 states and 8165 transitions. [2022-11-20 10:33:50,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:33:50,072 INFO L276 IsEmpty]: Start isEmpty. Operand 2029 states and 8165 transitions. [2022-11-20 10:33:50,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:33:50,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:33:50,072 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:33:50,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Ended with exit code 0 [2022-11-20 10:33:50,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:50,273 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:33:50,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:33:50,273 INFO L85 PathProgramCache]: Analyzing trace with hash 783722782, now seen corresponding path program 2 times [2022-11-20 10:33:50,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:33:50,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [669858502] [2022-11-20 10:33:50,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:33:50,274 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:33:50,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:33:50,275 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:33:50,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2022-11-20 10:33:50,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:33:50,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:33:50,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 10:33:50,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:33:50,675 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:33:50,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:33:51,075 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:51,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:33:52,311 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:33:52,311 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:33:52,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [669858502] [2022-11-20 10:33:52,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [669858502] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:33:52,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:33:52,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 10:33:52,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237226692] [2022-11-20 10:33:52,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:33:52,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 10:33:52,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:33:52,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 10:33:52,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-11-20 10:33:52,312 INFO L87 Difference]: Start difference. First operand 2029 states and 8165 transitions. Second operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:03,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:03,917 INFO L93 Difference]: Finished difference Result 2982 states and 11483 transitions. [2022-11-20 10:34:03,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 10:34:03,919 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:34:03,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:03,926 INFO L225 Difference]: With dead ends: 2982 [2022-11-20 10:34:03,926 INFO L226 Difference]: Without dead ends: 2982 [2022-11-20 10:34:03,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=293, Invalid=699, Unknown=0, NotChecked=0, Total=992 [2022-11-20 10:34:03,927 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 574 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:03,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [574 Valid, 142 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1053 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2022-11-20 10:34:03,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2982 states. [2022-11-20 10:34:03,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2982 to 1535. [2022-11-20 10:34:03,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1524 states have (on average 3.7992125984251968) internal successors, (5790), 1534 states have internal predecessors, (5790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:03,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 5790 transitions. [2022-11-20 10:34:03,981 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 5790 transitions. Word has length 11 [2022-11-20 10:34:03,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:34:03,981 INFO L495 AbstractCegarLoop]: Abstraction has 1535 states and 5790 transitions. [2022-11-20 10:34:03,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:03,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 5790 transitions. [2022-11-20 10:34:03,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:34:03,982 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:03,982 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:03,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Ended with exit code 0 [2022-11-20 10:34:04,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:04,183 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:34:04,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:04,183 INFO L85 PathProgramCache]: Analyzing trace with hash 646533369, now seen corresponding path program 2 times [2022-11-20 10:34:04,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:34:04,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [564880549] [2022-11-20 10:34:04,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:34:04,184 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 [2022-11-20 10:34:04,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:34:04,185 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:34:04,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-20 10:34:04,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:34:04,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:34:04,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:34:04,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:04,554 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:34:04,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:34:04,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:34:04,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:34:05,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:34:05,387 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:34:05,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [564880549] [2022-11-20 10:34:05,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [564880549] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:34:05,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:34:05,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:34:05,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906321889] [2022-11-20 10:34:05,388 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:34:05,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:34:05,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:34:05,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:34:05,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:34:05,389 INFO L87 Difference]: Start difference. First operand 1535 states and 5790 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:05,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:05,971 INFO L93 Difference]: Finished difference Result 1569 states and 5952 transitions. [2022-11-20 10:34:05,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:34:05,972 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:34:05,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:05,976 INFO L225 Difference]: With dead ends: 1569 [2022-11-20 10:34:05,976 INFO L226 Difference]: Without dead ends: 1569 [2022-11-20 10:34:05,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:34:05,976 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:05,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 21 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 29 Unchecked, 0.5s Time] [2022-11-20 10:34:05,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2022-11-20 10:34:05,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1557. [2022-11-20 10:34:05,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1557 states, 1546 states have (on average 3.813712807244502) internal successors, (5896), 1556 states have internal predecessors, (5896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:06,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 5896 transitions. [2022-11-20 10:34:06,003 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 5896 transitions. Word has length 11 [2022-11-20 10:34:06,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:34:06,003 INFO L495 AbstractCegarLoop]: Abstraction has 1557 states and 5896 transitions. [2022-11-20 10:34:06,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:06,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 5896 transitions. [2022-11-20 10:34:06,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:34:06,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:06,004 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:06,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Ended with exit code 0 [2022-11-20 10:34:06,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:06,207 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:34:06,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:06,208 INFO L85 PathProgramCache]: Analyzing trace with hash 646535229, now seen corresponding path program 3 times [2022-11-20 10:34:06,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:34:06,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1199403567] [2022-11-20 10:34:06,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:34:06,208 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:06,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:34:06,210 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:34:06,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-20 10:34:06,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:34:06,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:34:06,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:34:06,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:06,613 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:34:06,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:34:06,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:34:06,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:34:07,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:34:07,445 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:34:07,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1199403567] [2022-11-20 10:34:07,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1199403567] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:34:07,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:34:07,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:34:07,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375610387] [2022-11-20 10:34:07,446 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:34:07,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:34:07,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:34:07,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:34:07,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:34:07,447 INFO L87 Difference]: Start difference. First operand 1557 states and 5896 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:08,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:08,058 INFO L93 Difference]: Finished difference Result 1615 states and 6180 transitions. [2022-11-20 10:34:08,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:34:08,059 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:34:08,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:08,063 INFO L225 Difference]: With dead ends: 1615 [2022-11-20 10:34:08,063 INFO L226 Difference]: Without dead ends: 1615 [2022-11-20 10:34:08,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:34:08,063 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:08,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 21 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 31 Unchecked, 0.5s Time] [2022-11-20 10:34:08,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2022-11-20 10:34:08,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 1582. [2022-11-20 10:34:08,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1571 states have (on average 3.8408656906429024) internal successors, (6034), 1581 states have internal predecessors, (6034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:08,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 6034 transitions. [2022-11-20 10:34:08,087 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 6034 transitions. Word has length 11 [2022-11-20 10:34:08,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:34:08,087 INFO L495 AbstractCegarLoop]: Abstraction has 1582 states and 6034 transitions. [2022-11-20 10:34:08,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:08,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 6034 transitions. [2022-11-20 10:34:08,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:34:08,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:08,089 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:08,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Ended with exit code 0 [2022-11-20 10:34:08,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:08,289 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:34:08,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:08,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1076116411, now seen corresponding path program 1 times [2022-11-20 10:34:08,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:34:08,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1323794686] [2022-11-20 10:34:08,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:08,290 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:08,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:34:08,291 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:34:08,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-20 10:34:08,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:08,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:34:08,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:08,621 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:34:08,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:34:08,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:34:08,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:34:09,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:34:09,418 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:34:09,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1323794686] [2022-11-20 10:34:09,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1323794686] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:34:09,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:34:09,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:34:09,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867751032] [2022-11-20 10:34:09,418 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:34:09,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:34:09,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:34:09,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:34:09,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:34:09,419 INFO L87 Difference]: Start difference. First operand 1582 states and 6034 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:09,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:09,917 INFO L93 Difference]: Finished difference Result 1623 states and 6239 transitions. [2022-11-20 10:34:09,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:34:09,918 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:34:09,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:09,940 INFO L225 Difference]: With dead ends: 1623 [2022-11-20 10:34:09,940 INFO L226 Difference]: Without dead ends: 1623 [2022-11-20 10:34:09,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:34:09,941 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:09,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 24 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 44 Unchecked, 0.4s Time] [2022-11-20 10:34:09,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2022-11-20 10:34:09,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1598. [2022-11-20 10:34:09,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1598 states, 1587 states have (on average 3.8525519848771266) internal successors, (6114), 1597 states have internal predecessors, (6114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:09,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1598 states to 1598 states and 6114 transitions. [2022-11-20 10:34:09,983 INFO L78 Accepts]: Start accepts. Automaton has 1598 states and 6114 transitions. Word has length 11 [2022-11-20 10:34:09,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:34:09,983 INFO L495 AbstractCegarLoop]: Abstraction has 1598 states and 6114 transitions. [2022-11-20 10:34:09,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:09,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1598 states and 6114 transitions. [2022-11-20 10:34:09,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:34:09,985 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:09,985 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:10,008 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Ended with exit code 0 [2022-11-20 10:34:10,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:10,191 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:34:10,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:10,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1075470991, now seen corresponding path program 2 times [2022-11-20 10:34:10,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:34:10,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [107719038] [2022-11-20 10:34:10,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:34:10,193 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:10,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:34:10,194 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:34:10,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-20 10:34:10,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:34:10,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:34:10,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:34:10,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:10,577 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:34:10,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:34:10,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:34:10,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:34:11,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:34:11,339 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:34:11,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [107719038] [2022-11-20 10:34:11,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [107719038] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:34:11,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:34:11,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:34:11,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512955808] [2022-11-20 10:34:11,340 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:34:11,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:34:11,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:34:11,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:34:11,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:34:11,344 INFO L87 Difference]: Start difference. First operand 1598 states and 6114 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:12,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:12,009 INFO L93 Difference]: Finished difference Result 1762 states and 6860 transitions. [2022-11-20 10:34:12,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:34:12,010 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:34:12,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:12,014 INFO L225 Difference]: With dead ends: 1762 [2022-11-20 10:34:12,014 INFO L226 Difference]: Without dead ends: 1762 [2022-11-20 10:34:12,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:34:12,015 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 25 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:12,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 22 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 0 Unknown, 55 Unchecked, 0.6s Time] [2022-11-20 10:34:12,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1762 states. [2022-11-20 10:34:12,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1762 to 1590. [2022-11-20 10:34:12,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1579 states have (on average 3.851804939835339) internal successors, (6082), 1589 states have internal predecessors, (6082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:12,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 6082 transitions. [2022-11-20 10:34:12,051 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 6082 transitions. Word has length 11 [2022-11-20 10:34:12,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:34:12,051 INFO L495 AbstractCegarLoop]: Abstraction has 1590 states and 6082 transitions. [2022-11-20 10:34:12,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:12,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 6082 transitions. [2022-11-20 10:34:12,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:34:12,052 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:12,052 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:12,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Ended with exit code 0 [2022-11-20 10:34:12,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:12,252 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:34:12,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:12,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1075338001, now seen corresponding path program 3 times [2022-11-20 10:34:12,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:34:12,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1291510531] [2022-11-20 10:34:12,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:34:12,253 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:12,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:34:12,255 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:34:12,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-20 10:34:12,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:34:12,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:34:12,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:34:12,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:12,615 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:34:12,615 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 [2022-11-20 10:34:12,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:34:12,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:34:13,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:34:13,425 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:34:13,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1291510531] [2022-11-20 10:34:13,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1291510531] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:34:13,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:34:13,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:34:13,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699590519] [2022-11-20 10:34:13,425 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:34:13,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:34:13,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:34:13,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:34:13,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:34:13,426 INFO L87 Difference]: Start difference. First operand 1590 states and 6082 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:14,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:14,213 INFO L93 Difference]: Finished difference Result 1866 states and 7336 transitions. [2022-11-20 10:34:14,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:34:14,214 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:34:14,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:14,219 INFO L225 Difference]: With dead ends: 1866 [2022-11-20 10:34:14,219 INFO L226 Difference]: Without dead ends: 1866 [2022-11-20 10:34:14,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:34:14,219 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 44 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:14,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 20 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 51 Unchecked, 0.7s Time] [2022-11-20 10:34:14,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2022-11-20 10:34:14,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1642. [2022-11-20 10:34:14,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1631 states have (on average 3.8749233599019006) internal successors, (6320), 1641 states have internal predecessors, (6320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:14,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 6320 transitions. [2022-11-20 10:34:14,248 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 6320 transitions. Word has length 11 [2022-11-20 10:34:14,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:34:14,249 INFO L495 AbstractCegarLoop]: Abstraction has 1642 states and 6320 transitions. [2022-11-20 10:34:14,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:14,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 6320 transitions. [2022-11-20 10:34:14,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:34:14,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:14,250 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:14,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Ended with exit code 0 [2022-11-20 10:34:14,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:14,450 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:34:14,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:14,450 INFO L85 PathProgramCache]: Analyzing trace with hash 918923719, now seen corresponding path program 2 times [2022-11-20 10:34:14,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:34:14,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1806551750] [2022-11-20 10:34:14,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:34:14,451 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:14,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:34:14,452 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:34:14,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-20 10:34:14,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:34:14,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:34:14,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:34:14,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:14,834 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:34:14,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:34:15,056 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:34:15,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:34:16,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:16,096 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:34:16,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1806551750] [2022-11-20 10:34:16,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1806551750] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:34:16,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:34:16,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2022-11-20 10:34:16,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863785132] [2022-11-20 10:34:16,097 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:34:16,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:34:16,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:34:16,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:34:16,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:34:16,098 INFO L87 Difference]: Start difference. First operand 1642 states and 6320 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:19,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:19,048 INFO L93 Difference]: Finished difference Result 1850 states and 6784 transitions. [2022-11-20 10:34:19,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 10:34:19,050 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:34:19,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:19,054 INFO L225 Difference]: With dead ends: 1850 [2022-11-20 10:34:19,054 INFO L226 Difference]: Without dead ends: 1850 [2022-11-20 10:34:19,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:34:19,054 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 77 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:19,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 109 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 471 Invalid, 0 Unknown, 149 Unchecked, 2.6s Time] [2022-11-20 10:34:19,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2022-11-20 10:34:19,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 1673. [2022-11-20 10:34:19,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1662 states have (on average 3.884476534296029) internal successors, (6456), 1672 states have internal predecessors, (6456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:19,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 6456 transitions. [2022-11-20 10:34:19,081 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 6456 transitions. Word has length 11 [2022-11-20 10:34:19,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:34:19,082 INFO L495 AbstractCegarLoop]: Abstraction has 1673 states and 6456 transitions. [2022-11-20 10:34:19,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:19,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 6456 transitions. [2022-11-20 10:34:19,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:34:19,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:19,083 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:19,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Ended with exit code 0 [2022-11-20 10:34:19,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:19,283 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:34:19,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:19,284 INFO L85 PathProgramCache]: Analyzing trace with hash 918935251, now seen corresponding path program 4 times [2022-11-20 10:34:19,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:34:19,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [688314765] [2022-11-20 10:34:19,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:34:19,284 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:19,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:34:19,285 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:34:19,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2022-11-20 10:34:19,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:34:19,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:34:19,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:34:19,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:19,625 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:34:19,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:34:19,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:34:19,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:34:20,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:34:20,478 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:34:20,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [688314765] [2022-11-20 10:34:20,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [688314765] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:34:20,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:34:20,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:34:20,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019138328] [2022-11-20 10:34:20,479 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:34:20,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:34:20,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:34:20,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:34:20,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:34:20,480 INFO L87 Difference]: Start difference. First operand 1673 states and 6456 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:21,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:21,377 INFO L93 Difference]: Finished difference Result 1983 states and 7863 transitions. [2022-11-20 10:34:21,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:34:21,378 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:34:21,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:21,383 INFO L225 Difference]: With dead ends: 1983 [2022-11-20 10:34:21,383 INFO L226 Difference]: Without dead ends: 1983 [2022-11-20 10:34:21,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:34:21,384 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 35 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:21,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 25 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 138 Invalid, 0 Unknown, 114 Unchecked, 0.8s Time] [2022-11-20 10:34:21,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2022-11-20 10:34:21,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1631. [2022-11-20 10:34:21,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1620 states have (on average 3.873456790123457) internal successors, (6275), 1630 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:21,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 6275 transitions. [2022-11-20 10:34:21,432 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 6275 transitions. Word has length 11 [2022-11-20 10:34:21,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:34:21,433 INFO L495 AbstractCegarLoop]: Abstraction has 1631 states and 6275 transitions. [2022-11-20 10:34:21,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:21,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 6275 transitions. [2022-11-20 10:34:21,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:34:21,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:21,435 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:21,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Forceful destruction successful, exit code 0 [2022-11-20 10:34:21,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:21,635 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:34:21,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:21,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1756051288, now seen corresponding path program 1 times [2022-11-20 10:34:21,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:34:21,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1883922958] [2022-11-20 10:34:21,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:21,636 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:21,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:34:21,637 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:34:21,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-20 10:34:21,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:21,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:34:21,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:21,964 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:34:21,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:34:22,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:22,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:34:22,241 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:34:22,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1883922958] [2022-11-20 10:34:22,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1883922958] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:34:22,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:34:22,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:34:22,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852809900] [2022-11-20 10:34:22,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:34:22,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:34:22,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:34:22,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:34:22,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:34:22,242 INFO L87 Difference]: Start difference. First operand 1631 states and 6275 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:22,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:22,420 INFO L93 Difference]: Finished difference Result 1654 states and 6366 transitions. [2022-11-20 10:34:22,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:34:22,421 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 12 [2022-11-20 10:34:22,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:22,425 INFO L225 Difference]: With dead ends: 1654 [2022-11-20 10:34:22,425 INFO L226 Difference]: Without dead ends: 1654 [2022-11-20 10:34:22,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:34:22,425 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:22,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 8 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-20 10:34:22,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2022-11-20 10:34:22,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1632. [2022-11-20 10:34:22,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1621 states have (on average 3.873534855027761) internal successors, (6279), 1631 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:22,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 6279 transitions. [2022-11-20 10:34:22,452 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 6279 transitions. Word has length 12 [2022-11-20 10:34:22,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:34:22,452 INFO L495 AbstractCegarLoop]: Abstraction has 1632 states and 6279 transitions. [2022-11-20 10:34:22,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:22,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 6279 transitions. [2022-11-20 10:34:22,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:34:22,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:22,453 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:22,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:34:22,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:22,654 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:34:22,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:22,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1756181984, now seen corresponding path program 1 times [2022-11-20 10:34:22,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:34:22,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1747451394] [2022-11-20 10:34:22,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:22,654 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:22,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:34:22,655 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:34:22,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-11-20 10:34:22,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:22,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:34:22,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:22,993 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:34:22,994 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 [2022-11-20 10:34:23,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:23,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:34:23,253 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:34:23,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1747451394] [2022-11-20 10:34:23,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1747451394] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:34:23,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:34:23,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:34:23,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65320889] [2022-11-20 10:34:23,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:34:23,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:34:23,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:34:23,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:34:23,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:34:23,254 INFO L87 Difference]: Start difference. First operand 1632 states and 6279 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:23,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:23,408 INFO L93 Difference]: Finished difference Result 1657 states and 6404 transitions. [2022-11-20 10:34:23,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:34:23,409 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 12 [2022-11-20 10:34:23,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:23,428 INFO L225 Difference]: With dead ends: 1657 [2022-11-20 10:34:23,428 INFO L226 Difference]: Without dead ends: 1657 [2022-11-20 10:34:23,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:34:23,429 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:23,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 8 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-20 10:34:23,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2022-11-20 10:34:23,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1633. [2022-11-20 10:34:23,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1633 states, 1622 states have (on average 3.873612823674476) internal successors, (6283), 1632 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:23,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1633 states to 1633 states and 6283 transitions. [2022-11-20 10:34:23,456 INFO L78 Accepts]: Start accepts. Automaton has 1633 states and 6283 transitions. Word has length 12 [2022-11-20 10:34:23,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:34:23,456 INFO L495 AbstractCegarLoop]: Abstraction has 1633 states and 6283 transitions. [2022-11-20 10:34:23,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:23,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1633 states and 6283 transitions. [2022-11-20 10:34:23,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:34:23,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:23,457 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:23,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 10:34:23,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:23,658 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:34:23,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:23,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1756188928, now seen corresponding path program 2 times [2022-11-20 10:34:23,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:34:23,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1746891437] [2022-11-20 10:34:23,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:34:23,659 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:23,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:34:23,660 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:34:23,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2022-11-20 10:34:23,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:34:23,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:34:23,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:34:23,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:23,988 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:34:23,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:34:24,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:24,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:34:24,244 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:34:24,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1746891437] [2022-11-20 10:34:24,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1746891437] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:34:24,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:34:24,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:34:24,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418239948] [2022-11-20 10:34:24,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:34:24,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:34:24,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:34:24,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:34:24,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:34:24,245 INFO L87 Difference]: Start difference. First operand 1633 states and 6283 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:24,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:24,408 INFO L93 Difference]: Finished difference Result 1655 states and 6370 transitions. [2022-11-20 10:34:24,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:34:24,408 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 12 [2022-11-20 10:34:24,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:24,413 INFO L225 Difference]: With dead ends: 1655 [2022-11-20 10:34:24,413 INFO L226 Difference]: Without dead ends: 1655 [2022-11-20 10:34:24,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:34:24,413 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:24,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-20 10:34:24,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1655 states. [2022-11-20 10:34:24,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1655 to 1634. [2022-11-20 10:34:24,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1623 states have (on average 3.873690696241528) internal successors, (6287), 1633 states have internal predecessors, (6287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:24,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 6287 transitions. [2022-11-20 10:34:24,443 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 6287 transitions. Word has length 12 [2022-11-20 10:34:24,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:34:24,443 INFO L495 AbstractCegarLoop]: Abstraction has 1634 states and 6287 transitions. [2022-11-20 10:34:24,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:24,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 6287 transitions. [2022-11-20 10:34:24,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:34:24,444 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:24,444 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:24,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Forceful destruction successful, exit code 0 [2022-11-20 10:34:24,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:24,645 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:34:24,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:24,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1756188246, now seen corresponding path program 1 times [2022-11-20 10:34:24,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:34:24,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [208779356] [2022-11-20 10:34:24,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:34:24,645 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:24,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:34:24,646 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:34:24,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2022-11-20 10:34:24,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:34:24,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:34:24,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:25,001 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:34:25,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:34:25,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:25,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:34:25,219 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:34:25,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [208779356] [2022-11-20 10:34:25,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [208779356] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:34:25,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:34:25,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:34:25,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481169049] [2022-11-20 10:34:25,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:34:25,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:34:25,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:34:25,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:34:25,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:34:25,220 INFO L87 Difference]: Start difference. First operand 1634 states and 6287 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:25,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:25,410 INFO L93 Difference]: Finished difference Result 1638 states and 6302 transitions. [2022-11-20 10:34:25,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:34:25,410 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 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 12 [2022-11-20 10:34:25,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:25,414 INFO L225 Difference]: With dead ends: 1638 [2022-11-20 10:34:25,415 INFO L226 Difference]: Without dead ends: 1638 [2022-11-20 10:34:25,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:34:25,415 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:25,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 15 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-11-20 10:34:25,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1638 states. [2022-11-20 10:34:25,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1638 to 1635. [2022-11-20 10:34:25,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1635 states, 1624 states have (on average 3.872536945812808) internal successors, (6289), 1634 states have internal predecessors, (6289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:25,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 6289 transitions. [2022-11-20 10:34:25,449 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 6289 transitions. Word has length 12 [2022-11-20 10:34:25,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:34:25,449 INFO L495 AbstractCegarLoop]: Abstraction has 1635 states and 6289 transitions. [2022-11-20 10:34:25,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:25,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 6289 transitions. [2022-11-20 10:34:25,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:34:25,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:25,451 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:25,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Forceful destruction successful, exit code 0 [2022-11-20 10:34:25,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:25,663 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:34:25,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:25,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1756193144, now seen corresponding path program 2 times [2022-11-20 10:34:25,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:34:25,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [640182613] [2022-11-20 10:34:25,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:34:25,664 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:25,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:34:25,665 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:34:25,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-20 10:34:25,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:34:25,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:34:25,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:34:25,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:25,993 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:34:25,994 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 [2022-11-20 10:34:26,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:26,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:34:26,244 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:34:26,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [640182613] [2022-11-20 10:34:26,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [640182613] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:34:26,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:34:26,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:34:26,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445036195] [2022-11-20 10:34:26,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:34:26,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:34:26,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:34:26,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:34:26,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:34:26,246 INFO L87 Difference]: Start difference. First operand 1635 states and 6289 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:26,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:26,407 INFO L93 Difference]: Finished difference Result 1651 states and 6361 transitions. [2022-11-20 10:34:26,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:34:26,407 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 12 [2022-11-20 10:34:26,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:26,412 INFO L225 Difference]: With dead ends: 1651 [2022-11-20 10:34:26,412 INFO L226 Difference]: Without dead ends: 1651 [2022-11-20 10:34:26,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:34:26,412 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:26,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-11-20 10:34:26,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1651 states. [2022-11-20 10:34:26,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1651 to 1634. [2022-11-20 10:34:26,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1623 states have (on average 3.8724584103512014) internal successors, (6285), 1633 states have internal predecessors, (6285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:26,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 6285 transitions. [2022-11-20 10:34:26,438 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 6285 transitions. Word has length 12 [2022-11-20 10:34:26,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:34:26,438 INFO L495 AbstractCegarLoop]: Abstraction has 1634 states and 6285 transitions. [2022-11-20 10:34:26,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:26,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 6285 transitions. [2022-11-20 10:34:26,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:34:26,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:26,439 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:26,452 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 10:34:26,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:26,640 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:34:26,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:26,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1756967338, now seen corresponding path program 3 times [2022-11-20 10:34:26,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:34:26,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [754784669] [2022-11-20 10:34:26,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:34:26,640 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:26,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:34:26,641 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:34:26,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2022-11-20 10:34:26,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 10:34:26,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:34:26,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:34:26,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:27,006 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:34:27,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:34:27,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:27,289 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:34:27,289 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:34:27,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [754784669] [2022-11-20 10:34:27,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [754784669] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:34:27,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:34:27,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:34:27,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894425573] [2022-11-20 10:34:27,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:34:27,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:34:27,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:34:27,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:34:27,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:34:27,291 INFO L87 Difference]: Start difference. First operand 1634 states and 6285 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:27,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:27,464 INFO L93 Difference]: Finished difference Result 1662 states and 6405 transitions. [2022-11-20 10:34:27,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:34:27,465 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 12 [2022-11-20 10:34:27,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:27,469 INFO L225 Difference]: With dead ends: 1662 [2022-11-20 10:34:27,469 INFO L226 Difference]: Without dead ends: 1662 [2022-11-20 10:34:27,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:34:27,470 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:27,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-11-20 10:34:27,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2022-11-20 10:34:27,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1635. [2022-11-20 10:34:27,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1635 states, 1624 states have (on average 3.872536945812808) internal successors, (6289), 1634 states have internal predecessors, (6289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:27,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 6289 transitions. [2022-11-20 10:34:27,498 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 6289 transitions. Word has length 12 [2022-11-20 10:34:27,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:34:27,498 INFO L495 AbstractCegarLoop]: Abstraction has 1635 states and 6289 transitions. [2022-11-20 10:34:27,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:27,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 6289 transitions. [2022-11-20 10:34:27,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:34:27,500 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:27,500 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:27,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 10:34:27,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:27,700 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:34:27,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:27,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1756966656, now seen corresponding path program 2 times [2022-11-20 10:34:27,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:34:27,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [202876070] [2022-11-20 10:34:27,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:34:27,701 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:27,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:34:27,702 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:34:27,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2022-11-20 10:34:27,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:34:27,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:34:27,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:34:27,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:28,074 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:34:28,074 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 [2022-11-20 10:34:28,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:28,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:34:28,278 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:34:28,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [202876070] [2022-11-20 10:34:28,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [202876070] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:34:28,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:34:28,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:34:28,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243610736] [2022-11-20 10:34:28,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:34:28,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:34:28,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:34:28,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:34:28,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:34:28,279 INFO L87 Difference]: Start difference. First operand 1635 states and 6289 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:28,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:28,474 INFO L93 Difference]: Finished difference Result 1670 states and 6418 transitions. [2022-11-20 10:34:28,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:34:28,474 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 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 12 [2022-11-20 10:34:28,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:28,478 INFO L225 Difference]: With dead ends: 1670 [2022-11-20 10:34:28,479 INFO L226 Difference]: Without dead ends: 1670 [2022-11-20 10:34:28,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:34:28,479 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:28,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 15 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 47 Unchecked, 0.2s Time] [2022-11-20 10:34:28,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2022-11-20 10:34:28,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1646. [2022-11-20 10:34:28,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1646 states, 1635 states have (on average 3.8678899082568807) internal successors, (6324), 1645 states have internal predecessors, (6324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:28,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 6324 transitions. [2022-11-20 10:34:28,511 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 6324 transitions. Word has length 12 [2022-11-20 10:34:28,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:34:28,511 INFO L495 AbstractCegarLoop]: Abstraction has 1646 states and 6324 transitions. [2022-11-20 10:34:28,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:28,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 6324 transitions. [2022-11-20 10:34:28,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 10:34:28,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:34:28,512 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:34:28,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Forceful destruction successful, exit code 0 [2022-11-20 10:34:28,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:28,713 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:34:28,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:34:28,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1756971554, now seen corresponding path program 3 times [2022-11-20 10:34:28,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:34:28,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1522505364] [2022-11-20 10:34:28,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:34:28,714 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:34:28,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:34:28,715 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:34:28,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (95)] Waiting until timeout for monitored process [2022-11-20 10:34:28,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 10:34:28,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:34:28,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:34:28,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:34:29,089 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:34:29,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:34:29,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:34:29,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:34:29,387 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:34:29,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1522505364] [2022-11-20 10:34:29,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1522505364] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:34:29,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:34:29,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:34:29,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147743438] [2022-11-20 10:34:29,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:34:29,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:34:29,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:34:29,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:34:29,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:34:29,389 INFO L87 Difference]: Start difference. First operand 1646 states and 6324 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:34:29,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:34:29,577 INFO L93 Difference]: Finished difference Result 1672 states and 6455 transitions. [2022-11-20 10:34:29,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:34:29,578 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 12 [2022-11-20 10:34:29,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:34:29,582 INFO L225 Difference]: With dead ends: 1672 [2022-11-20 10:34:29,583 INFO L226 Difference]: Without dead ends: 1672 [2022-11-20 10:34:29,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:34:29,583 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:34:29,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] WARNING: YOUR LOGFILE WAS TOO LONG, SOME LINES IN THE MIDDLE WERE REMOVED. [2022-11-20 10:37:36,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 14 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2022-11-20 10:37:36,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2022-11-20 10:37:36,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 2310. [2022-11-20 10:37:36,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2310 states, 2303 states have (on average 4.240121580547113) internal successors, (9765), 2309 states have internal predecessors, (9765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:37:36,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2310 states to 2310 states and 9765 transitions. [2022-11-20 10:37:36,997 INFO L78 Accepts]: Start accepts. Automaton has 2310 states and 9765 transitions. Word has length 13 [2022-11-20 10:37:36,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:37:36,997 INFO L495 AbstractCegarLoop]: Abstraction has 2310 states and 9765 transitions. [2022-11-20 10:37:36,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:37:36,997 INFO L276 IsEmpty]: Start isEmpty. Operand 2310 states and 9765 transitions. [2022-11-20 10:37:36,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:37:36,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:37:36,998 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:37:37,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (169)] Ended with exit code 0 [2022-11-20 10:37:37,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:37:37,199 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:37:37,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:37:37,199 INFO L85 PathProgramCache]: Analyzing trace with hash -2117352031, now seen corresponding path program 3 times [2022-11-20 10:37:37,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:37:37,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1558969715] [2022-11-20 10:37:37,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:37:37,200 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:37:37,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:37:37,201 INFO L229 MonitoredProcess]: Starting monitored process 170 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:37:37,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (170)] Waiting until timeout for monitored process [2022-11-20 10:37:37,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:37:37,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:37:37,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:37:37,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:37:37,730 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:37:37,731 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 [2022-11-20 10:37:37,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:37:37,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:37:37,946 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:37:37,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1558969715] [2022-11-20 10:37:37,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1558969715] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:37:37,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:37:37,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:37:37,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024002382] [2022-11-20 10:37:37,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:37:37,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:37:37,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:37:37,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:37:37,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:37:37,947 INFO L87 Difference]: Start difference. First operand 2310 states and 9765 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:37:38,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:37:38,136 INFO L93 Difference]: Finished difference Result 2322 states and 9801 transitions. [2022-11-20 10:37:38,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:37:38,137 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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 13 [2022-11-20 10:37:38,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:37:38,143 INFO L225 Difference]: With dead ends: 2322 [2022-11-20 10:37:38,143 INFO L226 Difference]: Without dead ends: 2322 [2022-11-20 10:37:38,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:37:38,143 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:37:38,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 15 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-20 10:37:38,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2022-11-20 10:37:38,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 2312. [2022-11-20 10:37:38,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2312 states, 2305 states have (on average 4.239045553145337) internal successors, (9771), 2311 states have internal predecessors, (9771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:37:38,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 9771 transitions. [2022-11-20 10:37:38,185 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 9771 transitions. Word has length 13 [2022-11-20 10:37:38,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:37:38,185 INFO L495 AbstractCegarLoop]: Abstraction has 2312 states and 9771 transitions. [2022-11-20 10:37:38,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:37:38,185 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 9771 transitions. [2022-11-20 10:37:38,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:37:38,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:37:38,187 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:37:38,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (170)] Ended with exit code 0 [2022-11-20 10:37:38,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:37:38,387 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:37:38,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:37:38,387 INFO L85 PathProgramCache]: Analyzing trace with hash 2039807865, now seen corresponding path program 4 times [2022-11-20 10:37:38,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:37:38,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [713531648] [2022-11-20 10:37:38,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:37:38,388 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:37:38,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:37:38,389 INFO L229 MonitoredProcess]: Starting monitored process 171 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:37:38,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (171)] Waiting until timeout for monitored process [2022-11-20 10:37:38,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:37:38,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:37:38,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:37:38,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:37:38,861 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:37:38,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:37:39,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:37:39,069 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:37:39,069 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:37:39,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [713531648] [2022-11-20 10:37:39,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [713531648] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:37:39,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:37:39,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:37:39,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297528071] [2022-11-20 10:37:39,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:37:39,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:37:39,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:37:39,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:37:39,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:37:39,070 INFO L87 Difference]: Start difference. First operand 2312 states and 9771 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:37:39,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:37:39,266 INFO L93 Difference]: Finished difference Result 2310 states and 9762 transitions. [2022-11-20 10:37:39,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:37:39,267 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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 13 [2022-11-20 10:37:39,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:37:39,273 INFO L225 Difference]: With dead ends: 2310 [2022-11-20 10:37:39,273 INFO L226 Difference]: Without dead ends: 2310 [2022-11-20 10:37:39,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:37:39,273 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:37:39,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 15 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-11-20 10:37:39,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2022-11-20 10:37:39,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 2294. [2022-11-20 10:37:39,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2294 states, 2287 states have (on average 4.247485789243551) internal successors, (9714), 2293 states have internal predecessors, (9714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:37:39,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2294 states to 2294 states and 9714 transitions. [2022-11-20 10:37:39,314 INFO L78 Accepts]: Start accepts. Automaton has 2294 states and 9714 transitions. Word has length 13 [2022-11-20 10:37:39,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:37:39,314 INFO L495 AbstractCegarLoop]: Abstraction has 2294 states and 9714 transitions. [2022-11-20 10:37:39,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:37:39,314 INFO L276 IsEmpty]: Start isEmpty. Operand 2294 states and 9714 transitions. [2022-11-20 10:37:39,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:37:39,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:37:39,316 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:37:39,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 10:37:39,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:37:39,516 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:37:39,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:37:39,516 INFO L85 PathProgramCache]: Analyzing trace with hash -89430867, now seen corresponding path program 1 times [2022-11-20 10:37:39,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:37:39,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [157374515] [2022-11-20 10:37:39,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:37:39,517 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:37:39,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:37:39,518 INFO L229 MonitoredProcess]: Starting monitored process 172 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:37:39,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (172)] Waiting until timeout for monitored process [2022-11-20 10:37:39,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:37:39,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:37:39,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:37:40,016 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:37:40,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:37:40,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:37:40,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:37:40,952 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:37:40,952 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:37:40,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [157374515] [2022-11-20 10:37:40,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [157374515] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:37:40,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:37:40,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:37:40,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119800105] [2022-11-20 10:37:40,953 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:37:40,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:37:40,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:37:40,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:37:40,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:37:40,953 INFO L87 Difference]: Start difference. First operand 2294 states and 9714 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:37:41,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:37:41,449 INFO L93 Difference]: Finished difference Result 2360 states and 9995 transitions. [2022-11-20 10:37:41,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:37:41,451 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:37:41,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:37:41,456 INFO L225 Difference]: With dead ends: 2360 [2022-11-20 10:37:41,456 INFO L226 Difference]: Without dead ends: 2360 [2022-11-20 10:37:41,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:37:41,457 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:37:41,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 26 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 27 Unchecked, 0.4s Time] [2022-11-20 10:37:41,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2360 states. [2022-11-20 10:37:41,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2360 to 2300. [2022-11-20 10:37:41,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2300 states, 2293 states have (on average 4.24378543392935) internal successors, (9731), 2299 states have internal predecessors, (9731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:37:41,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 9731 transitions. [2022-11-20 10:37:41,496 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 9731 transitions. Word has length 13 [2022-11-20 10:37:41,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:37:41,496 INFO L495 AbstractCegarLoop]: Abstraction has 2300 states and 9731 transitions. [2022-11-20 10:37:41,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:37:41,496 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 9731 transitions. [2022-11-20 10:37:41,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:37:41,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:37:41,498 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:37:41,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (172)] Ended with exit code 0 [2022-11-20 10:37:41,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:37:41,698 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:37:41,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:37:41,698 INFO L85 PathProgramCache]: Analyzing trace with hash -94480767, now seen corresponding path program 2 times [2022-11-20 10:37:41,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:37:41,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1727185795] [2022-11-20 10:37:41,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:37:41,699 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:37:41,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:37:41,700 INFO L229 MonitoredProcess]: Starting monitored process 173 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:37:41,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (173)] Waiting until timeout for monitored process [2022-11-20 10:37:42,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:37:42,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:37:42,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:37:42,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:37:42,211 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:37:42,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:37:42,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:37:42,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:37:43,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:37:43,081 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:37:43,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1727185795] [2022-11-20 10:37:43,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1727185795] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:37:43,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:37:43,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:37:43,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046004282] [2022-11-20 10:37:43,081 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:37:43,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:37:43,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:37:43,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:37:43,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:37:43,082 INFO L87 Difference]: Start difference. First operand 2300 states and 9731 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:37:43,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:37:43,761 INFO L93 Difference]: Finished difference Result 2692 states and 11563 transitions. [2022-11-20 10:37:43,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:37:43,763 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:37:43,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:37:43,770 INFO L225 Difference]: With dead ends: 2692 [2022-11-20 10:37:43,770 INFO L226 Difference]: Without dead ends: 2692 [2022-11-20 10:37:43,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:37:43,770 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 37 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:37:43,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 20 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 36 Unchecked, 0.6s Time] [2022-11-20 10:37:43,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2692 states. [2022-11-20 10:37:43,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2692 to 2367. [2022-11-20 10:37:43,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2367 states, 2360 states have (on average 4.248728813559322) internal successors, (10027), 2366 states have internal predecessors, (10027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:37:43,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2367 states to 2367 states and 10027 transitions. [2022-11-20 10:37:43,812 INFO L78 Accepts]: Start accepts. Automaton has 2367 states and 10027 transitions. Word has length 13 [2022-11-20 10:37:43,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:37:43,812 INFO L495 AbstractCegarLoop]: Abstraction has 2367 states and 10027 transitions. [2022-11-20 10:37:43,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:37:43,812 INFO L276 IsEmpty]: Start isEmpty. Operand 2367 states and 10027 transitions. [2022-11-20 10:37:43,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:37:43,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:37:43,813 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:37:43,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 10:37:44,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:37:44,014 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:37:44,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:37:44,014 INFO L85 PathProgramCache]: Analyzing trace with hash -94476117, now seen corresponding path program 3 times [2022-11-20 10:37:44,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:37:44,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2002947505] [2022-11-20 10:37:44,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:37:44,015 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:37:44,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:37:44,016 INFO L229 MonitoredProcess]: Starting monitored process 174 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:37:44,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (174)] Waiting until timeout for monitored process [2022-11-20 10:37:44,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:37:44,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:37:44,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:37:44,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:37:44,550 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:37:44,551 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 [2022-11-20 10:37:44,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:37:44,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:37:45,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:37:45,427 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:37:45,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2002947505] [2022-11-20 10:37:45,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2002947505] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:37:45,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:37:45,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:37:45,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961389469] [2022-11-20 10:37:45,428 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:37:45,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:37:45,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:37:45,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:37:45,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:37:45,428 INFO L87 Difference]: Start difference. First operand 2367 states and 10027 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:37:46,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:37:46,334 INFO L93 Difference]: Finished difference Result 3162 states and 13606 transitions. [2022-11-20 10:37:46,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:37:46,335 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:37:46,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:37:46,343 INFO L225 Difference]: With dead ends: 3162 [2022-11-20 10:37:46,343 INFO L226 Difference]: Without dead ends: 3162 [2022-11-20 10:37:46,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:37:46,344 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 77 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:37:46,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 25 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 142 Invalid, 0 Unknown, 109 Unchecked, 0.8s Time] [2022-11-20 10:37:46,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3162 states. [2022-11-20 10:37:46,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3162 to 2336. [2022-11-20 10:37:46,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2336 states, 2329 states have (on average 4.218119364534135) internal successors, (9824), 2335 states have internal predecessors, (9824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:37:46,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2336 states to 2336 states and 9824 transitions. [2022-11-20 10:37:46,405 INFO L78 Accepts]: Start accepts. Automaton has 2336 states and 9824 transitions. Word has length 13 [2022-11-20 10:37:46,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:37:46,406 INFO L495 AbstractCegarLoop]: Abstraction has 2336 states and 9824 transitions. [2022-11-20 10:37:46,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:37:46,406 INFO L276 IsEmpty]: Start isEmpty. Operand 2336 states and 9824 transitions. [2022-11-20 10:37:46,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:37:46,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:37:46,407 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:37:46,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (174)] Ended with exit code 0 [2022-11-20 10:37:46,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:37:46,608 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:37:46,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:37:46,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1700890243, now seen corresponding path program 1 times [2022-11-20 10:37:46,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:37:46,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1908802871] [2022-11-20 10:37:46,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:37:46,609 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:37:46,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:37:46,610 INFO L229 MonitoredProcess]: Starting monitored process 175 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:37:46,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (175)] Waiting until timeout for monitored process [2022-11-20 10:37:46,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:37:46,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:37:46,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:37:47,117 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:37:47,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:37:47,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:37:47,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:37:48,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:37:48,061 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:37:48,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1908802871] [2022-11-20 10:37:48,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1908802871] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:37:48,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:37:48,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:37:48,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335308084] [2022-11-20 10:37:48,061 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:37:48,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:37:48,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:37:48,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:37:48,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:37:48,062 INFO L87 Difference]: Start difference. First operand 2336 states and 9824 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:37:48,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:37:48,269 INFO L93 Difference]: Finished difference Result 2439 states and 10361 transitions. [2022-11-20 10:37:48,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:37:48,270 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:37:48,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:37:48,276 INFO L225 Difference]: With dead ends: 2439 [2022-11-20 10:37:48,276 INFO L226 Difference]: Without dead ends: 2439 [2022-11-20 10:37:48,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:37:48,276 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:37:48,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 20 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-11-20 10:37:48,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2439 states. [2022-11-20 10:37:48,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2439 to 2357. [2022-11-20 10:37:48,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2357 states, 2350 states have (on average 4.229787234042553) internal successors, (9940), 2356 states have internal predecessors, (9940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:37:48,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2357 states to 2357 states and 9940 transitions. [2022-11-20 10:37:48,322 INFO L78 Accepts]: Start accepts. Automaton has 2357 states and 9940 transitions. Word has length 13 [2022-11-20 10:37:48,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:37:48,323 INFO L495 AbstractCegarLoop]: Abstraction has 2357 states and 9940 transitions. [2022-11-20 10:37:48,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:37:48,323 INFO L276 IsEmpty]: Start isEmpty. Operand 2357 states and 9940 transitions. [2022-11-20 10:37:48,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:37:48,324 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:37:48,324 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:37:48,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 10:37:48,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:37:48,537 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:37:48,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:37:48,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1700230997, now seen corresponding path program 4 times [2022-11-20 10:37:48,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:37:48,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1256370189] [2022-11-20 10:37:48,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:37:48,538 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 [2022-11-20 10:37:48,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:37:48,540 INFO L229 MonitoredProcess]: Starting monitored process 176 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:37:48,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (176)] Waiting until timeout for monitored process [2022-11-20 10:37:48,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:37:48,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:37:48,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:37:48,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:37:49,042 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:37:49,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:37:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:37:49,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:37:49,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:37:49,962 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:37:49,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1256370189] [2022-11-20 10:37:49,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1256370189] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:37:49,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:37:49,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:37:49,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809215242] [2022-11-20 10:37:49,962 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:37:49,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:37:49,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:37:49,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:37:49,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:37:49,963 INFO L87 Difference]: Start difference. First operand 2357 states and 9940 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:37:50,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:37:50,458 INFO L93 Difference]: Finished difference Result 2438 states and 10261 transitions. [2022-11-20 10:37:50,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:37:50,460 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:37:50,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:37:50,466 INFO L225 Difference]: With dead ends: 2438 [2022-11-20 10:37:50,466 INFO L226 Difference]: Without dead ends: 2438 [2022-11-20 10:37:50,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:37:50,467 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:37:50,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 21 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 31 Unchecked, 0.4s Time] [2022-11-20 10:37:50,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2022-11-20 10:37:50,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 2361. [2022-11-20 10:37:50,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2361 states, 2354 states have (on average 4.229396771452846) internal successors, (9956), 2360 states have internal predecessors, (9956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:37:50,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 9956 transitions. [2022-11-20 10:37:50,506 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 9956 transitions. Word has length 13 [2022-11-20 10:37:50,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:37:50,506 INFO L495 AbstractCegarLoop]: Abstraction has 2361 states and 9956 transitions. [2022-11-20 10:37:50,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:37:50,507 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 9956 transitions. [2022-11-20 10:37:50,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:37:50,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:37:50,508 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:37:50,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 10:37:50,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:37:50,709 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:37:50,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:37:50,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1700248667, now seen corresponding path program 5 times [2022-11-20 10:37:50,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:37:50,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2095922835] [2022-11-20 10:37:50,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:37:50,709 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:37:50,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:37:50,710 INFO L229 MonitoredProcess]: Starting monitored process 177 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:37:50,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (177)] Waiting until timeout for monitored process [2022-11-20 10:37:51,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:37:51,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:37:51,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:37:51,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:37:51,302 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:37:51,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:37:51,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:37:51,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:37:52,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:37:52,281 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:37:52,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2095922835] [2022-11-20 10:37:52,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2095922835] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:37:52,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:37:52,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:37:52,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798109874] [2022-11-20 10:37:52,282 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:37:52,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:37:52,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:37:52,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:37:52,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:37:52,282 INFO L87 Difference]: Start difference. First operand 2361 states and 9956 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:37:52,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:37:52,850 INFO L93 Difference]: Finished difference Result 2432 states and 10243 transitions. [2022-11-20 10:37:52,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:37:52,851 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:37:52,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:37:52,857 INFO L225 Difference]: With dead ends: 2432 [2022-11-20 10:37:52,857 INFO L226 Difference]: Without dead ends: 2432 [2022-11-20 10:37:52,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:37:52,857 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:37:52,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 26 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 31 Unchecked, 0.5s Time] [2022-11-20 10:37:52,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2022-11-20 10:37:52,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 2364. [2022-11-20 10:37:52,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2364 states, 2357 states have (on average 4.230801866779805) internal successors, (9972), 2363 states have internal predecessors, (9972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:37:52,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 9972 transitions. [2022-11-20 10:37:52,904 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 9972 transitions. Word has length 13 [2022-11-20 10:37:52,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:37:52,904 INFO L495 AbstractCegarLoop]: Abstraction has 2364 states and 9972 transitions. [2022-11-20 10:37:52,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:37:52,904 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 9972 transitions. [2022-11-20 10:37:52,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:37:52,906 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:37:52,906 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:37:52,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (177)] Ended with exit code 0 [2022-11-20 10:37:53,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:37:53,106 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:37:53,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:37:53,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1700244823, now seen corresponding path program 2 times [2022-11-20 10:37:53,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:37:53,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2102299411] [2022-11-20 10:37:53,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:37:53,107 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:37:53,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:37:53,108 INFO L229 MonitoredProcess]: Starting monitored process 178 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:37:53,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (178)] Waiting until timeout for monitored process [2022-11-20 10:37:53,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:37:53,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:37:53,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:37:53,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:37:53,644 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:37:53,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:37:53,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:37:53,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:37:54,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:37:54,509 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:37:54,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2102299411] [2022-11-20 10:37:54,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2102299411] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:37:54,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:37:54,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:37:54,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310462336] [2022-11-20 10:37:54,509 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:37:54,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:37:54,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:37:54,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:37:54,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:37:54,510 INFO L87 Difference]: Start difference. First operand 2364 states and 9972 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:37:54,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:37:54,751 INFO L93 Difference]: Finished difference Result 2458 states and 10458 transitions. [2022-11-20 10:37:54,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:37:54,752 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:37:54,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:37:54,758 INFO L225 Difference]: With dead ends: 2458 [2022-11-20 10:37:54,758 INFO L226 Difference]: Without dead ends: 2458 [2022-11-20 10:37:54,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:37:54,758 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:37:54,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 27 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2022-11-20 10:37:54,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2022-11-20 10:37:54,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 2366. [2022-11-20 10:37:54,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2366 states, 2359 states have (on average 4.230606189063162) internal successors, (9980), 2365 states have internal predecessors, (9980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:37:54,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2366 states to 2366 states and 9980 transitions. [2022-11-20 10:37:54,798 INFO L78 Accepts]: Start accepts. Automaton has 2366 states and 9980 transitions. Word has length 13 [2022-11-20 10:37:54,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:37:54,798 INFO L495 AbstractCegarLoop]: Abstraction has 2366 states and 9980 transitions. [2022-11-20 10:37:54,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:37:54,799 INFO L276 IsEmpty]: Start isEmpty. Operand 2366 states and 9980 transitions. [2022-11-20 10:37:54,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:37:54,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:37:54,800 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:37:54,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (178)] Ended with exit code 0 [2022-11-20 10:37:55,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:37:55,001 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:37:55,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:37:55,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1700111833, now seen corresponding path program 3 times [2022-11-20 10:37:55,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:37:55,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1855510080] [2022-11-20 10:37:55,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:37:55,001 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:37:55,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:37:55,002 INFO L229 MonitoredProcess]: Starting monitored process 179 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:37:55,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (179)] Waiting until timeout for monitored process [2022-11-20 10:37:55,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:37:55,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:37:55,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:37:55,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:37:55,549 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:37:55,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:37:55,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:37:55,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:37:56,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:37:56,414 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:37:56,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1855510080] [2022-11-20 10:37:56,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1855510080] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:37:56,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:37:56,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:37:56,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905735438] [2022-11-20 10:37:56,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:37:56,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:37:56,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:37:56,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:37:56,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:37:56,415 INFO L87 Difference]: Start difference. First operand 2366 states and 9980 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:37:56,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:37:56,927 INFO L93 Difference]: Finished difference Result 2486 states and 10613 transitions. [2022-11-20 10:37:56,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:37:56,928 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:37:56,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:37:56,934 INFO L225 Difference]: With dead ends: 2486 [2022-11-20 10:37:56,935 INFO L226 Difference]: Without dead ends: 2486 [2022-11-20 10:37:56,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:37:56,935 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:37:56,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 20 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 17 Unchecked, 0.4s Time] [2022-11-20 10:37:56,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2022-11-20 10:37:56,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 2365. [2022-11-20 10:37:56,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2365 states, 2358 states have (on average 4.230279898218829) internal successors, (9975), 2364 states have internal predecessors, (9975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:37:56,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2365 states to 2365 states and 9975 transitions. [2022-11-20 10:37:56,983 INFO L78 Accepts]: Start accepts. Automaton has 2365 states and 9975 transitions. Word has length 13 [2022-11-20 10:37:56,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:37:56,984 INFO L495 AbstractCegarLoop]: Abstraction has 2365 states and 9975 transitions. [2022-11-20 10:37:56,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:37:56,984 INFO L276 IsEmpty]: Start isEmpty. Operand 2365 states and 9975 transitions. [2022-11-20 10:37:56,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:37:56,985 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:37:56,985 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:37:56,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 10:37:57,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:37:57,186 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:37:57,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:37:57,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1543131677, now seen corresponding path program 6 times [2022-11-20 10:37:57,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:37:57,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [51011827] [2022-11-20 10:37:57,186 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:37:57,187 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 [2022-11-20 10:37:57,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:37:57,187 INFO L229 MonitoredProcess]: Starting monitored process 180 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:37:57,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (180)] Waiting until timeout for monitored process [2022-11-20 10:37:57,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 10:37:57,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:37:57,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:37:57,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:37:57,717 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:37:57,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:37:58,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:37:58,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:37:58,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:37:58,644 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:37:58,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [51011827] [2022-11-20 10:37:58,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [51011827] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:37:58,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:37:58,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:37:58,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905173499] [2022-11-20 10:37:58,645 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:37:58,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:37:58,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:37:58,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:37:58,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:37:58,645 INFO L87 Difference]: Start difference. First operand 2365 states and 9975 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:37:59,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:37:59,413 INFO L93 Difference]: Finished difference Result 2674 states and 11303 transitions. [2022-11-20 10:37:59,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:37:59,415 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:37:59,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:37:59,421 INFO L225 Difference]: With dead ends: 2674 [2022-11-20 10:37:59,421 INFO L226 Difference]: Without dead ends: 2674 [2022-11-20 10:37:59,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:37:59,421 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 18 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:37:59,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 21 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 43 Unchecked, 0.7s Time] [2022-11-20 10:37:59,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2674 states. [2022-11-20 10:37:59,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2674 to 2394. [2022-11-20 10:37:59,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2394 states, 2387 states have (on average 4.22496857980729) internal successors, (10085), 2393 states have internal predecessors, (10085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:37:59,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2394 states to 2394 states and 10085 transitions. [2022-11-20 10:37:59,464 INFO L78 Accepts]: Start accepts. Automaton has 2394 states and 10085 transitions. Word has length 13 [2022-11-20 10:37:59,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:37:59,464 INFO L495 AbstractCegarLoop]: Abstraction has 2394 states and 10085 transitions. [2022-11-20 10:37:59,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:37:59,464 INFO L276 IsEmpty]: Start isEmpty. Operand 2394 states and 10085 transitions. [2022-11-20 10:37:59,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:37:59,465 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:37:59,465 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:37:59,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 10:37:59,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:37:59,666 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:37:59,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:37:59,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1543136327, now seen corresponding path program 7 times [2022-11-20 10:37:59,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:37:59,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [171021813] [2022-11-20 10:37:59,667 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:37:59,667 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:37:59,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:37:59,668 INFO L229 MonitoredProcess]: Starting monitored process 181 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:37:59,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (181)] Waiting until timeout for monitored process [2022-11-20 10:38:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:00,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:38:00,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:00,177 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:38:00,178 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 [2022-11-20 10:38:00,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:00,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:01,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:01,160 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:38:01,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [171021813] [2022-11-20 10:38:01,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [171021813] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:01,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:38:01,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:38:01,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709937259] [2022-11-20 10:38:01,161 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:01,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:38:01,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:38:01,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:38:01,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:38:01,162 INFO L87 Difference]: Start difference. First operand 2394 states and 10085 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:02,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:02,025 INFO L93 Difference]: Finished difference Result 3099 states and 13294 transitions. [2022-11-20 10:38:02,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:38:02,027 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:38:02,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:02,034 INFO L225 Difference]: With dead ends: 3099 [2022-11-20 10:38:02,035 INFO L226 Difference]: Without dead ends: 3099 [2022-11-20 10:38:02,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:38:02,035 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 32 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:02,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 30 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 128 Invalid, 0 Unknown, 80 Unchecked, 0.8s Time] [2022-11-20 10:38:02,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3099 states. [2022-11-20 10:38:02,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3099 to 2507. [2022-11-20 10:38:02,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2507 states, 2500 states have (on average 4.2156) internal successors, (10539), 2506 states have internal predecessors, (10539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:02,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2507 states to 2507 states and 10539 transitions. [2022-11-20 10:38:02,082 INFO L78 Accepts]: Start accepts. Automaton has 2507 states and 10539 transitions. Word has length 13 [2022-11-20 10:38:02,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:02,082 INFO L495 AbstractCegarLoop]: Abstraction has 2507 states and 10539 transitions. [2022-11-20 10:38:02,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:02,082 INFO L276 IsEmpty]: Start isEmpty. Operand 2507 states and 10539 transitions. [2022-11-20 10:38:02,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:38:02,084 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:02,084 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:02,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:38:02,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:02,284 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:38:02,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:02,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1543679447, now seen corresponding path program 8 times [2022-11-20 10:38:02,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:38:02,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1872464035] [2022-11-20 10:38:02,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:38:02,285 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:02,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:38:02,286 INFO L229 MonitoredProcess]: Starting monitored process 182 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:38:02,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (182)] Waiting until timeout for monitored process [2022-11-20 10:38:02,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:38:02,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:02,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:38:02,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:02,818 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:38:02,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:38:03,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:03,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:03,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:03,714 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:38:03,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1872464035] [2022-11-20 10:38:03,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1872464035] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:03,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:38:03,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:38:03,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673315835] [2022-11-20 10:38:03,715 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:03,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:38:03,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:38:03,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:38:03,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:38:03,716 INFO L87 Difference]: Start difference. First operand 2507 states and 10539 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:04,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:04,460 INFO L93 Difference]: Finished difference Result 2813 states and 11841 transitions. [2022-11-20 10:38:04,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:38:04,461 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:38:04,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:04,468 INFO L225 Difference]: With dead ends: 2813 [2022-11-20 10:38:04,468 INFO L226 Difference]: Without dead ends: 2813 [2022-11-20 10:38:04,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:38:04,468 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 18 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:04,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 21 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 46 Unchecked, 0.7s Time] [2022-11-20 10:38:04,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2813 states. [2022-11-20 10:38:04,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2813 to 2575. [2022-11-20 10:38:04,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2575 states, 2568 states have (on average 4.248052959501558) internal successors, (10909), 2574 states have internal predecessors, (10909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:04,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2575 states to 2575 states and 10909 transitions. [2022-11-20 10:38:04,516 INFO L78 Accepts]: Start accepts. Automaton has 2575 states and 10909 transitions. Word has length 13 [2022-11-20 10:38:04,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:04,516 INFO L495 AbstractCegarLoop]: Abstraction has 2575 states and 10909 transitions. [2022-11-20 10:38:04,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:04,516 INFO L276 IsEmpty]: Start isEmpty. Operand 2575 states and 10909 transitions. [2022-11-20 10:38:04,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:38:04,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:04,518 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:04,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (182)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:04,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:04,720 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:38:04,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:04,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1543845917, now seen corresponding path program 9 times [2022-11-20 10:38:04,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:38:04,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [96910428] [2022-11-20 10:38:04,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:38:04,721 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:04,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:38:04,722 INFO L229 MonitoredProcess]: Starting monitored process 183 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:38:04,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (183)] Waiting until timeout for monitored process [2022-11-20 10:38:05,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:38:05,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:05,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:38:05,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:05,248 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:38:05,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:38:05,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:05,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:06,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:06,151 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:38:06,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [96910428] [2022-11-20 10:38:06,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [96910428] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:06,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:38:06,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:38:06,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639479656] [2022-11-20 10:38:06,151 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:06,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:38:06,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:38:06,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:38:06,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:38:06,152 INFO L87 Difference]: Start difference. First operand 2575 states and 10909 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:07,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:07,030 INFO L93 Difference]: Finished difference Result 3207 states and 13733 transitions. [2022-11-20 10:38:07,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:38:07,032 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:38:07,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:07,040 INFO L225 Difference]: With dead ends: 3207 [2022-11-20 10:38:07,040 INFO L226 Difference]: Without dead ends: 3207 [2022-11-20 10:38:07,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:38:07,040 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 59 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:07,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 25 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 120 Unchecked, 0.8s Time] [2022-11-20 10:38:07,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2022-11-20 10:38:07,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 2560. [2022-11-20 10:38:07,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2560 states, 2553 states have (on average 4.2420681551116335) internal successors, (10830), 2559 states have internal predecessors, (10830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:07,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2560 states to 2560 states and 10830 transitions. [2022-11-20 10:38:07,114 INFO L78 Accepts]: Start accepts. Automaton has 2560 states and 10830 transitions. Word has length 13 [2022-11-20 10:38:07,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:07,114 INFO L495 AbstractCegarLoop]: Abstraction has 2560 states and 10830 transitions. [2022-11-20 10:38:07,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:07,115 INFO L276 IsEmpty]: Start isEmpty. Operand 2560 states and 10830 transitions. [2022-11-20 10:38:07,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:38:07,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:07,116 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:07,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (183)] Ended with exit code 0 [2022-11-20 10:38:07,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:07,316 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:38:07,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:07,317 INFO L85 PathProgramCache]: Analyzing trace with hash -873649787, now seen corresponding path program 4 times [2022-11-20 10:38:07,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:38:07,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [333220369] [2022-11-20 10:38:07,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:38:07,317 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 [2022-11-20 10:38:07,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:38:07,318 INFO L229 MonitoredProcess]: Starting monitored process 184 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:38:07,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (184)] Waiting until timeout for monitored process [2022-11-20 10:38:07,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:38:07,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:07,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:38:07,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:07,831 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:38:07,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:38:08,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:08,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:08,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:08,767 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:38:08,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [333220369] [2022-11-20 10:38:08,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [333220369] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:08,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:38:08,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:38:08,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823037754] [2022-11-20 10:38:08,768 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:08,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:38:08,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:38:08,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:38:08,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:38:08,768 INFO L87 Difference]: Start difference. First operand 2560 states and 10830 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:09,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:09,316 INFO L93 Difference]: Finished difference Result 2643 states and 11248 transitions. [2022-11-20 10:38:09,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:38:09,317 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:38:09,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:09,324 INFO L225 Difference]: With dead ends: 2643 [2022-11-20 10:38:09,324 INFO L226 Difference]: Without dead ends: 2643 [2022-11-20 10:38:09,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:38:09,324 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:09,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 22 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 36 Unchecked, 0.5s Time] [2022-11-20 10:38:09,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2643 states. [2022-11-20 10:38:09,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2643 to 2575. [2022-11-20 10:38:09,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2575 states, 2568 states have (on average 4.250778816199377) internal successors, (10916), 2574 states have internal predecessors, (10916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:09,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2575 states to 2575 states and 10916 transitions. [2022-11-20 10:38:09,372 INFO L78 Accepts]: Start accepts. Automaton has 2575 states and 10916 transitions. Word has length 13 [2022-11-20 10:38:09,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:09,372 INFO L495 AbstractCegarLoop]: Abstraction has 2575 states and 10916 transitions. [2022-11-20 10:38:09,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:09,372 INFO L276 IsEmpty]: Start isEmpty. Operand 2575 states and 10916 transitions. [2022-11-20 10:38:09,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:38:09,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:09,374 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:09,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (184)] Ended with exit code 0 [2022-11-20 10:38:09,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:09,575 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:38:09,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:09,575 INFO L85 PathProgramCache]: Analyzing trace with hash -873647927, now seen corresponding path program 5 times [2022-11-20 10:38:09,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:38:09,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1410665795] [2022-11-20 10:38:09,575 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:38:09,575 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:09,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:38:09,576 INFO L229 MonitoredProcess]: Starting monitored process 185 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:38:09,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (185)] Waiting until timeout for monitored process [2022-11-20 10:38:09,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:38:09,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:09,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:38:09,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:10,096 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:38:10,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:38:10,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:10,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:11,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:11,047 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:38:11,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1410665795] [2022-11-20 10:38:11,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1410665795] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:11,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:38:11,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:38:11,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262455831] [2022-11-20 10:38:11,048 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:11,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:38:11,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:38:11,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:38:11,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:38:11,049 INFO L87 Difference]: Start difference. First operand 2575 states and 10916 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:11,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:11,544 INFO L93 Difference]: Finished difference Result 2721 states and 11617 transitions. [2022-11-20 10:38:11,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:38:11,546 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:38:11,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:11,554 INFO L225 Difference]: With dead ends: 2721 [2022-11-20 10:38:11,554 INFO L226 Difference]: Without dead ends: 2721 [2022-11-20 10:38:11,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:38:11,555 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:11,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 19 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 45 Unchecked, 0.4s Time] [2022-11-20 10:38:11,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2022-11-20 10:38:11,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 2595. [2022-11-20 10:38:11,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2595 states, 2588 states have (on average 4.264683153013911) internal successors, (11037), 2594 states have internal predecessors, (11037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:11,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2595 states to 2595 states and 11037 transitions. [2022-11-20 10:38:11,638 INFO L78 Accepts]: Start accepts. Automaton has 2595 states and 11037 transitions. Word has length 13 [2022-11-20 10:38:11,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:11,638 INFO L495 AbstractCegarLoop]: Abstraction has 2595 states and 11037 transitions. [2022-11-20 10:38:11,638 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) [2022-11-20 10:38:11,639 INFO L276 IsEmpty]: Start isEmpty. Operand 2595 states and 11037 transitions. [2022-11-20 10:38:11,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:38:11,641 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:11,641 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:11,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (185)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:11,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:11,856 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:38:11,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:11,856 INFO L85 PathProgramCache]: Analyzing trace with hash -893657807, now seen corresponding path program 6 times [2022-11-20 10:38:11,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:38:11,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [735054361] [2022-11-20 10:38:11,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:38:11,857 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 [2022-11-20 10:38:11,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:38:11,858 INFO L229 MonitoredProcess]: Starting monitored process 186 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:38:11,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (186)] Waiting until timeout for monitored process [2022-11-20 10:38:12,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 10:38:12,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:12,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:38:12,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:12,484 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:38:12,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:38:12,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:12,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:13,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:13,413 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:38:13,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [735054361] [2022-11-20 10:38:13,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [735054361] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:13,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:38:13,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:38:13,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799209865] [2022-11-20 10:38:13,413 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:13,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:38:13,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:38:13,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:38:13,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:38:13,414 INFO L87 Difference]: Start difference. First operand 2595 states and 11037 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:14,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:14,082 INFO L93 Difference]: Finished difference Result 2855 states and 12232 transitions. [2022-11-20 10:38:14,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:38:14,083 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:38:14,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:14,090 INFO L225 Difference]: With dead ends: 2855 [2022-11-20 10:38:14,090 INFO L226 Difference]: Without dead ends: 2855 [2022-11-20 10:38:14,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:38:14,090 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:14,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 27 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 40 Unchecked, 0.6s Time] [2022-11-20 10:38:14,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2855 states. [2022-11-20 10:38:14,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2855 to 2658. [2022-11-20 10:38:14,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2658 states, 2651 states have (on average 4.273104488872124) internal successors, (11328), 2657 states have internal predecessors, (11328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:14,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2658 states to 2658 states and 11328 transitions. [2022-11-20 10:38:14,165 INFO L78 Accepts]: Start accepts. Automaton has 2658 states and 11328 transitions. Word has length 13 [2022-11-20 10:38:14,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:14,165 INFO L495 AbstractCegarLoop]: Abstraction has 2658 states and 11328 transitions. [2022-11-20 10:38:14,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:14,165 INFO L276 IsEmpty]: Start isEmpty. Operand 2658 states and 11328 transitions. [2022-11-20 10:38:14,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:38:14,166 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:14,167 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:14,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:38:14,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:14,367 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:38:14,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:14,368 INFO L85 PathProgramCache]: Analyzing trace with hash -893519113, now seen corresponding path program 10 times [2022-11-20 10:38:14,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:38:14,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1116353203] [2022-11-20 10:38:14,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:38:14,368 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:14,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:38:14,369 INFO L229 MonitoredProcess]: Starting monitored process 187 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:38:14,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (187)] Waiting until timeout for monitored process [2022-11-20 10:38:14,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:38:14,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:14,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:38:14,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:14,886 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:38:14,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:38:15,192 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:38:15,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:15,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:38:15,820 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:38:15,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1116353203] [2022-11-20 10:38:15,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1116353203] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:15,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:38:15,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:38:15,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040939591] [2022-11-20 10:38:15,821 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:15,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:38:15,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:38:15,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:38:15,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:38:15,822 INFO L87 Difference]: Start difference. First operand 2658 states and 11328 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:16,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:16,425 INFO L93 Difference]: Finished difference Result 2698 states and 11478 transitions. [2022-11-20 10:38:16,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:38:16,427 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:38:16,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:16,433 INFO L225 Difference]: With dead ends: 2698 [2022-11-20 10:38:16,433 INFO L226 Difference]: Without dead ends: 2698 [2022-11-20 10:38:16,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:38:16,434 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:16,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 25 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 55 Unchecked, 0.5s Time] [2022-11-20 10:38:16,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2698 states. [2022-11-20 10:38:16,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2698 to 2671. [2022-11-20 10:38:16,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2671 states, 2664 states have (on average 4.273648648648648) internal successors, (11385), 2670 states have internal predecessors, (11385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:16,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2671 states to 2671 states and 11385 transitions. [2022-11-20 10:38:16,504 INFO L78 Accepts]: Start accepts. Automaton has 2671 states and 11385 transitions. Word has length 13 [2022-11-20 10:38:16,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:16,504 INFO L495 AbstractCegarLoop]: Abstraction has 2671 states and 11385 transitions. [2022-11-20 10:38:16,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:16,505 INFO L276 IsEmpty]: Start isEmpty. Operand 2671 states and 11385 transitions. [2022-11-20 10:38:16,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:38:16,507 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:16,507 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:16,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:38:16,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:16,719 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:38:16,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:16,719 INFO L85 PathProgramCache]: Analyzing trace with hash -897780497, now seen corresponding path program 7 times [2022-11-20 10:38:16,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:38:16,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [846943059] [2022-11-20 10:38:16,720 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:38:16,720 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:16,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:38:16,721 INFO L229 MonitoredProcess]: Starting monitored process 188 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:38:16,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (188)] Waiting until timeout for monitored process [2022-11-20 10:38:17,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:17,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:38:17,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:17,243 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:38:17,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:38:17,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:17,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:18,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:18,260 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:38:18,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [846943059] [2022-11-20 10:38:18,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [846943059] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:18,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:38:18,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:38:18,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071781003] [2022-11-20 10:38:18,261 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:18,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:38:18,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:38:18,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:38:18,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:38:18,262 INFO L87 Difference]: Start difference. First operand 2671 states and 11385 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:18,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:18,888 INFO L93 Difference]: Finished difference Result 2743 states and 11753 transitions. [2022-11-20 10:38:18,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:38:18,890 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:38:18,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:18,897 INFO L225 Difference]: With dead ends: 2743 [2022-11-20 10:38:18,897 INFO L226 Difference]: Without dead ends: 2743 [2022-11-20 10:38:18,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:38:18,898 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 13 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:18,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 25 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 16 Unchecked, 0.6s Time] [2022-11-20 10:38:18,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2743 states. [2022-11-20 10:38:18,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2743 to 2688. [2022-11-20 10:38:18,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2688 states, 2681 states have (on average 4.279746363297277) internal successors, (11474), 2687 states have internal predecessors, (11474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:18,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2688 states to 2688 states and 11474 transitions. [2022-11-20 10:38:18,948 INFO L78 Accepts]: Start accepts. Automaton has 2688 states and 11474 transitions. Word has length 13 [2022-11-20 10:38:18,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:18,948 INFO L495 AbstractCegarLoop]: Abstraction has 2688 states and 11474 transitions. [2022-11-20 10:38:18,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:18,948 INFO L276 IsEmpty]: Start isEmpty. Operand 2688 states and 11474 transitions. [2022-11-20 10:38:18,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:38:18,950 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:18,950 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:18,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:38:19,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:19,150 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:38:19,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:19,151 INFO L85 PathProgramCache]: Analyzing trace with hash -897778637, now seen corresponding path program 8 times [2022-11-20 10:38:19,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:38:19,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1806962356] [2022-11-20 10:38:19,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:38:19,151 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 [2022-11-20 10:38:19,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:38:19,152 INFO L229 MonitoredProcess]: Starting monitored process 189 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:38:19,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (189)] Waiting until timeout for monitored process [2022-11-20 10:38:19,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:38:19,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:19,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:38:19,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:19,745 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:38:19,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:38:20,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:20,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:20,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:20,637 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:38:20,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1806962356] [2022-11-20 10:38:20,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1806962356] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:20,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:38:20,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:38:20,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543291871] [2022-11-20 10:38:20,638 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:20,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:38:20,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:38:20,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:38:20,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:38:20,639 INFO L87 Difference]: Start difference. First operand 2688 states and 11474 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:21,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:21,471 INFO L93 Difference]: Finished difference Result 3195 states and 13807 transitions. [2022-11-20 10:38:21,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:38:21,472 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:38:21,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:21,480 INFO L225 Difference]: With dead ends: 3195 [2022-11-20 10:38:21,480 INFO L226 Difference]: Without dead ends: 3195 [2022-11-20 10:38:21,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:38:21,480 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 46 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:21,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 26 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 81 Unchecked, 0.7s Time] [2022-11-20 10:38:21,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3195 states. [2022-11-20 10:38:21,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3195 to 2779. [2022-11-20 10:38:21,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2779 states, 2772 states have (on average 4.31998556998557) internal successors, (11975), 2778 states have internal predecessors, (11975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:21,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2779 states to 2779 states and 11975 transitions. [2022-11-20 10:38:21,554 INFO L78 Accepts]: Start accepts. Automaton has 2779 states and 11975 transitions. Word has length 13 [2022-11-20 10:38:21,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:21,554 INFO L495 AbstractCegarLoop]: Abstraction has 2779 states and 11975 transitions. [2022-11-20 10:38:21,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:21,554 INFO L276 IsEmpty]: Start isEmpty. Operand 2779 states and 11975 transitions. [2022-11-20 10:38:21,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:38:21,556 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:21,556 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:21,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (189)] Ended with exit code 0 [2022-11-20 10:38:21,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:21,756 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:38:21,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:21,757 INFO L85 PathProgramCache]: Analyzing trace with hash -893479123, now seen corresponding path program 11 times [2022-11-20 10:38:21,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:38:21,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [903872489] [2022-11-20 10:38:21,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:38:21,757 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:21,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:38:21,758 INFO L229 MonitoredProcess]: Starting monitored process 190 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:38:21,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (190)] Waiting until timeout for monitored process [2022-11-20 10:38:22,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:38:22,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:22,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:38:22,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:22,292 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:38:22,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:38:22,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:38:22,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:23,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:38:23,229 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:38:23,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [903872489] [2022-11-20 10:38:23,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [903872489] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:23,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:38:23,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:38:23,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820309225] [2022-11-20 10:38:23,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:23,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:38:23,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:38:23,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:38:23,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:38:23,230 INFO L87 Difference]: Start difference. First operand 2779 states and 11975 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:23,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:23,742 INFO L93 Difference]: Finished difference Result 2852 states and 12234 transitions. [2022-11-20 10:38:23,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:38:23,743 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:38:23,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:23,750 INFO L225 Difference]: With dead ends: 2852 [2022-11-20 10:38:23,750 INFO L226 Difference]: Without dead ends: 2852 [2022-11-20 10:38:23,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:38:23,751 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 24 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:23,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 21 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 45 Unchecked, 0.4s Time] [2022-11-20 10:38:23,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2022-11-20 10:38:23,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 2781. [2022-11-20 10:38:23,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2781 states, 2774 states have (on average 4.319754866618601) internal successors, (11983), 2780 states have internal predecessors, (11983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:23,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2781 states to 2781 states and 11983 transitions. [2022-11-20 10:38:23,803 INFO L78 Accepts]: Start accepts. Automaton has 2781 states and 11983 transitions. Word has length 13 [2022-11-20 10:38:23,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:23,804 INFO L495 AbstractCegarLoop]: Abstraction has 2781 states and 11983 transitions. [2022-11-20 10:38:23,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:23,804 INFO L276 IsEmpty]: Start isEmpty. Operand 2781 states and 11983 transitions. [2022-11-20 10:38:23,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:38:23,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:23,805 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:23,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (190)] Ended with exit code 0 [2022-11-20 10:38:24,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:24,007 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:38:24,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:24,007 INFO L85 PathProgramCache]: Analyzing trace with hash -893461453, now seen corresponding path program 12 times [2022-11-20 10:38:24,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:38:24,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [72259874] [2022-11-20 10:38:24,008 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:38:24,008 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:24,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:38:24,009 INFO L229 MonitoredProcess]: Starting monitored process 191 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:38:24,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (191)] Waiting until timeout for monitored process [2022-11-20 10:38:24,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 10:38:24,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:24,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:38:24,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:24,585 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:38:24,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:38:24,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:24,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:25,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:25,621 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:38:25,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [72259874] [2022-11-20 10:38:25,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [72259874] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:25,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:38:25,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:38:25,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970561439] [2022-11-20 10:38:25,621 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:25,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:38:25,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:38:25,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:38:25,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:38:25,622 INFO L87 Difference]: Start difference. First operand 2781 states and 11983 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:26,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:26,259 INFO L93 Difference]: Finished difference Result 2844 states and 12214 transitions. [2022-11-20 10:38:26,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:38:26,261 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:38:26,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:26,269 INFO L225 Difference]: With dead ends: 2844 [2022-11-20 10:38:26,269 INFO L226 Difference]: Without dead ends: 2844 [2022-11-20 10:38:26,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:38:26,269 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 20 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:26,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 21 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 45 Unchecked, 0.6s Time] [2022-11-20 10:38:26,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2844 states. [2022-11-20 10:38:26,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2844 to 2784. [2022-11-20 10:38:26,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2784 states, 2777 states have (on average 4.320129636298163) internal successors, (11997), 2783 states have internal predecessors, (11997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:26,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2784 states to 2784 states and 11997 transitions. [2022-11-20 10:38:26,332 INFO L78 Accepts]: Start accepts. Automaton has 2784 states and 11997 transitions. Word has length 13 [2022-11-20 10:38:26,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:26,332 INFO L495 AbstractCegarLoop]: Abstraction has 2784 states and 11997 transitions. [2022-11-20 10:38:26,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:26,333 INFO L276 IsEmpty]: Start isEmpty. Operand 2784 states and 11997 transitions. [2022-11-20 10:38:26,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:38:26,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:26,335 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:26,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:38:26,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:26,535 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:38:26,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:26,535 INFO L85 PathProgramCache]: Analyzing trace with hash -893465297, now seen corresponding path program 9 times [2022-11-20 10:38:26,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:38:26,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [631139434] [2022-11-20 10:38:26,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:38:26,536 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:26,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:38:26,537 INFO L229 MonitoredProcess]: Starting monitored process 192 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:38:26,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (192)] Waiting until timeout for monitored process [2022-11-20 10:38:27,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:38:27,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:27,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:38:27,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:27,284 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:38:27,284 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 [2022-11-20 10:38:27,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:27,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:28,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:28,240 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:38:28,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [631139434] [2022-11-20 10:38:28,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [631139434] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:28,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:38:28,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:38:28,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911991299] [2022-11-20 10:38:28,240 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:28,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:38:28,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:38:28,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:38:28,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:38:28,241 INFO L87 Difference]: Start difference. First operand 2784 states and 11997 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:28,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:28,547 INFO L93 Difference]: Finished difference Result 2866 states and 12427 transitions. [2022-11-20 10:38:28,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:38:28,548 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:38:28,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:28,555 INFO L225 Difference]: With dead ends: 2866 [2022-11-20 10:38:28,555 INFO L226 Difference]: Without dead ends: 2866 [2022-11-20 10:38:28,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:38:28,555 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 8 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:28,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 27 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-11-20 10:38:28,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2866 states. [2022-11-20 10:38:28,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2866 to 2783. [2022-11-20 10:38:28,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2783 states, 2776 states have (on average 4.321325648414986) internal successors, (11996), 2782 states have internal predecessors, (11996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:28,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 11996 transitions. [2022-11-20 10:38:28,637 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 11996 transitions. Word has length 13 [2022-11-20 10:38:28,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:28,637 INFO L495 AbstractCegarLoop]: Abstraction has 2783 states and 11996 transitions. [2022-11-20 10:38:28,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:28,637 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 11996 transitions. [2022-11-20 10:38:28,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:38:28,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:28,639 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:28,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 10:38:28,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:28,843 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:38:28,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:28,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1451614527, now seen corresponding path program 13 times [2022-11-20 10:38:28,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:38:28,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1935023493] [2022-11-20 10:38:28,844 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:38:28,844 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:28,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:38:28,845 INFO L229 MonitoredProcess]: Starting monitored process 193 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:38:28,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (193)] Waiting until timeout for monitored process [2022-11-20 10:38:29,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:29,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:38:29,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:29,402 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:38:29,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:38:29,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:38:29,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:30,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:38:30,393 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:38:30,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1935023493] [2022-11-20 10:38:30,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1935023493] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:30,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:38:30,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:38:30,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982931723] [2022-11-20 10:38:30,394 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:30,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:38:30,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:38:30,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:38:30,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:38:30,395 INFO L87 Difference]: Start difference. First operand 2783 states and 11996 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:31,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:31,183 INFO L93 Difference]: Finished difference Result 3000 states and 12846 transitions. [2022-11-20 10:38:31,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:38:31,184 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:38:31,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:31,191 INFO L225 Difference]: With dead ends: 3000 [2022-11-20 10:38:31,191 INFO L226 Difference]: Without dead ends: 3000 [2022-11-20 10:38:31,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:38:31,191 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 25 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:31,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 21 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 88 Unchecked, 0.7s Time] [2022-11-20 10:38:31,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3000 states. [2022-11-20 10:38:31,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3000 to 2798. [2022-11-20 10:38:31,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2798 states, 2791 states have (on average 4.315657470440702) internal successors, (12045), 2797 states have internal predecessors, (12045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:31,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2798 states to 2798 states and 12045 transitions. [2022-11-20 10:38:31,246 INFO L78 Accepts]: Start accepts. Automaton has 2798 states and 12045 transitions. Word has length 13 [2022-11-20 10:38:31,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:31,246 INFO L495 AbstractCegarLoop]: Abstraction has 2798 states and 12045 transitions. [2022-11-20 10:38:31,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:31,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2798 states and 12045 transitions. [2022-11-20 10:38:31,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:38:31,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:31,248 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:31,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (193)] Ended with exit code 0 [2022-11-20 10:38:31,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:31,449 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:38:31,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:31,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1450374837, now seen corresponding path program 14 times [2022-11-20 10:38:31,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:38:31,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [562626222] [2022-11-20 10:38:31,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:38:31,450 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:31,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:38:31,450 INFO L229 MonitoredProcess]: Starting monitored process 194 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:38:31,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (194)] Waiting until timeout for monitored process [2022-11-20 10:38:31,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:38:31,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:31,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:38:31,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:32,049 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:38:32,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:38:32,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:38:32,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:32,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:38:32,979 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:38:32,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [562626222] [2022-11-20 10:38:32,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [562626222] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:32,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:38:32,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:38:32,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542489699] [2022-11-20 10:38:32,980 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:32,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:38:32,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:38:32,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:38:32,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:38:32,981 INFO L87 Difference]: Start difference. First operand 2798 states and 12045 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:33,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:33,853 INFO L93 Difference]: Finished difference Result 3330 states and 14413 transitions. [2022-11-20 10:38:33,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:38:33,855 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:38:33,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:33,863 INFO L225 Difference]: With dead ends: 3330 [2022-11-20 10:38:33,863 INFO L226 Difference]: Without dead ends: 3330 [2022-11-20 10:38:33,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:38:33,864 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 31 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:33,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 27 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 140 Invalid, 0 Unknown, 94 Unchecked, 0.8s Time] [2022-11-20 10:38:33,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3330 states. [2022-11-20 10:38:33,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3330 to 2894. [2022-11-20 10:38:33,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2894 states, 2887 states have (on average 4.357810876342223) internal successors, (12581), 2893 states have internal predecessors, (12581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:33,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2894 states to 2894 states and 12581 transitions. [2022-11-20 10:38:33,921 INFO L78 Accepts]: Start accepts. Automaton has 2894 states and 12581 transitions. Word has length 13 [2022-11-20 10:38:33,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:33,921 INFO L495 AbstractCegarLoop]: Abstraction has 2894 states and 12581 transitions. [2022-11-20 10:38:33,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:33,921 INFO L276 IsEmpty]: Start isEmpty. Operand 2894 states and 12581 transitions. [2022-11-20 10:38:33,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:38:33,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:33,923 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:33,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:38:34,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:34,123 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:38:34,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:34,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1450370187, now seen corresponding path program 15 times [2022-11-20 10:38:34,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:38:34,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1187967893] [2022-11-20 10:38:34,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:38:34,124 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:34,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:38:34,125 INFO L229 MonitoredProcess]: Starting monitored process 195 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:38:34,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (195)] Waiting until timeout for monitored process [2022-11-20 10:38:34,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:38:34,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:34,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:38:34,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:34,685 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:38:34,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:38:35,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:38:35,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:35,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:38:35,642 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:38:35,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1187967893] [2022-11-20 10:38:35,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1187967893] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:35,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:38:35,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:38:35,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376212648] [2022-11-20 10:38:35,643 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:35,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:38:35,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:38:35,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:38:35,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:38:35,643 INFO L87 Difference]: Start difference. First operand 2894 states and 12581 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:36,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:36,576 INFO L93 Difference]: Finished difference Result 3432 states and 14721 transitions. [2022-11-20 10:38:36,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:38:36,578 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:38:36,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:36,587 INFO L225 Difference]: With dead ends: 3432 [2022-11-20 10:38:36,587 INFO L226 Difference]: Without dead ends: 3432 [2022-11-20 10:38:36,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:38:36,587 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 40 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:36,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 31 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 144 Invalid, 0 Unknown, 177 Unchecked, 0.9s Time] [2022-11-20 10:38:36,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3432 states. [2022-11-20 10:38:36,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3432 to 2754. [2022-11-20 10:38:36,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2754 states, 2747 states have (on average 4.3054240990171095) internal successors, (11827), 2753 states have internal predecessors, (11827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:36,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2754 states to 2754 states and 11827 transitions. [2022-11-20 10:38:36,671 INFO L78 Accepts]: Start accepts. Automaton has 2754 states and 11827 transitions. Word has length 13 [2022-11-20 10:38:36,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:36,671 INFO L495 AbstractCegarLoop]: Abstraction has 2754 states and 11827 transitions. [2022-11-20 10:38:36,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:36,672 INFO L276 IsEmpty]: Start isEmpty. Operand 2754 states and 11827 transitions. [2022-11-20 10:38:36,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:38:36,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:36,673 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:36,686 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 10:38:36,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:36,874 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:38:36,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:36,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1449827067, now seen corresponding path program 16 times [2022-11-20 10:38:36,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:38:36,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [933863185] [2022-11-20 10:38:36,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:38:36,875 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:36,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:38:36,876 INFO L229 MonitoredProcess]: Starting monitored process 196 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:38:36,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (196)] Waiting until timeout for monitored process [2022-11-20 10:38:37,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:38:37,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:37,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:38:37,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:37,417 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:38:37,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:38:37,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:37,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:38,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:38,455 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:38:38,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [933863185] [2022-11-20 10:38:38,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [933863185] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:38,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:38:38,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:38:38,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228100115] [2022-11-20 10:38:38,455 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:38,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:38:38,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:38:38,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:38:38,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:38:38,456 INFO L87 Difference]: Start difference. First operand 2754 states and 11827 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:39,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:39,281 INFO L93 Difference]: Finished difference Result 3136 states and 13521 transitions. [2022-11-20 10:38:39,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:38:39,283 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:38:39,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:39,291 INFO L225 Difference]: With dead ends: 3136 [2022-11-20 10:38:39,291 INFO L226 Difference]: Without dead ends: 3136 [2022-11-20 10:38:39,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:38:39,292 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:39,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 21 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 36 Unchecked, 0.8s Time] [2022-11-20 10:38:39,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3136 states. [2022-11-20 10:38:39,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3136 to 2795. [2022-11-20 10:38:39,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2795 states, 2788 states have (on average 4.3299856527977045) internal successors, (12072), 2794 states have internal predecessors, (12072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:39,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2795 states to 2795 states and 12072 transitions. [2022-11-20 10:38:39,348 INFO L78 Accepts]: Start accepts. Automaton has 2795 states and 12072 transitions. Word has length 13 [2022-11-20 10:38:39,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:39,348 INFO L495 AbstractCegarLoop]: Abstraction has 2795 states and 12072 transitions. [2022-11-20 10:38:39,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:39,348 INFO L276 IsEmpty]: Start isEmpty. Operand 2795 states and 12072 transitions. [2022-11-20 10:38:39,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:38:39,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:39,350 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:39,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (196)] Ended with exit code 0 [2022-11-20 10:38:39,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:39,550 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:38:39,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:39,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1449660597, now seen corresponding path program 17 times [2022-11-20 10:38:39,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:38:39,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1130001499] [2022-11-20 10:38:39,551 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:38:39,551 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:39,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:38:39,552 INFO L229 MonitoredProcess]: Starting monitored process 197 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:38:39,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (197)] Waiting until timeout for monitored process [2022-11-20 10:38:39,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:38:39,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:40,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:38:40,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:40,165 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:38:40,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:38:40,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:40,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:41,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:41,179 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:38:41,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1130001499] [2022-11-20 10:38:41,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1130001499] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:41,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:38:41,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:38:41,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797970385] [2022-11-20 10:38:41,180 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:41,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:38:41,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:38:41,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:38:41,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:38:41,181 INFO L87 Difference]: Start difference. First operand 2795 states and 12072 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:41,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:41,440 INFO L93 Difference]: Finished difference Result 2844 states and 12262 transitions. [2022-11-20 10:38:41,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:38:41,441 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:38:41,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:41,448 INFO L225 Difference]: With dead ends: 2844 [2022-11-20 10:38:41,448 INFO L226 Difference]: Without dead ends: 2844 [2022-11-20 10:38:41,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:38:41,448 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 8 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:41,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 30 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 30 Unchecked, 0.2s Time] [2022-11-20 10:38:41,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2844 states. [2022-11-20 10:38:41,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2844 to 2795. [2022-11-20 10:38:41,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2795 states, 2788 states have (on average 4.3299856527977045) internal successors, (12072), 2794 states have internal predecessors, (12072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:41,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2795 states to 2795 states and 12072 transitions. [2022-11-20 10:38:41,501 INFO L78 Accepts]: Start accepts. Automaton has 2795 states and 12072 transitions. Word has length 13 [2022-11-20 10:38:41,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:41,501 INFO L495 AbstractCegarLoop]: Abstraction has 2795 states and 12072 transitions. [2022-11-20 10:38:41,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:41,501 INFO L276 IsEmpty]: Start isEmpty. Operand 2795 states and 12072 transitions. [2022-11-20 10:38:41,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:38:41,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:41,503 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:41,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (197)] Ended with exit code 0 [2022-11-20 10:38:41,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:41,703 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:38:41,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:41,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1447175761, now seen corresponding path program 10 times [2022-11-20 10:38:41,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:38:41,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [201248257] [2022-11-20 10:38:41,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:38:41,704 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:41,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:38:41,705 INFO L229 MonitoredProcess]: Starting monitored process 198 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:38:41,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (198)] Waiting until timeout for monitored process [2022-11-20 10:38:42,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:38:42,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:42,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:38:42,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:42,249 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:38:42,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:38:42,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:42,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:43,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:43,376 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:38:43,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [201248257] [2022-11-20 10:38:43,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [201248257] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:43,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:38:43,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:38:43,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186075577] [2022-11-20 10:38:43,377 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:43,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:38:43,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:38:43,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:38:43,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:38:43,377 INFO L87 Difference]: Start difference. First operand 2795 states and 12072 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:44,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:44,197 INFO L93 Difference]: Finished difference Result 3154 states and 13777 transitions. [2022-11-20 10:38:44,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:38:44,198 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:38:44,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:44,207 INFO L225 Difference]: With dead ends: 3154 [2022-11-20 10:38:44,207 INFO L226 Difference]: Without dead ends: 3154 [2022-11-20 10:38:44,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:38:44,208 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 32 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:44,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 30 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 113 Invalid, 0 Unknown, 104 Unchecked, 0.7s Time] [2022-11-20 10:38:44,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3154 states. [2022-11-20 10:38:44,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3154 to 2813. [2022-11-20 10:38:44,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2813 states, 2806 states have (on average 4.337847469707769) internal successors, (12172), 2812 states have internal predecessors, (12172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:44,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2813 states to 2813 states and 12172 transitions. [2022-11-20 10:38:44,269 INFO L78 Accepts]: Start accepts. Automaton has 2813 states and 12172 transitions. Word has length 13 [2022-11-20 10:38:44,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:44,270 INFO L495 AbstractCegarLoop]: Abstraction has 2813 states and 12172 transitions. [2022-11-20 10:38:44,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:44,270 INFO L276 IsEmpty]: Start isEmpty. Operand 2813 states and 12172 transitions. [2022-11-20 10:38:44,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:38:44,271 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:44,271 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:44,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:38:44,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:44,472 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:38:44,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:44,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1447037067, now seen corresponding path program 18 times [2022-11-20 10:38:44,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:38:44,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [227888159] [2022-11-20 10:38:44,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:38:44,473 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:44,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:38:44,474 INFO L229 MonitoredProcess]: Starting monitored process 199 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:38:44,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (199)] Waiting until timeout for monitored process [2022-11-20 10:38:44,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-20 10:38:44,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:44,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:38:44,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:45,050 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:38:45,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:38:45,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:38:45,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:45,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:38:45,978 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:38:45,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [227888159] [2022-11-20 10:38:45,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [227888159] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:45,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:38:45,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:38:45,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907274795] [2022-11-20 10:38:45,978 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:45,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:38:45,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:38:45,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:38:45,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:38:45,979 INFO L87 Difference]: Start difference. First operand 2813 states and 12172 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:46,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:46,622 INFO L93 Difference]: Finished difference Result 2872 states and 12398 transitions. [2022-11-20 10:38:46,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:38:46,623 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:38:46,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:46,630 INFO L225 Difference]: With dead ends: 2872 [2022-11-20 10:38:46,630 INFO L226 Difference]: Without dead ends: 2872 [2022-11-20 10:38:46,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:38:46,631 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:46,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 33 Unchecked, 0.6s Time] [2022-11-20 10:38:46,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2872 states. [2022-11-20 10:38:46,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2872 to 2795. [2022-11-20 10:38:46,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2795 states, 2788 states have (on average 4.336083213773314) internal successors, (12089), 2794 states have internal predecessors, (12089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:46,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2795 states to 2795 states and 12089 transitions. [2022-11-20 10:38:46,687 INFO L78 Accepts]: Start accepts. Automaton has 2795 states and 12089 transitions. Word has length 13 [2022-11-20 10:38:46,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:46,687 INFO L495 AbstractCegarLoop]: Abstraction has 2795 states and 12089 transitions. [2022-11-20 10:38:46,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:46,688 INFO L276 IsEmpty]: Start isEmpty. Operand 2795 states and 12089 transitions. [2022-11-20 10:38:46,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:38:46,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:46,689 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:46,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:38:46,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:46,889 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:38:46,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:46,890 INFO L85 PathProgramCache]: Analyzing trace with hash -807342717, now seen corresponding path program 1 times [2022-11-20 10:38:46,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:38:46,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [376831827] [2022-11-20 10:38:46,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:46,890 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:46,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:38:46,891 INFO L229 MonitoredProcess]: Starting monitored process 200 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:38:46,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:38:47,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:47,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:38:47,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:47,438 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:38:47,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:38:47,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:47,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:48,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:48,354 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:38:48,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [376831827] [2022-11-20 10:38:48,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [376831827] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:48,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:38:48,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:38:48,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242443154] [2022-11-20 10:38:48,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:48,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:38:48,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:38:48,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:38:48,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:38:48,355 INFO L87 Difference]: Start difference. First operand 2795 states and 12089 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:48,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:48,790 INFO L93 Difference]: Finished difference Result 2990 states and 13071 transitions. [2022-11-20 10:38:48,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:38:48,792 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:38:48,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:48,800 INFO L225 Difference]: With dead ends: 2990 [2022-11-20 10:38:48,800 INFO L226 Difference]: Without dead ends: 2990 [2022-11-20 10:38:48,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:38:48,800 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:48,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 17 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 16 Unchecked, 0.4s Time] [2022-11-20 10:38:48,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2990 states. [2022-11-20 10:38:48,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2990 to 2827. [2022-11-20 10:38:48,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2827 states, 2820 states have (on average 4.340070921985816) internal successors, (12239), 2826 states have internal predecessors, (12239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:48,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2827 states to 2827 states and 12239 transitions. [2022-11-20 10:38:48,859 INFO L78 Accepts]: Start accepts. Automaton has 2827 states and 12239 transitions. Word has length 13 [2022-11-20 10:38:48,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:48,860 INFO L495 AbstractCegarLoop]: Abstraction has 2827 states and 12239 transitions. [2022-11-20 10:38:48,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:48,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2827 states and 12239 transitions. [2022-11-20 10:38:48,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:38:48,862 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:48,862 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:48,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:38:49,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:49,075 INFO L420 AbstractCegarLoop]: === Iteration 200 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:38:49,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:49,075 INFO L85 PathProgramCache]: Analyzing trace with hash -807541737, now seen corresponding path program 2 times [2022-11-20 10:38:49,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:38:49,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [231071199] [2022-11-20 10:38:49,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:38:49,076 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 [2022-11-20 10:38:49,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:38:49,077 INFO L229 MonitoredProcess]: Starting monitored process 201 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:38:49,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:38:49,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:38:49,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:49,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:38:49,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:49,642 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:38:49,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:38:49,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:49,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:50,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:50,611 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:38:50,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [231071199] [2022-11-20 10:38:50,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [231071199] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:50,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:38:50,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:38:50,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075281466] [2022-11-20 10:38:50,612 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:50,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:38:50,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:38:50,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:38:50,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:38:50,613 INFO L87 Difference]: Start difference. First operand 2827 states and 12239 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:51,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:51,240 INFO L93 Difference]: Finished difference Result 2988 states and 12887 transitions. [2022-11-20 10:38:51,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:38:51,242 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:38:51,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:51,249 INFO L225 Difference]: With dead ends: 2988 [2022-11-20 10:38:51,249 INFO L226 Difference]: Without dead ends: 2988 [2022-11-20 10:38:51,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:38:51,249 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 31 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:51,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 16 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 30 Unchecked, 0.5s Time] [2022-11-20 10:38:51,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2988 states. [2022-11-20 10:38:51,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2988 to 2856. [2022-11-20 10:38:51,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2856 states, 2849 states have (on average 4.336609336609337) internal successors, (12355), 2855 states have internal predecessors, (12355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:51,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2856 states to 2856 states and 12355 transitions. [2022-11-20 10:38:51,302 INFO L78 Accepts]: Start accepts. Automaton has 2856 states and 12355 transitions. Word has length 13 [2022-11-20 10:38:51,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:51,302 INFO L495 AbstractCegarLoop]: Abstraction has 2856 states and 12355 transitions. [2022-11-20 10:38:51,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:51,302 INFO L276 IsEmpty]: Start isEmpty. Operand 2856 states and 12355 transitions. [2022-11-20 10:38:51,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:38:51,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:51,304 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:51,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 10:38:51,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:51,504 INFO L420 AbstractCegarLoop]: === Iteration 201 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:38:51,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:51,505 INFO L85 PathProgramCache]: Analyzing trace with hash -807688677, now seen corresponding path program 3 times [2022-11-20 10:38:51,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:38:51,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1791238669] [2022-11-20 10:38:51,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:38:51,505 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 [2022-11-20 10:38:51,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:38:51,506 INFO L229 MonitoredProcess]: Starting monitored process 202 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:38:51,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:38:51,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:38:51,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:38:51,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:38:51,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:52,107 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:38:52,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:38:52,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:52,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:52,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:52,965 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:38:52,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1791238669] [2022-11-20 10:38:52,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1791238669] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:52,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:38:52,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:38:52,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956891317] [2022-11-20 10:38:52,966 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:52,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:38:52,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:38:52,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:38:52,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:38:52,966 INFO L87 Difference]: Start difference. First operand 2856 states and 12355 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:53,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:53,592 INFO L93 Difference]: Finished difference Result 3104 states and 13411 transitions. [2022-11-20 10:38:53,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:38:53,593 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:38:53,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:53,601 INFO L225 Difference]: With dead ends: 3104 [2022-11-20 10:38:53,601 INFO L226 Difference]: Without dead ends: 3104 [2022-11-20 10:38:53,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:38:53,601 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 36 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:53,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 18 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 34 Unchecked, 0.6s Time] [2022-11-20 10:38:53,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3104 states. [2022-11-20 10:38:53,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3104 to 2885. [2022-11-20 10:38:53,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2885 states, 2878 states have (on average 4.338776928422516) internal successors, (12487), 2884 states have internal predecessors, (12487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:53,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2885 states to 2885 states and 12487 transitions. [2022-11-20 10:38:53,655 INFO L78 Accepts]: Start accepts. Automaton has 2885 states and 12487 transitions. Word has length 13 [2022-11-20 10:38:53,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:53,655 INFO L495 AbstractCegarLoop]: Abstraction has 2885 states and 12487 transitions. [2022-11-20 10:38:53,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:53,655 INFO L276 IsEmpty]: Start isEmpty. Operand 2885 states and 12487 transitions. [2022-11-20 10:38:53,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:38:53,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:53,657 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:53,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:53,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:53,857 INFO L420 AbstractCegarLoop]: === Iteration 202 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:38:53,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:53,858 INFO L85 PathProgramCache]: Analyzing trace with hash -928711251, now seen corresponding path program 1 times [2022-11-20 10:38:53,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:38:53,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [484372157] [2022-11-20 10:38:53,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:53,858 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 [2022-11-20 10:38:53,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:38:53,859 INFO L229 MonitoredProcess]: Starting monitored process 203 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:38:53,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:38:54,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:54,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:38:54,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:54,426 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:38:54,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:38:54,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:54,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:55,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:55,323 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:38:55,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [484372157] [2022-11-20 10:38:55,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [484372157] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:55,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:38:55,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:38:55,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037407931] [2022-11-20 10:38:55,323 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:55,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:38:55,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:38:55,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:38:55,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:38:55,324 INFO L87 Difference]: Start difference. First operand 2885 states and 12487 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:55,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:55,774 INFO L93 Difference]: Finished difference Result 3046 states and 13224 transitions. [2022-11-20 10:38:55,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:38:55,776 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:38:55,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:55,783 INFO L225 Difference]: With dead ends: 3046 [2022-11-20 10:38:55,783 INFO L226 Difference]: Without dead ends: 3046 [2022-11-20 10:38:55,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:38:55,783 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:55,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 21 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 17 Unchecked, 0.4s Time] [2022-11-20 10:38:55,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3046 states. [2022-11-20 10:38:55,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3046 to 2893. [2022-11-20 10:38:55,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2893 states, 2886 states have (on average 4.335065835065835) internal successors, (12511), 2892 states have internal predecessors, (12511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:55,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2893 states to 2893 states and 12511 transitions. [2022-11-20 10:38:55,835 INFO L78 Accepts]: Start accepts. Automaton has 2893 states and 12511 transitions. Word has length 13 [2022-11-20 10:38:55,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:55,835 INFO L495 AbstractCegarLoop]: Abstraction has 2893 states and 12511 transitions. [2022-11-20 10:38:55,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:55,836 INFO L276 IsEmpty]: Start isEmpty. Operand 2893 states and 12511 transitions. [2022-11-20 10:38:55,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:38:55,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:55,837 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:55,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 10:38:56,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:56,038 INFO L420 AbstractCegarLoop]: === Iteration 203 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:38:56,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:56,038 INFO L85 PathProgramCache]: Analyzing trace with hash -928145222, now seen corresponding path program 1 times [2022-11-20 10:38:56,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:38:56,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1390752957] [2022-11-20 10:38:56,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:56,039 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:38:56,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:38:56,039 INFO L229 MonitoredProcess]: Starting monitored process 204 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:38:56,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:38:56,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:56,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 10:38:56,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:56,579 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:38:56,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:38:56,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:56,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:57,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:38:57,871 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:38:57,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1390752957] [2022-11-20 10:38:57,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1390752957] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:57,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:38:57,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 10:38:57,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785002877] [2022-11-20 10:38:57,871 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:57,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:38:57,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:38:57,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:38:57,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:38:57,872 INFO L87 Difference]: Start difference. First operand 2893 states and 12511 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) [2022-11-20 10:39:02,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:39:02,673 INFO L93 Difference]: Finished difference Result 7397 states and 33906 transitions. [2022-11-20 10:39:02,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 10:39:02,674 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 [2022-11-20 10:39:02,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:39:02,696 INFO L225 Difference]: With dead ends: 7397 [2022-11-20 10:39:02,696 INFO L226 Difference]: Without dead ends: 7397 [2022-11-20 10:39:02,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=241, Invalid=629, Unknown=0, NotChecked=0, Total=870 [2022-11-20 10:39:02,697 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 275 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:39:02,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 71 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 349 Invalid, 0 Unknown, 154 Unchecked, 2.2s Time] [2022-11-20 10:39:02,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7397 states. [2022-11-20 10:39:02,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7397 to 3237. [2022-11-20 10:39:02,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3230 states have (on average 4.445510835913312) internal successors, (14359), 3236 states have internal predecessors, (14359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:02,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 14359 transitions. [2022-11-20 10:39:02,803 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 14359 transitions. Word has length 13 [2022-11-20 10:39:02,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:39:02,803 INFO L495 AbstractCegarLoop]: Abstraction has 3237 states and 14359 transitions. [2022-11-20 10:39:02,803 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) [2022-11-20 10:39:02,803 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 14359 transitions. [2022-11-20 10:39:02,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:39:02,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:39:02,805 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:39:02,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 10:39:03,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:39:03,006 INFO L420 AbstractCegarLoop]: === Iteration 204 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:39:03,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:03,006 INFO L85 PathProgramCache]: Analyzing trace with hash -933156837, now seen corresponding path program 4 times [2022-11-20 10:39:03,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:39:03,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [402818686] [2022-11-20 10:39:03,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:39:03,007 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:39:03,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:39:03,008 INFO L229 MonitoredProcess]: Starting monitored process 205 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:39:03,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:39:03,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:39:03,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:39:03,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:39:03,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:39:03,542 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:39:03,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:39:03,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:39:03,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:39:04,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:39:04,506 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:39:04,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [402818686] [2022-11-20 10:39:04,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [402818686] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:39:04,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:39:04,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:39:04,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15217673] [2022-11-20 10:39:04,507 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:39:04,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:39:04,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:39:04,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:39:04,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:39:04,507 INFO L87 Difference]: Start difference. First operand 3237 states and 14359 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:04,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:39:04,700 INFO L93 Difference]: Finished difference Result 3375 states and 15079 transitions. [2022-11-20 10:39:04,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:39:04,701 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:39:04,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:39:04,713 INFO L225 Difference]: With dead ends: 3375 [2022-11-20 10:39:04,713 INFO L226 Difference]: Without dead ends: 3375 [2022-11-20 10:39:04,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:39:04,714 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:39:04,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 26 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-20 10:39:04,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2022-11-20 10:39:04,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 3245. [2022-11-20 10:39:04,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3245 states, 3238 states have (on average 4.44935145151328) internal successors, (14407), 3244 states have internal predecessors, (14407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:04,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3245 states to 3245 states and 14407 transitions. [2022-11-20 10:39:04,776 INFO L78 Accepts]: Start accepts. Automaton has 3245 states and 14407 transitions. Word has length 13 [2022-11-20 10:39:04,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:39:04,776 INFO L495 AbstractCegarLoop]: Abstraction has 3245 states and 14407 transitions. [2022-11-20 10:39:04,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:04,776 INFO L276 IsEmpty]: Start isEmpty. Operand 3245 states and 14407 transitions. [2022-11-20 10:39:04,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:39:04,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:39:04,778 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:39:04,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:39:04,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:39:04,978 INFO L420 AbstractCegarLoop]: === Iteration 205 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:39:04,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:04,979 INFO L85 PathProgramCache]: Analyzing trace with hash -933136377, now seen corresponding path program 5 times [2022-11-20 10:39:04,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:39:04,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1514708237] [2022-11-20 10:39:04,979 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:39:04,979 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:39:04,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:39:04,980 INFO L229 MonitoredProcess]: Starting monitored process 206 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:39:04,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 10:39:05,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:39:05,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:39:05,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:39:05,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:39:05,525 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:39:05,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:39:05,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:39:05,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:39:06,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:39:06,437 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:39:06,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1514708237] [2022-11-20 10:39:06,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1514708237] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:39:06,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:39:06,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:39:06,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001016579] [2022-11-20 10:39:06,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:39:06,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:39:06,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:39:06,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:39:06,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:39:06,438 INFO L87 Difference]: Start difference. First operand 3245 states and 14407 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:06,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:39:06,901 INFO L93 Difference]: Finished difference Result 3365 states and 15023 transitions. [2022-11-20 10:39:06,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:39:06,902 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:39:06,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:39:06,910 INFO L225 Difference]: With dead ends: 3365 [2022-11-20 10:39:06,910 INFO L226 Difference]: Without dead ends: 3365 [2022-11-20 10:39:06,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:39:06,911 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:39:06,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 20 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 16 Unchecked, 0.4s Time] [2022-11-20 10:39:06,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3365 states. [2022-11-20 10:39:06,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3365 to 3245. [2022-11-20 10:39:06,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3245 states, 3238 states have (on average 4.448733786287832) internal successors, (14405), 3244 states have internal predecessors, (14405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:06,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3245 states to 3245 states and 14405 transitions. [2022-11-20 10:39:06,997 INFO L78 Accepts]: Start accepts. Automaton has 3245 states and 14405 transitions. Word has length 13 [2022-11-20 10:39:06,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:39:06,998 INFO L495 AbstractCegarLoop]: Abstraction has 3245 states and 14405 transitions. [2022-11-20 10:39:06,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:06,998 INFO L276 IsEmpty]: Start isEmpty. Operand 3245 states and 14405 transitions. [2022-11-20 10:39:06,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:39:06,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:39:06,999 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:39:07,008 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 10:39:07,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:39:07,200 INFO L420 AbstractCegarLoop]: === Iteration 206 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:39:07,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:07,200 INFO L85 PathProgramCache]: Analyzing trace with hash -933136191, now seen corresponding path program 2 times [2022-11-20 10:39:07,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:39:07,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1247866221] [2022-11-20 10:39:07,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:39:07,201 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:39:07,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:39:07,202 INFO L229 MonitoredProcess]: Starting monitored process 207 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:39:07,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (207)] Waiting until timeout for monitored process [2022-11-20 10:39:07,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:39:07,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:39:07,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:39:07,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:39:07,753 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:39:07,753 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 [2022-11-20 10:39:08,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:39:08,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:39:08,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:39:08,610 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:39:08,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1247866221] [2022-11-20 10:39:08,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1247866221] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:39:08,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:39:08,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 10:39:08,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659146020] [2022-11-20 10:39:08,611 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:39:08,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:39:08,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:39:08,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:39:08,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:39:08,612 INFO L87 Difference]: Start difference. First operand 3245 states and 14405 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:09,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:39:09,069 INFO L93 Difference]: Finished difference Result 3333 states and 14851 transitions. [2022-11-20 10:39:09,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:39:09,071 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:39:09,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:39:09,079 INFO L225 Difference]: With dead ends: 3333 [2022-11-20 10:39:09,079 INFO L226 Difference]: Without dead ends: 3333 [2022-11-20 10:39:09,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:39:09,080 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:39:09,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 16 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 15 Unchecked, 0.4s Time] [2022-11-20 10:39:09,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3333 states. [2022-11-20 10:39:09,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3333 to 3245. [2022-11-20 10:39:09,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3245 states, 3238 states have (on average 4.448733786287832) internal successors, (14405), 3244 states have internal predecessors, (14405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:09,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3245 states to 3245 states and 14405 transitions. [2022-11-20 10:39:09,139 INFO L78 Accepts]: Start accepts. Automaton has 3245 states and 14405 transitions. Word has length 13 [2022-11-20 10:39:09,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:39:09,140 INFO L495 AbstractCegarLoop]: Abstraction has 3245 states and 14405 transitions. [2022-11-20 10:39:09,140 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) [2022-11-20 10:39:09,140 INFO L276 IsEmpty]: Start isEmpty. Operand 3245 states and 14405 transitions. [2022-11-20 10:39:09,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:39:09,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:39:09,142 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:39:09,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (207)] Ended with exit code 0 [2022-11-20 10:39:09,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:39:09,342 INFO L420 AbstractCegarLoop]: === Iteration 207 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:39:09,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:09,342 INFO L85 PathProgramCache]: Analyzing trace with hash -933135602, now seen corresponding path program 2 times [2022-11-20 10:39:09,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:39:09,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [88862816] [2022-11-20 10:39:09,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:39:09,343 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:39:09,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:39:09,344 INFO L229 MonitoredProcess]: Starting monitored process 208 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:39:09,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (208)] Waiting until timeout for monitored process [2022-11-20 10:39:09,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:39:09,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:39:09,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 10:39:09,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:39:09,932 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:39:09,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:39:10,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:39:10,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:39:11,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:39:11,723 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:39:11,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [88862816] [2022-11-20 10:39:11,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [88862816] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:39:11,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:39:11,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 10:39:11,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627487381] [2022-11-20 10:39:11,723 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:39:11,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 10:39:11,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:39:11,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 10:39:11,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:39:11,724 INFO L87 Difference]: Start difference. First operand 3245 states and 14405 transitions. Second operand has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:20,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:39:20,134 INFO L93 Difference]: Finished difference Result 7042 states and 30131 transitions. [2022-11-20 10:39:20,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 10:39:20,136 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:39:20,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:39:20,154 INFO L225 Difference]: With dead ends: 7042 [2022-11-20 10:39:20,155 INFO L226 Difference]: Without dead ends: 7042 [2022-11-20 10:39:20,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=341, Invalid=991, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 10:39:20,155 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 366 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 259 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:39:20,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 79 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 666 Invalid, 0 Unknown, 259 Unchecked, 4.1s Time] [2022-11-20 10:39:20,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7042 states. [2022-11-20 10:39:20,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7042 to 3555. [2022-11-20 10:39:20,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3555 states, 3548 states have (on average 4.499154453213078) internal successors, (15963), 3554 states have internal predecessors, (15963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:20,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3555 states to 3555 states and 15963 transitions. [2022-11-20 10:39:20,253 INFO L78 Accepts]: Start accepts. Automaton has 3555 states and 15963 transitions. Word has length 13 [2022-11-20 10:39:20,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:39:20,253 INFO L495 AbstractCegarLoop]: Abstraction has 3555 states and 15963 transitions. [2022-11-20 10:39:20,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:20,253 INFO L276 IsEmpty]: Start isEmpty. Operand 3555 states and 15963 transitions. [2022-11-20 10:39:20,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:39:20,254 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:39:20,254 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:39:20,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (208)] Ended with exit code 0 [2022-11-20 10:39:20,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:39:20,455 INFO L420 AbstractCegarLoop]: === Iteration 208 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:39:20,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:20,455 INFO L85 PathProgramCache]: Analyzing trace with hash -933132812, now seen corresponding path program 3 times [2022-11-20 10:39:20,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:39:20,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1244662866] [2022-11-20 10:39:20,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:39:20,456 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:39:20,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:39:20,457 INFO L229 MonitoredProcess]: Starting monitored process 209 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:39:20,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (209)] Waiting until timeout for monitored process [2022-11-20 10:39:20,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:39:20,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:39:20,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 10:39:20,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:39:21,024 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:39:21,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:39:21,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:39:21,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:39:22,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:39:22,478 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:39:22,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1244662866] [2022-11-20 10:39:22,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1244662866] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:39:22,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:39:22,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 10:39:22,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329387483] [2022-11-20 10:39:22,479 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:39:22,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:39:22,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:39:22,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:39:22,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:39:22,480 INFO L87 Difference]: Start difference. First operand 3555 states and 15963 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) [2022-11-20 10:39:31,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:39:31,215 INFO L93 Difference]: Finished difference Result 7085 states and 30320 transitions. [2022-11-20 10:39:31,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 10:39:31,217 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 [2022-11-20 10:39:31,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:39:31,237 INFO L225 Difference]: With dead ends: 7085 [2022-11-20 10:39:31,237 INFO L226 Difference]: Without dead ends: 7085 [2022-11-20 10:39:31,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=390, Invalid=870, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 10:39:31,237 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 437 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:39:31,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 43 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 399 Invalid, 0 Unknown, 166 Unchecked, 3.8s Time] [2022-11-20 10:39:31,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7085 states. [2022-11-20 10:39:31,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7085 to 3000. [2022-11-20 10:39:31,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3000 states, 2993 states have (on average 4.3488138990978955) internal successors, (13016), 2999 states have internal predecessors, (13016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:31,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3000 states to 3000 states and 13016 transitions. [2022-11-20 10:39:31,322 INFO L78 Accepts]: Start accepts. Automaton has 3000 states and 13016 transitions. Word has length 13 [2022-11-20 10:39:31,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:39:31,323 INFO L495 AbstractCegarLoop]: Abstraction has 3000 states and 13016 transitions. [2022-11-20 10:39:31,323 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) [2022-11-20 10:39:31,323 INFO L276 IsEmpty]: Start isEmpty. Operand 3000 states and 13016 transitions. [2022-11-20 10:39:31,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:39:31,324 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:39:31,325 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1] [2022-11-20 10:39:31,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (209)] Forceful destruction successful, exit code 0 [2022-11-20 10:39:31,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:39:31,538 INFO L420 AbstractCegarLoop]: === Iteration 209 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:39:31,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:31,539 INFO L85 PathProgramCache]: Analyzing trace with hash -256592796, now seen corresponding path program 3 times [2022-11-20 10:39:31,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:39:31,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2058258760] [2022-11-20 10:39:31,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:39:31,540 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 [2022-11-20 10:39:31,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:39:31,541 INFO L229 MonitoredProcess]: Starting monitored process 210 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:39:31,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (210)] Waiting until timeout for monitored process [2022-11-20 10:39:32,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 10:39:32,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:39:32,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 10:39:32,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:39:32,232 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:39:32,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:39:32,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 10:39:32,506 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:39:32,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:39:32,955 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:39:32,955 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:39:32,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2058258760] [2022-11-20 10:39:32,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2058258760] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:39:32,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:39:32,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-20 10:39:32,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410786823] [2022-11-20 10:39:32,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:39:32,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 10:39:32,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:39:32,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 10:39:32,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:39:32,956 INFO L87 Difference]: Start difference. First operand 3000 states and 13016 transitions. Second operand has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:36,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:39:36,449 INFO L93 Difference]: Finished difference Result 3570 states and 15056 transitions. [2022-11-20 10:39:36,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 10:39:36,450 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 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 13 [2022-11-20 10:39:36,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:39:36,462 INFO L225 Difference]: With dead ends: 3570 [2022-11-20 10:39:36,462 INFO L226 Difference]: Without dead ends: 3570 [2022-11-20 10:39:36,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2022-11-20 10:39:36,462 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 527 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:39:36,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 150 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-20 10:39:36,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3570 states. [2022-11-20 10:39:36,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3570 to 3050. [2022-11-20 10:39:36,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3050 states, 3043 states have (on average 4.351298061123891) internal successors, (13241), 3049 states have internal predecessors, (13241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:36,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3050 states to 3050 states and 13241 transitions. [2022-11-20 10:39:36,532 INFO L78 Accepts]: Start accepts. Automaton has 3050 states and 13241 transitions. Word has length 13 [2022-11-20 10:39:36,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:39:36,533 INFO L495 AbstractCegarLoop]: Abstraction has 3050 states and 13241 transitions. [2022-11-20 10:39:36,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:36,533 INFO L276 IsEmpty]: Start isEmpty. Operand 3050 states and 13241 transitions. [2022-11-20 10:39:36,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:39:36,534 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:39:36,534 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:39:36,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (210)] Forceful destruction successful, exit code 0 [2022-11-20 10:39:36,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:39:36,735 INFO L420 AbstractCegarLoop]: === Iteration 210 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:39:36,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:36,735 INFO L85 PathProgramCache]: Analyzing trace with hash 197802532, now seen corresponding path program 7 times [2022-11-20 10:39:36,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:39:36,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [283853472] [2022-11-20 10:39:36,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:39:36,736 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:39:36,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:39:36,737 INFO L229 MonitoredProcess]: Starting monitored process 211 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:39:36,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (211)] Waiting until timeout for monitored process [2022-11-20 10:39:37,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:37,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 10:39:37,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:39:37,361 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:39:37,361 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 [2022-11-20 10:39:37,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:39:37,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:39:39,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:39:39,558 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:39:39,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [283853472] [2022-11-20 10:39:39,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [283853472] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:39:39,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:39:39,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 10:39:39,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202655434] [2022-11-20 10:39:39,559 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:39:39,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 10:39:39,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:39:39,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 10:39:39,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:39:39,560 INFO L87 Difference]: Start difference. First operand 3050 states and 13241 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:42,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:39:42,817 INFO L93 Difference]: Finished difference Result 3157 states and 13460 transitions. [2022-11-20 10:39:42,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 10:39:42,819 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:39:42,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:39:42,829 INFO L225 Difference]: With dead ends: 3157 [2022-11-20 10:39:42,829 INFO L226 Difference]: Without dead ends: 3157 [2022-11-20 10:39:42,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2022-11-20 10:39:42,829 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 292 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:39:42,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 109 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 271 Invalid, 0 Unknown, 90 Unchecked, 1.5s Time] [2022-11-20 10:39:42,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3157 states. [2022-11-20 10:39:42,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3157 to 3052. [2022-11-20 10:39:42,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3052 states, 3045 states have (on average 4.350410509031199) internal successors, (13247), 3051 states have internal predecessors, (13247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:42,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3052 states to 3052 states and 13247 transitions. [2022-11-20 10:39:42,899 INFO L78 Accepts]: Start accepts. Automaton has 3052 states and 13247 transitions. Word has length 13 [2022-11-20 10:39:42,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:39:42,899 INFO L495 AbstractCegarLoop]: Abstraction has 3052 states and 13247 transitions. [2022-11-20 10:39:42,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:42,899 INFO L276 IsEmpty]: Start isEmpty. Operand 3052 states and 13247 transitions. [2022-11-20 10:39:42,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:39:42,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:39:42,901 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:39:42,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (211)] Ended with exit code 0 [2022-11-20 10:39:43,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:39:43,103 INFO L420 AbstractCegarLoop]: === Iteration 211 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:39:43,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:43,103 INFO L85 PathProgramCache]: Analyzing trace with hash -360328222, now seen corresponding path program 8 times [2022-11-20 10:39:43,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:39:43,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1039236610] [2022-11-20 10:39:43,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:39:43,104 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:39:43,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:39:43,105 INFO L229 MonitoredProcess]: Starting monitored process 212 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:39:43,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (212)] Waiting until timeout for monitored process [2022-11-20 10:39:43,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:39:43,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:39:43,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 10:39:43,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:39:43,729 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:39:43,729 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 [2022-11-20 10:39:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:39:44,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:39:46,024 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:39:46,024 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:39:46,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1039236610] [2022-11-20 10:39:46,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1039236610] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:39:46,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:39:46,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 10:39:46,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402110767] [2022-11-20 10:39:46,025 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:39:46,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 10:39:46,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:39:46,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 10:39:46,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:39:46,026 INFO L87 Difference]: Start difference. First operand 3052 states and 13247 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:53,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:39:53,067 INFO L93 Difference]: Finished difference Result 3612 states and 14862 transitions. [2022-11-20 10:39:53,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 10:39:53,069 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:39:53,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:39:53,077 INFO L225 Difference]: With dead ends: 3612 [2022-11-20 10:39:53,078 INFO L226 Difference]: Without dead ends: 3612 [2022-11-20 10:39:53,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2022-11-20 10:39:53,078 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 271 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:39:53,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 155 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 744 Invalid, 0 Unknown, 151 Unchecked, 4.2s Time] [2022-11-20 10:39:53,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3612 states. [2022-11-20 10:39:53,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3612 to 3054. [2022-11-20 10:39:53,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3054 states, 3047 states have (on average 4.349524122087299) internal successors, (13253), 3053 states have internal predecessors, (13253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:53,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3054 states to 3054 states and 13253 transitions. [2022-11-20 10:39:53,140 INFO L78 Accepts]: Start accepts. Automaton has 3054 states and 13253 transitions. Word has length 13 [2022-11-20 10:39:53,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:39:53,140 INFO L495 AbstractCegarLoop]: Abstraction has 3054 states and 13253 transitions. [2022-11-20 10:39:53,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:53,141 INFO L276 IsEmpty]: Start isEmpty. Operand 3054 states and 13253 transitions. [2022-11-20 10:39:53,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:39:53,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:39:53,142 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:39:53,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (212)] Ended with exit code 0 [2022-11-20 10:39:53,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:39:53,343 INFO L420 AbstractCegarLoop]: === Iteration 212 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:39:53,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:53,343 INFO L85 PathProgramCache]: Analyzing trace with hash -360184072, now seen corresponding path program 9 times [2022-11-20 10:39:53,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:39:53,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1970740312] [2022-11-20 10:39:53,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:39:53,344 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 [2022-11-20 10:39:53,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:39:53,345 INFO L229 MonitoredProcess]: Starting monitored process 213 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:39:53,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (213)] Waiting until timeout for monitored process [2022-11-20 10:39:53,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 10:39:53,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:39:53,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:39:53,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:39:54,026 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:39:54,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:39:54,445 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:39:54,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:39:55,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:39:55,023 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:39:55,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1970740312] [2022-11-20 10:39:55,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1970740312] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:39:55,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:39:55,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-20 10:39:55,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310759238] [2022-11-20 10:39:55,024 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:39:55,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 10:39:55,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:39:55,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 10:39:55,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:39:55,024 INFO L87 Difference]: Start difference. First operand 3054 states and 13253 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:01,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:40:01,552 INFO L93 Difference]: Finished difference Result 3461 states and 14162 transitions. [2022-11-20 10:40:01,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 10:40:01,553 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:40:01,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:40:01,564 INFO L225 Difference]: With dead ends: 3461 [2022-11-20 10:40:01,564 INFO L226 Difference]: Without dead ends: 3461 [2022-11-20 10:40:01,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2022-11-20 10:40:01,565 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 481 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 408 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:40:01,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [481 Valid, 157 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 693 Invalid, 0 Unknown, 408 Unchecked, 5.4s Time] [2022-11-20 10:40:01,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3461 states. [2022-11-20 10:40:01,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3461 to 3066. [2022-11-20 10:40:01,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3066 states, 3059 states have (on average 4.345537757437071) internal successors, (13293), 3065 states have internal predecessors, (13293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:01,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3066 states to 3066 states and 13293 transitions. [2022-11-20 10:40:01,651 INFO L78 Accepts]: Start accepts. Automaton has 3066 states and 13293 transitions. Word has length 13 [2022-11-20 10:40:01,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:40:01,651 INFO L495 AbstractCegarLoop]: Abstraction has 3066 states and 13293 transitions. [2022-11-20 10:40:01,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:01,651 INFO L276 IsEmpty]: Start isEmpty. Operand 3066 states and 13293 transitions. [2022-11-20 10:40:01,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:40:01,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:40:01,654 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:40:01,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (213)] Ended with exit code 0 [2022-11-20 10:40:01,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:40:01,854 INFO L420 AbstractCegarLoop]: === Iteration 213 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:40:01,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:40:01,855 INFO L85 PathProgramCache]: Analyzing trace with hash -355715422, now seen corresponding path program 10 times [2022-11-20 10:40:01,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:40:01,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [534180842] [2022-11-20 10:40:01,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:40:01,855 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:40:01,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:40:01,857 INFO L229 MonitoredProcess]: Starting monitored process 214 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:40:01,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (214)] Waiting until timeout for monitored process [2022-11-20 10:40:02,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:40:02,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:40:02,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 10:40:02,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:40:02,488 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:40:02,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:40:02,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:40:02,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:40:04,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:40:04,879 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:40:04,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [534180842] [2022-11-20 10:40:04,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [534180842] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:40:04,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:40:04,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 10:40:04,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427310061] [2022-11-20 10:40:04,879 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:40:04,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 10:40:04,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:40:04,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 10:40:04,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:40:04,880 INFO L87 Difference]: Start difference. First operand 3066 states and 13293 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:14,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:40:14,307 INFO L93 Difference]: Finished difference Result 3737 states and 15067 transitions. [2022-11-20 10:40:14,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 10:40:14,309 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:40:14,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:40:14,319 INFO L225 Difference]: With dead ends: 3737 [2022-11-20 10:40:14,319 INFO L226 Difference]: Without dead ends: 3737 [2022-11-20 10:40:14,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=153, Invalid=659, Unknown=0, NotChecked=0, Total=812 [2022-11-20 10:40:14,319 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 317 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 1228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 407 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:40:14,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 191 Invalid, 1228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 813 Invalid, 0 Unknown, 407 Unchecked, 5.8s Time] [2022-11-20 10:40:14,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3737 states. [2022-11-20 10:40:14,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3737 to 3086. [2022-11-20 10:40:14,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3086 states, 3079 states have (on average 4.343293277038) internal successors, (13373), 3085 states have internal predecessors, (13373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:14,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3086 states to 3086 states and 13373 transitions. [2022-11-20 10:40:14,384 INFO L78 Accepts]: Start accepts. Automaton has 3086 states and 13373 transitions. Word has length 13 [2022-11-20 10:40:14,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:40:14,385 INFO L495 AbstractCegarLoop]: Abstraction has 3086 states and 13373 transitions. [2022-11-20 10:40:14,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:14,385 INFO L276 IsEmpty]: Start isEmpty. Operand 3086 states and 13373 transitions. [2022-11-20 10:40:14,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:40:14,386 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:40:14,387 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:40:14,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (214)] Ended with exit code 0 [2022-11-20 10:40:14,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:40:14,587 INFO L420 AbstractCegarLoop]: === Iteration 214 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:40:14,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:40:14,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1287675897, now seen corresponding path program 4 times [2022-11-20 10:40:14,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:40:14,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1076891680] [2022-11-20 10:40:14,588 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:40:14,588 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:40:14,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:40:14,589 INFO L229 MonitoredProcess]: Starting monitored process 215 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:40:14,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (215)] Waiting until timeout for monitored process [2022-11-20 10:40:15,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:40:15,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:40:15,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 10:40:15,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:40:15,185 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:40:15,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:40:15,606 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:40:15,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:40:16,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:40:16,686 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:40:16,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1076891680] [2022-11-20 10:40:16,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1076891680] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:40:16,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:40:16,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 10:40:16,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269342121] [2022-11-20 10:40:16,687 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:40:16,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:40:16,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:40:16,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:40:16,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:40:16,687 INFO L87 Difference]: Start difference. First operand 3086 states and 13373 transitions. Second operand has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:18,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:40:18,204 INFO L93 Difference]: Finished difference Result 3102 states and 13437 transitions. [2022-11-20 10:40:18,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 10:40:18,205 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 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 13 [2022-11-20 10:40:18,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:40:18,214 INFO L225 Difference]: With dead ends: 3102 [2022-11-20 10:40:18,214 INFO L226 Difference]: Without dead ends: 3102 [2022-11-20 10:40:18,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:40:18,214 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 24 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:40:18,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 43 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 133 Invalid, 0 Unknown, 12 Unchecked, 0.8s Time] [2022-11-20 10:40:18,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3102 states. [2022-11-20 10:40:18,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3102 to 3102. [2022-11-20 10:40:18,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3102 states, 3095 states have (on average 4.341518578352181) internal successors, (13437), 3101 states have internal predecessors, (13437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:18,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3102 states to 3102 states and 13437 transitions. [2022-11-20 10:40:18,272 INFO L78 Accepts]: Start accepts. Automaton has 3102 states and 13437 transitions. Word has length 13 [2022-11-20 10:40:18,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:40:18,272 INFO L495 AbstractCegarLoop]: Abstraction has 3102 states and 13437 transitions. [2022-11-20 10:40:18,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:18,272 INFO L276 IsEmpty]: Start isEmpty. Operand 3102 states and 13437 transitions. [2022-11-20 10:40:18,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:40:18,274 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:40:18,274 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2022-11-20 10:40:18,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (215)] Ended with exit code 0 [2022-11-20 10:40:18,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:40:18,479 INFO L420 AbstractCegarLoop]: === Iteration 215 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:40:18,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:40:18,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1728358354, now seen corresponding path program 3 times [2022-11-20 10:40:18,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:40:18,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1001671730] [2022-11-20 10:40:18,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:40:18,480 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:40:18,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:40:18,481 INFO L229 MonitoredProcess]: Starting monitored process 216 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:40:18,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (216)] Waiting until timeout for monitored process [2022-11-20 10:40:18,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 10:40:18,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:40:18,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:40:19,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:40:19,135 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:40:19,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:40:19,444 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 10:40:19,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:40:20,873 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 10:40:20,873 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:40:20,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1001671730] [2022-11-20 10:40:20,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1001671730] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:40:20,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:40:20,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 10:40:20,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395630240] [2022-11-20 10:40:20,874 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:40:20,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 10:40:20,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:40:20,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 10:40:20,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:40:20,874 INFO L87 Difference]: Start difference. First operand 3102 states and 13437 transitions. Second operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:31,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:40:31,772 INFO L93 Difference]: Finished difference Result 6854 states and 30022 transitions. [2022-11-20 10:40:31,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 10:40:31,774 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.3333333333333333) 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 13 [2022-11-20 10:40:31,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:40:31,795 INFO L225 Difference]: With dead ends: 6854 [2022-11-20 10:40:31,795 INFO L226 Difference]: Without dead ends: 6854 [2022-11-20 10:40:31,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2022-11-20 10:40:31,795 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 906 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:40:31,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [906 Valid, 71 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-20 10:40:31,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6854 states. [2022-11-20 10:40:31,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6854 to 4024. [2022-11-20 10:40:31,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4024 states, 4017 states have (on average 4.554642768235001) internal successors, (18296), 4023 states have internal predecessors, (18296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:31,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4024 states to 4024 states and 18296 transitions. [2022-11-20 10:40:31,917 INFO L78 Accepts]: Start accepts. Automaton has 4024 states and 18296 transitions. Word has length 13 [2022-11-20 10:40:31,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:40:31,917 INFO L495 AbstractCegarLoop]: Abstraction has 4024 states and 18296 transitions. [2022-11-20 10:40:31,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:31,917 INFO L276 IsEmpty]: Start isEmpty. Operand 4024 states and 18296 transitions. [2022-11-20 10:40:31,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:40:31,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:40:31,920 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2022-11-20 10:40:31,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (216)] Ended with exit code 0 [2022-11-20 10:40:32,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:40:32,121 INFO L420 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:40:32,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:40:32,121 INFO L85 PathProgramCache]: Analyzing trace with hash -158609518, now seen corresponding path program 2 times [2022-11-20 10:40:32,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:40:32,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1677957969] [2022-11-20 10:40:32,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:40:32,122 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:40:32,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:40:32,123 INFO L229 MonitoredProcess]: Starting monitored process 217 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:40:32,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (217)] Waiting until timeout for monitored process [2022-11-20 10:40:32,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:40:32,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:40:32,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 10:40:32,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:40:32,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:40:32,714 INFO L321 Elim1Store]: treesize reduction 59, result has 36.6 percent of original size [2022-11-20 10:40:32,714 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 15 treesize of output 39 [2022-11-20 10:40:32,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-20 10:40:33,001 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 10:40:33,002 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:40:33,002 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:40:33,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1677957969] [2022-11-20 10:40:33,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1677957969] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:40:33,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:40:33,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:40:33,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474140228] [2022-11-20 10:40:33,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:40:33,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:40:33,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:40:33,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:40:33,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:40:33,003 INFO L87 Difference]: Start difference. First operand 4024 states and 18296 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:33,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:40:33,447 INFO L93 Difference]: Finished difference Result 4080 states and 18427 transitions. [2022-11-20 10:40:33,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:40:33,449 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 10:40:33,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:40:33,461 INFO L225 Difference]: With dead ends: 4080 [2022-11-20 10:40:33,461 INFO L226 Difference]: Without dead ends: 4080 [2022-11-20 10:40:33,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:40:33,462 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 110 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:40:33,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 7 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:40:33,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4080 states. [2022-11-20 10:40:33,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4080 to 3997. [2022-11-20 10:40:33,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3997 states, 3992 states have (on average 4.565380761523046) internal successors, (18225), 3996 states have internal predecessors, (18225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:33,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3997 states to 3997 states and 18225 transitions. [2022-11-20 10:40:33,556 INFO L78 Accepts]: Start accepts. Automaton has 3997 states and 18225 transitions. Word has length 13 [2022-11-20 10:40:33,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:40:33,556 INFO L495 AbstractCegarLoop]: Abstraction has 3997 states and 18225 transitions. [2022-11-20 10:40:33,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:33,556 INFO L276 IsEmpty]: Start isEmpty. Operand 3997 states and 18225 transitions. [2022-11-20 10:40:33,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:40:33,558 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:40:33,558 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:40:33,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (217)] Ended with exit code 0 [2022-11-20 10:40:33,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:40:33,759 INFO L420 AbstractCegarLoop]: === Iteration 217 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:40:33,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:40:33,759 INFO L85 PathProgramCache]: Analyzing trace with hash 930693859, now seen corresponding path program 6 times [2022-11-20 10:40:33,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:40:33,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [552407764] [2022-11-20 10:40:33,760 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:40:33,760 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 [2022-11-20 10:40:33,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:40:33,761 INFO L229 MonitoredProcess]: Starting monitored process 218 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:40:33,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (218)] Waiting until timeout for monitored process [2022-11-20 10:40:34,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 10:40:34,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:40:34,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:40:34,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:40:34,427 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:40:34,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:40:34,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:40:34,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:40:35,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:40:35,875 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:40:35,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [552407764] [2022-11-20 10:40:35,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [552407764] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:40:35,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:40:35,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 10:40:35,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105028414] [2022-11-20 10:40:35,875 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:40:35,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:40:35,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:40:35,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:40:35,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:40:35,876 INFO L87 Difference]: Start difference. First operand 3997 states and 18225 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:37,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:40:37,046 INFO L93 Difference]: Finished difference Result 4076 states and 18484 transitions. [2022-11-20 10:40:37,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 10:40:37,048 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 10:40:37,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:40:37,061 INFO L225 Difference]: With dead ends: 4076 [2022-11-20 10:40:37,062 INFO L226 Difference]: Without dead ends: 4076 [2022-11-20 10:40:37,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:40:37,062 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 89 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:40:37,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 82 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 114 Invalid, 0 Unknown, 53 Unchecked, 0.7s Time] [2022-11-20 10:40:37,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2022-11-20 10:40:37,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 4011. [2022-11-20 10:40:37,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4011 states, 4006 states have (on average 4.565401897154269) internal successors, (18289), 4010 states have internal predecessors, (18289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:37,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4011 states to 4011 states and 18289 transitions. [2022-11-20 10:40:37,155 INFO L78 Accepts]: Start accepts. Automaton has 4011 states and 18289 transitions. Word has length 14 [2022-11-20 10:40:37,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:40:37,155 INFO L495 AbstractCegarLoop]: Abstraction has 4011 states and 18289 transitions. [2022-11-20 10:40:37,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:37,155 INFO L276 IsEmpty]: Start isEmpty. Operand 4011 states and 18289 transitions. [2022-11-20 10:40:37,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:40:37,158 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:40:37,158 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:40:37,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (218)] Ended with exit code 0 [2022-11-20 10:40:37,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:40:37,358 INFO L420 AbstractCegarLoop]: === Iteration 218 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:40:37,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:40:37,359 INFO L85 PathProgramCache]: Analyzing trace with hash 950355919, now seen corresponding path program 7 times [2022-11-20 10:40:37,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:40:37,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [641921468] [2022-11-20 10:40:37,359 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:40:37,359 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:40:37,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:40:37,361 INFO L229 MonitoredProcess]: Starting monitored process 219 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:40:37,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (219)] Waiting until timeout for monitored process [2022-11-20 10:40:37,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:40:37,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:40:37,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:40:38,051 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:40:38,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:40:38,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:40:38,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:40:39,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:40:39,563 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:40:39,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [641921468] [2022-11-20 10:40:39,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [641921468] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:40:39,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:40:39,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 10:40:39,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338223370] [2022-11-20 10:40:39,563 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:40:39,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:40:39,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:40:39,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:40:39,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:40:39,564 INFO L87 Difference]: Start difference. First operand 4011 states and 18289 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:41,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:40:41,025 INFO L93 Difference]: Finished difference Result 4064 states and 18436 transitions. [2022-11-20 10:40:41,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:40:41,026 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 10:40:41,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:40:41,037 INFO L225 Difference]: With dead ends: 4064 [2022-11-20 10:40:41,037 INFO L226 Difference]: Without dead ends: 4064 [2022-11-20 10:40:41,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:40:41,037 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 75 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:40:41,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 81 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 146 Invalid, 0 Unknown, 78 Unchecked, 1.0s Time] [2022-11-20 10:40:41,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4064 states. [2022-11-20 10:40:41,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4064 to 4007. [2022-11-20 10:40:41,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4007 states, 4002 states have (on average 4.566466766616692) internal successors, (18275), 4006 states have internal predecessors, (18275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:41,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4007 states to 4007 states and 18275 transitions. [2022-11-20 10:40:41,143 INFO L78 Accepts]: Start accepts. Automaton has 4007 states and 18275 transitions. Word has length 14 [2022-11-20 10:40:41,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:40:41,144 INFO L495 AbstractCegarLoop]: Abstraction has 4007 states and 18275 transitions. [2022-11-20 10:40:41,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:41,144 INFO L276 IsEmpty]: Start isEmpty. Operand 4007 states and 18275 transitions. [2022-11-20 10:40:41,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:40:41,146 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:40:41,146 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:40:41,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (219)] Forceful destruction successful, exit code 0 [2022-11-20 10:40:41,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:40:41,347 INFO L420 AbstractCegarLoop]: === Iteration 219 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:40:41,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:40:41,347 INFO L85 PathProgramCache]: Analyzing trace with hash 640786369, now seen corresponding path program 4 times [2022-11-20 10:40:41,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:40:41,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1889881558] [2022-11-20 10:40:41,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:40:41,348 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:40:41,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:40:41,349 INFO L229 MonitoredProcess]: Starting monitored process 220 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:40:41,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (220)] Waiting until timeout for monitored process [2022-11-20 10:40:41,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:40:41,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:40:41,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 10:40:41,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:40:41,994 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:40:41,994 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 [2022-11-20 10:40:42,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:40:42,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:40:44,154 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:40:44,155 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:40:44,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1889881558] [2022-11-20 10:40:44,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1889881558] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:40:44,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:40:44,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 10:40:44,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421310031] [2022-11-20 10:40:44,155 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:40:44,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 10:40:44,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:40:44,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 10:40:44,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:40:44,156 INFO L87 Difference]: Start difference. First operand 4007 states and 18275 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:51,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:40:51,626 INFO L93 Difference]: Finished difference Result 4513 states and 19591 transitions. [2022-11-20 10:40:51,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 10:40:51,627 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 10:40:51,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:40:51,641 INFO L225 Difference]: With dead ends: 4513 [2022-11-20 10:40:51,641 INFO L226 Difference]: Without dead ends: 4513 [2022-11-20 10:40:51,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2022-11-20 10:40:51,642 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 373 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 535 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:40:51,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 198 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 745 Invalid, 0 Unknown, 535 Unchecked, 4.4s Time] [2022-11-20 10:40:51,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4513 states. [2022-11-20 10:40:51,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4513 to 4018. [2022-11-20 10:40:51,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4018 states, 4013 states have (on average 4.5639172688761525) internal successors, (18315), 4017 states have internal predecessors, (18315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:51,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4018 states to 4018 states and 18315 transitions. [2022-11-20 10:40:51,733 INFO L78 Accepts]: Start accepts. Automaton has 4018 states and 18315 transitions. Word has length 14 [2022-11-20 10:40:51,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:40:51,733 INFO L495 AbstractCegarLoop]: Abstraction has 4018 states and 18315 transitions. [2022-11-20 10:40:51,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:51,733 INFO L276 IsEmpty]: Start isEmpty. Operand 4018 states and 18315 transitions. [2022-11-20 10:40:51,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:40:51,736 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:40:51,736 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:40:51,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (220)] Ended with exit code 0 [2022-11-20 10:40:51,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:40:51,936 INFO L420 AbstractCegarLoop]: === Iteration 220 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:40:51,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:40:51,937 INFO L85 PathProgramCache]: Analyzing trace with hash 640786431, now seen corresponding path program 5 times [2022-11-20 10:40:51,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:40:51,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [729704394] [2022-11-20 10:40:51,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:40:51,937 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:40:51,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:40:51,938 INFO L229 MonitoredProcess]: Starting monitored process 221 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:40:51,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (221)] Waiting until timeout for monitored process [2022-11-20 10:40:52,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-20 10:40:52,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:40:52,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 10:40:52,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:40:52,646 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:40:52,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:40:53,152 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:40:53,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:40:54,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:40:54,400 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:40:54,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [729704394] [2022-11-20 10:40:54,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [729704394] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:40:54,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:40:54,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:40:54,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225802503] [2022-11-20 10:40:54,401 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:40:54,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:40:54,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:40:54,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:40:54,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:40:54,402 INFO L87 Difference]: Start difference. First operand 4018 states and 18315 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:55,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:40:55,959 INFO L93 Difference]: Finished difference Result 4084 states and 18637 transitions. [2022-11-20 10:40:55,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:40:55,961 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 14 [2022-11-20 10:40:55,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:40:55,973 INFO L225 Difference]: With dead ends: 4084 [2022-11-20 10:40:55,973 INFO L226 Difference]: Without dead ends: 4084 [2022-11-20 10:40:55,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-11-20 10:40:55,973 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 16 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:40:55,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 27 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 30 Unchecked, 0.9s Time] [2022-11-20 10:40:55,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4084 states. [2022-11-20 10:40:56,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4084 to 4072. [2022-11-20 10:40:56,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4072 states, 4067 states have (on average 4.568723875092205) internal successors, (18581), 4071 states have internal predecessors, (18581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:56,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4072 states to 4072 states and 18581 transitions. [2022-11-20 10:40:56,056 INFO L78 Accepts]: Start accepts. Automaton has 4072 states and 18581 transitions. Word has length 14 [2022-11-20 10:40:56,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:40:56,057 INFO L495 AbstractCegarLoop]: Abstraction has 4072 states and 18581 transitions. [2022-11-20 10:40:56,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:40:56,057 INFO L276 IsEmpty]: Start isEmpty. Operand 4072 states and 18581 transitions. [2022-11-20 10:40:56,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:40:56,061 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:40:56,061 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:40:56,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (221)] Ended with exit code 0 [2022-11-20 10:40:56,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:40:56,261 INFO L420 AbstractCegarLoop]: === Iteration 221 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:40:56,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:40:56,262 INFO L85 PathProgramCache]: Analyzing trace with hash 640788291, now seen corresponding path program 6 times [2022-11-20 10:40:56,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:40:56,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1504718734] [2022-11-20 10:40:56,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:40:56,262 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:40:56,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:40:56,263 INFO L229 MonitoredProcess]: Starting monitored process 222 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:40:56,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (222)] Waiting until timeout for monitored process [2022-11-20 10:40:56,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 10:40:56,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:40:56,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 10:40:56,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:40:56,957 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:40:56,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:40:57,611 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:40:57,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:40:59,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:40:59,452 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:40:59,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1504718734] [2022-11-20 10:40:59,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1504718734] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:40:59,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:40:59,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 10:40:59,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837187743] [2022-11-20 10:40:59,453 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:40:59,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 10:40:59,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:40:59,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 10:40:59,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-11-20 10:40:59,453 INFO L87 Difference]: Start difference. First operand 4072 states and 18581 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) [2022-11-20 10:41:00,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:41:00,885 INFO L93 Difference]: Finished difference Result 4198 states and 19137 transitions. [2022-11-20 10:41:00,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 10:41:00,886 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 14 [2022-11-20 10:41:00,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:41:00,900 INFO L225 Difference]: With dead ends: 4198 [2022-11-20 10:41:00,900 INFO L226 Difference]: Without dead ends: 4198 [2022-11-20 10:41:00,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2022-11-20 10:41:00,900 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:41:00,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 33 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 45 Unchecked, 0.5s Time] [2022-11-20 10:41:00,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4198 states. [2022-11-20 10:41:00,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4198 to 4116. [2022-11-20 10:41:00,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4116 states, 4111 states have (on average 4.570907321819509) internal successors, (18791), 4115 states have internal predecessors, (18791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:00,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4116 states to 4116 states and 18791 transitions. [2022-11-20 10:41:00,994 INFO L78 Accepts]: Start accepts. Automaton has 4116 states and 18791 transitions. Word has length 14 [2022-11-20 10:41:00,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:41:00,994 INFO L495 AbstractCegarLoop]: Abstraction has 4116 states and 18791 transitions. [2022-11-20 10:41:00,995 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) [2022-11-20 10:41:00,995 INFO L276 IsEmpty]: Start isEmpty. Operand 4116 states and 18791 transitions. [2022-11-20 10:41:00,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:41:00,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:41:00,998 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:41:01,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (222)] Ended with exit code 0 [2022-11-20 10:41:01,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:41:01,198 INFO L420 AbstractCegarLoop]: === Iteration 222 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:41:01,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:41:01,199 INFO L85 PathProgramCache]: Analyzing trace with hash 640845951, now seen corresponding path program 7 times [2022-11-20 10:41:01,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:41:01,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1972262684] [2022-11-20 10:41:01,199 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:41:01,199 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:41:01,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:41:01,200 INFO L229 MonitoredProcess]: Starting monitored process 223 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:41:01,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (223)] Waiting until timeout for monitored process [2022-11-20 10:41:01,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:41:01,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 10:41:01,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:41:01,885 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:41:01,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:41:02,509 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:41:02,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:41:04,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:41:04,214 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:41:04,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1972262684] [2022-11-20 10:41:04,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1972262684] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:41:04,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:41:04,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 10:41:04,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666018569] [2022-11-20 10:41:04,214 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:41:04,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 10:41:04,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:41:04,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 10:41:04,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2022-11-20 10:41:04,215 INFO L87 Difference]: Start difference. First operand 4116 states and 18791 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) [2022-11-20 10:41:12,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:41:12,157 INFO L93 Difference]: Finished difference Result 7979 states and 36517 transitions. [2022-11-20 10:41:12,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 10:41:12,159 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 14 [2022-11-20 10:41:12,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:41:12,182 INFO L225 Difference]: With dead ends: 7979 [2022-11-20 10:41:12,182 INFO L226 Difference]: Without dead ends: 7979 [2022-11-20 10:41:12,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=209, Invalid=661, Unknown=0, NotChecked=0, Total=870 [2022-11-20 10:41:12,182 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 198 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 305 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:41:12,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 23 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 423 Invalid, 0 Unknown, 305 Unchecked, 4.2s Time] [2022-11-20 10:41:12,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7979 states. [2022-11-20 10:41:12,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7979 to 5148. [2022-11-20 10:41:12,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5148 states, 5143 states have (on average 4.725646509819172) internal successors, (24304), 5147 states have internal predecessors, (24304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:12,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5148 states to 5148 states and 24304 transitions. [2022-11-20 10:41:12,356 INFO L78 Accepts]: Start accepts. Automaton has 5148 states and 24304 transitions. Word has length 14 [2022-11-20 10:41:12,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:41:12,356 INFO L495 AbstractCegarLoop]: Abstraction has 5148 states and 24304 transitions. [2022-11-20 10:41:12,356 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) [2022-11-20 10:41:12,356 INFO L276 IsEmpty]: Start isEmpty. Operand 5148 states and 24304 transitions. [2022-11-20 10:41:12,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:41:12,359 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:41:12,359 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:41:12,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (223)] Ended with exit code 0 [2022-11-20 10:41:12,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:41:12,559 INFO L420 AbstractCegarLoop]: === Iteration 223 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:41:12,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:41:12,560 INFO L85 PathProgramCache]: Analyzing trace with hash 677656343, now seen corresponding path program 8 times [2022-11-20 10:41:12,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:41:12,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [32483362] [2022-11-20 10:41:12,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:41:12,560 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:41:12,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:41:12,561 INFO L229 MonitoredProcess]: Starting monitored process 224 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:41:12,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (224)] Waiting until timeout for monitored process [2022-11-20 10:41:13,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:41:13,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:41:13,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 10:41:13,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:41:13,219 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:41:13,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:41:13,756 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:41:13,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:41:15,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:41:15,257 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:41:15,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [32483362] [2022-11-20 10:41:15,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [32483362] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:41:15,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:41:15,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 10:41:15,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863994938] [2022-11-20 10:41:15,258 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:41:15,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 10:41:15,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:41:15,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 10:41:15,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-11-20 10:41:15,259 INFO L87 Difference]: Start difference. First operand 5148 states and 24304 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) [2022-11-20 10:41:25,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:41:25,726 INFO L93 Difference]: Finished difference Result 9840 states and 46037 transitions. [2022-11-20 10:41:25,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-20 10:41:25,728 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 14 [2022-11-20 10:41:25,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:41:25,767 INFO L225 Difference]: With dead ends: 9840 [2022-11-20 10:41:25,767 INFO L226 Difference]: Without dead ends: 9840 [2022-11-20 10:41:25,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=267, Invalid=855, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 10:41:25,768 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 134 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 328 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:41:25,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 31 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 537 Invalid, 0 Unknown, 328 Unchecked, 5.6s Time] [2022-11-20 10:41:25,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9840 states. [2022-11-20 10:41:26,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9840 to 6005. [2022-11-20 10:41:26,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6005 states, 6000 states have (on average 4.796833333333334) internal successors, (28781), 6004 states have internal predecessors, (28781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:26,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6005 states to 6005 states and 28781 transitions. [2022-11-20 10:41:26,055 INFO L78 Accepts]: Start accepts. Automaton has 6005 states and 28781 transitions. Word has length 14 [2022-11-20 10:41:26,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:41:26,055 INFO L495 AbstractCegarLoop]: Abstraction has 6005 states and 28781 transitions. [2022-11-20 10:41:26,055 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) [2022-11-20 10:41:26,055 INFO L276 IsEmpty]: Start isEmpty. Operand 6005 states and 28781 transitions. [2022-11-20 10:41:26,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:41:26,060 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:41:26,060 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:41:26,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (224)] Ended with exit code 0 [2022-11-20 10:41:26,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:41:26,261 INFO L420 AbstractCegarLoop]: === Iteration 224 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:41:26,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:41:26,261 INFO L85 PathProgramCache]: Analyzing trace with hash 677714003, now seen corresponding path program 9 times [2022-11-20 10:41:26,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:41:26,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [309855291] [2022-11-20 10:41:26,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:41:26,262 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:41:26,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:41:26,263 INFO L229 MonitoredProcess]: Starting monitored process 225 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:41:26,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (225)] Waiting until timeout for monitored process [2022-11-20 10:41:26,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:41:26,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:41:26,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 10:41:26,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:41:27,028 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:41:27,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:41:27,730 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:41:27,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:41:29,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:41:29,566 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:41:29,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [309855291] [2022-11-20 10:41:29,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [309855291] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:41:29,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:41:29,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 10:41:29,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777563575] [2022-11-20 10:41:29,567 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:41:29,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 10:41:29,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:41:29,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 10:41:29,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2022-11-20 10:41:29,567 INFO L87 Difference]: Start difference. First operand 6005 states and 28781 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) [2022-11-20 10:41:39,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:41:39,980 INFO L93 Difference]: Finished difference Result 10396 states and 48742 transitions. [2022-11-20 10:41:39,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-20 10:41:39,983 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 14 [2022-11-20 10:41:39,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:41:40,024 INFO L225 Difference]: With dead ends: 10396 [2022-11-20 10:41:40,024 INFO L226 Difference]: Without dead ends: 10396 [2022-11-20 10:41:40,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=225, Invalid=705, Unknown=0, NotChecked=0, Total=930 [2022-11-20 10:41:40,024 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 146 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 469 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:41:40,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 34 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 540 Invalid, 0 Unknown, 469 Unchecked, 5.6s Time] [2022-11-20 10:41:40,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10396 states. [2022-11-20 10:41:40,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10396 to 6329. [2022-11-20 10:41:40,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6329 states, 6324 states have (on average 4.851043643263757) internal successors, (30678), 6328 states have internal predecessors, (30678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:40,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6329 states to 6329 states and 30678 transitions. [2022-11-20 10:41:40,328 INFO L78 Accepts]: Start accepts. Automaton has 6329 states and 30678 transitions. Word has length 14 [2022-11-20 10:41:40,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:41:40,328 INFO L495 AbstractCegarLoop]: Abstraction has 6329 states and 30678 transitions. [2022-11-20 10:41:40,328 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) [2022-11-20 10:41:40,328 INFO L276 IsEmpty]: Start isEmpty. Operand 6329 states and 30678 transitions. [2022-11-20 10:41:40,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:41:40,332 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:41:40,332 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:41:40,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (225)] Forceful destruction successful, exit code 0 [2022-11-20 10:41:40,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:41:40,533 INFO L420 AbstractCegarLoop]: === Iteration 225 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:41:40,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:41:40,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1942247213, now seen corresponding path program 10 times [2022-11-20 10:41:40,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:41:40,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1793078035] [2022-11-20 10:41:40,534 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:41:40,534 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:41:40,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:41:40,535 INFO L229 MonitoredProcess]: Starting monitored process 226 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:41:40,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (226)] Waiting until timeout for monitored process [2022-11-20 10:41:41,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:41:41,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:41:41,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 10:41:41,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:41:41,322 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:41:41,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:41:41,849 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:41:41,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:41:43,105 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:41:43,105 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:41:43,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1793078035] [2022-11-20 10:41:43,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1793078035] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:41:43,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:41:43,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:41:43,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087105302] [2022-11-20 10:41:43,106 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:41:43,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:41:43,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:41:43,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:41:43,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:41:43,107 INFO L87 Difference]: Start difference. First operand 6329 states and 30678 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:44,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:41:44,832 INFO L93 Difference]: Finished difference Result 6420 states and 31115 transitions. [2022-11-20 10:41:44,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 10:41:44,834 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 14 [2022-11-20 10:41:44,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:41:44,867 INFO L225 Difference]: With dead ends: 6420 [2022-11-20 10:41:44,867 INFO L226 Difference]: Without dead ends: 6420 [2022-11-20 10:41:44,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-11-20 10:41:44,868 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 25 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:41:44,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 36 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 68 Unchecked, 1.1s Time] [2022-11-20 10:41:44,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6420 states. [2022-11-20 10:41:45,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6420 to 6393. [2022-11-20 10:41:45,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6393 states, 6388 states have (on average 4.851283656856606) internal successors, (30990), 6392 states have internal predecessors, (30990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:45,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6393 states to 6393 states and 30990 transitions. [2022-11-20 10:41:45,090 INFO L78 Accepts]: Start accepts. Automaton has 6393 states and 30990 transitions. Word has length 14 [2022-11-20 10:41:45,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:41:45,090 INFO L495 AbstractCegarLoop]: Abstraction has 6393 states and 30990 transitions. [2022-11-20 10:41:45,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:45,091 INFO L276 IsEmpty]: Start isEmpty. Operand 6393 states and 30990 transitions. [2022-11-20 10:41:45,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:41:45,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:41:45,095 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:41:45,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (226)] Ended with exit code 0 [2022-11-20 10:41:45,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:41:45,296 INFO L420 AbstractCegarLoop]: === Iteration 226 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:41:45,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:41:45,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1406872115, now seen corresponding path program 11 times [2022-11-20 10:41:45,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:41:45,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2063049611] [2022-11-20 10:41:45,297 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:41:45,297 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:41:45,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:41:45,298 INFO L229 MonitoredProcess]: Starting monitored process 227 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:41:45,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (227)] Waiting until timeout for monitored process [2022-11-20 10:41:45,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:41:45,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:41:45,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 10:41:45,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:41:46,071 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:41:46,071 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 [2022-11-20 10:41:46,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:41:46,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:41:48,058 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:41:48,058 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:41:48,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2063049611] [2022-11-20 10:41:48,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2063049611] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:41:48,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:41:48,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:41:48,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588864275] [2022-11-20 10:41:48,059 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:41:48,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 10:41:48,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:41:48,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 10:41:48,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:41:48,060 INFO L87 Difference]: Start difference. First operand 6393 states and 30990 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:49,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:41:49,841 INFO L93 Difference]: Finished difference Result 6591 states and 31979 transitions. [2022-11-20 10:41:49,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 10:41:49,843 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 14 [2022-11-20 10:41:49,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:41:49,877 INFO L225 Difference]: With dead ends: 6591 [2022-11-20 10:41:49,878 INFO L226 Difference]: Without dead ends: 6591 [2022-11-20 10:41:49,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-11-20 10:41:49,878 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:41:49,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 26 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 18 Unchecked, 1.1s Time] [2022-11-20 10:41:49,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6591 states. [2022-11-20 10:41:50,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6591 to 6455. [2022-11-20 10:41:50,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6455 states, 6450 states have (on average 4.853798449612403) internal successors, (31307), 6454 states have internal predecessors, (31307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:50,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6455 states to 6455 states and 31307 transitions. [2022-11-20 10:41:50,112 INFO L78 Accepts]: Start accepts. Automaton has 6455 states and 31307 transitions. Word has length 14 [2022-11-20 10:41:50,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:41:50,112 INFO L495 AbstractCegarLoop]: Abstraction has 6455 states and 31307 transitions. [2022-11-20 10:41:50,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:41:50,112 INFO L276 IsEmpty]: Start isEmpty. Operand 6455 states and 31307 transitions. [2022-11-20 10:41:50,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:41:50,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:41:50,116 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:41:50,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (227)] Ended with exit code 0 [2022-11-20 10:41:50,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:41:50,317 INFO L420 AbstractCegarLoop]: === Iteration 227 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:41:50,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:41:50,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1406929775, now seen corresponding path program 12 times [2022-11-20 10:41:50,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:41:50,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1117487438] [2022-11-20 10:41:50,318 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:41:50,318 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:41:50,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:41:50,319 INFO L229 MonitoredProcess]: Starting monitored process 228 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:41:50,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (228)] Waiting until timeout for monitored process [2022-11-20 10:41:50,897 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 10:41:50,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:41:50,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 10:41:50,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:41:51,084 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:41:51,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:41:51,795 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:41:51,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:41:53,757 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:41:53,757 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:41:53,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1117487438] [2022-11-20 10:41:53,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1117487438] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:41:53,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:41:53,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 10:41:53,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761534121] [2022-11-20 10:41:53,758 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:41:53,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 10:41:53,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:41:53,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 10:41:53,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2022-11-20 10:41:53,759 INFO L87 Difference]: Start difference. First operand 6455 states and 31307 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) [2022-11-20 10:42:05,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:42:05,475 INFO L93 Difference]: Finished difference Result 11035 states and 52340 transitions. [2022-11-20 10:42:05,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 10:42:05,477 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 14 [2022-11-20 10:42:05,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:42:05,520 INFO L225 Difference]: With dead ends: 11035 [2022-11-20 10:42:05,520 INFO L226 Difference]: Without dead ends: 11035 [2022-11-20 10:42:05,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2022-11-20 10:42:05,521 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 101 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 366 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:42:05,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 31 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 614 Invalid, 0 Unknown, 366 Unchecked, 6.8s Time] [2022-11-20 10:42:05,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11035 states. [2022-11-20 10:42:05,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11035 to 7182. [2022-11-20 10:42:05,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7182 states, 7177 states have (on average 4.928382332450885) internal successors, (35371), 7181 states have internal predecessors, (35371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:05,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7182 states to 7182 states and 35371 transitions. [2022-11-20 10:42:05,863 INFO L78 Accepts]: Start accepts. Automaton has 7182 states and 35371 transitions. Word has length 14 [2022-11-20 10:42:05,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:42:05,863 INFO L495 AbstractCegarLoop]: Abstraction has 7182 states and 35371 transitions. [2022-11-20 10:42:05,863 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) [2022-11-20 10:42:05,863 INFO L276 IsEmpty]: Start isEmpty. Operand 7182 states and 35371 transitions. [2022-11-20 10:42:05,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:42:05,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:42:05,871 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:42:05,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (228)] Forceful destruction successful, exit code 0 [2022-11-20 10:42:06,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:42:06,090 INFO L420 AbstractCegarLoop]: === Iteration 228 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:42:06,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:42:06,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1153043727, now seen corresponding path program 13 times [2022-11-20 10:42:06,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:42:06,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [578602209] [2022-11-20 10:42:06,092 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:42:06,092 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:42:06,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:42:06,094 INFO L229 MonitoredProcess]: Starting monitored process 229 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:42:06,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (229)] Waiting until timeout for monitored process [2022-11-20 10:42:06,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:42:06,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 10:42:06,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:42:06,855 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:42:06,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:42:07,578 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:42:07,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:42:09,572 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:42:09,572 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:42:09,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [578602209] [2022-11-20 10:42:09,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [578602209] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:42:09,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:42:09,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 10:42:09,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103743298] [2022-11-20 10:42:09,573 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:42:09,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 10:42:09,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:42:09,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 10:42:09,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2022-11-20 10:42:09,574 INFO L87 Difference]: Start difference. First operand 7182 states and 35371 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) [2022-11-20 10:42:25,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:42:25,234 INFO L93 Difference]: Finished difference Result 12234 states and 58634 transitions. [2022-11-20 10:42:25,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-20 10:42:25,236 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 14 [2022-11-20 10:42:25,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:42:25,287 INFO L225 Difference]: With dead ends: 12234 [2022-11-20 10:42:25,287 INFO L226 Difference]: Without dead ends: 12234 [2022-11-20 10:42:25,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=306, Invalid=1026, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 10:42:25,288 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 191 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1219 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:42:25,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 35 Invalid, 1892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 669 Invalid, 0 Unknown, 1219 Unchecked, 7.4s Time] [2022-11-20 10:42:25,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12234 states. [2022-11-20 10:42:25,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12234 to 7269. [2022-11-20 10:42:25,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7269 states, 7264 states have (on average 4.924697136563877) internal successors, (35773), 7268 states have internal predecessors, (35773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:25,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7269 states to 7269 states and 35773 transitions. [2022-11-20 10:42:25,613 INFO L78 Accepts]: Start accepts. Automaton has 7269 states and 35773 transitions. Word has length 14 [2022-11-20 10:42:25,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:42:25,613 INFO L495 AbstractCegarLoop]: Abstraction has 7269 states and 35773 transitions. [2022-11-20 10:42:25,613 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) [2022-11-20 10:42:25,613 INFO L276 IsEmpty]: Start isEmpty. Operand 7269 states and 35773 transitions. [2022-11-20 10:42:25,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:42:25,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:42:25,618 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:42:25,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (229)] Ended with exit code 0 [2022-11-20 10:42:25,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:42:25,819 INFO L420 AbstractCegarLoop]: === Iteration 229 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:42:25,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:42:25,819 INFO L85 PathProgramCache]: Analyzing trace with hash -445209281, now seen corresponding path program 14 times [2022-11-20 10:42:25,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:42:25,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2030872296] [2022-11-20 10:42:25,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:42:25,820 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:42:25,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:42:25,821 INFO L229 MonitoredProcess]: Starting monitored process 230 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:42:25,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (230)] Waiting until timeout for monitored process [2022-11-20 10:42:26,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:42:26,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:42:26,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 10:42:26,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:42:26,563 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:42:26,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:42:27,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:42:27,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:42:29,151 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:42:29,151 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:42:29,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2030872296] [2022-11-20 10:42:29,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2030872296] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:42:29,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:42:29,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 10:42:29,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290083490] [2022-11-20 10:42:29,152 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:42:29,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 10:42:29,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:42:29,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 10:42:29,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2022-11-20 10:42:29,153 INFO L87 Difference]: Start difference. First operand 7269 states and 35773 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) [2022-11-20 10:42:36,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:42:36,937 INFO L93 Difference]: Finished difference Result 9963 states and 48894 transitions. [2022-11-20 10:42:36,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 10:42:36,939 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 14 [2022-11-20 10:42:36,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:42:36,981 INFO L225 Difference]: With dead ends: 9963 [2022-11-20 10:42:36,981 INFO L226 Difference]: Without dead ends: 9963 [2022-11-20 10:42:36,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2022-11-20 10:42:36,982 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 107 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 707 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:42:36,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 37 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 475 Invalid, 0 Unknown, 707 Unchecked, 4.7s Time] [2022-11-20 10:42:36,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9963 states. [2022-11-20 10:42:37,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9963 to 7239. [2022-11-20 10:42:37,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7239 states, 7234 states have (on average 4.92632015482444) internal successors, (35637), 7238 states have internal predecessors, (35637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:37,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7239 states to 7239 states and 35637 transitions. [2022-11-20 10:42:37,283 INFO L78 Accepts]: Start accepts. Automaton has 7239 states and 35637 transitions. Word has length 14 [2022-11-20 10:42:37,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:42:37,284 INFO L495 AbstractCegarLoop]: Abstraction has 7239 states and 35637 transitions. [2022-11-20 10:42:37,284 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) [2022-11-20 10:42:37,284 INFO L276 IsEmpty]: Start isEmpty. Operand 7239 states and 35637 transitions. [2022-11-20 10:42:37,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:42:37,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:42:37,288 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:42:37,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (230)] Ended with exit code 0 [2022-11-20 10:42:37,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:42:37,489 INFO L420 AbstractCegarLoop]: === Iteration 230 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:42:37,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:42:37,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1842064659, now seen corresponding path program 5 times [2022-11-20 10:42:37,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:42:37,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1615730465] [2022-11-20 10:42:37,490 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:42:37,490 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:42:37,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:42:37,491 INFO L229 MonitoredProcess]: Starting monitored process 231 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:42:37,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (231)] Waiting until timeout for monitored process [2022-11-20 10:42:38,047 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-20 10:42:38,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:42:38,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 10:42:38,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:42:38,236 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:42:38,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:42:38,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:42:38,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:42:40,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:42:40,711 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:42:40,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1615730465] [2022-11-20 10:42:40,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1615730465] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:42:40,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:42:40,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 10:42:40,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804465186] [2022-11-20 10:42:40,711 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:42:40,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 10:42:40,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:42:40,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 10:42:40,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:42:40,712 INFO L87 Difference]: Start difference. First operand 7239 states and 35637 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:57,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:42:57,572 INFO L93 Difference]: Finished difference Result 14274 states and 70412 transitions. [2022-11-20 10:42:57,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 10:42:57,574 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 10:42:57,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:42:57,636 INFO L225 Difference]: With dead ends: 14274 [2022-11-20 10:42:57,636 INFO L226 Difference]: Without dead ends: 14274 [2022-11-20 10:42:57,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=230, Invalid=892, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 10:42:57,636 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 421 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:42:57,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 223 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1066 Invalid, 0 Unknown, 147 Unchecked, 8.1s Time] [2022-11-20 10:42:57,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14274 states. [2022-11-20 10:42:57,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14274 to 10704. [2022-11-20 10:42:58,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10704 states, 10699 states have (on average 5.07075427610057) internal successors, (54252), 10703 states have internal predecessors, (54252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:58,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10704 states to 10704 states and 54252 transitions. [2022-11-20 10:42:58,049 INFO L78 Accepts]: Start accepts. Automaton has 10704 states and 54252 transitions. Word has length 14 [2022-11-20 10:42:58,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:42:58,050 INFO L495 AbstractCegarLoop]: Abstraction has 10704 states and 54252 transitions. [2022-11-20 10:42:58,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:42:58,050 INFO L276 IsEmpty]: Start isEmpty. Operand 10704 states and 54252 transitions. [2022-11-20 10:42:58,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:42:58,054 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:42:58,054 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:42:58,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (231)] Ended with exit code 0 [2022-11-20 10:42:58,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:42:58,255 INFO L420 AbstractCegarLoop]: === Iteration 231 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:42:58,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:42:58,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1836776707, now seen corresponding path program 6 times [2022-11-20 10:42:58,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:42:58,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [774500382] [2022-11-20 10:42:58,256 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:42:58,256 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:42:58,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:42:58,257 INFO L229 MonitoredProcess]: Starting monitored process 232 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:42:58,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (232)] Waiting until timeout for monitored process [2022-11-20 10:42:58,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-20 10:42:58,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:42:58,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 10:42:58,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:42:59,004 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:42:59,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:42:59,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:42:59,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:43:01,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:43:01,711 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:43:01,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [774500382] [2022-11-20 10:43:01,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [774500382] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:43:01,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:43:01,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 10:43:01,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842853031] [2022-11-20 10:43:01,712 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:43:01,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 10:43:01,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:43:01,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 10:43:01,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:43:01,713 INFO L87 Difference]: Start difference. First operand 10704 states and 54252 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:11,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:43:11,537 INFO L93 Difference]: Finished difference Result 11097 states and 55306 transitions. [2022-11-20 10:43:11,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 10:43:11,540 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 10:43:11,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:43:11,591 INFO L225 Difference]: With dead ends: 11097 [2022-11-20 10:43:11,592 INFO L226 Difference]: Without dead ends: 11097 [2022-11-20 10:43:11,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2022-11-20 10:43:11,592 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 265 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:43:11,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 169 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 784 Invalid, 0 Unknown, 184 Unchecked, 5.9s Time] [2022-11-20 10:43:11,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11097 states. [2022-11-20 10:43:11,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11097 to 10708. [2022-11-20 10:43:11,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10708 states, 10703 states have (on average 5.070540969821545) internal successors, (54270), 10707 states have internal predecessors, (54270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:12,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10708 states to 10708 states and 54270 transitions. [2022-11-20 10:43:12,035 INFO L78 Accepts]: Start accepts. Automaton has 10708 states and 54270 transitions. Word has length 14 [2022-11-20 10:43:12,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:43:12,035 INFO L495 AbstractCegarLoop]: Abstraction has 10708 states and 54270 transitions. [2022-11-20 10:43:12,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:12,035 INFO L276 IsEmpty]: Start isEmpty. Operand 10708 states and 54270 transitions. [2022-11-20 10:43:12,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:43:12,040 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:43:12,040 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:43:12,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (232)] Forceful destruction successful, exit code 0 [2022-11-20 10:43:12,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:43:12,241 INFO L420 AbstractCegarLoop]: === Iteration 232 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:43:12,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:43:12,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1832654017, now seen corresponding path program 7 times [2022-11-20 10:43:12,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:43:12,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1300840850] [2022-11-20 10:43:12,242 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:43:12,242 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:43:12,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:43:12,243 INFO L229 MonitoredProcess]: Starting monitored process 233 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:43:12,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (233)] Waiting until timeout for monitored process [2022-11-20 10:43:12,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:43:12,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 10:43:12,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:43:12,925 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:43:12,926 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 [2022-11-20 10:43:13,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:43:13,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:43:15,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:43:15,533 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:43:15,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1300840850] [2022-11-20 10:43:15,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1300840850] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:43:15,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:43:15,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 10:43:15,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719272386] [2022-11-20 10:43:15,534 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:43:15,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 10:43:15,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:43:15,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 10:43:15,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:43:15,535 INFO L87 Difference]: Start difference. First operand 10708 states and 54270 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:25,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:43:25,191 INFO L93 Difference]: Finished difference Result 11119 states and 55388 transitions. [2022-11-20 10:43:25,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 10:43:25,194 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 10:43:25,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:43:25,241 INFO L225 Difference]: With dead ends: 11119 [2022-11-20 10:43:25,241 INFO L226 Difference]: Without dead ends: 11119 [2022-11-20 10:43:25,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2022-11-20 10:43:25,241 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 373 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:43:25,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 178 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 775 Invalid, 0 Unknown, 174 Unchecked, 5.7s Time] [2022-11-20 10:43:25,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11119 states. [2022-11-20 10:43:25,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11119 to 10718. [2022-11-20 10:43:25,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10718 states, 10713 states have (on average 5.069541678334733) internal successors, (54310), 10717 states have internal predecessors, (54310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:25,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10718 states to 10718 states and 54310 transitions. [2022-11-20 10:43:25,701 INFO L78 Accepts]: Start accepts. Automaton has 10718 states and 54310 transitions. Word has length 14 [2022-11-20 10:43:25,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:43:25,701 INFO L495 AbstractCegarLoop]: Abstraction has 10718 states and 54310 transitions. [2022-11-20 10:43:25,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:25,701 INFO L276 IsEmpty]: Start isEmpty. Operand 10718 states and 54310 transitions. [2022-11-20 10:43:25,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:43:25,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:43:25,706 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:43:25,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (233)] Forceful destruction successful, exit code 0 [2022-11-20 10:43:25,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:43:25,907 INFO L420 AbstractCegarLoop]: === Iteration 233 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:43:25,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:43:25,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1704850627, now seen corresponding path program 8 times [2022-11-20 10:43:25,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:43:25,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [315027715] [2022-11-20 10:43:25,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:43:25,908 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 [2022-11-20 10:43:25,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:43:25,909 INFO L229 MonitoredProcess]: Starting monitored process 234 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:43:25,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (234)] Waiting until timeout for monitored process [2022-11-20 10:43:26,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:43:26,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:43:26,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 10:43:26,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:43:26,632 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:43:26,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:43:27,118 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:43:27,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:43:29,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:43:29,260 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:43:29,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [315027715] [2022-11-20 10:43:29,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [315027715] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:43:29,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:43:29,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 10:43:29,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622161323] [2022-11-20 10:43:29,261 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:43:29,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 10:43:29,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:43:29,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 10:43:29,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:43:29,262 INFO L87 Difference]: Start difference. First operand 10718 states and 54310 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:33,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:43:33,982 INFO L93 Difference]: Finished difference Result 11019 states and 55278 transitions. [2022-11-20 10:43:33,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 10:43:33,984 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 10:43:33,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:43:34,187 INFO L225 Difference]: With dead ends: 11019 [2022-11-20 10:43:34,187 INFO L226 Difference]: Without dead ends: 11019 [2022-11-20 10:43:34,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2022-11-20 10:43:34,188 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 173 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:43:34,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 199 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 351 Invalid, 0 Unknown, 202 Unchecked, 2.4s Time] [2022-11-20 10:43:34,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11019 states. [2022-11-20 10:43:34,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11019 to 10738. [2022-11-20 10:43:34,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10738 states, 10733 states have (on average 5.067921364017516) internal successors, (54394), 10737 states have internal predecessors, (54394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:34,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10738 states to 10738 states and 54394 transitions. [2022-11-20 10:43:34,504 INFO L78 Accepts]: Start accepts. Automaton has 10738 states and 54394 transitions. Word has length 14 [2022-11-20 10:43:34,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:43:34,505 INFO L495 AbstractCegarLoop]: Abstraction has 10738 states and 54394 transitions. [2022-11-20 10:43:34,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:34,505 INFO L276 IsEmpty]: Start isEmpty. Operand 10738 states and 54394 transitions. [2022-11-20 10:43:34,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:43:34,510 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:43:34,510 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:43:34,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (234)] Ended with exit code 0 [2022-11-20 10:43:34,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:43:34,710 INFO L420 AbstractCegarLoop]: === Iteration 234 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:43:34,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:43:34,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1725663237, now seen corresponding path program 9 times [2022-11-20 10:43:34,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:43:34,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1266152703] [2022-11-20 10:43:34,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:43:34,712 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:43:34,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:43:34,713 INFO L229 MonitoredProcess]: Starting monitored process 235 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:43:34,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (235)] Waiting until timeout for monitored process [2022-11-20 10:43:35,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 10:43:35,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:43:35,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:43:35,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:43:35,464 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:43:35,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:43:36,016 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:43:36,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:43:36,608 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:43:36,608 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:43:36,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1266152703] [2022-11-20 10:43:36,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1266152703] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:43:36,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:43:36,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-20 10:43:36,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200915806] [2022-11-20 10:43:36,609 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:43:36,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 10:43:36,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:43:36,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 10:43:36,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:43:36,610 INFO L87 Difference]: Start difference. First operand 10738 states and 54394 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:42,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:43:42,735 INFO L93 Difference]: Finished difference Result 11670 states and 57088 transitions. [2022-11-20 10:43:42,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 10:43:42,737 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 10:43:42,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:43:42,788 INFO L225 Difference]: With dead ends: 11670 [2022-11-20 10:43:42,788 INFO L226 Difference]: Without dead ends: 11670 [2022-11-20 10:43:42,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2022-11-20 10:43:42,788 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 246 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 284 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:43:42,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 184 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 725 Invalid, 0 Unknown, 284 Unchecked, 4.7s Time] [2022-11-20 10:43:42,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11670 states. [2022-11-20 10:43:43,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11670 to 10814. [2022-11-20 10:43:43,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10814 states, 10809 states have (on average 5.062262929040615) internal successors, (54718), 10813 states have internal predecessors, (54718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:43,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10814 states to 10814 states and 54718 transitions. [2022-11-20 10:43:43,296 INFO L78 Accepts]: Start accepts. Automaton has 10814 states and 54718 transitions. Word has length 14 [2022-11-20 10:43:43,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:43:43,296 INFO L495 AbstractCegarLoop]: Abstraction has 10814 states and 54718 transitions. [2022-11-20 10:43:43,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:43,297 INFO L276 IsEmpty]: Start isEmpty. Operand 10814 states and 54718 transitions. [2022-11-20 10:43:43,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:43:43,305 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:43:43,305 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:43:43,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (235)] Ended with exit code 0 [2022-11-20 10:43:43,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:43:43,506 INFO L420 AbstractCegarLoop]: === Iteration 235 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:43:43,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:43:43,506 INFO L85 PathProgramCache]: Analyzing trace with hash -705108650, now seen corresponding path program 11 times [2022-11-20 10:43:43,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:43:43,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [858801926] [2022-11-20 10:43:43,507 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:43:43,507 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 [2022-11-20 10:43:43,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:43:43,508 INFO L229 MonitoredProcess]: Starting monitored process 236 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:43:43,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (236)] Waiting until timeout for monitored process [2022-11-20 10:43:44,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-20 10:43:44,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:43:44,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 10:43:44,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:43:44,227 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:43:44,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:43:44,684 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:43:44,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:43:45,621 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:43:45,622 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:43:45,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [858801926] [2022-11-20 10:43:45,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [858801926] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:43:45,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:43:45,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 10:43:45,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581677744] [2022-11-20 10:43:45,622 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:43:45,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:43:45,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:43:45,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:43:45,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:43:45,623 INFO L87 Difference]: Start difference. First operand 10814 states and 54718 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:47,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:43:47,055 INFO L93 Difference]: Finished difference Result 10850 states and 54864 transitions. [2022-11-20 10:43:47,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 10:43:47,057 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 14 [2022-11-20 10:43:47,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:43:47,237 INFO L225 Difference]: With dead ends: 10850 [2022-11-20 10:43:47,238 INFO L226 Difference]: Without dead ends: 10850 [2022-11-20 10:43:47,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:43:47,238 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 22 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:43:47,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 37 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 25 Unchecked, 0.7s Time] [2022-11-20 10:43:47,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10850 states. [2022-11-20 10:43:47,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10850 to 10838. [2022-11-20 10:43:47,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10838 states, 10833 states have (on average 5.059909535678021) internal successors, (54814), 10837 states have internal predecessors, (54814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:47,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10838 states to 10838 states and 54814 transitions. [2022-11-20 10:43:47,716 INFO L78 Accepts]: Start accepts. Automaton has 10838 states and 54814 transitions. Word has length 14 [2022-11-20 10:43:47,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:43:47,716 INFO L495 AbstractCegarLoop]: Abstraction has 10838 states and 54814 transitions. [2022-11-20 10:43:47,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:47,717 INFO L276 IsEmpty]: Start isEmpty. Operand 10838 states and 54814 transitions. [2022-11-20 10:43:47,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:43:47,722 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:43:47,722 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:43:47,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (236)] Forceful destruction successful, exit code 0 [2022-11-20 10:43:47,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:43:47,923 INFO L420 AbstractCegarLoop]: === Iteration 236 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:43:47,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:43:47,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1263244054, now seen corresponding path program 12 times [2022-11-20 10:43:47,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:43:47,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1807037396] [2022-11-20 10:43:47,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:43:47,924 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 [2022-11-20 10:43:47,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:43:47,928 INFO L229 MonitoredProcess]: Starting monitored process 237 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:43:47,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (237)] Waiting until timeout for monitored process [2022-11-20 10:43:48,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-20 10:43:48,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:43:48,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 10:43:48,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:43:48,702 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:43:48,703 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 [2022-11-20 10:43:49,205 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:43:49,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:43:50,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:43:50,317 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:43:50,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1807037396] [2022-11-20 10:43:50,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1807037396] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:43:50,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:43:50,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 10:43:50,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700958002] [2022-11-20 10:43:50,318 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:43:50,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:43:50,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:43:50,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:43:50,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:43:50,319 INFO L87 Difference]: Start difference. First operand 10838 states and 54814 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:52,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:43:52,246 INFO L93 Difference]: Finished difference Result 10964 states and 55350 transitions. [2022-11-20 10:43:52,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 10:43:52,248 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 14 [2022-11-20 10:43:52,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:43:52,298 INFO L225 Difference]: With dead ends: 10964 [2022-11-20 10:43:52,298 INFO L226 Difference]: Without dead ends: 10964 [2022-11-20 10:43:52,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:43:52,298 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 28 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:43:52,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 48 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 160 Invalid, 0 Unknown, 32 Unchecked, 1.2s Time] [2022-11-20 10:43:52,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10964 states. [2022-11-20 10:43:52,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10964 to 10860. [2022-11-20 10:43:52,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10860 states, 10855 states have (on average 5.0581298940580375) internal successors, (54906), 10859 states have internal predecessors, (54906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:52,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10860 states to 10860 states and 54906 transitions. [2022-11-20 10:43:52,802 INFO L78 Accepts]: Start accepts. Automaton has 10860 states and 54906 transitions. Word has length 14 [2022-11-20 10:43:52,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:43:52,802 INFO L495 AbstractCegarLoop]: Abstraction has 10860 states and 54906 transitions. [2022-11-20 10:43:52,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:52,802 INFO L276 IsEmpty]: Start isEmpty. Operand 10860 states and 54906 transitions. [2022-11-20 10:43:52,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:43:52,810 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:43:52,810 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:43:52,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (237)] Ended with exit code 0 [2022-11-20 10:43:53,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:43:53,011 INFO L420 AbstractCegarLoop]: === Iteration 237 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:43:53,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:43:53,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1263239404, now seen corresponding path program 13 times [2022-11-20 10:43:53,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:43:53,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [940558206] [2022-11-20 10:43:53,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:43:53,012 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:43:53,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:43:53,013 INFO L229 MonitoredProcess]: Starting monitored process 238 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:43:53,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (238)] Waiting until timeout for monitored process [2022-11-20 10:43:53,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:43:53,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 10:43:53,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:43:53,745 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:43:53,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:43:54,294 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:43:54,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:43:55,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:43:55,447 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:43:55,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [940558206] [2022-11-20 10:43:55,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [940558206] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:43:55,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:43:55,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 10:43:55,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285066943] [2022-11-20 10:43:55,447 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:43:55,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:43:55,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:43:55,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:43:55,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:43:55,448 INFO L87 Difference]: Start difference. First operand 10860 states and 54906 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:56,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:43:56,510 INFO L93 Difference]: Finished difference Result 11002 states and 55526 transitions. [2022-11-20 10:43:56,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 10:43:56,512 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 14 [2022-11-20 10:43:56,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:43:56,571 INFO L225 Difference]: With dead ends: 11002 [2022-11-20 10:43:56,571 INFO L226 Difference]: Without dead ends: 11002 [2022-11-20 10:43:56,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:43:56,572 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 20 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:43:56,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 51 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 75 Unchecked, 0.3s Time] [2022-11-20 10:43:56,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11002 states. [2022-11-20 10:43:57,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11002 to 10964. [2022-11-20 10:43:57,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10964 states, 10959 states have (on average 5.052285792499315) internal successors, (55368), 10963 states have internal predecessors, (55368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:57,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10964 states to 10964 states and 55368 transitions. [2022-11-20 10:43:57,074 INFO L78 Accepts]: Start accepts. Automaton has 10964 states and 55368 transitions. Word has length 14 [2022-11-20 10:43:57,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:43:57,074 INFO L495 AbstractCegarLoop]: Abstraction has 10964 states and 55368 transitions. [2022-11-20 10:43:57,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:43:57,074 INFO L276 IsEmpty]: Start isEmpty. Operand 10964 states and 55368 transitions. [2022-11-20 10:43:57,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:43:57,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:43:57,081 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:43:57,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (238)] Forceful destruction successful, exit code 0 [2022-11-20 10:43:57,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 238 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:43:57,281 INFO L420 AbstractCegarLoop]: === Iteration 238 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:43:57,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:43:57,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1263095254, now seen corresponding path program 14 times [2022-11-20 10:43:57,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:43:57,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [311981056] [2022-11-20 10:43:57,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:43:57,282 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:43:57,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:43:57,283 INFO L229 MonitoredProcess]: Starting monitored process 239 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:43:57,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (239)] Waiting until timeout for monitored process [2022-11-20 10:43:57,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:43:57,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:43:57,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 10:43:57,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:43:58,045 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:43:58,045 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 [2022-11-20 10:43:58,565 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:43:58,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:43:59,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:43:59,693 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:43:59,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [311981056] [2022-11-20 10:43:59,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [311981056] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:43:59,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:43:59,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 10:43:59,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231184482] [2022-11-20 10:43:59,694 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:43:59,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:43:59,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:43:59,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:43:59,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:43:59,694 INFO L87 Difference]: Start difference. First operand 10964 states and 55368 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:02,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:44:02,666 INFO L93 Difference]: Finished difference Result 11431 states and 57375 transitions. [2022-11-20 10:44:02,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 10:44:02,668 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 14 [2022-11-20 10:44:02,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:44:02,862 INFO L225 Difference]: With dead ends: 11431 [2022-11-20 10:44:02,862 INFO L226 Difference]: Without dead ends: 11431 [2022-11-20 10:44:02,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:44:02,862 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 83 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:44:02,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 55 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 247 Invalid, 0 Unknown, 102 Unchecked, 2.1s Time] [2022-11-20 10:44:02,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11431 states. [2022-11-20 10:44:03,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11431 to 11204. [2022-11-20 10:44:03,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11204 states, 11199 states have (on average 5.043664612911867) internal successors, (56484), 11203 states have internal predecessors, (56484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:03,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11204 states to 11204 states and 56484 transitions. [2022-11-20 10:44:03,173 INFO L78 Accepts]: Start accepts. Automaton has 11204 states and 56484 transitions. Word has length 14 [2022-11-20 10:44:03,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:44:03,174 INFO L495 AbstractCegarLoop]: Abstraction has 11204 states and 56484 transitions. [2022-11-20 10:44:03,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:03,174 INFO L276 IsEmpty]: Start isEmpty. Operand 11204 states and 56484 transitions. [2022-11-20 10:44:03,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:44:03,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:44:03,180 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:44:03,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (239)] Ended with exit code 0 [2022-11-20 10:44:03,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:44:03,381 INFO L420 AbstractCegarLoop]: === Iteration 239 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:44:03,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:44:03,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1258626604, now seen corresponding path program 15 times [2022-11-20 10:44:03,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:44:03,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [69644374] [2022-11-20 10:44:03,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:44:03,382 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:44:03,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:44:03,383 INFO L229 MonitoredProcess]: Starting monitored process 240 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:44:03,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (240)] Waiting until timeout for monitored process [2022-11-20 10:44:04,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 10:44:04,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:44:04,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 10:44:04,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:44:04,188 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:44:04,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:44:04,715 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:44:04,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:44:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:44:05,665 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:44:05,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [69644374] [2022-11-20 10:44:05,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [69644374] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:44:05,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:44:05,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 10:44:05,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510253312] [2022-11-20 10:44:05,665 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:44:05,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:44:05,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:44:05,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:44:05,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:44:05,666 INFO L87 Difference]: Start difference. First operand 11204 states and 56484 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:07,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:44:07,225 INFO L93 Difference]: Finished difference Result 11230 states and 56586 transitions. [2022-11-20 10:44:07,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 10:44:07,227 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 14 [2022-11-20 10:44:07,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:44:07,276 INFO L225 Difference]: With dead ends: 11230 [2022-11-20 10:44:07,276 INFO L226 Difference]: Without dead ends: 11230 [2022-11-20 10:44:07,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:44:07,277 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:44:07,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 53 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 125 Invalid, 0 Unknown, 13 Unchecked, 0.8s Time] [2022-11-20 10:44:07,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11230 states. [2022-11-20 10:44:07,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11230 to 11196. [2022-11-20 10:44:07,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11196 states, 11191 states have (on average 5.044410687159324) internal successors, (56452), 11195 states have internal predecessors, (56452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:07,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11196 states to 11196 states and 56452 transitions. [2022-11-20 10:44:07,787 INFO L78 Accepts]: Start accepts. Automaton has 11196 states and 56452 transitions. Word has length 14 [2022-11-20 10:44:07,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:44:07,787 INFO L495 AbstractCegarLoop]: Abstraction has 11196 states and 56452 transitions. [2022-11-20 10:44:07,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:07,787 INFO L276 IsEmpty]: Start isEmpty. Operand 11196 states and 56452 transitions. [2022-11-20 10:44:07,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:44:07,795 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:44:07,796 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:44:07,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (240)] Forceful destruction successful, exit code 0 [2022-11-20 10:44:07,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:44:07,999 INFO L420 AbstractCegarLoop]: === Iteration 240 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:44:08,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:44:08,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1796700906, now seen corresponding path program 1 times [2022-11-20 10:44:08,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:44:08,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [159349027] [2022-11-20 10:44:08,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:44:08,001 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:44:08,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:44:08,002 INFO L229 MonitoredProcess]: Starting monitored process 241 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:44:08,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (241)] Waiting until timeout for monitored process [2022-11-20 10:44:08,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:44:08,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 10:44:08,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:44:08,702 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:44:08,703 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 [2022-11-20 10:44:09,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:09,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:44:09,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:09,986 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:44:09,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [159349027] [2022-11-20 10:44:09,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [159349027] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:44:09,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:44:09,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:44:09,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552331307] [2022-11-20 10:44:09,987 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:44:09,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 10:44:09,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:44:09,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 10:44:09,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:44:09,988 INFO L87 Difference]: Start difference. First operand 11196 states and 56452 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:11,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:44:11,968 INFO L93 Difference]: Finished difference Result 11453 states and 57547 transitions. [2022-11-20 10:44:11,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 10:44:11,969 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 10:44:11,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:44:12,017 INFO L225 Difference]: With dead ends: 11453 [2022-11-20 10:44:12,017 INFO L226 Difference]: Without dead ends: 11453 [2022-11-20 10:44:12,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:44:12,018 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 29 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:44:12,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 55 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 124 Invalid, 0 Unknown, 46 Unchecked, 1.2s Time] [2022-11-20 10:44:12,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11453 states. [2022-11-20 10:44:12,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11453 to 11269. [2022-11-20 10:44:12,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11269 states, 11264 states have (on average 5.041104403409091) internal successors, (56783), 11268 states have internal predecessors, (56783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:12,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11269 states to 11269 states and 56783 transitions. [2022-11-20 10:44:12,410 INFO L78 Accepts]: Start accepts. Automaton has 11269 states and 56783 transitions. Word has length 15 [2022-11-20 10:44:12,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:44:12,411 INFO L495 AbstractCegarLoop]: Abstraction has 11269 states and 56783 transitions. [2022-11-20 10:44:12,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:12,411 INFO L276 IsEmpty]: Start isEmpty. Operand 11269 states and 56783 transitions. [2022-11-20 10:44:12,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:44:12,420 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:44:12,420 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:44:12,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (241)] Ended with exit code 0 [2022-11-20 10:44:12,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:44:12,621 INFO L420 AbstractCegarLoop]: === Iteration 241 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:44:12,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:44:12,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1823512806, now seen corresponding path program 2 times [2022-11-20 10:44:12,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:44:12,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1141512311] [2022-11-20 10:44:12,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:44:12,622 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:44:12,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:44:12,623 INFO L229 MonitoredProcess]: Starting monitored process 242 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:44:12,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (242)] Waiting until timeout for monitored process [2022-11-20 10:44:13,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:44:13,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:44:13,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 10:44:13,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:44:13,446 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:44:13,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:44:13,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:13,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:44:14,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:14,592 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:44:14,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1141512311] [2022-11-20 10:44:14,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1141512311] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:44:14,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:44:14,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:44:14,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121426118] [2022-11-20 10:44:14,593 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:44:14,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 10:44:14,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:44:14,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 10:44:14,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:44:14,594 INFO L87 Difference]: Start difference. First operand 11269 states and 56783 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:16,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:44:16,608 INFO L93 Difference]: Finished difference Result 11441 states and 57482 transitions. [2022-11-20 10:44:16,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 10:44:16,610 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 10:44:16,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:44:16,665 INFO L225 Difference]: With dead ends: 11441 [2022-11-20 10:44:16,665 INFO L226 Difference]: Without dead ends: 11441 [2022-11-20 10:44:16,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:44:16,666 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 36 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:44:16,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 54 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 148 Invalid, 0 Unknown, 27 Unchecked, 1.2s Time] [2022-11-20 10:44:16,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11441 states. [2022-11-20 10:44:16,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11441 to 11282. [2022-11-20 10:44:16,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11282 states, 11277 states have (on average 5.039638201649375) internal successors, (56832), 11281 states have internal predecessors, (56832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:17,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11282 states to 11282 states and 56832 transitions. [2022-11-20 10:44:17,006 INFO L78 Accepts]: Start accepts. Automaton has 11282 states and 56832 transitions. Word has length 15 [2022-11-20 10:44:17,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:44:17,006 INFO L495 AbstractCegarLoop]: Abstraction has 11282 states and 56832 transitions. [2022-11-20 10:44:17,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:17,007 INFO L276 IsEmpty]: Start isEmpty. Operand 11282 states and 56832 transitions. [2022-11-20 10:44:17,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:44:17,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:44:17,011 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:44:17,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (242)] Ended with exit code 0 [2022-11-20 10:44:17,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:44:17,212 INFO L420 AbstractCegarLoop]: === Iteration 242 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:44:17,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:44:17,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1628978750, now seen corresponding path program 3 times [2022-11-20 10:44:17,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:44:17,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1550825923] [2022-11-20 10:44:17,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:44:17,213 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:44:17,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:44:17,214 INFO L229 MonitoredProcess]: Starting monitored process 243 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:44:17,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (243)] Waiting until timeout for monitored process [2022-11-20 10:44:17,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:44:17,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:44:17,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 10:44:17,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:44:17,842 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:44:17,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:44:18,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:18,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:44:18,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:18,843 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:44:18,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1550825923] [2022-11-20 10:44:18,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1550825923] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:44:18,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:44:18,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:44:18,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307736716] [2022-11-20 10:44:18,844 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:44:18,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 10:44:18,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:44:18,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 10:44:18,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:44:18,845 INFO L87 Difference]: Start difference. First operand 11282 states and 56832 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:19,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:44:19,798 INFO L93 Difference]: Finished difference Result 11312 states and 56928 transitions. [2022-11-20 10:44:19,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:44:19,799 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 10:44:19,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:44:19,845 INFO L225 Difference]: With dead ends: 11312 [2022-11-20 10:44:19,845 INFO L226 Difference]: Without dead ends: 11312 [2022-11-20 10:44:19,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:44:19,846 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:44:19,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 45 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 45 Unchecked, 0.5s Time] [2022-11-20 10:44:19,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11312 states. [2022-11-20 10:44:20,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11312 to 11285. [2022-11-20 10:44:20,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11285 states, 11280 states have (on average 5.039095744680851) internal successors, (56841), 11284 states have internal predecessors, (56841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:20,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11285 states to 11285 states and 56841 transitions. [2022-11-20 10:44:20,238 INFO L78 Accepts]: Start accepts. Automaton has 11285 states and 56841 transitions. Word has length 15 [2022-11-20 10:44:20,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:44:20,238 INFO L495 AbstractCegarLoop]: Abstraction has 11285 states and 56841 transitions. [2022-11-20 10:44:20,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:20,239 INFO L276 IsEmpty]: Start isEmpty. Operand 11285 states and 56841 transitions. [2022-11-20 10:44:20,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:44:20,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:44:20,248 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:44:20,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (243)] Ended with exit code 0 [2022-11-20 10:44:20,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:44:20,448 INFO L420 AbstractCegarLoop]: === Iteration 243 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:44:20,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:44:20,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1750883522, now seen corresponding path program 1 times [2022-11-20 10:44:20,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:44:20,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1871771262] [2022-11-20 10:44:20,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:44:20,449 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:44:20,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:44:20,450 INFO L229 MonitoredProcess]: Starting monitored process 244 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:44:20,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (244)] Waiting until timeout for monitored process [2022-11-20 10:44:20,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:44:20,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 10:44:20,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:44:21,073 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:44:21,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:44:21,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:21,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:44:22,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:22,309 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:44:22,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1871771262] [2022-11-20 10:44:22,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1871771262] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:44:22,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:44:22,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:44:22,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935254034] [2022-11-20 10:44:22,310 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:44:22,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 10:44:22,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:44:22,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 10:44:22,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:44:22,311 INFO L87 Difference]: Start difference. First operand 11285 states and 56841 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:24,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:44:24,449 INFO L93 Difference]: Finished difference Result 11415 states and 57344 transitions. [2022-11-20 10:44:24,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 10:44:24,451 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 10:44:24,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:44:24,495 INFO L225 Difference]: With dead ends: 11415 [2022-11-20 10:44:24,495 INFO L226 Difference]: Without dead ends: 11415 [2022-11-20 10:44:24,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:44:24,495 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 34 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:44:24,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 56 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 151 Invalid, 0 Unknown, 26 Unchecked, 1.3s Time] [2022-11-20 10:44:24,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11415 states. [2022-11-20 10:44:24,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11415 to 11296. [2022-11-20 10:44:24,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11296 states, 11291 states have (on average 5.037286334248517) internal successors, (56876), 11295 states have internal predecessors, (56876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:24,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11296 states to 11296 states and 56876 transitions. [2022-11-20 10:44:24,939 INFO L78 Accepts]: Start accepts. Automaton has 11296 states and 56876 transitions. Word has length 15 [2022-11-20 10:44:24,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:44:24,939 INFO L495 AbstractCegarLoop]: Abstraction has 11296 states and 56876 transitions. [2022-11-20 10:44:24,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:24,939 INFO L276 IsEmpty]: Start isEmpty. Operand 11296 states and 56876 transitions. [2022-11-20 10:44:24,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:44:24,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:44:24,944 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:44:24,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (244)] Forceful destruction successful, exit code 0 [2022-11-20 10:44:25,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:44:25,145 INFO L420 AbstractCegarLoop]: === Iteration 244 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:44:25,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:44:25,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1670819628, now seen corresponding path program 4 times [2022-11-20 10:44:25,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:44:25,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1573077488] [2022-11-20 10:44:25,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:44:25,146 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:44:25,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:44:25,147 INFO L229 MonitoredProcess]: Starting monitored process 245 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:44:25,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (245)] Waiting until timeout for monitored process [2022-11-20 10:44:25,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:44:25,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:44:25,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 10:44:25,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:44:25,761 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:44:25,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:44:26,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:26,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:44:26,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:26,804 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:44:26,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1573077488] [2022-11-20 10:44:26,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1573077488] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:44:26,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:44:26,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:44:26,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363141927] [2022-11-20 10:44:26,805 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:44:26,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 10:44:26,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:44:26,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 10:44:26,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:44:26,806 INFO L87 Difference]: Start difference. First operand 11296 states and 56876 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:28,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:44:28,878 INFO L93 Difference]: Finished difference Result 11456 states and 57534 transitions. [2022-11-20 10:44:28,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 10:44:28,879 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 10:44:28,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:44:28,916 INFO L225 Difference]: With dead ends: 11456 [2022-11-20 10:44:28,917 INFO L226 Difference]: Without dead ends: 11456 [2022-11-20 10:44:28,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:44:28,917 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 37 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:44:28,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 54 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 164 Invalid, 0 Unknown, 50 Unchecked, 1.3s Time] [2022-11-20 10:44:28,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11456 states. [2022-11-20 10:44:29,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11456 to 11318. [2022-11-20 10:44:29,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11318 states, 11313 states have (on average 5.035622734906744) internal successors, (56968), 11317 states have internal predecessors, (56968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:29,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11318 states to 11318 states and 56968 transitions. [2022-11-20 10:44:29,273 INFO L78 Accepts]: Start accepts. Automaton has 11318 states and 56968 transitions. Word has length 15 [2022-11-20 10:44:29,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:44:29,274 INFO L495 AbstractCegarLoop]: Abstraction has 11318 states and 56968 transitions. [2022-11-20 10:44:29,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:29,274 INFO L276 IsEmpty]: Start isEmpty. Operand 11318 states and 56968 transitions. [2022-11-20 10:44:29,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:44:29,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:44:29,279 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:44:29,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (245)] Ended with exit code 0 [2022-11-20 10:44:29,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:44:29,479 INFO L420 AbstractCegarLoop]: === Iteration 245 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:44:29,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:44:29,480 INFO L85 PathProgramCache]: Analyzing trace with hash 64768812, now seen corresponding path program 5 times [2022-11-20 10:44:29,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:44:29,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [3059218] [2022-11-20 10:44:29,480 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:44:29,480 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:44:29,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:44:29,481 INFO L229 MonitoredProcess]: Starting monitored process 246 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:44:29,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (246)] Waiting until timeout for monitored process [2022-11-20 10:44:29,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:44:29,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:44:29,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 10:44:29,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:44:30,117 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:44:30,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:44:30,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:30,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:44:31,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:31,228 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:44:31,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [3059218] [2022-11-20 10:44:31,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [3059218] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:44:31,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:44:31,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:44:31,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536682377] [2022-11-20 10:44:31,228 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:44:31,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 10:44:31,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:44:31,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 10:44:31,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:44:31,229 INFO L87 Difference]: Start difference. First operand 11318 states and 56968 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:33,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:44:33,730 INFO L93 Difference]: Finished difference Result 11459 states and 57545 transitions. [2022-11-20 10:44:33,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 10:44:33,731 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 10:44:33,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:44:33,780 INFO L225 Difference]: With dead ends: 11459 [2022-11-20 10:44:33,780 INFO L226 Difference]: Without dead ends: 11459 [2022-11-20 10:44:33,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:44:33,780 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 49 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:44:33,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 69 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 188 Invalid, 0 Unknown, 98 Unchecked, 1.5s Time] [2022-11-20 10:44:33,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11459 states. [2022-11-20 10:44:34,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11459 to 11361. [2022-11-20 10:44:34,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11361 states, 11356 states have (on average 5.030732652342374) internal successors, (57129), 11360 states have internal predecessors, (57129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:34,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11361 states to 11361 states and 57129 transitions. [2022-11-20 10:44:34,156 INFO L78 Accepts]: Start accepts. Automaton has 11361 states and 57129 transitions. Word has length 15 [2022-11-20 10:44:34,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:44:34,157 INFO L495 AbstractCegarLoop]: Abstraction has 11361 states and 57129 transitions. [2022-11-20 10:44:34,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:34,157 INFO L276 IsEmpty]: Start isEmpty. Operand 11361 states and 57129 transitions. [2022-11-20 10:44:34,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:44:34,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:44:34,165 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:44:34,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (246)] Ended with exit code 0 [2022-11-20 10:44:34,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 246 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:44:34,366 INFO L420 AbstractCegarLoop]: === Iteration 246 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:44:34,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:44:34,366 INFO L85 PathProgramCache]: Analyzing trace with hash 25980930, now seen corresponding path program 2 times [2022-11-20 10:44:34,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:44:34,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1551725532] [2022-11-20 10:44:34,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:44:34,367 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:44:34,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:44:34,368 INFO L229 MonitoredProcess]: Starting monitored process 247 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:44:34,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (247)] Waiting until timeout for monitored process [2022-11-20 10:44:34,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:44:34,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:44:34,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 10:44:34,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:44:35,028 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:44:35,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:44:35,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:35,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:44:36,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:36,303 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:44:36,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1551725532] [2022-11-20 10:44:36,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1551725532] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:44:36,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:44:36,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:44:36,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891728453] [2022-11-20 10:44:36,304 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:44:36,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 10:44:36,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:44:36,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 10:44:36,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:44:36,304 INFO L87 Difference]: Start difference. First operand 11361 states and 57129 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:38,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:44:38,389 INFO L93 Difference]: Finished difference Result 11450 states and 57486 transitions. [2022-11-20 10:44:38,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 10:44:38,391 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 10:44:38,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:44:38,432 INFO L225 Difference]: With dead ends: 11450 [2022-11-20 10:44:38,432 INFO L226 Difference]: Without dead ends: 11450 [2022-11-20 10:44:38,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:44:38,432 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 38 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:44:38,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 58 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 154 Invalid, 0 Unknown, 55 Unchecked, 1.3s Time] [2022-11-20 10:44:38,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11450 states. [2022-11-20 10:44:38,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11450 to 11367. [2022-11-20 10:44:38,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11367 states, 11362 states have (on average 5.029836296426685) internal successors, (57149), 11366 states have internal predecessors, (57149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:38,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11367 states to 11367 states and 57149 transitions. [2022-11-20 10:44:38,873 INFO L78 Accepts]: Start accepts. Automaton has 11367 states and 57149 transitions. Word has length 15 [2022-11-20 10:44:38,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:44:38,873 INFO L495 AbstractCegarLoop]: Abstraction has 11367 states and 57149 transitions. [2022-11-20 10:44:38,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:38,873 INFO L276 IsEmpty]: Start isEmpty. Operand 11367 states and 57149 transitions. [2022-11-20 10:44:38,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:44:38,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:44:38,878 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:44:38,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (247)] Forceful destruction successful, exit code 0 [2022-11-20 10:44:39,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:44:39,079 INFO L420 AbstractCegarLoop]: === Iteration 247 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:44:39,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:44:39,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1950669140, now seen corresponding path program 6 times [2022-11-20 10:44:39,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:44:39,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [785179359] [2022-11-20 10:44:39,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:44:39,080 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:44:39,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:44:39,081 INFO L229 MonitoredProcess]: Starting monitored process 248 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:44:39,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (248)] Waiting until timeout for monitored process [2022-11-20 10:44:39,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 10:44:39,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:44:39,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 10:44:39,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:44:39,724 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:44:39,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:44:40,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:40,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:44:40,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:40,806 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:44:40,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [785179359] [2022-11-20 10:44:40,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [785179359] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:44:40,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:44:40,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 10:44:40,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660038519] [2022-11-20 10:44:40,807 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:44:40,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 10:44:40,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:44:40,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 10:44:40,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:44:40,807 INFO L87 Difference]: Start difference. First operand 11367 states and 57149 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:43,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:44:43,087 INFO L93 Difference]: Finished difference Result 11476 states and 57527 transitions. [2022-11-20 10:44:43,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 10:44:43,089 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 10:44:43,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:44:43,248 INFO L225 Difference]: With dead ends: 11476 [2022-11-20 10:44:43,248 INFO L226 Difference]: Without dead ends: 11476 [2022-11-20 10:44:43,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:44:43,248 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 46 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:44:43,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 54 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 202 Invalid, 0 Unknown, 79 Unchecked, 1.5s Time] [2022-11-20 10:44:43,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11476 states. [2022-11-20 10:44:43,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11476 to 11342. [2022-11-20 10:44:43,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11342 states, 11337 states have (on average 5.032724706712534) internal successors, (57056), 11341 states have internal predecessors, (57056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:43,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11342 states to 11342 states and 57056 transitions. [2022-11-20 10:44:43,499 INFO L78 Accepts]: Start accepts. Automaton has 11342 states and 57056 transitions. Word has length 15 [2022-11-20 10:44:43,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:44:43,499 INFO L495 AbstractCegarLoop]: Abstraction has 11342 states and 57056 transitions. [2022-11-20 10:44:43,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:43,500 INFO L276 IsEmpty]: Start isEmpty. Operand 11342 states and 57056 transitions. [2022-11-20 10:44:43,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:44:43,505 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:44:43,506 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:44:43,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (248)] Forceful destruction successful, exit code 0 [2022-11-20 10:44:43,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:44:43,707 INFO L420 AbstractCegarLoop]: === Iteration 248 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:44:43,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:44:43,707 INFO L85 PathProgramCache]: Analyzing trace with hash -43627812, now seen corresponding path program 1 times [2022-11-20 10:44:43,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:44:43,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1831010595] [2022-11-20 10:44:43,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:44:43,708 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:44:43,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:44:43,708 INFO L229 MonitoredProcess]: Starting monitored process 249 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:44:43,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (249)] Waiting until timeout for monitored process [2022-11-20 10:44:44,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:44:44,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:44:44,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:44:44,353 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:44:44,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:44:44,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:44:44,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:44:45,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:44:45,694 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:44:45,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1831010595] [2022-11-20 10:44:45,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1831010595] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:44:45,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:44:45,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 10:44:45,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285724612] [2022-11-20 10:44:45,695 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:44:45,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:44:45,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:44:45,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:44:45,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:44:45,696 INFO L87 Difference]: Start difference. First operand 11342 states and 57056 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:48,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:44:48,194 INFO L93 Difference]: Finished difference Result 11416 states and 57203 transitions. [2022-11-20 10:44:48,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 10:44:48,196 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 10:44:48,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:44:48,243 INFO L225 Difference]: With dead ends: 11416 [2022-11-20 10:44:48,243 INFO L226 Difference]: Without dead ends: 11416 [2022-11-20 10:44:48,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:44:48,244 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 65 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:44:48,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 89 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 332 Invalid, 0 Unknown, 119 Unchecked, 2.0s Time] [2022-11-20 10:44:48,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11416 states. [2022-11-20 10:44:48,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11416 to 11322. [2022-11-20 10:44:48,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11322 states, 11317 states have (on average 5.036493770433861) internal successors, (56998), 11321 states have internal predecessors, (56998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:48,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11322 states to 11322 states and 56998 transitions. [2022-11-20 10:44:48,610 INFO L78 Accepts]: Start accepts. Automaton has 11322 states and 56998 transitions. Word has length 15 [2022-11-20 10:44:48,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:44:48,610 INFO L495 AbstractCegarLoop]: Abstraction has 11322 states and 56998 transitions. [2022-11-20 10:44:48,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:48,611 INFO L276 IsEmpty]: Start isEmpty. Operand 11322 states and 56998 transitions. [2022-11-20 10:44:48,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:44:48,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:44:48,618 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:44:48,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (249)] Ended with exit code 0 [2022-11-20 10:44:48,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:44:48,819 INFO L420 AbstractCegarLoop]: === Iteration 249 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:44:48,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:44:48,819 INFO L85 PathProgramCache]: Analyzing trace with hash -43760802, now seen corresponding path program 2 times [2022-11-20 10:44:48,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:44:48,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1040524488] [2022-11-20 10:44:48,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:44:48,820 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:44:48,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:44:48,821 INFO L229 MonitoredProcess]: Starting monitored process 250 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:44:48,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (250)] Waiting until timeout for monitored process [2022-11-20 10:44:49,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:44:49,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:44:49,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:44:49,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:44:49,490 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:44:49,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:44:49,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:44:49,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:44:50,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:44:50,929 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:44:50,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1040524488] [2022-11-20 10:44:50,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1040524488] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:44:50,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:44:50,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 10:44:50,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750835298] [2022-11-20 10:44:50,929 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:44:50,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:44:50,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:44:50,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:44:50,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:44:50,930 INFO L87 Difference]: Start difference. First operand 11322 states and 56998 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:53,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:44:53,284 INFO L93 Difference]: Finished difference Result 11398 states and 57170 transitions. [2022-11-20 10:44:53,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 10:44:53,285 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 10:44:53,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:44:53,331 INFO L225 Difference]: With dead ends: 11398 [2022-11-20 10:44:53,331 INFO L226 Difference]: Without dead ends: 11398 [2022-11-20 10:44:53,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:44:53,331 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 86 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:44:53,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 70 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 279 Invalid, 0 Unknown, 99 Unchecked, 1.8s Time] [2022-11-20 10:44:53,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11398 states. [2022-11-20 10:44:53,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11398 to 11331. [2022-11-20 10:44:53,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11331 states, 11326 states have (on average 5.035405262228501) internal successors, (57031), 11330 states have internal predecessors, (57031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:53,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11331 states to 11331 states and 57031 transitions. [2022-11-20 10:44:53,677 INFO L78 Accepts]: Start accepts. Automaton has 11331 states and 57031 transitions. Word has length 15 [2022-11-20 10:44:53,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:44:53,677 INFO L495 AbstractCegarLoop]: Abstraction has 11331 states and 57031 transitions. [2022-11-20 10:44:53,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:53,678 INFO L276 IsEmpty]: Start isEmpty. Operand 11331 states and 57031 transitions. [2022-11-20 10:44:53,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:44:53,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:44:53,686 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:44:53,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (250)] Ended with exit code 0 [2022-11-20 10:44:53,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:44:53,887 INFO L420 AbstractCegarLoop]: === Iteration 250 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:44:53,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:44:53,887 INFO L85 PathProgramCache]: Analyzing trace with hash -47883492, now seen corresponding path program 3 times [2022-11-20 10:44:53,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:44:53,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1462445663] [2022-11-20 10:44:53,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:44:53,888 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:44:53,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:44:53,889 INFO L229 MonitoredProcess]: Starting monitored process 251 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:44:53,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (251)] Waiting until timeout for monitored process [2022-11-20 10:44:54,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:44:54,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:44:54,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:44:54,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:44:54,592 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:44:54,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:44:54,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:44:54,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:44:56,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:44:56,012 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:44:56,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1462445663] [2022-11-20 10:44:56,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1462445663] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:44:56,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:44:56,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 10:44:56,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296388724] [2022-11-20 10:44:56,013 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:44:56,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:44:56,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:44:56,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:44:56,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:44:56,014 INFO L87 Difference]: Start difference. First operand 11331 states and 57031 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:58,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:44:58,866 INFO L93 Difference]: Finished difference Result 11564 states and 57691 transitions. [2022-11-20 10:44:58,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 10:44:58,867 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 10:44:58,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:44:58,916 INFO L225 Difference]: With dead ends: 11564 [2022-11-20 10:44:58,916 INFO L226 Difference]: Without dead ends: 11564 [2022-11-20 10:44:58,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:44:58,917 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 136 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:44:58,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 91 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 355 Invalid, 0 Unknown, 213 Unchecked, 2.3s Time] [2022-11-20 10:44:58,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11564 states. [2022-11-20 10:44:59,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11564 to 11341. [2022-11-20 10:44:59,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11341 states, 11336 states have (on average 5.0333450952717005) internal successors, (57058), 11340 states have internal predecessors, (57058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:59,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11341 states to 11341 states and 57058 transitions. [2022-11-20 10:44:59,275 INFO L78 Accepts]: Start accepts. Automaton has 11341 states and 57058 transitions. Word has length 15 [2022-11-20 10:44:59,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:44:59,275 INFO L495 AbstractCegarLoop]: Abstraction has 11341 states and 57058 transitions. [2022-11-20 10:44:59,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:59,275 INFO L276 IsEmpty]: Start isEmpty. Operand 11341 states and 57058 transitions. [2022-11-20 10:44:59,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:44:59,281 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:44:59,281 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:44:59,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (251)] Ended with exit code 0 [2022-11-20 10:44:59,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:44:59,482 INFO L420 AbstractCegarLoop]: === Iteration 251 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:44:59,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:44:59,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1826943507, now seen corresponding path program 1 times [2022-11-20 10:44:59,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:44:59,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2128177384] [2022-11-20 10:44:59,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:44:59,483 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:44:59,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:44:59,484 INFO L229 MonitoredProcess]: Starting monitored process 252 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:44:59,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (252)] Waiting until timeout for monitored process [2022-11-20 10:44:59,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:44:59,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:44:59,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:45:00,137 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:45:00,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:45:00,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:45:00,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:45:01,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:45:01,512 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:45:01,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2128177384] [2022-11-20 10:45:01,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2128177384] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:45:01,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:45:01,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 10:45:01,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151790056] [2022-11-20 10:45:01,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:45:01,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:45:01,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:45:01,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:45:01,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:45:01,513 INFO L87 Difference]: Start difference. First operand 11341 states and 57058 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:04,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:45:04,024 INFO L93 Difference]: Finished difference Result 11562 states and 57743 transitions. [2022-11-20 10:45:04,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 10:45:04,025 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 10:45:04,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:45:04,063 INFO L225 Difference]: With dead ends: 11562 [2022-11-20 10:45:04,063 INFO L226 Difference]: Without dead ends: 11562 [2022-11-20 10:45:04,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:45:04,063 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 140 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:45:04,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 84 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 307 Invalid, 0 Unknown, 145 Unchecked, 1.8s Time] [2022-11-20 10:45:04,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11562 states. [2022-11-20 10:45:04,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11562 to 11420. [2022-11-20 10:45:04,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11420 states, 11415 states have (on average 5.023215067893123) internal successors, (57340), 11419 states have internal predecessors, (57340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:04,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11420 states to 11420 states and 57340 transitions. [2022-11-20 10:45:04,369 INFO L78 Accepts]: Start accepts. Automaton has 11420 states and 57340 transitions. Word has length 15 [2022-11-20 10:45:04,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:45:04,370 INFO L495 AbstractCegarLoop]: Abstraction has 11420 states and 57340 transitions. [2022-11-20 10:45:04,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:04,370 INFO L276 IsEmpty]: Start isEmpty. Operand 11420 states and 57340 transitions. [2022-11-20 10:45:04,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:45:04,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:45:04,375 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:45:04,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (252)] Ended with exit code 0 [2022-11-20 10:45:04,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:45:04,576 INFO L420 AbstractCegarLoop]: === Iteration 252 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:45:04,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:45:04,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1719974662, now seen corresponding path program 4 times [2022-11-20 10:45:04,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:45:04,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [972434086] [2022-11-20 10:45:04,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:45:04,576 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:45:04,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:45:04,577 INFO L229 MonitoredProcess]: Starting monitored process 253 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:45:04,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (253)] Waiting until timeout for monitored process [2022-11-20 10:45:05,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:45:05,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:45:05,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:45:05,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:45:05,217 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:45:05,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:45:05,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:45:05,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:45:06,529 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:45:06,529 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:45:06,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [972434086] [2022-11-20 10:45:06,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [972434086] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:45:06,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:45:06,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 10:45:06,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654217487] [2022-11-20 10:45:06,530 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:45:06,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:45:06,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:45:06,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:45:06,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:45:06,531 INFO L87 Difference]: Start difference. First operand 11420 states and 57340 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:09,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:45:09,078 INFO L93 Difference]: Finished difference Result 11579 states and 57787 transitions. [2022-11-20 10:45:09,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 10:45:09,079 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 10:45:09,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:45:09,122 INFO L225 Difference]: With dead ends: 11579 [2022-11-20 10:45:09,122 INFO L226 Difference]: Without dead ends: 11579 [2022-11-20 10:45:09,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:45:09,123 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 103 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:45:09,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 85 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 330 Invalid, 0 Unknown, 111 Unchecked, 2.0s Time] [2022-11-20 10:45:09,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11579 states. [2022-11-20 10:45:09,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11579 to 11414. [2022-11-20 10:45:09,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11414 states, 11409 states have (on average 5.024016127618546) internal successors, (57319), 11413 states have internal predecessors, (57319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:09,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11414 states to 11414 states and 57319 transitions. [2022-11-20 10:45:09,435 INFO L78 Accepts]: Start accepts. Automaton has 11414 states and 57319 transitions. Word has length 15 [2022-11-20 10:45:09,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:45:09,435 INFO L495 AbstractCegarLoop]: Abstraction has 11414 states and 57319 transitions. [2022-11-20 10:45:09,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:09,435 INFO L276 IsEmpty]: Start isEmpty. Operand 11414 states and 57319 transitions. [2022-11-20 10:45:09,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:45:09,531 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:45:09,531 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:45:09,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (253)] Ended with exit code 0 [2022-11-20 10:45:09,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:45:09,732 INFO L420 AbstractCegarLoop]: === Iteration 253 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:45:09,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:45:09,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1190382582, now seen corresponding path program 5 times [2022-11-20 10:45:09,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:45:09,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1205785347] [2022-11-20 10:45:09,733 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:45:09,733 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:45:09,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:45:09,735 INFO L229 MonitoredProcess]: Starting monitored process 254 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:45:09,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (254)] Waiting until timeout for monitored process [2022-11-20 10:45:10,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:45:10,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:45:10,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:45:10,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:45:10,441 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:45:10,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:45:10,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:45:10,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:45:12,462 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:45:12,462 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:45:12,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1205785347] [2022-11-20 10:45:12,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1205785347] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:45:12,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:45:12,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 10:45:12,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389081437] [2022-11-20 10:45:12,463 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:45:12,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 10:45:12,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:45:12,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 10:45:12,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:45:12,464 INFO L87 Difference]: Start difference. First operand 11414 states and 57319 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:17,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:45:17,168 INFO L93 Difference]: Finished difference Result 12444 states and 60588 transitions. [2022-11-20 10:45:17,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 10:45:17,170 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 10:45:17,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:45:17,210 INFO L225 Difference]: With dead ends: 12444 [2022-11-20 10:45:17,210 INFO L226 Difference]: Without dead ends: 12444 [2022-11-20 10:45:17,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2022-11-20 10:45:17,210 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 278 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 635 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:45:17,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 121 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 436 Invalid, 0 Unknown, 635 Unchecked, 3.3s Time] [2022-11-20 10:45:17,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12444 states. [2022-11-20 10:45:17,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12444 to 11331. [2022-11-20 10:45:17,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11331 states, 11326 states have (on average 5.027635528871623) internal successors, (56943), 11330 states have internal predecessors, (56943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:17,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11331 states to 11331 states and 56943 transitions. [2022-11-20 10:45:17,475 INFO L78 Accepts]: Start accepts. Automaton has 11331 states and 56943 transitions. Word has length 15 [2022-11-20 10:45:17,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:45:17,475 INFO L495 AbstractCegarLoop]: Abstraction has 11331 states and 56943 transitions. [2022-11-20 10:45:17,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:17,475 INFO L276 IsEmpty]: Start isEmpty. Operand 11331 states and 56943 transitions. [2022-11-20 10:45:17,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:45:17,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:45:17,481 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:45:17,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (254)] Ended with exit code 0 [2022-11-20 10:45:17,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 254 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:45:17,681 INFO L420 AbstractCegarLoop]: === Iteration 254 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:45:17,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:45:17,681 INFO L85 PathProgramCache]: Analyzing trace with hash -2059441761, now seen corresponding path program 2 times [2022-11-20 10:45:17,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:45:17,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [164049247] [2022-11-20 10:45:17,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:45:17,682 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:45:17,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:45:17,683 INFO L229 MonitoredProcess]: Starting monitored process 255 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:45:17,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (255)] Waiting until timeout for monitored process [2022-11-20 10:45:18,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:45:18,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:45:18,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:45:18,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:45:18,364 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:45:18,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:45:18,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:45:18,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:45:19,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:45:19,740 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:45:19,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [164049247] [2022-11-20 10:45:19,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [164049247] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:45:19,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:45:19,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 10:45:19,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730086358] [2022-11-20 10:45:19,740 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:45:19,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:45:19,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:45:19,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:45:19,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:45:19,741 INFO L87 Difference]: Start difference. First operand 11331 states and 56943 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:21,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:45:21,904 INFO L93 Difference]: Finished difference Result 11407 states and 57135 transitions. [2022-11-20 10:45:21,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 10:45:21,906 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 10:45:21,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:45:21,950 INFO L225 Difference]: With dead ends: 11407 [2022-11-20 10:45:21,951 INFO L226 Difference]: Without dead ends: 11407 [2022-11-20 10:45:21,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:45:21,951 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 89 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:45:21,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 75 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 266 Invalid, 0 Unknown, 78 Unchecked, 1.7s Time] [2022-11-20 10:45:21,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11407 states. [2022-11-20 10:45:22,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11407 to 11340. [2022-11-20 10:45:22,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11340 states, 11335 states have (on average 5.026731363034848) internal successors, (56978), 11339 states have internal predecessors, (56978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:22,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11340 states to 11340 states and 56978 transitions. [2022-11-20 10:45:22,220 INFO L78 Accepts]: Start accepts. Automaton has 11340 states and 56978 transitions. Word has length 15 [2022-11-20 10:45:22,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:45:22,220 INFO L495 AbstractCegarLoop]: Abstraction has 11340 states and 56978 transitions. [2022-11-20 10:45:22,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:22,220 INFO L276 IsEmpty]: Start isEmpty. Operand 11340 states and 56978 transitions. [2022-11-20 10:45:22,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:45:22,225 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:45:22,225 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:45:22,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (255)] Ended with exit code 0 [2022-11-20 10:45:22,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:45:22,426 INFO L420 AbstractCegarLoop]: === Iteration 255 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:45:22,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:45:22,426 INFO L85 PathProgramCache]: Analyzing trace with hash -2058746958, now seen corresponding path program 6 times [2022-11-20 10:45:22,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:45:22,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2062950074] [2022-11-20 10:45:22,427 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:45:22,427 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:45:22,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:45:22,428 INFO L229 MonitoredProcess]: Starting monitored process 256 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:45:22,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (256)] Waiting until timeout for monitored process [2022-11-20 10:45:22,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-20 10:45:22,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:45:22,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:45:22,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:45:23,124 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:45:23,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:45:23,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:45:23,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:45:24,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:45:24,502 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:45:24,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2062950074] [2022-11-20 10:45:24,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2062950074] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:45:24,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:45:24,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 10:45:24,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581093014] [2022-11-20 10:45:24,503 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:45:24,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:45:24,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:45:24,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:45:24,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:45:24,504 INFO L87 Difference]: Start difference. First operand 11340 states and 56978 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:26,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:45:26,870 INFO L93 Difference]: Finished difference Result 11446 states and 57229 transitions. [2022-11-20 10:45:26,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 10:45:26,872 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 10:45:26,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:45:26,912 INFO L225 Difference]: With dead ends: 11446 [2022-11-20 10:45:26,912 INFO L226 Difference]: Without dead ends: 11446 [2022-11-20 10:45:26,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:45:26,913 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 100 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:45:26,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 87 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 300 Invalid, 0 Unknown, 124 Unchecked, 1.9s Time] [2022-11-20 10:45:26,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11446 states. [2022-11-20 10:45:27,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11446 to 11325. [2022-11-20 10:45:27,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11325 states, 11320 states have (on average 5.0290636042402825) internal successors, (56929), 11324 states have internal predecessors, (56929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:27,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11325 states to 11325 states and 56929 transitions. [2022-11-20 10:45:27,178 INFO L78 Accepts]: Start accepts. Automaton has 11325 states and 56929 transitions. Word has length 15 [2022-11-20 10:45:27,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:45:27,178 INFO L495 AbstractCegarLoop]: Abstraction has 11325 states and 56929 transitions. [2022-11-20 10:45:27,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:27,178 INFO L276 IsEmpty]: Start isEmpty. Operand 11325 states and 56929 transitions. [2022-11-20 10:45:27,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:45:27,186 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:45:27,186 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:45:27,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (256)] Ended with exit code 0 [2022-11-20 10:45:27,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:45:27,388 INFO L420 AbstractCegarLoop]: === Iteration 256 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:45:27,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:45:27,388 INFO L85 PathProgramCache]: Analyzing trace with hash -2056959498, now seen corresponding path program 7 times [2022-11-20 10:45:27,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:45:27,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [643338648] [2022-11-20 10:45:27,389 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:45:27,389 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:45:27,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:45:27,391 INFO L229 MonitoredProcess]: Starting monitored process 257 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:45:27,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (257)] Waiting until timeout for monitored process [2022-11-20 10:45:27,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:45:27,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:45:27,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:45:28,026 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:45:28,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:45:28,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:45:28,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:45:29,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:45:29,310 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:45:29,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [643338648] [2022-11-20 10:45:29,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [643338648] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:45:29,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:45:29,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 10:45:29,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708302083] [2022-11-20 10:45:29,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:45:29,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:45:29,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:45:29,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:45:29,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:45:29,312 INFO L87 Difference]: Start difference. First operand 11325 states and 56929 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:31,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:45:31,899 INFO L93 Difference]: Finished difference Result 11476 states and 57331 transitions. [2022-11-20 10:45:31,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 10:45:31,901 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 10:45:31,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:45:31,943 INFO L225 Difference]: With dead ends: 11476 [2022-11-20 10:45:31,943 INFO L226 Difference]: Without dead ends: 11476 [2022-11-20 10:45:31,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:45:31,944 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 123 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:45:31,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 74 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 304 Invalid, 0 Unknown, 107 Unchecked, 2.1s Time] [2022-11-20 10:45:31,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11476 states. [2022-11-20 10:45:32,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11476 to 11327. [2022-11-20 10:45:32,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11327 states, 11322 states have (on average 5.029146793852676) internal successors, (56940), 11326 states have internal predecessors, (56940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:32,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11327 states to 11327 states and 56940 transitions. [2022-11-20 10:45:32,330 INFO L78 Accepts]: Start accepts. Automaton has 11327 states and 56940 transitions. Word has length 15 [2022-11-20 10:45:32,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:45:32,331 INFO L495 AbstractCegarLoop]: Abstraction has 11327 states and 56940 transitions. [2022-11-20 10:45:32,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:32,331 INFO L276 IsEmpty]: Start isEmpty. Operand 11327 states and 56940 transitions. [2022-11-20 10:45:32,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:45:32,336 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:45:32,336 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:45:32,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (257)] Forceful destruction successful, exit code 0 [2022-11-20 10:45:32,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:45:32,541 INFO L420 AbstractCegarLoop]: === Iteration 257 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:45:32,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:45:32,542 INFO L85 PathProgramCache]: Analyzing trace with hash 521444508, now seen corresponding path program 8 times [2022-11-20 10:45:32,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:45:32,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1718195422] [2022-11-20 10:45:32,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:45:32,543 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:45:32,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:45:32,544 INFO L229 MonitoredProcess]: Starting monitored process 258 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:45:32,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (258)] Waiting until timeout for monitored process [2022-11-20 10:45:33,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:45:33,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:45:33,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:45:33,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:45:33,235 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:45:33,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:45:33,544 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:45:33,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:45:34,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:45:34,573 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:45:34,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1718195422] [2022-11-20 10:45:34,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1718195422] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:45:34,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:45:34,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 10:45:34,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358572725] [2022-11-20 10:45:34,573 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:45:34,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:45:34,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:45:34,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:45:34,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:45:34,574 INFO L87 Difference]: Start difference. First operand 11327 states and 56940 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:37,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:45:37,137 INFO L93 Difference]: Finished difference Result 11516 states and 57419 transitions. [2022-11-20 10:45:37,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 10:45:37,139 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 10:45:37,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:45:37,172 INFO L225 Difference]: With dead ends: 11516 [2022-11-20 10:45:37,173 INFO L226 Difference]: Without dead ends: 11516 [2022-11-20 10:45:37,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:45:37,173 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 95 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:45:37,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 95 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 373 Invalid, 0 Unknown, 180 Unchecked, 2.1s Time] [2022-11-20 10:45:37,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11516 states. [2022-11-20 10:45:37,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11516 to 11317. [2022-11-20 10:45:37,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11317 states, 11312 states have (on average 5.030498585572843) internal successors, (56905), 11316 states have internal predecessors, (56905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:37,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11317 states to 11317 states and 56905 transitions. [2022-11-20 10:45:37,510 INFO L78 Accepts]: Start accepts. Automaton has 11317 states and 56905 transitions. Word has length 15 [2022-11-20 10:45:37,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:45:37,510 INFO L495 AbstractCegarLoop]: Abstraction has 11317 states and 56905 transitions. [2022-11-20 10:45:37,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:37,511 INFO L276 IsEmpty]: Start isEmpty. Operand 11317 states and 56905 transitions. [2022-11-20 10:45:37,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:45:37,516 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:45:37,516 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:45:37,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (258)] Ended with exit code 0 [2022-11-20 10:45:37,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:45:37,717 INFO L420 AbstractCegarLoop]: === Iteration 258 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:45:37,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:45:37,717 INFO L85 PathProgramCache]: Analyzing trace with hash 523231968, now seen corresponding path program 9 times [2022-11-20 10:45:37,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:45:37,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1379238170] [2022-11-20 10:45:37,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:45:37,718 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:45:37,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:45:37,719 INFO L229 MonitoredProcess]: Starting monitored process 259 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:45:37,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (259)] Waiting until timeout for monitored process [2022-11-20 10:45:38,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:45:38,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:45:38,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:45:38,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:45:38,385 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:45:38,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:45:38,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:45:38,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:45:39,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:45:39,759 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:45:39,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1379238170] [2022-11-20 10:45:39,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1379238170] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:45:39,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:45:39,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 10:45:39,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470464121] [2022-11-20 10:45:39,760 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:45:39,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:45:39,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:45:39,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:45:39,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:45:39,761 INFO L87 Difference]: Start difference. First operand 11317 states and 56905 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:41,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:45:41,046 INFO L93 Difference]: Finished difference Result 11382 states and 57101 transitions. [2022-11-20 10:45:41,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 10:45:41,047 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 10:45:41,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:45:41,087 INFO L225 Difference]: With dead ends: 11382 [2022-11-20 10:45:41,087 INFO L226 Difference]: Without dead ends: 11382 [2022-11-20 10:45:41,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:45:41,088 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 41 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:45:41,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 84 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 159 Invalid, 0 Unknown, 157 Unchecked, 0.9s Time] [2022-11-20 10:45:41,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11382 states. [2022-11-20 10:45:41,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11382 to 11320. [2022-11-20 10:45:41,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11320 states, 11315 states have (on average 5.030755634114008) internal successors, (56923), 11319 states have internal predecessors, (56923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:41,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11320 states to 11320 states and 56923 transitions. [2022-11-20 10:45:41,352 INFO L78 Accepts]: Start accepts. Automaton has 11320 states and 56923 transitions. Word has length 15 [2022-11-20 10:45:41,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:45:41,352 INFO L495 AbstractCegarLoop]: Abstraction has 11320 states and 56923 transitions. [2022-11-20 10:45:41,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:41,353 INFO L276 IsEmpty]: Start isEmpty. Operand 11320 states and 56923 transitions. [2022-11-20 10:45:41,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:45:41,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:45:41,358 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:45:41,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (259)] Forceful destruction successful, exit code 0 [2022-11-20 10:45:41,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:45:41,559 INFO L420 AbstractCegarLoop]: === Iteration 259 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:45:41,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:45:41,560 INFO L85 PathProgramCache]: Analyzing trace with hash 360111452, now seen corresponding path program 10 times [2022-11-20 10:45:41,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:45:41,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [792087838] [2022-11-20 10:45:41,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:45:41,560 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:45:41,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:45:41,562 INFO L229 MonitoredProcess]: Starting monitored process 260 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:45:41,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (260)] Waiting until timeout for monitored process [2022-11-20 10:45:42,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:45:42,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:45:42,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:45:42,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:45:42,238 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:45:42,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:45:42,544 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:45:42,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:45:43,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:45:43,556 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:45:43,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [792087838] [2022-11-20 10:45:43,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [792087838] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:45:43,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:45:43,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 10:45:43,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816313556] [2022-11-20 10:45:43,557 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:45:43,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:45:43,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:45:43,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:45:43,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:45:43,557 INFO L87 Difference]: Start difference. First operand 11320 states and 56923 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:46,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:45:46,340 INFO L93 Difference]: Finished difference Result 11501 states and 57383 transitions. [2022-11-20 10:45:46,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 10:45:46,342 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 10:45:46,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:45:46,384 INFO L225 Difference]: With dead ends: 11501 [2022-11-20 10:45:46,384 INFO L226 Difference]: Without dead ends: 11501 [2022-11-20 10:45:46,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:45:46,384 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 109 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:45:46,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 77 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 365 Invalid, 0 Unknown, 120 Unchecked, 2.3s Time] [2022-11-20 10:45:46,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11501 states. [2022-11-20 10:45:46,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11501 to 11318. [2022-11-20 10:45:46,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11318 states, 11313 states have (on average 5.0311146468664365) internal successors, (56917), 11317 states have internal predecessors, (56917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:46,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11318 states to 11318 states and 56917 transitions. [2022-11-20 10:45:46,672 INFO L78 Accepts]: Start accepts. Automaton has 11318 states and 56917 transitions. Word has length 15 [2022-11-20 10:45:46,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:45:46,673 INFO L495 AbstractCegarLoop]: Abstraction has 11318 states and 56917 transitions. [2022-11-20 10:45:46,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:46,673 INFO L276 IsEmpty]: Start isEmpty. Operand 11318 states and 56917 transitions. [2022-11-20 10:45:46,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:45:46,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:45:46,678 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:45:46,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (260)] Forceful destruction successful, exit code 0 [2022-11-20 10:45:46,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:45:46,879 INFO L420 AbstractCegarLoop]: === Iteration 260 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:45:46,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:45:46,879 INFO L85 PathProgramCache]: Analyzing trace with hash 359978462, now seen corresponding path program 11 times [2022-11-20 10:45:46,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:45:46,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1766424364] [2022-11-20 10:45:46,879 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:45:46,879 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 [2022-11-20 10:45:46,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:45:46,880 INFO L229 MonitoredProcess]: Starting monitored process 261 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:45:46,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (261)] Waiting until timeout for monitored process [2022-11-20 10:45:47,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:45:47,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:45:47,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:45:47,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:45:47,555 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:45:47,555 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 [2022-11-20 10:45:47,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:45:47,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:45:49,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:45:49,135 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:45:49,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1766424364] [2022-11-20 10:45:49,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1766424364] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:45:49,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:45:49,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 10:45:49,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705376325] [2022-11-20 10:45:49,135 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:45:49,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:45:49,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:45:49,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:45:49,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:45:49,136 INFO L87 Difference]: Start difference. First operand 11318 states and 56917 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:51,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:45:51,805 INFO L93 Difference]: Finished difference Result 11577 states and 57591 transitions. [2022-11-20 10:45:51,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 10:45:51,807 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 10:45:51,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:45:51,845 INFO L225 Difference]: With dead ends: 11577 [2022-11-20 10:45:51,845 INFO L226 Difference]: Without dead ends: 11577 [2022-11-20 10:45:51,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:45:51,846 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 151 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:45:51,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 56 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 245 Invalid, 0 Unknown, 201 Unchecked, 1.9s Time] [2022-11-20 10:45:51,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11577 states. [2022-11-20 10:45:52,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11577 to 11331. [2022-11-20 10:45:52,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11331 states, 11326 states have (on average 5.029401377361823) internal successors, (56963), 11330 states have internal predecessors, (56963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:52,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11331 states to 11331 states and 56963 transitions. [2022-11-20 10:45:52,104 INFO L78 Accepts]: Start accepts. Automaton has 11331 states and 56963 transitions. Word has length 15 [2022-11-20 10:45:52,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:45:52,104 INFO L495 AbstractCegarLoop]: Abstraction has 11331 states and 56963 transitions. [2022-11-20 10:45:52,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:52,104 INFO L276 IsEmpty]: Start isEmpty. Operand 11331 states and 56963 transitions. [2022-11-20 10:45:52,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:45:52,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:45:52,110 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:45:52,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (261)] Ended with exit code 0 [2022-11-20 10:45:52,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:45:52,310 INFO L420 AbstractCegarLoop]: === Iteration 261 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:45:52,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:45:52,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1553792588, now seen corresponding path program 12 times [2022-11-20 10:45:52,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:45:52,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1544072963] [2022-11-20 10:45:52,311 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:45:52,311 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:45:52,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:45:52,312 INFO L229 MonitoredProcess]: Starting monitored process 262 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:45:52,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (262)] Waiting until timeout for monitored process [2022-11-20 10:45:52,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-20 10:45:52,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:45:52,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:45:52,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:45:53,007 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:45:53,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:45:53,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:45:53,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:45:54,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:45:54,298 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:45:54,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1544072963] [2022-11-20 10:45:54,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1544072963] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:45:54,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:45:54,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 10:45:54,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473428895] [2022-11-20 10:45:54,299 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:45:54,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:45:54,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:45:54,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:45:54,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:45:54,299 INFO L87 Difference]: Start difference. First operand 11331 states and 56963 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:57,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:45:57,035 INFO L93 Difference]: Finished difference Result 11637 states and 57710 transitions. [2022-11-20 10:45:57,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 10:45:57,037 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 10:45:57,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:45:57,074 INFO L225 Difference]: With dead ends: 11637 [2022-11-20 10:45:57,075 INFO L226 Difference]: Without dead ends: 11637 [2022-11-20 10:45:57,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:45:57,075 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 186 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:45:57,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 73 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 355 Invalid, 0 Unknown, 153 Unchecked, 2.2s Time] [2022-11-20 10:45:57,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11637 states. [2022-11-20 10:45:57,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11637 to 11320. [2022-11-20 10:45:57,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11320 states, 11315 states have (on average 5.02960671674768) internal successors, (56910), 11319 states have internal predecessors, (56910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:57,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11320 states to 11320 states and 56910 transitions. [2022-11-20 10:45:57,465 INFO L78 Accepts]: Start accepts. Automaton has 11320 states and 56910 transitions. Word has length 15 [2022-11-20 10:45:57,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:45:57,465 INFO L495 AbstractCegarLoop]: Abstraction has 11320 states and 56910 transitions. [2022-11-20 10:45:57,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:57,465 INFO L276 IsEmpty]: Start isEmpty. Operand 11320 states and 56910 transitions. [2022-11-20 10:45:57,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:45:57,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:45:57,471 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:45:57,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (262)] Forceful destruction successful, exit code 0 [2022-11-20 10:45:57,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 262 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:45:57,685 INFO L420 AbstractCegarLoop]: === Iteration 262 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:45:57,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:45:57,686 INFO L85 PathProgramCache]: Analyzing trace with hash 833590882, now seen corresponding path program 13 times [2022-11-20 10:45:57,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:45:57,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [123707608] [2022-11-20 10:45:57,686 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:45:57,686 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 [2022-11-20 10:45:57,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:45:57,687 INFO L229 MonitoredProcess]: Starting monitored process 263 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:45:57,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (263)] Waiting until timeout for monitored process [2022-11-20 10:45:58,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:45:58,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:45:58,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:45:58,345 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:45:58,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:45:58,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:45:58,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:45:59,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:45:59,628 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:45:59,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [123707608] [2022-11-20 10:45:59,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [123707608] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:45:59,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:45:59,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 10:45:59,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751809729] [2022-11-20 10:45:59,629 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:45:59,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:45:59,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:45:59,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:45:59,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:45:59,630 INFO L87 Difference]: Start difference. First operand 11320 states and 56910 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:46:01,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:46:01,891 INFO L93 Difference]: Finished difference Result 11382 states and 57032 transitions. [2022-11-20 10:46:01,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 10:46:01,892 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 10:46:01,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:46:01,927 INFO L225 Difference]: With dead ends: 11382 [2022-11-20 10:46:01,927 INFO L226 Difference]: Without dead ends: 11382 [2022-11-20 10:46:01,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:46:01,928 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 109 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:46:01,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 71 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 283 Invalid, 0 Unknown, 83 Unchecked, 1.7s Time] [2022-11-20 10:46:01,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11382 states. [2022-11-20 10:46:02,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11382 to 11327. [2022-11-20 10:46:02,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11327 states, 11322 states have (on average 5.029146793852676) internal successors, (56940), 11326 states have internal predecessors, (56940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:46:02,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11327 states to 11327 states and 56940 transitions. [2022-11-20 10:46:02,176 INFO L78 Accepts]: Start accepts. Automaton has 11327 states and 56940 transitions. Word has length 15 [2022-11-20 10:46:02,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:46:02,176 INFO L495 AbstractCegarLoop]: Abstraction has 11327 states and 56940 transitions. [2022-11-20 10:46:02,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:46:02,176 INFO L276 IsEmpty]: Start isEmpty. Operand 11327 states and 56940 transitions. [2022-11-20 10:46:02,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:46:02,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:46:02,182 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:46:02,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (263)] Ended with exit code 0 [2022-11-20 10:46:02,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:46:02,382 INFO L420 AbstractCegarLoop]: === Iteration 263 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:46:02,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:46:02,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1166653088, now seen corresponding path program 14 times [2022-11-20 10:46:02,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:46:02,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [810371924] [2022-11-20 10:46:02,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:46:02,383 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 [2022-11-20 10:46:02,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:46:02,384 INFO L229 MonitoredProcess]: Starting monitored process 264 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:46:02,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (264)] Waiting until timeout for monitored process [2022-11-20 10:46:02,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:46:02,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:46:02,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:46:02,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:46:03,069 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:46:03,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:46:03,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:46:03,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:46:04,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:46:04,385 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:46:04,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [810371924] [2022-11-20 10:46:04,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [810371924] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:46:04,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:46:04,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 10:46:04,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283809408] [2022-11-20 10:46:04,385 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:46:04,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:46:04,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:46:04,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:46:04,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:46:04,386 INFO L87 Difference]: Start difference. First operand 11327 states and 56940 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:46:06,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:46:06,558 INFO L93 Difference]: Finished difference Result 11492 states and 57307 transitions. [2022-11-20 10:46:06,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 10:46:06,559 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 10:46:06,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:46:06,597 INFO L225 Difference]: With dead ends: 11492 [2022-11-20 10:46:06,598 INFO L226 Difference]: Without dead ends: 11492 [2022-11-20 10:46:06,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:46:06,598 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 175 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:46:06,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 67 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 276 Invalid, 0 Unknown, 107 Unchecked, 1.7s Time] [2022-11-20 10:46:06,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11492 states. [2022-11-20 10:46:06,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11492 to 11296. [2022-11-20 10:46:06,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11296 states, 11291 states have (on average 5.033123726862103) internal successors, (56829), 11295 states have internal predecessors, (56829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:46:06,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11296 states to 11296 states and 56829 transitions. [2022-11-20 10:46:06,854 INFO L78 Accepts]: Start accepts. Automaton has 11296 states and 56829 transitions. Word has length 15 [2022-11-20 10:46:06,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:46:06,854 INFO L495 AbstractCegarLoop]: Abstraction has 11296 states and 56829 transitions. [2022-11-20 10:46:06,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:46:06,854 INFO L276 IsEmpty]: Start isEmpty. Operand 11296 states and 56829 transitions. [2022-11-20 10:46:06,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:46:06,859 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:46:06,859 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:46:06,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (264)] Ended with exit code 0 [2022-11-20 10:46:07,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:46:07,060 INFO L420 AbstractCegarLoop]: === Iteration 264 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:46:07,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:46:07,060 INFO L85 PathProgramCache]: Analyzing trace with hash 263795101, now seen corresponding path program 3 times [2022-11-20 10:46:07,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:46:07,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [929582815] [2022-11-20 10:46:07,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:46:07,060 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:46:07,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:46:07,061 INFO L229 MonitoredProcess]: Starting monitored process 265 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:46:07,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (265)] Waiting until timeout for monitored process [2022-11-20 10:46:07,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:46:07,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:46:07,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:46:07,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:46:07,750 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:46:07,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:46:08,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:46:08,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:46:09,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:46:09,013 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:46:09,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [929582815] [2022-11-20 10:46:09,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [929582815] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:46:09,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:46:09,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 10:46:09,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718813544] [2022-11-20 10:46:09,014 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:46:09,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:46:09,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:46:09,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:46:09,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:46:09,015 INFO L87 Difference]: Start difference. First operand 11296 states and 56829 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:46:11,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:46:11,465 INFO L93 Difference]: Finished difference Result 11474 states and 57305 transitions. [2022-11-20 10:46:11,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 10:46:11,466 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 10:46:11,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:46:11,504 INFO L225 Difference]: With dead ends: 11474 [2022-11-20 10:46:11,504 INFO L226 Difference]: Without dead ends: 11474 [2022-11-20 10:46:11,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:46:11,504 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 129 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:46:11,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 73 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 302 Invalid, 0 Unknown, 71 Unchecked, 1.9s Time] [2022-11-20 10:46:11,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11474 states. [2022-11-20 10:46:11,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11474 to 11318. [2022-11-20 10:46:11,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11318 states, 11313 states have (on average 5.030407495801291) internal successors, (56909), 11317 states have internal predecessors, (56909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:46:11,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11318 states to 11318 states and 56909 transitions. [2022-11-20 10:46:11,777 INFO L78 Accepts]: Start accepts. Automaton has 11318 states and 56909 transitions. Word has length 15 [2022-11-20 10:46:11,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:46:11,777 INFO L495 AbstractCegarLoop]: Abstraction has 11318 states and 56909 transitions. [2022-11-20 10:46:11,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:46:11,777 INFO L276 IsEmpty]: Start isEmpty. Operand 11318 states and 56909 transitions. [2022-11-20 10:46:11,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:46:11,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:46:11,782 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:46:11,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (265)] Forceful destruction successful, exit code 0 [2022-11-20 10:46:11,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:46:11,983 INFO L420 AbstractCegarLoop]: === Iteration 265 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:46:11,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:46:11,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1052320548, now seen corresponding path program 10 times [2022-11-20 10:46:11,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 10:46:11,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1230191089] [2022-11-20 10:46:11,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:46:11,984 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 10:46:11,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 10:46:11,985 INFO L229 MonitoredProcess]: Starting monitored process 266 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 10:46:11,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d768822-60eb-4387-9ecb-a6ce0e6ad13e/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (266)] Waiting until timeout for monitored process [2022-11-20 10:46:12,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:46:12,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:46:12,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 10:46:12,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:46:12,659 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 10:46:12,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 10:46:13,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:46:13,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:46:14,713 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:46:14,713 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 10:46:14,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1230191089] [2022-11-20 10:46:14,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1230191089] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:46:14,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:46:14,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 10:46:14,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30090087] [2022-11-20 10:46:14,714 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:46:14,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 10:46:14,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 10:46:14,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 10:46:14,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:46:14,715 INFO L87 Difference]: Start difference. First operand 11318 states and 56909 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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)