./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/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_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/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_a4edff9d-17c4-4a6b-902b-a26a8216c974/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 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f --- 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 11:10:38,916 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:10:38,919 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:10:38,961 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:10:38,961 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:10:38,965 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:10:38,967 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:10:38,970 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:10:38,972 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:10:38,977 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:10:38,979 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:10:38,981 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:10:38,982 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:10:38,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:10:38,985 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:10:38,987 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:10:38,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:10:38,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:10:38,991 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:10:38,997 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:10:38,998 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:10:39,000 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:10:39,002 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:10:39,003 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:10:39,013 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:10:39,013 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:10:39,014 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:10:39,016 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:10:39,016 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:10:39,018 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:10:39,019 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:10:39,019 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:10:39,021 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:10:39,023 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:10:39,024 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:10:39,024 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:10:39,025 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:10:39,025 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:10:39,025 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:10:39,027 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:10:39,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:10:39,028 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-20 11:10:39,101 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:10:39,102 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:10:39,103 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:10:39,103 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:10:39,104 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:10:39,104 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:10:39,104 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:10:39,105 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:10:39,105 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:10:39,105 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:10:39,106 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:10:39,106 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 11:10:39,107 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:10:39,107 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:10:39,107 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:10:39,107 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 11:10:39,107 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 11:10:39,107 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 11:10:39,108 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:10:39,108 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 11:10:39,108 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:10:39,108 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:10:39,108 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:10:39,109 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:10:39,109 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:10:39,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:10:39,109 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:10:39,109 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:10:39,109 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:10:39,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:10:39,110 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_a4edff9d-17c4-4a6b-902b-a26a8216c974/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f [2022-11-20 11:10:39,436 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:10:39,467 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:10:39,470 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:10:39,472 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:10:39,473 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:10:39,474 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2022-11-20 11:10:42,541 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:10:42,720 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:10:42,721 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2022-11-20 11:10:42,729 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/data/4338ff7d2/004b1f082922480184500a1cd739ea20/FLAGbb39ae977 [2022-11-20 11:10:42,749 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/data/4338ff7d2/004b1f082922480184500a1cd739ea20 [2022-11-20 11:10:42,751 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:10:42,753 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:10:42,757 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:10:42,757 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:10:42,761 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:10:42,761 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:10:42" (1/1) ... [2022-11-20 11:10:42,763 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@390a8c02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:42, skipping insertion in model container [2022-11-20 11:10:42,763 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:10:42" (1/1) ... [2022-11-20 11:10:42,771 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:10:42,798 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:10:43,046 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_a4edff9d-17c4-4a6b-902b-a26a8216c974/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2022-11-20 11:10:43,061 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:10:43,073 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 11:10:43,075 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5654bd7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:43, skipping insertion in model container [2022-11-20 11:10:43,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:10:43,076 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-20 11:10:43,079 INFO L158 Benchmark]: Toolchain (without parser) took 324.04ms. Allocated memory is still 136.3MB. Free memory was 95.4MB in the beginning and 85.4MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-20 11:10:43,079 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 136.3MB. Free memory is still 102.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 11:10:43,080 INFO L158 Benchmark]: CACSL2BoogieTranslator took 319.62ms. Allocated memory is still 136.3MB. Free memory was 95.4MB in the beginning and 85.4MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-20 11:10:43,082 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 136.3MB. Free memory is still 102.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 319.62ms. Allocated memory is still 136.3MB. Free memory was 95.4MB in the beginning and 85.4MB in the end (delta: 10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 100]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/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_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/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_a4edff9d-17c4-4a6b-902b-a26a8216c974/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 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f --- 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 11:10:45,326 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:10:45,328 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:10:45,368 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:10:45,369 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:10:45,370 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:10:45,372 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:10:45,374 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:10:45,376 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:10:45,377 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:10:45,378 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:10:45,379 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:10:45,380 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:10:45,381 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:10:45,382 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:10:45,383 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:10:45,384 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:10:45,385 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:10:45,387 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:10:45,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:10:45,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:10:45,392 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:10:45,394 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:10:45,395 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:10:45,399 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:10:45,399 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:10:45,400 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:10:45,401 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:10:45,401 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:10:45,403 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:10:45,403 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:10:45,404 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:10:45,405 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:10:45,406 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:10:45,407 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:10:45,407 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:10:45,408 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:10:45,409 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:10:45,409 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:10:45,410 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:10:45,411 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:10:45,412 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-20 11:10:45,434 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:10:45,435 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:10:45,435 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:10:45,435 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:10:45,436 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:10:45,436 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:10:45,437 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:10:45,438 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:10:45,438 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:10:45,438 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:10:45,439 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:10:45,439 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 11:10:45,439 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:10:45,440 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:10:45,440 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:10:45,440 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 11:10:45,441 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 11:10:45,441 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 11:10:45,441 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:10:45,442 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 11:10:45,442 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 11:10:45,442 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 11:10:45,443 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:10:45,443 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:10:45,443 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:10:45,444 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:10:45,444 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:10:45,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:10:45,445 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:10:45,445 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:10:45,445 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-20 11:10:45,446 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 11:10:45,446 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 11:10:45,446 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_a4edff9d-17c4-4a6b-902b-a26a8216c974/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f [2022-11-20 11:10:45,845 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:10:45,866 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:10:45,869 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:10:45,870 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:10:45,871 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:10:45,872 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2022-11-20 11:10:48,845 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:10:49,051 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:10:49,052 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2022-11-20 11:10:49,066 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/data/231536465/3343f2e7f35543408b734860da63256e/FLAGa0efea38a [2022-11-20 11:10:49,094 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/data/231536465/3343f2e7f35543408b734860da63256e [2022-11-20 11:10:49,100 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:10:49,102 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:10:49,106 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:10:49,107 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:10:49,110 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:10:49,112 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:10:49" (1/1) ... [2022-11-20 11:10:49,113 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46ef00b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:49, skipping insertion in model container [2022-11-20 11:10:49,113 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:10:49" (1/1) ... [2022-11-20 11:10:49,120 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:10:49,147 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:10:49,363 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_a4edff9d-17c4-4a6b-902b-a26a8216c974/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2022-11-20 11:10:49,399 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:10:49,423 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-20 11:10:49,426 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:10:49,460 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_a4edff9d-17c4-4a6b-902b-a26a8216c974/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2022-11-20 11:10:49,478 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:10:49,489 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:10:49,527 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_a4edff9d-17c4-4a6b-902b-a26a8216c974/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2022-11-20 11:10:49,538 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:10:49,561 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:10:49,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:49 WrapperNode [2022-11-20 11:10:49,561 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:10:49,563 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:10:49,563 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:10:49,563 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:10:49,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:49" (1/1) ... [2022-11-20 11:10:49,583 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:49" (1/1) ... [2022-11-20 11:10:49,616 INFO L138 Inliner]: procedures = 28, calls = 45, calls flagged for inlining = 15, calls inlined = 27, statements flattened = 262 [2022-11-20 11:10:49,616 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:10:49,617 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:10:49,617 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:10:49,617 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:10:49,631 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:49" (1/1) ... [2022-11-20 11:10:49,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:49" (1/1) ... [2022-11-20 11:10:49,636 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:49" (1/1) ... [2022-11-20 11:10:49,637 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:49" (1/1) ... [2022-11-20 11:10:49,648 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:49" (1/1) ... [2022-11-20 11:10:49,654 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:49" (1/1) ... [2022-11-20 11:10:49,656 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:49" (1/1) ... [2022-11-20 11:10:49,658 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:49" (1/1) ... [2022-11-20 11:10:49,662 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:10:49,663 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:10:49,663 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:10:49,663 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:10:49,664 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:49" (1/1) ... [2022-11-20 11:10:49,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:10:49,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:10:49,708 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:10:49,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:10:49,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:10:49,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-20 11:10:49,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:10:49,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-20 11:10:49,767 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 11:10:49,767 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 11:10:49,767 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 11:10:49,767 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 11:10:49,768 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-20 11:10:49,768 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-20 11:10:49,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 11:10:49,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:10:49,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:10:49,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:10:49,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-20 11:10:49,771 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 11:10:49,985 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:10:49,987 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:10:50,861 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:10:50,872 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:10:50,872 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-20 11:10:50,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:10:50 BoogieIcfgContainer [2022-11-20 11:10:50,875 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:10:50,877 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:10:50,877 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:10:50,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:10:50,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:10:49" (1/3) ... [2022-11-20 11:10:50,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@244e8a86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:10:50, skipping insertion in model container [2022-11-20 11:10:50,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:10:49" (2/3) ... [2022-11-20 11:10:50,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@244e8a86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:10:50, skipping insertion in model container [2022-11-20 11:10:50,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:10:50" (3/3) ... [2022-11-20 11:10:50,886 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-three-array-sum-alt.wvr.c [2022-11-20 11:10:50,906 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:10:50,906 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2022-11-20 11:10:50,906 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 11:10:51,116 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-20 11:10:51,177 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 11:10:51,201 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 374 places, 393 transitions, 810 flow [2022-11-20 11:10:51,204 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 374 places, 393 transitions, 810 flow [2022-11-20 11:10:51,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 374 places, 393 transitions, 810 flow [2022-11-20 11:10:51,369 INFO L130 PetriNetUnfolder]: 29/390 cut-off events. [2022-11-20 11:10:51,369 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-20 11:10:51,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 390 events. 29/390 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 654 event pairs, 0 based on Foata normal form. 0/329 useless extension candidates. Maximal degree in co-relation 250. Up to 2 conditions per place. [2022-11-20 11:10:51,392 INFO L119 LiptonReduction]: Number of co-enabled transitions 20950 [2022-11-20 11:11:55,891 INFO L134 LiptonReduction]: Checked pairs total: 21781 [2022-11-20 11:11:55,891 INFO L136 LiptonReduction]: Total number of compositions: 466 [2022-11-20 11:11:55,898 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 67 places, 63 transitions, 150 flow [2022-11-20 11:11:56,010 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1500 states, 1152 states have (on average 4.541666666666667) internal successors, (5232), 1499 states have internal predecessors, (5232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:11:56,028 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:11:56,034 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;@29e05457, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:11:56,035 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2022-11-20 11:11:56,041 INFO L276 IsEmpty]: Start isEmpty. Operand has 1500 states, 1152 states have (on average 4.541666666666667) internal successors, (5232), 1499 states have internal predecessors, (5232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:11:56,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 11:11:56,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:11:56,046 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 11:11:56,047 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:11:56,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:56,052 INFO L85 PathProgramCache]: Analyzing trace with hash 49928, now seen corresponding path program 1 times [2022-11-20 11:11:56,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:11:56,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1746607178] [2022-11-20 11:11:56,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:56,065 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:11:56,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:11:56,071 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:11:56,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:11:56,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:56,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 11:11:56,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:11:56,444 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 11:11:56,445 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 15 treesize of output 50 [2022-11-20 11:11:56,481 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 11:11:56,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:11:56,482 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:11:56,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1746607178] [2022-11-20 11:11:56,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1746607178] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:11:56,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:11:56,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:11:56,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440394070] [2022-11-20 11:11:56,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:11:56,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:11:56,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:11:56,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:11:56,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:11:56,524 INFO L87 Difference]: Start difference. First operand has 1500 states, 1152 states have (on average 4.541666666666667) internal successors, (5232), 1499 states have internal predecessors, (5232), 0 states have call successors, (0), 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 11:11:56,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:11:56,906 INFO L93 Difference]: Finished difference Result 1248 states and 4342 transitions. [2022-11-20 11:11:56,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:11:56,909 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 11:11:56,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:11:56,944 INFO L225 Difference]: With dead ends: 1248 [2022-11-20 11:11:56,945 INFO L226 Difference]: Without dead ends: 1248 [2022-11-20 11:11:56,946 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 11:11:56,950 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 50 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:11:56,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 3 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:11:56,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2022-11-20 11:11:57,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1248. [2022-11-20 11:11:57,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 974 states have (on average 4.457905544147844) internal successors, (4342), 1247 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:11:57,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 4342 transitions. [2022-11-20 11:11:57,193 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 4342 transitions. Word has length 2 [2022-11-20 11:11:57,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:11:57,193 INFO L495 AbstractCegarLoop]: Abstraction has 1248 states and 4342 transitions. [2022-11-20 11:11:57,193 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 11:11:57,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 4342 transitions. [2022-11-20 11:11:57,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 11:11:57,194 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:11:57,194 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 11:11:57,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-20 11:11:57,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:11:57,397 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:11:57,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:57,398 INFO L85 PathProgramCache]: Analyzing trace with hash 49929, now seen corresponding path program 1 times [2022-11-20 11:11:57,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:11:57,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1524938003] [2022-11-20 11:11:57,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:57,399 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:11:57,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:11:57,400 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:11:57,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:11:57,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:57,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 11:11:57,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:11:57,694 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:11:57,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:11:57,733 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 11:11:57,733 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:11:57,733 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:11:57,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1524938003] [2022-11-20 11:11:57,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1524938003] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:11:57,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:11:57,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:11:57,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50379269] [2022-11-20 11:11:57,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:11:57,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:11:57,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:11:57,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:11:57,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:11:57,736 INFO L87 Difference]: Start difference. First operand 1248 states and 4342 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 11:11:58,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:11:58,476 INFO L93 Difference]: Finished difference Result 2492 states and 8680 transitions. [2022-11-20 11:11:58,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:11:58,478 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 11:11:58,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:11:58,497 INFO L225 Difference]: With dead ends: 2492 [2022-11-20 11:11:58,497 INFO L226 Difference]: Without dead ends: 2492 [2022-11-20 11:11:58,498 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 11:11:58,499 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 44 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:11:58,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 6 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 11:11:58,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2492 states. [2022-11-20 11:11:58,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2492 to 1251. [2022-11-20 11:11:58,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 977 states have (on average 4.452405322415558) internal successors, (4350), 1250 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:11:58,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 4350 transitions. [2022-11-20 11:11:58,581 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 4350 transitions. Word has length 2 [2022-11-20 11:11:58,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:11:58,582 INFO L495 AbstractCegarLoop]: Abstraction has 1251 states and 4350 transitions. [2022-11-20 11:11:58,582 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 11:11:58,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 4350 transitions. [2022-11-20 11:11:58,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 11:11:58,583 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:11:58,583 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 11:11:58,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:11:58,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:11:58,795 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:11:58,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:58,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1554452, now seen corresponding path program 1 times [2022-11-20 11:11:58,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:11:58,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1866280485] [2022-11-20 11:11:58,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:58,797 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:11:58,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:11:58,798 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:11:58,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:11:58,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:58,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 11:11:58,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:11:59,032 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:11:59,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:11:59,118 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 11:11:59,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:11:59,387 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 11:11:59,387 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:11:59,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1866280485] [2022-11-20 11:11:59,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1866280485] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:11:59,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:11:59,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-20 11:11:59,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607237796] [2022-11-20 11:11:59,388 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:11:59,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:11:59,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:11:59,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:11:59,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:11:59,389 INFO L87 Difference]: Start difference. First operand 1251 states and 4350 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 11:12:01,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:12:03,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:12:04,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:12:04,276 INFO L93 Difference]: Finished difference Result 3742 states and 13034 transitions. [2022-11-20 11:12:04,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:12:04,278 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 11:12:04,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:12:04,317 INFO L225 Difference]: With dead ends: 3742 [2022-11-20 11:12:04,317 INFO L226 Difference]: Without dead ends: 3742 [2022-11-20 11:12:04,317 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 11:12:04,337 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 179 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:12:04,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 12 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-20 11:12:04,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3742 states. [2022-11-20 11:12:04,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3742 to 1260. [2022-11-20 11:12:04,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1260 states, 986 states have (on average 4.436105476673428) internal successors, (4374), 1259 states have internal predecessors, (4374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:04,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 4374 transitions. [2022-11-20 11:12:04,467 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 4374 transitions. Word has length 3 [2022-11-20 11:12:04,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:12:04,468 INFO L495 AbstractCegarLoop]: Abstraction has 1260 states and 4374 transitions. [2022-11-20 11:12:04,468 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 11:12:04,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 4374 transitions. [2022-11-20 11:12:04,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 11:12:04,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:12:04,469 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 11:12:04,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:12:04,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:12:04,682 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:12:04,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:04,683 INFO L85 PathProgramCache]: Analyzing trace with hash 48295142, now seen corresponding path program 1 times [2022-11-20 11:12:04,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:12:04,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2061773726] [2022-11-20 11:12:04,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:04,684 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:12:04,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:12:04,685 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:12:04,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:12:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:04,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:12:04,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:04,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:04,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:04,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:04,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:04,992 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-20 11:12:04,993 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 11:12:05,035 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-20 11:12:05,035 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 11:12:05,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:05,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:12:05,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:05,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:12:05,196 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 11:12:05,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:12:05,197 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:12:05,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2061773726] [2022-11-20 11:12:05,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2061773726] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:05,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:12:05,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:12:05,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195481154] [2022-11-20 11:12:05,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:05,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:12:05,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:12:05,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:12:05,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:12:05,199 INFO L87 Difference]: Start difference. First operand 1260 states and 4374 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:05,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:12:05,623 INFO L93 Difference]: Finished difference Result 1034 states and 3469 transitions. [2022-11-20 11:12:05,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:12:05,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-20 11:12:05,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:12:05,632 INFO L225 Difference]: With dead ends: 1034 [2022-11-20 11:12:05,633 INFO L226 Difference]: Without dead ends: 1034 [2022-11-20 11:12:05,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:12:05,634 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 96 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:12:05,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 3 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 2 Unchecked, 0.4s Time] [2022-11-20 11:12:05,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2022-11-20 11:12:05,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 1034. [2022-11-20 11:12:05,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 824 states have (on average 4.209951456310679) internal successors, (3469), 1033 states have internal predecessors, (3469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:05,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 3469 transitions. [2022-11-20 11:12:05,720 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 3469 transitions. Word has length 4 [2022-11-20 11:12:05,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:12:05,720 INFO L495 AbstractCegarLoop]: Abstraction has 1034 states and 3469 transitions. [2022-11-20 11:12:05,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:05,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 3469 transitions. [2022-11-20 11:12:05,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 11:12:05,722 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:12:05,722 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 11:12:05,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:12:05,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:12:05,939 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:12:05,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:05,939 INFO L85 PathProgramCache]: Analyzing trace with hash 48295143, now seen corresponding path program 1 times [2022-11-20 11:12:05,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:12:05,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [597024633] [2022-11-20 11:12:05,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:05,940 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:12:05,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:12:05,941 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:12:05,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:12:06,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:06,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:12:06,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:06,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:06,214 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-20 11:12:06,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-11-20 11:12:06,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:06,642 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:12:06,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2022-11-20 11:12:07,040 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-11-20 11:12:07,040 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 3 case distinctions, treesize of input 55 treesize of output 80 [2022-11-20 11:12:09,501 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 11:12:09,501 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:12:09,502 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:12:09,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [597024633] [2022-11-20 11:12:09,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [597024633] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:09,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:12:09,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:12:09,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981036971] [2022-11-20 11:12:09,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:09,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:12:09,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:12:09,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:12:09,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2022-11-20 11:12:09,503 INFO L87 Difference]: Start difference. First operand 1034 states and 3469 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 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 11:12:09,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:12:09,767 INFO L93 Difference]: Finished difference Result 1036 states and 3473 transitions. [2022-11-20 11:12:09,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:12:09,769 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 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 11:12:09,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:12:09,776 INFO L225 Difference]: With dead ends: 1036 [2022-11-20 11:12:09,776 INFO L226 Difference]: Without dead ends: 1036 [2022-11-20 11:12:09,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2022-11-20 11:12:09,777 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:12:09,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 48 Unchecked, 0.3s Time] [2022-11-20 11:12:09,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2022-11-20 11:12:09,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 1036. [2022-11-20 11:12:09,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 826 states have (on average 4.204600484261501) internal successors, (3473), 1035 states have internal predecessors, (3473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:09,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 3473 transitions. [2022-11-20 11:12:09,811 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 3473 transitions. Word has length 4 [2022-11-20 11:12:09,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:12:09,811 INFO L495 AbstractCegarLoop]: Abstraction has 1036 states and 3473 transitions. [2022-11-20 11:12:09,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 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 11:12:09,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 3473 transitions. [2022-11-20 11:12:09,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 11:12:09,812 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:12:09,812 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 11:12:09,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:12:10,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:12:10,024 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:12:10,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:10,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1494141746, now seen corresponding path program 1 times [2022-11-20 11:12:10,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:12:10,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1738577934] [2022-11-20 11:12:10,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:10,025 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:12:10,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:12:10,027 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:12:10,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:12:10,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:10,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 11:12:10,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:10,214 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 11:12:10,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:12:10,305 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 11:12:10,305 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:12:10,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1738577934] [2022-11-20 11:12:10,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1738577934] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:12:10,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:12:10,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-20 11:12:10,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281723543] [2022-11-20 11:12:10,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:12:10,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:12:10,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:12:10,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:12:10,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:12:10,307 INFO L87 Difference]: Start difference. First operand 1036 states and 3473 transitions. Second operand has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 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 11:12:11,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:12:11,853 INFO L93 Difference]: Finished difference Result 4085 states and 13767 transitions. [2022-11-20 11:12:11,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:12:11,856 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 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 5 [2022-11-20 11:12:11,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:12:11,884 INFO L225 Difference]: With dead ends: 4085 [2022-11-20 11:12:11,884 INFO L226 Difference]: Without dead ends: 4085 [2022-11-20 11:12:11,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:12:11,885 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 252 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:12:11,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 18 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-20 11:12:11,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4085 states. [2022-11-20 11:12:11,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4085 to 1038. [2022-11-20 11:12:11,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 828 states have (on average 4.196859903381642) internal successors, (3475), 1037 states have internal predecessors, (3475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:11,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 3475 transitions. [2022-11-20 11:12:11,962 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 3475 transitions. Word has length 5 [2022-11-20 11:12:11,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:12:11,962 INFO L495 AbstractCegarLoop]: Abstraction has 1038 states and 3475 transitions. [2022-11-20 11:12:11,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 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 11:12:11,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 3475 transitions. [2022-11-20 11:12:11,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 11:12:11,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:12:11,964 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 11:12:11,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:12:12,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:12:12,176 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:12:12,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:12,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1497148963, now seen corresponding path program 1 times [2022-11-20 11:12:12,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:12:12,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [122493014] [2022-11-20 11:12:12,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:12,177 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:12:12,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:12:12,178 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:12:12,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:12:12,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:12,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:12:12,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:12,355 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 11:12:12,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:12:12,356 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:12:12,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [122493014] [2022-11-20 11:12:12,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [122493014] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:12,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:12:12,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:12:12,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687742884] [2022-11-20 11:12:12,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:12,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:12:12,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:12:12,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:12:12,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:12:12,358 INFO L87 Difference]: Start difference. First operand 1038 states and 3475 transitions. Second operand has 5 states, 5 states have (on average 1.0) 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 11:12:13,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:12:13,107 INFO L93 Difference]: Finished difference Result 2054 states and 6905 transitions. [2022-11-20 11:12:13,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:12:13,109 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.0) 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 11:12:13,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:12:13,123 INFO L225 Difference]: With dead ends: 2054 [2022-11-20 11:12:13,123 INFO L226 Difference]: Without dead ends: 2054 [2022-11-20 11:12:13,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 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 11:12:13,124 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 129 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:12:13,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 12 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 11:12:13,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2054 states. [2022-11-20 11:12:13,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2054 to 1039. [2022-11-20 11:12:13,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1039 states, 829 states have (on average 4.191797346200241) internal successors, (3475), 1038 states have internal predecessors, (3475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:13,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 3475 transitions. [2022-11-20 11:12:13,188 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 3475 transitions. Word has length 5 [2022-11-20 11:12:13,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:12:13,188 INFO L495 AbstractCegarLoop]: Abstraction has 1039 states and 3475 transitions. [2022-11-20 11:12:13,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.0) 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 11:12:13,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 3475 transitions. [2022-11-20 11:12:13,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 11:12:13,189 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:12:13,189 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-20 11:12:13,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-20 11:12:13,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:12:13,401 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:12:13,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:13,401 INFO L85 PathProgramCache]: Analyzing trace with hash -929354295, now seen corresponding path program 2 times [2022-11-20 11:12:13,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:12:13,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [650567242] [2022-11-20 11:12:13,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:12:13,402 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:12:13,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:12:13,403 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:12:13,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:12:13,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:12:13,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:12:13,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 11:12:13,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:13,663 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:12:13,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:12:13,864 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 11:12:13,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:12:14,563 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 11:12:14,563 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:12:14,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [650567242] [2022-11-20 11:12:14,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [650567242] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:12:14,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:12:14,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 11:12:14,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55285803] [2022-11-20 11:12:14,564 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:12:14,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:12:14,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:12:14,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:12:14,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:12:14,565 INFO L87 Difference]: Start difference. First operand 1039 states and 3475 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 11:12:18,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:12:20,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:12:22,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:12:24,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:12:26,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:12:28,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:12:30,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:12:32,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:12:34,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:12:36,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:12:38,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:12:43,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:12:43,416 INFO L93 Difference]: Finished difference Result 7146 states and 24088 transitions. [2022-11-20 11:12:43,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 11:12:43,418 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 11:12:43,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:12:43,454 INFO L225 Difference]: With dead ends: 7146 [2022-11-20 11:12:43,454 INFO L226 Difference]: Without dead ends: 7146 [2022-11-20 11:12:43,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:12:43,455 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1094 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 191 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1094 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:12:43,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1094 Valid, 87 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1309 Invalid, 7 Unknown, 0 Unchecked, 27.4s Time] [2022-11-20 11:12:43,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7146 states. [2022-11-20 11:12:43,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7146 to 1053. [2022-11-20 11:12:43,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 843 states have (on average 4.161328588374852) internal successors, (3508), 1052 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:43,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 3508 transitions. [2022-11-20 11:12:43,596 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 3508 transitions. Word has length 6 [2022-11-20 11:12:43,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:12:43,597 INFO L495 AbstractCegarLoop]: Abstraction has 1053 states and 3508 transitions. [2022-11-20 11:12:43,597 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 11:12:43,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 3508 transitions. [2022-11-20 11:12:43,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 11:12:43,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:12:43,598 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 11:12:43,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:12:43,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:12:43,803 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:12:43,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:43,804 INFO L85 PathProgramCache]: Analyzing trace with hash -832972211, now seen corresponding path program 1 times [2022-11-20 11:12:43,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:12:43,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1728139787] [2022-11-20 11:12:43,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:43,804 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:12:43,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:12:43,805 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:12:43,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:12:43,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:43,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:12:43,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:43,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:44,061 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-20 11:12:44,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2022-11-20 11:12:44,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:44,331 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-20 11:12:44,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2022-11-20 11:12:44,563 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-20 11:12:44,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-20 11:12:44,715 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 11:12:44,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:12:44,715 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:12:44,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1728139787] [2022-11-20 11:12:44,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1728139787] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:44,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:12:44,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:12:44,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714792124] [2022-11-20 11:12:44,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:44,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:12:44,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:12:44,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:12:44,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:12:44,717 INFO L87 Difference]: Start difference. First operand 1053 states and 3508 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:44,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:12:44,934 INFO L93 Difference]: Finished difference Result 1056 states and 3518 transitions. [2022-11-20 11:12:44,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:12:44,935 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 11:12:44,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:12:44,940 INFO L225 Difference]: With dead ends: 1056 [2022-11-20 11:12:44,941 INFO L226 Difference]: Without dead ends: 1056 [2022-11-20 11:12:44,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:12:44,941 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 7 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 11:12:44,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 7 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-11-20 11:12:44,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2022-11-20 11:12:44,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 1056. [2022-11-20 11:12:44,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 846 states have (on average 4.15839243498818) internal successors, (3518), 1055 states have internal predecessors, (3518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:44,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 3518 transitions. [2022-11-20 11:12:45,000 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 3518 transitions. Word has length 6 [2022-11-20 11:12:45,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:12:45,000 INFO L495 AbstractCegarLoop]: Abstraction has 1056 states and 3518 transitions. [2022-11-20 11:12:45,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:45,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 3518 transitions. [2022-11-20 11:12:45,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 11:12:45,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:12:45,002 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 11:12:45,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:12:45,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:12:45,214 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:12:45,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:45,214 INFO L85 PathProgramCache]: Analyzing trace with hash -832972210, now seen corresponding path program 1 times [2022-11-20 11:12:45,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:12:45,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [52512796] [2022-11-20 11:12:45,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:45,215 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:12:45,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:12:45,216 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:12:45,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:12:45,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:45,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:12:45,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:45,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:45,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:45,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:45,470 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-20 11:12:45,470 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 11:12:45,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-20 11:12:45,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:45,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:12:45,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:45,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:12:45,680 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 11:12:45,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:12:45,680 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:12:45,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [52512796] [2022-11-20 11:12:45,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [52512796] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:45,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:12:45,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:12:45,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569992054] [2022-11-20 11:12:45,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:45,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:12:45,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:12:45,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:12:45,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:12:45,682 INFO L87 Difference]: Start difference. First operand 1056 states and 3518 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:46,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:12:46,007 INFO L93 Difference]: Finished difference Result 1006 states and 3371 transitions. [2022-11-20 11:12:46,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:12:46,009 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 11:12:46,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:12:46,014 INFO L225 Difference]: With dead ends: 1006 [2022-11-20 11:12:46,014 INFO L226 Difference]: Without dead ends: 1006 [2022-11-20 11:12:46,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:12:46,016 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 90 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:12:46,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 3 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 2 Unchecked, 0.3s Time] [2022-11-20 11:12:46,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2022-11-20 11:12:46,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 1006. [2022-11-20 11:12:46,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 820 states have (on average 4.110975609756098) internal successors, (3371), 1005 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 11:12:46,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 3371 transitions. [2022-11-20 11:12:46,049 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 3371 transitions. Word has length 6 [2022-11-20 11:12:46,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:12:46,049 INFO L495 AbstractCegarLoop]: Abstraction has 1006 states and 3371 transitions. [2022-11-20 11:12:46,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:46,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 3371 transitions. [2022-11-20 11:12:46,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 11:12:46,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:12:46,050 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:12:46,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:12:46,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:12:46,262 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:12:46,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:46,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1348407333, now seen corresponding path program 1 times [2022-11-20 11:12:46,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:12:46,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1992783496] [2022-11-20 11:12:46,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:46,263 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:12:46,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:12:46,265 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:12:46,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:12:46,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:46,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:12:46,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:46,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:46,572 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-20 11:12:46,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-11-20 11:12:46,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:46,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 11:12:46,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:46,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 11:12:46,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:12:46,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:12:46,752 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:12:46,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1992783496] [2022-11-20 11:12:46,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1992783496] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:46,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:12:46,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:12:46,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91316447] [2022-11-20 11:12:46,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:46,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:12:46,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:12:46,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:12:46,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:12:46,754 INFO L87 Difference]: Start difference. First operand 1006 states and 3371 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:47,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:12:47,130 INFO L93 Difference]: Finished difference Result 1005 states and 3363 transitions. [2022-11-20 11:12:47,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:12:47,131 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 11:12:47,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:12:47,136 INFO L225 Difference]: With dead ends: 1005 [2022-11-20 11:12:47,136 INFO L226 Difference]: Without dead ends: 1005 [2022-11-20 11:12:47,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:12:47,137 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:12:47,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 9 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 44 Unchecked, 0.3s Time] [2022-11-20 11:12:47,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2022-11-20 11:12:47,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 1005. [2022-11-20 11:12:47,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 820 states have (on average 4.101219512195122) internal successors, (3363), 1004 states have internal predecessors, (3363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:47,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 3363 transitions. [2022-11-20 11:12:47,165 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 3363 transitions. Word has length 7 [2022-11-20 11:12:47,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:12:47,165 INFO L495 AbstractCegarLoop]: Abstraction has 1005 states and 3363 transitions. [2022-11-20 11:12:47,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:47,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 3363 transitions. [2022-11-20 11:12:47,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 11:12:47,166 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:12:47,166 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:12:47,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:12:47,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:12:47,378 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:12:47,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:47,379 INFO L85 PathProgramCache]: Analyzing trace with hash -52349683, now seen corresponding path program 1 times [2022-11-20 11:12:47,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:12:47,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1700575351] [2022-11-20 11:12:47,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:47,379 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:12:47,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:12:47,380 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:12:47,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:12:47,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:47,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 11:12:47,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:47,549 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 11:12:47,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:12:47,549 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:12:47,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1700575351] [2022-11-20 11:12:47,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1700575351] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:47,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:12:47,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:12:47,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548356647] [2022-11-20 11:12:47,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:47,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:12:47,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:12:47,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:12:47,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:12:47,551 INFO L87 Difference]: Start difference. First operand 1005 states and 3363 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 11:12:48,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:12:48,535 INFO L93 Difference]: Finished difference Result 1653 states and 5365 transitions. [2022-11-20 11:12:48,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:12:48,537 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 11:12:48,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:12:48,542 INFO L225 Difference]: With dead ends: 1653 [2022-11-20 11:12:48,542 INFO L226 Difference]: Without dead ends: 1653 [2022-11-20 11:12:48,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 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 11:12:48,543 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 95 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:12:48,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 13 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 11:12:48,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2022-11-20 11:12:48,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 1322. [2022-11-20 11:12:48,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 1137 states have (on average 3.9428320140721196) internal successors, (4483), 1321 states have internal predecessors, (4483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:48,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 4483 transitions. [2022-11-20 11:12:48,595 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 4483 transitions. Word has length 7 [2022-11-20 11:12:48,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:12:48,595 INFO L495 AbstractCegarLoop]: Abstraction has 1322 states and 4483 transitions. [2022-11-20 11:12:48,595 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 11:12:48,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 4483 transitions. [2022-11-20 11:12:48,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 11:12:48,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:12:48,596 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:12:48,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:12:48,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:12:48,808 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:12:48,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:48,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1622830684, now seen corresponding path program 1 times [2022-11-20 11:12:48,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:12:48,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [274329939] [2022-11-20 11:12:48,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:48,809 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:12:48,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:12:48,809 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:12:48,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:12:48,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:48,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 11:12:48,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:48,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:49,061 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-20 11:12:49,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2022-11-20 11:12:49,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:49,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 11:12:49,231 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 11:12:49,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 11:12:49,304 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 11:12:49,304 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:12:49,304 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:12:49,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [274329939] [2022-11-20 11:12:49,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [274329939] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:49,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:12:49,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:12:49,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057702527] [2022-11-20 11:12:49,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:49,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:12:49,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:12:49,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:12:49,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:12:49,306 INFO L87 Difference]: Start difference. First operand 1322 states and 4483 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:49,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:12:49,604 INFO L93 Difference]: Finished difference Result 1270 states and 4334 transitions. [2022-11-20 11:12:49,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:12:49,605 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 11:12:49,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:12:49,609 INFO L225 Difference]: With dead ends: 1270 [2022-11-20 11:12:49,609 INFO L226 Difference]: Without dead ends: 1270 [2022-11-20 11:12:49,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:12:49,610 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 43 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:12:49,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 3 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 1 Unchecked, 0.3s Time] [2022-11-20 11:12:49,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1270 states. [2022-11-20 11:12:49,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1270 to 1266. [2022-11-20 11:12:49,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1105 states have (on average 3.9167420814479637) internal successors, (4328), 1265 states have internal predecessors, (4328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:49,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 4328 transitions. [2022-11-20 11:12:49,657 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 4328 transitions. Word has length 8 [2022-11-20 11:12:49,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:12:49,657 INFO L495 AbstractCegarLoop]: Abstraction has 1266 states and 4328 transitions. [2022-11-20 11:12:49,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:49,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 4328 transitions. [2022-11-20 11:12:49,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 11:12:49,658 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:12:49,658 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:12:49,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-11-20 11:12:49,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:12:49,870 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:12:49,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:49,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1622341199, now seen corresponding path program 1 times [2022-11-20 11:12:49,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:12:49,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [776825917] [2022-11-20 11:12:49,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:49,871 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:12:49,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:12:49,872 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:12:49,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:12:50,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:50,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:12:50,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:50,120 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 11:12:50,121 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 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 11:12:50,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:50,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 11:12:50,213 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 11:12:50,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 11:12:50,286 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 11:12:50,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:12:50,287 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:12:50,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [776825917] [2022-11-20 11:12:50,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [776825917] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:50,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:12:50,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:12:50,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733189420] [2022-11-20 11:12:50,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:50,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:12:50,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:12:50,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:12:50,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:12:50,290 INFO L87 Difference]: Start difference. First operand 1266 states and 4328 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:50,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:12:50,572 INFO L93 Difference]: Finished difference Result 1275 states and 4359 transitions. [2022-11-20 11:12:50,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:12:50,573 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 11:12:50,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:12:50,579 INFO L225 Difference]: With dead ends: 1275 [2022-11-20 11:12:50,579 INFO L226 Difference]: Without dead ends: 1275 [2022-11-20 11:12:50,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:12:50,580 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:12:50,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 9 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 42 Unchecked, 0.3s Time] [2022-11-20 11:12:50,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2022-11-20 11:12:50,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1275. [2022-11-20 11:12:50,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1275 states, 1114 states have (on average 3.9129263913824057) internal successors, (4359), 1274 states have internal predecessors, (4359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:50,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1275 states to 1275 states and 4359 transitions. [2022-11-20 11:12:50,629 INFO L78 Accepts]: Start accepts. Automaton has 1275 states and 4359 transitions. Word has length 8 [2022-11-20 11:12:50,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:12:50,630 INFO L495 AbstractCegarLoop]: Abstraction has 1275 states and 4359 transitions. [2022-11-20 11:12:50,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:50,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1275 states and 4359 transitions. [2022-11-20 11:12:50,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 11:12:50,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:12:50,631 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:12:50,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:12:50,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:12:50,848 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:12:50,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:50,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1622341198, now seen corresponding path program 1 times [2022-11-20 11:12:50,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:12:50,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [345556084] [2022-11-20 11:12:50,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:50,849 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:12:50,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:12:50,850 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:12:50,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:12:51,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:51,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:12:51,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:51,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:51,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:51,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:51,120 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-20 11:12:51,120 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 11:12:51,131 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 11:12:51,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:51,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:12:51,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:51,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:12:51,304 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 11:12:51,304 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:12:51,304 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:12:51,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [345556084] [2022-11-20 11:12:51,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [345556084] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:51,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:12:51,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:12:51,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327121957] [2022-11-20 11:12:51,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:51,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:12:51,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:12:51,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:12:51,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:12:51,306 INFO L87 Difference]: Start difference. First operand 1275 states and 4359 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 11:12:51,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:12:51,688 INFO L93 Difference]: Finished difference Result 1231 states and 4232 transitions. [2022-11-20 11:12:51,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:12:51,689 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 11:12:51,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:12:51,695 INFO L225 Difference]: With dead ends: 1231 [2022-11-20 11:12:51,696 INFO L226 Difference]: Without dead ends: 1231 [2022-11-20 11:12:51,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:12:51,698 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 41 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:12:51,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 3 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 1 Unchecked, 0.4s Time] [2022-11-20 11:12:51,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2022-11-20 11:12:51,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 1231. [2022-11-20 11:12:51,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1086 states have (on average 3.896869244935543) internal successors, (4232), 1230 states have internal predecessors, (4232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:51,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 4232 transitions. [2022-11-20 11:12:51,734 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 4232 transitions. Word has length 8 [2022-11-20 11:12:51,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:12:51,735 INFO L495 AbstractCegarLoop]: Abstraction has 1231 states and 4232 transitions. [2022-11-20 11:12:51,735 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 11:12:51,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 4232 transitions. [2022-11-20 11:12:51,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 11:12:51,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:12:51,738 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:12:51,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-20 11:12:51,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:12:51,950 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:12:51,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:51,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1247016924, now seen corresponding path program 1 times [2022-11-20 11:12:51,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:12:51,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1260938747] [2022-11-20 11:12:51,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:51,951 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 11:12:51,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:12:51,953 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:12:51,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:12:52,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:52,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 11:12:52,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:52,195 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 11:12:52,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:12:52,195 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:12:52,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1260938747] [2022-11-20 11:12:52,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1260938747] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:52,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:12:52,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:12:52,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665357387] [2022-11-20 11:12:52,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:52,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:12:52,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:12:52,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:12:52,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:12:52,197 INFO L87 Difference]: Start difference. First operand 1231 states and 4232 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 11:12:52,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:12:52,936 INFO L93 Difference]: Finished difference Result 1286 states and 4140 transitions. [2022-11-20 11:12:52,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:12:52,937 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 11:12:52,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:12:52,941 INFO L225 Difference]: With dead ends: 1286 [2022-11-20 11:12:52,941 INFO L226 Difference]: Without dead ends: 1286 [2022-11-20 11:12:52,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 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 11:12:52,941 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 79 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:12:52,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 13 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 11:12:52,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2022-11-20 11:12:52,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1209. [2022-11-20 11:12:52,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 1064 states have (on average 3.7593984962406015) internal successors, (4000), 1208 states have internal predecessors, (4000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:52,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 4000 transitions. [2022-11-20 11:12:52,992 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 4000 transitions. Word has length 9 [2022-11-20 11:12:52,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:12:52,993 INFO L495 AbstractCegarLoop]: Abstraction has 1209 states and 4000 transitions. [2022-11-20 11:12:52,993 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 11:12:52,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 4000 transitions. [2022-11-20 11:12:52,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:12:52,994 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:12:52,994 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:12:53,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:12:53,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:12:53,206 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:12:53,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:53,208 INFO L85 PathProgramCache]: Analyzing trace with hash -425172721, now seen corresponding path program 1 times [2022-11-20 11:12:53,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:12:53,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1775192794] [2022-11-20 11:12:53,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:53,209 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:12:53,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:12:53,210 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:12:53,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:12:53,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:53,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:12:53,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:53,559 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 11:12:53,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 11:12:53,600 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 11:12:53,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-20 11:12:53,639 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 11:12:53,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 11:12:53,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:12:53,660 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:12:53,660 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:12:53,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1775192794] [2022-11-20 11:12:53,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1775192794] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:53,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:12:53,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:12:53,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082124124] [2022-11-20 11:12:53,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:53,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:12:53,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:12:53,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:12:53,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:12:53,662 INFO L87 Difference]: Start difference. First operand 1209 states and 4000 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 11:12:53,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:12:53,957 INFO L93 Difference]: Finished difference Result 956 states and 3112 transitions. [2022-11-20 11:12:53,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:12:53,958 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 11:12:53,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:12:53,961 INFO L225 Difference]: With dead ends: 956 [2022-11-20 11:12:53,961 INFO L226 Difference]: Without dead ends: 956 [2022-11-20 11:12:53,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 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 11:12:53,962 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 70 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:12:53,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 3 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:12:53,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2022-11-20 11:12:53,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 956. [2022-11-20 11:12:53,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 869 states have (on average 3.581127733026467) internal successors, (3112), 955 states have internal predecessors, (3112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:53,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 3112 transitions. [2022-11-20 11:12:54,000 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 3112 transitions. Word has length 10 [2022-11-20 11:12:54,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:12:54,000 INFO L495 AbstractCegarLoop]: Abstraction has 956 states and 3112 transitions. [2022-11-20 11:12:54,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 11:12:54,000 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 3112 transitions. [2022-11-20 11:12:54,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:12:54,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:12:54,001 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:12:54,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 11:12:54,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:12:54,214 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:12:54,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:54,214 INFO L85 PathProgramCache]: Analyzing trace with hash -425172720, now seen corresponding path program 1 times [2022-11-20 11:12:54,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:12:54,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [85172260] [2022-11-20 11:12:54,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:54,215 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:12:54,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:12:54,216 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:12:54,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:12:54,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:54,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 11:12:54,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:54,590 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:12:54,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:12:54,746 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 11:12:54,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 11:12:54,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:54,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 11:12:54,919 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:12:54,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 11:12:54,994 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-20 11:12:54,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 11:12:55,171 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 11:12:55,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:12:55,978 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 11:12:55,978 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:12:55,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [85172260] [2022-11-20 11:12:55,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [85172260] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:12:55,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:12:55,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 11:12:55,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598349076] [2022-11-20 11:12:55,979 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:12:55,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:12:55,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:12:55,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:12:55,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:12:55,980 INFO L87 Difference]: Start difference. First operand 956 states and 3112 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:57,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:12:57,528 INFO L93 Difference]: Finished difference Result 1882 states and 6500 transitions. [2022-11-20 11:12:57,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:12:57,529 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 11:12:57,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:12:57,534 INFO L225 Difference]: With dead ends: 1882 [2022-11-20 11:12:57,534 INFO L226 Difference]: Without dead ends: 1882 [2022-11-20 11:12:57,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:12:57,534 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 92 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 321 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:12:57,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 54 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 230 Invalid, 0 Unknown, 321 Unchecked, 1.4s Time] [2022-11-20 11:12:57,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1882 states. [2022-11-20 11:12:57,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 1250. [2022-11-20 11:12:57,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1163 states have (on average 3.6706792777300086) internal successors, (4269), 1249 states have internal predecessors, (4269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:57,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 4269 transitions. [2022-11-20 11:12:57,574 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 4269 transitions. Word has length 10 [2022-11-20 11:12:57,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:12:57,574 INFO L495 AbstractCegarLoop]: Abstraction has 1250 states and 4269 transitions. [2022-11-20 11:12:57,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:12:57,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 4269 transitions. [2022-11-20 11:12:57,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:12:57,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:12:57,576 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1] [2022-11-20 11:12:57,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:12:57,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:12:57,788 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:12:57,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:57,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1168509283, now seen corresponding path program 1 times [2022-11-20 11:12:57,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:12:57,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1093127732] [2022-11-20 11:12:57,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:57,789 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:12:57,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:12:57,790 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:12:57,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:12:57,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:57,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 11:12:57,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:57,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 11:12:58,176 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:12:58,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:12:59,455 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:12:59,455 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:12:59,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1093127732] [2022-11-20 11:12:59,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1093127732] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:12:59,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:12:59,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 16 [2022-11-20 11:12:59,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575262918] [2022-11-20 11:12:59,456 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:12:59,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:12:59,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:12:59,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:12:59,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:12:59,457 INFO L87 Difference]: Start difference. First operand 1250 states and 4269 transitions. Second operand has 17 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:03,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:13:03,645 INFO L93 Difference]: Finished difference Result 3506 states and 12014 transitions. [2022-11-20 11:13:03,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:13:03,646 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 11:13:03,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:13:03,656 INFO L225 Difference]: With dead ends: 3506 [2022-11-20 11:13:03,656 INFO L226 Difference]: Without dead ends: 3506 [2022-11-20 11:13:03,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-11-20 11:13:03,657 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 217 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 285 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:13:03,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 78 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 660 Invalid, 0 Unknown, 285 Unchecked, 3.5s Time] [2022-11-20 11:13:03,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3506 states. [2022-11-20 11:13:03,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3506 to 1258. [2022-11-20 11:13:03,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 1171 states have (on average 3.6567036720751496) internal successors, (4282), 1257 states have internal predecessors, (4282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:03,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 4282 transitions. [2022-11-20 11:13:03,728 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 4282 transitions. Word has length 10 [2022-11-20 11:13:03,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:13:03,728 INFO L495 AbstractCegarLoop]: Abstraction has 1258 states and 4282 transitions. [2022-11-20 11:13:03,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:03,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 4282 transitions. [2022-11-20 11:13:03,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:13:03,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:13:03,729 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:13:03,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:13:03,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:13:03,930 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:13:03,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:03,930 INFO L85 PathProgramCache]: Analyzing trace with hash -465334900, now seen corresponding path program 1 times [2022-11-20 11:13:03,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:13:03,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [470102243] [2022-11-20 11:13:03,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:13:03,931 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:13:03,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:13:03,932 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:13:03,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:13:04,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:04,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:13:04,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:13:04,144 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 11:13:04,145 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 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 11:13:04,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:13:04,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 11:13:04,236 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 11:13:04,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 11:13:04,321 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 11:13:04,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:13:04,322 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:13:04,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [470102243] [2022-11-20 11:13:04,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [470102243] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:13:04,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:13:04,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:13:04,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825088674] [2022-11-20 11:13:04,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:13:04,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:13:04,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:13:04,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:13:04,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:13:04,323 INFO L87 Difference]: Start difference. First operand 1258 states and 4282 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 11:13:04,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:13:04,627 INFO L93 Difference]: Finished difference Result 1262 states and 4288 transitions. [2022-11-20 11:13:04,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:13:04,629 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 11:13:04,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:13:04,632 INFO L225 Difference]: With dead ends: 1262 [2022-11-20 11:13:04,632 INFO L226 Difference]: Without dead ends: 1262 [2022-11-20 11:13:04,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:13:04,633 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:13:04,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 38 Unchecked, 0.3s Time] [2022-11-20 11:13:04,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2022-11-20 11:13:04,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 1262. [2022-11-20 11:13:04,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1175 states have (on average 3.6493617021276594) internal successors, (4288), 1261 states have internal predecessors, (4288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:04,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 4288 transitions. [2022-11-20 11:13:04,665 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 4288 transitions. Word has length 10 [2022-11-20 11:13:04,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:13:04,666 INFO L495 AbstractCegarLoop]: Abstraction has 1262 states and 4288 transitions. [2022-11-20 11:13:04,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 11:13:04,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 4288 transitions. [2022-11-20 11:13:04,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:13:04,667 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:13:04,667 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:13:04,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:13:04,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:13:04,884 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:13:04,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:04,884 INFO L85 PathProgramCache]: Analyzing trace with hash 3272723, now seen corresponding path program 1 times [2022-11-20 11:13:04,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:13:04,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [493539967] [2022-11-20 11:13:04,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:13:04,884 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:13:04,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:13:04,885 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:13:04,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:13:05,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:05,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 11:13:05,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:13:05,026 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 11:13:05,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:13:05,026 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:13:05,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [493539967] [2022-11-20 11:13:05,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [493539967] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:13:05,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:13:05,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:13:05,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984210250] [2022-11-20 11:13:05,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:13:05,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:13:05,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:13:05,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:13:05,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:13:05,028 INFO L87 Difference]: Start difference. First operand 1262 states and 4288 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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 11:13:05,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:13:05,283 INFO L93 Difference]: Finished difference Result 958 states and 3064 transitions. [2022-11-20 11:13:05,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:13:05,284 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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 11:13:05,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:13:05,287 INFO L225 Difference]: With dead ends: 958 [2022-11-20 11:13:05,288 INFO L226 Difference]: Without dead ends: 958 [2022-11-20 11:13:05,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 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 11:13:05,289 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 32 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:13:05,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 3 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:13:05,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2022-11-20 11:13:05,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 958. [2022-11-20 11:13:05,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 907 states have (on average 3.378169790518192) internal successors, (3064), 957 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:05,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 3064 transitions. [2022-11-20 11:13:05,310 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 3064 transitions. Word has length 10 [2022-11-20 11:13:05,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:13:05,310 INFO L495 AbstractCegarLoop]: Abstraction has 958 states and 3064 transitions. [2022-11-20 11:13:05,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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 11:13:05,310 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 3064 transitions. [2022-11-20 11:13:05,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:13:05,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:13:05,311 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:13:05,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:13:05,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:13:05,523 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:13:05,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:05,524 INFO L85 PathProgramCache]: Analyzing trace with hash 2826511, now seen corresponding path program 1 times [2022-11-20 11:13:05,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:13:05,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1749264596] [2022-11-20 11:13:05,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:13:05,524 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:13:05,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:13:05,525 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:13:05,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:13:05,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:05,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 11:13:05,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:13:05,746 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 11:13:05,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 11:13:05,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:13:05,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 11:13:05,835 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 11:13:05,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 11:13:05,924 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 11:13:05,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:13:05,924 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:13:05,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1749264596] [2022-11-20 11:13:05,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1749264596] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:13:05,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:13:05,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:13:05,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314566298] [2022-11-20 11:13:05,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:13:05,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:13:05,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:13:05,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:13:05,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:13:05,926 INFO L87 Difference]: Start difference. First operand 958 states and 3064 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 11:13:06,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:13:06,231 INFO L93 Difference]: Finished difference Result 960 states and 3068 transitions. [2022-11-20 11:13:06,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:13:06,233 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 11:13:06,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:13:06,236 INFO L225 Difference]: With dead ends: 960 [2022-11-20 11:13:06,236 INFO L226 Difference]: Without dead ends: 960 [2022-11-20 11:13:06,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:13:06,236 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:13:06,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 37 Unchecked, 0.3s Time] [2022-11-20 11:13:06,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2022-11-20 11:13:06,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 960. [2022-11-20 11:13:06,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 909 states have (on average 3.3751375137513753) internal successors, (3068), 959 states have internal predecessors, (3068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:06,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3068 transitions. [2022-11-20 11:13:06,263 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3068 transitions. Word has length 10 [2022-11-20 11:13:06,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:13:06,263 INFO L495 AbstractCegarLoop]: Abstraction has 960 states and 3068 transitions. [2022-11-20 11:13:06,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 11:13:06,264 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3068 transitions. [2022-11-20 11:13:06,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:13:06,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:13:06,264 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:13:06,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:13:06,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:13:06,477 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:13:06,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:06,477 INFO L85 PathProgramCache]: Analyzing trace with hash -295438054, now seen corresponding path program 1 times [2022-11-20 11:13:06,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:13:06,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1406565092] [2022-11-20 11:13:06,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:13:06,478 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:13:06,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:13:06,479 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:13:06,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:13:06,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:06,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 11:13:06,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:13:06,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:13:06,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:13:06,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:13:06,984 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:13:06,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1406565092] [2022-11-20 11:13:06,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1406565092] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:13:06,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:13:06,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 11:13:06,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816999876] [2022-11-20 11:13:06,984 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:13:06,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:13:06,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:13:06,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:13:06,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:13:06,985 INFO L87 Difference]: Start difference. First operand 960 states and 3068 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:10,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:13:10,911 INFO L93 Difference]: Finished difference Result 1812 states and 5679 transitions. [2022-11-20 11:13:10,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 11:13:10,913 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 11:13:10,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:13:10,916 INFO L225 Difference]: With dead ends: 1812 [2022-11-20 11:13:10,916 INFO L226 Difference]: Without dead ends: 1812 [2022-11-20 11:13:10,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:13:10,919 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 373 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:13:10,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 66 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-20 11:13:10,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2022-11-20 11:13:10,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1432. [2022-11-20 11:13:10,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1381 states have (on average 3.454018826937002) internal successors, (4770), 1431 states have internal predecessors, (4770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:10,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 4770 transitions. [2022-11-20 11:13:10,964 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 4770 transitions. Word has length 11 [2022-11-20 11:13:10,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:13:10,964 INFO L495 AbstractCegarLoop]: Abstraction has 1432 states and 4770 transitions. [2022-11-20 11:13:10,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:10,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 4770 transitions. [2022-11-20 11:13:10,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:13:10,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:13:10,965 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:13:10,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:13:11,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:13:11,166 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:13:11,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:11,167 INFO L85 PathProgramCache]: Analyzing trace with hash -294953489, now seen corresponding path program 1 times [2022-11-20 11:13:11,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:13:11,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [540328790] [2022-11-20 11:13:11,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:13:11,167 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:13:11,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:13:11,169 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:13:11,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:13:11,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:11,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 11:13:11,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:13:11,513 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 11:13:11,513 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 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 11:13:11,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:13:11,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 11:13:11,619 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 11:13:11,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 11:13:11,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:13:11,689 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:13:11,689 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:13:11,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [540328790] [2022-11-20 11:13:11,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [540328790] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:13:11,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:13:11,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:13:11,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398498002] [2022-11-20 11:13:11,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:13:11,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:13:11,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:13:11,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:13:11,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:13:11,690 INFO L87 Difference]: Start difference. First operand 1432 states and 4770 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 11:13:11,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:13:11,892 INFO L93 Difference]: Finished difference Result 1432 states and 4800 transitions. [2022-11-20 11:13:11,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:13:11,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 11:13:11,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:13:11,897 INFO L225 Difference]: With dead ends: 1432 [2022-11-20 11:13:11,897 INFO L226 Difference]: Without dead ends: 1432 [2022-11-20 11:13:11,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:13:11,898 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:13:11,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 37 Unchecked, 0.2s Time] [2022-11-20 11:13:11,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2022-11-20 11:13:11,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1432. [2022-11-20 11:13:11,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1381 states have (on average 3.4757422157856626) internal successors, (4800), 1431 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:11,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 4800 transitions. [2022-11-20 11:13:11,930 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 4800 transitions. Word has length 11 [2022-11-20 11:13:11,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:13:11,931 INFO L495 AbstractCegarLoop]: Abstraction has 1432 states and 4800 transitions. [2022-11-20 11:13:11,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 11:13:11,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 4800 transitions. [2022-11-20 11:13:11,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:13:11,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:13:11,932 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:13:11,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:13:12,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:13:12,144 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:13:12,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:12,145 INFO L85 PathProgramCache]: Analyzing trace with hash 101446031, now seen corresponding path program 1 times [2022-11-20 11:13:12,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:13:12,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307054338] [2022-11-20 11:13:12,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:13:12,146 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 11:13:12,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:13:12,148 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:13:12,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:13:12,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:13:12,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 11:13:12,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:13:12,371 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 11:13:12,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:13:12,372 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:13:12,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307054338] [2022-11-20 11:13:12,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307054338] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:13:12,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:13:12,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:13:12,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286659551] [2022-11-20 11:13:12,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:13:12,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:13:12,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:13:12,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:13:12,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:13:12,373 INFO L87 Difference]: Start difference. First operand 1432 states and 4800 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 11:13:12,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:13:12,938 INFO L93 Difference]: Finished difference Result 1377 states and 4563 transitions. [2022-11-20 11:13:12,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:13:12,939 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 11:13:12,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:13:12,942 INFO L225 Difference]: With dead ends: 1377 [2022-11-20 11:13:12,942 INFO L226 Difference]: Without dead ends: 1377 [2022-11-20 11:13:12,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 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 11:13:12,943 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 50 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:13:12,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 13 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 11:13:12,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2022-11-20 11:13:12,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 1364. [2022-11-20 11:13:12,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1364 states, 1313 states have (on average 3.466108149276466) internal successors, (4551), 1363 states have internal predecessors, (4551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:12,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1364 states to 1364 states and 4551 transitions. [2022-11-20 11:13:12,974 INFO L78 Accepts]: Start accepts. Automaton has 1364 states and 4551 transitions. Word has length 11 [2022-11-20 11:13:12,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:13:12,974 INFO L495 AbstractCegarLoop]: Abstraction has 1364 states and 4551 transitions. [2022-11-20 11:13:12,975 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 11:13:12,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1364 states and 4551 transitions. [2022-11-20 11:13:12,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:13:12,975 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:13:12,975 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-20 11:13:12,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:13:13,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:13:13,187 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:13:13,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:13:13,187 INFO L85 PathProgramCache]: Analyzing trace with hash 2094627305, now seen corresponding path program 3 times [2022-11-20 11:13:13,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:13:13,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [282004961] [2022-11-20 11:13:13,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:13:13,188 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:13:13,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:13:13,189 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:13:13,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:13:13,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 11:13:13,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:13:13,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:13:13,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:13:13,548 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:13:13,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:13:14,064 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:13:14,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:13:17,234 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:13:17,235 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:13:17,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [282004961] [2022-11-20 11:13:17,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [282004961] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:13:17,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:13:17,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-20 11:13:17,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296604619] [2022-11-20 11:13:17,235 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:13:17,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 11:13:17,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:13:17,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 11:13:17,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-20 11:13:17,237 INFO L87 Difference]: Start difference. First operand 1364 states and 4551 transitions. Second operand has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:13:35,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:13:37,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:13:39,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:13:41,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:13:43,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:13:45,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:13:47,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:13:49,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:13:51,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:13:53,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:14:00,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:14:02,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:14:04,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:14:06,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:14:08,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:14:10,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:14:12,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:14:14,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:14:16,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:14:18,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:14:24,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:24,797 INFO L93 Difference]: Finished difference Result 8645 states and 29298 transitions. [2022-11-20 11:14:24,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 11:14:24,799 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:14:24,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:24,819 INFO L225 Difference]: With dead ends: 8645 [2022-11-20 11:14:24,819 INFO L226 Difference]: Without dead ends: 8645 [2022-11-20 11:14:24,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:14:24,820 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 2299 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 4375 mSolverCounterSat, 591 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2299 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 4986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 591 IncrementalHoareTripleChecker+Valid, 4375 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:24,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2299 Valid, 393 Invalid, 4986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [591 Valid, 4375 Invalid, 20 Unknown, 0 Unchecked, 51.9s Time] [2022-11-20 11:14:24,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8645 states. [2022-11-20 11:14:24,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8645 to 1386. [2022-11-20 11:14:24,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1335 states have (on average 3.438202247191011) internal successors, (4590), 1385 states have internal predecessors, (4590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:24,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 4590 transitions. [2022-11-20 11:14:24,913 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 4590 transitions. Word has length 12 [2022-11-20 11:14:24,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:24,913 INFO L495 AbstractCegarLoop]: Abstraction has 1386 states and 4590 transitions. [2022-11-20 11:14:24,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:24,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 4590 transitions. [2022-11-20 11:14:24,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:14:24,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:24,914 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:24,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:14:25,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:25,129 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:14:25,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:25,129 INFO L85 PathProgramCache]: Analyzing trace with hash -822107536, now seen corresponding path program 2 times [2022-11-20 11:14:25,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:14:25,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2111766134] [2022-11-20 11:14:25,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:14:25,130 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:25,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:14:25,130 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:14:25,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:14:25,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:14:25,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:25,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:14:25,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:25,405 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:14:25,405 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 11:14:25,542 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 11:14:25,542 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 15 treesize of output 50 [2022-11-20 11:14:25,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:14:25,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 11:14:25,680 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:14:25,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 11:14:25,728 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-20 11:14:25,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 11:14:25,809 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 11:14:25,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:14:25,810 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:14:25,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2111766134] [2022-11-20 11:14:25,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2111766134] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:14:25,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:14:25,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:14:25,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971935817] [2022-11-20 11:14:25,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:14:25,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:14:25,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:14:25,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:14:25,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:14:25,811 INFO L87 Difference]: Start difference. First operand 1386 states and 4590 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 11:14:26,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:26,409 INFO L93 Difference]: Finished difference Result 1685 states and 5427 transitions. [2022-11-20 11:14:26,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:14:26,411 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 12 [2022-11-20 11:14:26,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:26,416 INFO L225 Difference]: With dead ends: 1685 [2022-11-20 11:14:26,416 INFO L226 Difference]: Without dead ends: 1685 [2022-11-20 11:14:26,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 1 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 11:14:26,417 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 107 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:26,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 7 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 11:14:26,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1685 states. [2022-11-20 11:14:26,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1685 to 1060. [2022-11-20 11:14:26,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 1009 states have (on average 3.3875123885034686) internal successors, (3418), 1059 states have internal predecessors, (3418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:26,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 3418 transitions. [2022-11-20 11:14:26,434 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 3418 transitions. Word has length 12 [2022-11-20 11:14:26,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:26,434 INFO L495 AbstractCegarLoop]: Abstraction has 1060 states and 3418 transitions. [2022-11-20 11:14:26,434 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 11:14:26,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 3418 transitions. [2022-11-20 11:14:26,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:14:26,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:26,435 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:26,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 11:14:26,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:26,639 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:14:26,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:26,640 INFO L85 PathProgramCache]: Analyzing trace with hash -553637026, now seen corresponding path program 1 times [2022-11-20 11:14:26,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:14:26,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [465815172] [2022-11-20 11:14:26,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:26,640 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 11:14:26,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:14:26,641 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:14:26,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:14:26,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:26,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:14:26,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:26,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 11:14:26,891 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 11:14:26,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-20 11:14:26,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:14:26,910 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:14:26,911 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:14:26,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [465815172] [2022-11-20 11:14:26,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [465815172] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:14:26,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:14:26,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:14:26,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762896868] [2022-11-20 11:14:26,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:14:26,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:14:26,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:14:26,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:14:26,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:14:26,912 INFO L87 Difference]: Start difference. First operand 1060 states and 3418 transitions. Second operand has 4 states, 3 states have (on average 4.0) 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 11:14:27,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:27,187 INFO L93 Difference]: Finished difference Result 817 states and 2565 transitions. [2022-11-20 11:14:27,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:14:27,188 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) 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 11:14:27,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:27,191 INFO L225 Difference]: With dead ends: 817 [2022-11-20 11:14:27,191 INFO L226 Difference]: Without dead ends: 817 [2022-11-20 11:14:27,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 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 11:14:27,192 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 61 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:27,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 3 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:14:27,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-11-20 11:14:27,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 817. [2022-11-20 11:14:27,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 785 states have (on average 3.267515923566879) internal successors, (2565), 816 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 11:14:27,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 2565 transitions. [2022-11-20 11:14:27,209 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 2565 transitions. Word has length 12 [2022-11-20 11:14:27,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:27,210 INFO L495 AbstractCegarLoop]: Abstraction has 817 states and 2565 transitions. [2022-11-20 11:14:27,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) 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 11:14:27,210 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 2565 transitions. [2022-11-20 11:14:27,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:14:27,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:27,211 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:27,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:27,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:27,423 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:14:27,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:27,424 INFO L85 PathProgramCache]: Analyzing trace with hash -553637025, now seen corresponding path program 1 times [2022-11-20 11:14:27,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:14:27,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1767966054] [2022-11-20 11:14:27,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:27,424 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:27,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:14:27,425 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:14:27,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:14:27,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:27,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 11:14:27,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:27,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 11:14:27,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 11:14:27,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:14:27,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 11:14:27,802 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:14:27,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 11:14:27,935 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 11:14:27,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:31,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:14:31,351 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 11:14:31,352 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:14:31,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1767966054] [2022-11-20 11:14:31,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1767966054] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:31,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:14:31,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 11:14:31,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258402007] [2022-11-20 11:14:31,352 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:31,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:14:31,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:14:31,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:14:31,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:14:31,353 INFO L87 Difference]: Start difference. First operand 817 states and 2565 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:36,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:36,056 INFO L93 Difference]: Finished difference Result 2184 states and 6870 transitions. [2022-11-20 11:14:36,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 11:14:36,058 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 11:14:36,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:36,072 INFO L225 Difference]: With dead ends: 2184 [2022-11-20 11:14:36,073 INFO L226 Difference]: Without dead ends: 2184 [2022-11-20 11:14:36,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:14:36,073 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 178 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 245 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:36,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 61 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 352 Invalid, 0 Unknown, 245 Unchecked, 1.8s Time] [2022-11-20 11:14:36,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2022-11-20 11:14:36,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 869. [2022-11-20 11:14:36,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 837 states have (on average 3.204301075268817) internal successors, (2682), 868 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:36,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2682 transitions. [2022-11-20 11:14:36,093 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2682 transitions. Word has length 12 [2022-11-20 11:14:36,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:36,093 INFO L495 AbstractCegarLoop]: Abstraction has 869 states and 2682 transitions. [2022-11-20 11:14:36,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:36,094 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2682 transitions. [2022-11-20 11:14:36,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:14:36,094 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:36,094 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:36,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 11:14:36,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:36,295 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:14:36,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:36,295 INFO L85 PathProgramCache]: Analyzing trace with hash -510649814, now seen corresponding path program 1 times [2022-11-20 11:14:36,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:14:36,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [467198129] [2022-11-20 11:14:36,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:36,296 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:36,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:14:36,297 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:14:36,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:14:36,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:36,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 11:14:36,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:36,541 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 11:14:36,542 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 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 11:14:36,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:14:36,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 11:14:36,625 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 11:14:36,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 11:14:36,721 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 11:14:36,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:14:36,722 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:14:36,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [467198129] [2022-11-20 11:14:36,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [467198129] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:14:36,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:14:36,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:14:36,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279713752] [2022-11-20 11:14:36,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:14:36,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:14:36,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:14:36,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:14:36,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:14:36,724 INFO L87 Difference]: Start difference. First operand 869 states and 2682 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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 11:14:36,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:36,974 INFO L93 Difference]: Finished difference Result 870 states and 2683 transitions. [2022-11-20 11:14:36,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:14:36,975 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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 11:14:36,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:36,977 INFO L225 Difference]: With dead ends: 870 [2022-11-20 11:14:36,977 INFO L226 Difference]: Without dead ends: 870 [2022-11-20 11:14:36,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:14:36,978 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:36,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 9 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-11-20 11:14:36,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2022-11-20 11:14:36,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 870. [2022-11-20 11:14:36,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 838 states have (on average 3.2016706443914082) internal successors, (2683), 869 states have internal predecessors, (2683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:36,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 2683 transitions. [2022-11-20 11:14:36,995 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 2683 transitions. Word has length 12 [2022-11-20 11:14:36,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:36,995 INFO L495 AbstractCegarLoop]: Abstraction has 870 states and 2683 transitions. [2022-11-20 11:14:36,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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 11:14:36,995 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 2683 transitions. [2022-11-20 11:14:36,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:14:36,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:36,996 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:37,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:14:37,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:37,199 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:14:37,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:37,200 INFO L85 PathProgramCache]: Analyzing trace with hash -447785283, now seen corresponding path program 1 times [2022-11-20 11:14:37,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:14:37,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [431544197] [2022-11-20 11:14:37,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:37,201 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 11:14:37,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:14:37,201 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:14:37,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:14:37,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:37,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 11:14:37,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:37,589 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 11:14:37,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 11:14:37,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:14:37,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-20 11:14:37,725 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:14:37,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-20 11:14:37,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:14:37,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:14:37,919 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:14:37,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [431544197] [2022-11-20 11:14:37,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [431544197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:14:37,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:14:37,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:14:37,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056566275] [2022-11-20 11:14:37,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:14:37,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:14:37,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:14:37,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:14:37,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:14:37,920 INFO L87 Difference]: Start difference. First operand 870 states and 2683 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 11:14:38,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:38,171 INFO L93 Difference]: Finished difference Result 1000 states and 3257 transitions. [2022-11-20 11:14:38,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:14:38,173 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 11:14:38,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:38,175 INFO L225 Difference]: With dead ends: 1000 [2022-11-20 11:14:38,176 INFO L226 Difference]: Without dead ends: 1000 [2022-11-20 11:14:38,176 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 11:14:38,176 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:38,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 19 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 111 Unchecked, 0.2s Time] [2022-11-20 11:14:38,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2022-11-20 11:14:38,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 880. [2022-11-20 11:14:38,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 848 states have (on average 3.2087264150943398) internal successors, (2721), 879 states have internal predecessors, (2721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:38,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 2721 transitions. [2022-11-20 11:14:38,197 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 2721 transitions. Word has length 13 [2022-11-20 11:14:38,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:38,198 INFO L495 AbstractCegarLoop]: Abstraction has 880 states and 2721 transitions. [2022-11-20 11:14:38,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 11:14:38,198 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 2721 transitions. [2022-11-20 11:14:38,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:14:38,199 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:38,199 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:38,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:38,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:38,412 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:14:38,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:38,412 INFO L85 PathProgramCache]: Analyzing trace with hash -450870093, now seen corresponding path program 2 times [2022-11-20 11:14:38,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:14:38,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [572619202] [2022-11-20 11:14:38,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:14:38,413 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:38,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:14:38,414 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:14:38,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:14:38,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:14:38,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:38,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:14:38,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:38,696 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:14:38,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 41 [2022-11-20 11:14:38,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:14:38,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-20 11:14:38,826 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:14:38,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-20 11:14:39,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:14:39,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:14:39,005 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:14:39,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [572619202] [2022-11-20 11:14:39,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [572619202] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:14:39,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:14:39,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:14:39,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048565825] [2022-11-20 11:14:39,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:14:39,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:14:39,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:14:39,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:14:39,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:14:39,007 INFO L87 Difference]: Start difference. First operand 880 states and 2721 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 11:14:39,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:39,219 INFO L93 Difference]: Finished difference Result 887 states and 2757 transitions. [2022-11-20 11:14:39,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:14:39,221 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 11:14:39,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:39,223 INFO L225 Difference]: With dead ends: 887 [2022-11-20 11:14:39,223 INFO L226 Difference]: Without dead ends: 887 [2022-11-20 11:14:39,223 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 11:14:39,223 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:39,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 12 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 44 Unchecked, 0.2s Time] [2022-11-20 11:14:39,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2022-11-20 11:14:39,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 884. [2022-11-20 11:14:39,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 852 states have (on average 3.217136150234742) internal successors, (2741), 883 states have internal predecessors, (2741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:39,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 2741 transitions. [2022-11-20 11:14:39,236 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 2741 transitions. Word has length 13 [2022-11-20 11:14:39,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:39,236 INFO L495 AbstractCegarLoop]: Abstraction has 884 states and 2741 transitions. [2022-11-20 11:14:39,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 11:14:39,237 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 2741 transitions. [2022-11-20 11:14:39,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:14:39,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:39,237 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:39,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:14:39,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:39,439 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:14:39,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:39,440 INFO L85 PathProgramCache]: Analyzing trace with hash -451305333, now seen corresponding path program 3 times [2022-11-20 11:14:39,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:14:39,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1419924984] [2022-11-20 11:14:39,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:14:39,440 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:39,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:14:39,441 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:14:39,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:14:39,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 11:14:39,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:39,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:14:39,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:39,750 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:14:39,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-20 11:14:39,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:14:39,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-20 11:14:39,867 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:14:39,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-20 11:14:40,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:14:40,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:14:40,087 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:14:40,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1419924984] [2022-11-20 11:14:40,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1419924984] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:14:40,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:14:40,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:14:40,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774292358] [2022-11-20 11:14:40,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:14:40,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:14:40,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:14:40,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:14:40,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:14:40,089 INFO L87 Difference]: Start difference. First operand 884 states and 2741 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 11:14:40,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:40,264 INFO L93 Difference]: Finished difference Result 891 states and 2785 transitions. [2022-11-20 11:14:40,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:14:40,265 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 11:14:40,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:40,267 INFO L225 Difference]: With dead ends: 891 [2022-11-20 11:14:40,267 INFO L226 Difference]: Without dead ends: 891 [2022-11-20 11:14:40,267 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 11:14:40,268 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:40,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 16 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-11-20 11:14:40,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2022-11-20 11:14:40,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 880. [2022-11-20 11:14:40,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 848 states have (on average 3.213443396226415) internal successors, (2725), 879 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:40,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 2725 transitions. [2022-11-20 11:14:40,285 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 2725 transitions. Word has length 13 [2022-11-20 11:14:40,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:40,286 INFO L495 AbstractCegarLoop]: Abstraction has 880 states and 2725 transitions. [2022-11-20 11:14:40,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 11:14:40,286 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 2725 transitions. [2022-11-20 11:14:40,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:14:40,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:40,287 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:40,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:40,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:40,499 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:14:40,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:40,500 INFO L85 PathProgramCache]: Analyzing trace with hash 17571215, now seen corresponding path program 1 times [2022-11-20 11:14:40,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:14:40,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [488514429] [2022-11-20 11:14:40,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:40,500 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:40,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:14:40,501 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:14:40,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:14:40,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:40,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 11:14:40,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:40,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 11:14:40,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 11:14:40,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:14:40,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 11:14:40,895 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:14:40,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 11:14:41,051 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 11:14:41,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:41,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:14:41,958 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 11:14:41,958 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:14:41,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [488514429] [2022-11-20 11:14:41,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [488514429] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:41,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:14:41,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 11:14:41,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182802348] [2022-11-20 11:14:41,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:41,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:14:41,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:14:41,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:14:41,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:14:41,959 INFO L87 Difference]: Start difference. First operand 880 states and 2725 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 11:14:48,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:48,366 INFO L93 Difference]: Finished difference Result 1623 states and 5170 transitions. [2022-11-20 11:14:48,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 11:14:48,367 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 11:14:48,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:48,370 INFO L225 Difference]: With dead ends: 1623 [2022-11-20 11:14:48,370 INFO L226 Difference]: Without dead ends: 1623 [2022-11-20 11:14:48,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:14:48,371 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 119 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:48,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 64 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 354 Invalid, 0 Unknown, 190 Unchecked, 1.7s Time] [2022-11-20 11:14:48,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2022-11-20 11:14:48,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 890. [2022-11-20 11:14:48,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 858 states have (on average 3.2167832167832167) internal successors, (2760), 889 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:48,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 2760 transitions. [2022-11-20 11:14:48,388 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 2760 transitions. Word has length 13 [2022-11-20 11:14:48,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:48,388 INFO L495 AbstractCegarLoop]: Abstraction has 890 states and 2760 transitions. [2022-11-20 11:14:48,388 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 11:14:48,388 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 2760 transitions. [2022-11-20 11:14:48,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:14:48,389 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:48,389 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:48,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:14:48,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:48,589 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:14:48,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:48,590 INFO L85 PathProgramCache]: Analyzing trace with hash 17130395, now seen corresponding path program 2 times [2022-11-20 11:14:48,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:14:48,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1900305827] [2022-11-20 11:14:48,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:14:48,590 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:48,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:14:48,591 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:14:48,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:14:48,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:14:48,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:48,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:14:48,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:48,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 11:14:48,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 11:14:48,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:14:48,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 11:14:48,889 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:14:48,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 11:14:48,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:14:48,996 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:14:48,996 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:14:48,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1900305827] [2022-11-20 11:14:48,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1900305827] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:14:48,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:14:48,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:14:48,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810576190] [2022-11-20 11:14:48,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:14:48,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:14:48,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:14:48,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:14:48,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:14:48,998 INFO L87 Difference]: Start difference. First operand 890 states and 2760 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 11:14:49,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:49,502 INFO L93 Difference]: Finished difference Result 1205 states and 3806 transitions. [2022-11-20 11:14:49,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:14:49,503 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 11:14:49,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:49,506 INFO L225 Difference]: With dead ends: 1205 [2022-11-20 11:14:49,506 INFO L226 Difference]: Without dead ends: 1205 [2022-11-20 11:14:49,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:14:49,507 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 110 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:49,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 7 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:14:49,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2022-11-20 11:14:49,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 968. [2022-11-20 11:14:49,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 936 states have (on average 3.451923076923077) internal successors, (3231), 967 states have internal predecessors, (3231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:49,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 3231 transitions. [2022-11-20 11:14:49,523 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 3231 transitions. Word has length 13 [2022-11-20 11:14:49,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:49,523 INFO L495 AbstractCegarLoop]: Abstraction has 968 states and 3231 transitions. [2022-11-20 11:14:49,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 11:14:49,523 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 3231 transitions. [2022-11-20 11:14:49,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:14:49,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:49,524 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:49,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:14:49,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:49,724 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:14:49,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:49,725 INFO L85 PathProgramCache]: Analyzing trace with hash 17128909, now seen corresponding path program 1 times [2022-11-20 11:14:49,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:14:49,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245071213] [2022-11-20 11:14:49,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:49,725 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:49,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:14:49,726 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:14:49,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:14:49,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:49,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 11:14:49,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:50,018 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 11:14:50,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:50,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:14:50,129 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:14:50,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245071213] [2022-11-20 11:14:50,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245071213] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:50,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:14:50,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-20 11:14:50,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840076832] [2022-11-20 11:14:50,130 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:50,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:14:50,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:14:50,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:14:50,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:14:50,131 INFO L87 Difference]: Start difference. First operand 968 states and 3231 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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 11:14:51,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:51,600 INFO L93 Difference]: Finished difference Result 1140 states and 3515 transitions. [2022-11-20 11:14:51,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 11:14:51,601 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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 11:14:51,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:51,604 INFO L225 Difference]: With dead ends: 1140 [2022-11-20 11:14:51,604 INFO L226 Difference]: Without dead ends: 1140 [2022-11-20 11:14:51,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:14:51,605 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 230 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:51,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 42 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 11:14:51,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2022-11-20 11:14:51,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 947. [2022-11-20 11:14:51,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 915 states have (on average 3.3234972677595627) internal successors, (3041), 946 states have internal predecessors, (3041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:51,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 3041 transitions. [2022-11-20 11:14:51,624 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 3041 transitions. Word has length 13 [2022-11-20 11:14:51,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:51,625 INFO L495 AbstractCegarLoop]: Abstraction has 947 states and 3041 transitions. [2022-11-20 11:14:51,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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 11:14:51,625 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 3041 transitions. [2022-11-20 11:14:51,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:14:51,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:51,625 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:51,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:51,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:51,826 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:14:51,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:51,826 INFO L85 PathProgramCache]: Analyzing trace with hash 17134024, now seen corresponding path program 1 times [2022-11-20 11:14:51,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:14:51,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2041275178] [2022-11-20 11:14:51,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:51,827 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:51,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:14:51,828 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:14:51,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:14:52,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:52,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 11:14:52,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:52,147 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 11:14:52,147 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 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 11:14:52,184 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:14:52,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 24 [2022-11-20 11:14:52,220 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:14:52,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-20 11:14:52,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:14:52,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:14:52,342 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:14:52,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2041275178] [2022-11-20 11:14:52,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2041275178] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:14:52,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:14:52,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:14:52,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770535158] [2022-11-20 11:14:52,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:14:52,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:14:52,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:14:52,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:14:52,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:14:52,343 INFO L87 Difference]: Start difference. First operand 947 states and 3041 transitions. Second operand has 5 states, 4 states have (on average 3.25) 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 11:14:52,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:52,663 INFO L93 Difference]: Finished difference Result 939 states and 3011 transitions. [2022-11-20 11:14:52,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:14:52,666 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) 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 11:14:52,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:52,669 INFO L225 Difference]: With dead ends: 939 [2022-11-20 11:14:52,669 INFO L226 Difference]: Without dead ends: 939 [2022-11-20 11:14:52,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:14:52,688 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:52,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 12 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 39 Unchecked, 0.3s Time] [2022-11-20 11:14:52,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2022-11-20 11:14:52,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 939. [2022-11-20 11:14:52,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 907 states have (on average 3.3197353914002203) internal successors, (3011), 938 states have internal predecessors, (3011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:52,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 3011 transitions. [2022-11-20 11:14:52,707 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 3011 transitions. Word has length 13 [2022-11-20 11:14:52,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:52,707 INFO L495 AbstractCegarLoop]: Abstraction has 939 states and 3011 transitions. [2022-11-20 11:14:52,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) 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 11:14:52,708 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 3011 transitions. [2022-11-20 11:14:52,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:14:52,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:52,709 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:52,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-20 11:14:52,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:52,922 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:14:52,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:52,922 INFO L85 PathProgramCache]: Analyzing trace with hash 17133774, now seen corresponding path program 1 times [2022-11-20 11:14:52,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:14:52,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [230046342] [2022-11-20 11:14:52,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:14:52,923 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:52,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:14:52,923 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:14:52,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:14:53,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:14:53,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 11:14:53,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:53,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:14:53,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:14:53,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:14:53,425 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:14:53,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [230046342] [2022-11-20 11:14:53,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [230046342] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:14:53,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:14:53,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 11:14:53,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010381057] [2022-11-20 11:14:53,426 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:14:53,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:14:53,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:14:53,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:14:53,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:14:53,427 INFO L87 Difference]: Start difference. First operand 939 states and 3011 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 11:14:55,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:14:55,691 INFO L93 Difference]: Finished difference Result 1049 states and 3148 transitions. [2022-11-20 11:14:55,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 11:14:55,692 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 11:14:55,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:14:55,694 INFO L225 Difference]: With dead ends: 1049 [2022-11-20 11:14:55,694 INFO L226 Difference]: Without dead ends: 1049 [2022-11-20 11:14:55,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:14:55,707 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 281 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:14:55,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 71 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-20 11:14:55,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2022-11-20 11:14:55,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 978. [2022-11-20 11:14:55,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 946 states have (on average 3.2019027484143763) internal successors, (3029), 977 states have internal predecessors, (3029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:14:55,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 3029 transitions. [2022-11-20 11:14:55,719 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 3029 transitions. Word has length 13 [2022-11-20 11:14:55,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:14:55,720 INFO L495 AbstractCegarLoop]: Abstraction has 978 states and 3029 transitions. [2022-11-20 11:14:55,720 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 11:14:55,720 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 3029 transitions. [2022-11-20 11:14:55,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:14:55,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:14:55,720 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:14:55,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-11-20 11:14:55,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:14:55,923 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:14:55,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:14:55,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1226083620, now seen corresponding path program 2 times [2022-11-20 11:14:55,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:14:55,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1106899529] [2022-11-20 11:14:55,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:14:55,924 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 11:14:55,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:14:55,925 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:14:55,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:14:56,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:14:56,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:14:56,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:14:56,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:14:56,309 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 11:14:56,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-20 11:14:56,438 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 11:14:56,438 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 15 treesize of output 50 [2022-11-20 11:14:56,566 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 11:14:56,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-20 11:14:56,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:14:56,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:14:56,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:14:56,646 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:14:56,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 11:14:56,753 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:14:56,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:00,354 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:15:00,354 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:15:00,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1106899529] [2022-11-20 11:15:00,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1106899529] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:00,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:15:00,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 11:15:00,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367610290] [2022-11-20 11:15:00,355 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:00,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:15:00,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:15:00,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:15:00,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:15:00,356 INFO L87 Difference]: Start difference. First operand 978 states and 3029 transitions. Second operand has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 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 11:15:02,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:02,407 INFO L93 Difference]: Finished difference Result 1967 states and 6101 transitions. [2022-11-20 11:15:02,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:15:02,408 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 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 11:15:02,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:02,412 INFO L225 Difference]: With dead ends: 1967 [2022-11-20 11:15:02,412 INFO L226 Difference]: Without dead ends: 1967 [2022-11-20 11:15:02,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:15:02,413 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 299 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 246 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:02,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 66 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 465 Invalid, 0 Unknown, 246 Unchecked, 1.9s Time] [2022-11-20 11:15:02,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2022-11-20 11:15:02,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1069. [2022-11-20 11:15:02,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1037 states have (on average 3.3027965284474448) internal successors, (3425), 1068 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:02,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 3425 transitions. [2022-11-20 11:15:02,440 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 3425 transitions. Word has length 14 [2022-11-20 11:15:02,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:02,440 INFO L495 AbstractCegarLoop]: Abstraction has 1069 states and 3425 transitions. [2022-11-20 11:15:02,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 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 11:15:02,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 3425 transitions. [2022-11-20 11:15:02,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:15:02,441 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:02,441 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:02,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:15:02,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:15:02,641 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:15:02,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:02,642 INFO L85 PathProgramCache]: Analyzing trace with hash -996164096, now seen corresponding path program 1 times [2022-11-20 11:15:02,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:15:02,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1007692566] [2022-11-20 11:15:02,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:02,642 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:15:02,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:15:02,643 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:15:02,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:15:02,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:02,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 11:15:02,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:03,031 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 11:15:03,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 11:15:03,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:15:03,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-20 11:15:03,137 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:15:03,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-20 11:15:03,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:15:03,312 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:15:03,312 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:15:03,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1007692566] [2022-11-20 11:15:03,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1007692566] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:15:03,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:15:03,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:15:03,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515064453] [2022-11-20 11:15:03,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:15:03,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:15:03,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:15:03,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:15:03,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:15:03,313 INFO L87 Difference]: Start difference. First operand 1069 states and 3425 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 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 11:15:03,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:03,538 INFO L93 Difference]: Finished difference Result 1545 states and 5058 transitions. [2022-11-20 11:15:03,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:15:03,539 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 11:15:03,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:03,544 INFO L225 Difference]: With dead ends: 1545 [2022-11-20 11:15:03,544 INFO L226 Difference]: Without dead ends: 1545 [2022-11-20 11:15:03,544 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 11:15:03,545 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 23 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:03,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 19 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 101 Unchecked, 0.2s Time] [2022-11-20 11:15:03,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2022-11-20 11:15:03,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1080. [2022-11-20 11:15:03,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 1048 states have (on average 3.286259541984733) internal successors, (3444), 1079 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:03,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 3444 transitions. [2022-11-20 11:15:03,592 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 3444 transitions. Word has length 14 [2022-11-20 11:15:03,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:03,592 INFO L495 AbstractCegarLoop]: Abstraction has 1080 states and 3444 transitions. [2022-11-20 11:15:03,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 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 11:15:03,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 3444 transitions. [2022-11-20 11:15:03,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:15:03,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:03,593 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:03,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:15:03,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:15:03,806 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:15:03,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:03,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1091793206, now seen corresponding path program 2 times [2022-11-20 11:15:03,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:15:03,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1361850684] [2022-11-20 11:15:03,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:15:03,807 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:15:03,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:15:03,808 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:15:03,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:15:03,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:15:03,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:15:03,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 11:15:03,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:04,064 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 11:15:04,065 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 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 11:15:04,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:15:04,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 11:15:04,166 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 11:15:04,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 11:15:04,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 11:15:04,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:15:04,259 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:15:04,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1361850684] [2022-11-20 11:15:04,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1361850684] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:15:04,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:15:04,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:15:04,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215157921] [2022-11-20 11:15:04,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:15:04,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:15:04,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:15:04,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:15:04,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:15:04,261 INFO L87 Difference]: Start difference. First operand 1080 states and 3444 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:04,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:04,487 INFO L93 Difference]: Finished difference Result 1076 states and 3436 transitions. [2022-11-20 11:15:04,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:15:04,488 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 11:15:04,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:04,490 INFO L225 Difference]: With dead ends: 1076 [2022-11-20 11:15:04,490 INFO L226 Difference]: Without dead ends: 1076 [2022-11-20 11:15:04,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:15:04,491 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:04,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 9 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-11-20 11:15:04,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2022-11-20 11:15:04,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 1076. [2022-11-20 11:15:04,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1076 states, 1044 states have (on average 3.2911877394636013) internal successors, (3436), 1075 states have internal predecessors, (3436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:04,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 3436 transitions. [2022-11-20 11:15:04,512 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 3436 transitions. Word has length 14 [2022-11-20 11:15:04,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:04,513 INFO L495 AbstractCegarLoop]: Abstraction has 1076 states and 3436 transitions. [2022-11-20 11:15:04,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:04,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 3436 transitions. [2022-11-20 11:15:04,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:15:04,514 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:04,514 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:04,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-20 11:15:04,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:15:04,726 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:15:04,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:04,726 INFO L85 PathProgramCache]: Analyzing trace with hash 544820369, now seen corresponding path program 1 times [2022-11-20 11:15:04,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:15:04,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [774926837] [2022-11-20 11:15:04,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:04,727 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:15:04,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:15:04,728 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:15:04,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:15:05,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:05,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 11:15:05,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:05,193 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:15:05,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:15:05,334 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 11:15:05,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 11:15:05,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:15:05,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 11:15:05,487 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:15:05,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 11:15:05,551 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-20 11:15:05,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 11:15:05,756 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 11:15:05,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:10,518 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 11:15:10,518 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:15:10,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [774926837] [2022-11-20 11:15:10,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [774926837] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:10,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:15:10,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 11:15:10,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606225515] [2022-11-20 11:15:10,519 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:10,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:15:10,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:15:10,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:15:10,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:15:10,520 INFO L87 Difference]: Start difference. First operand 1076 states and 3436 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:11,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:11,064 INFO L93 Difference]: Finished difference Result 1180 states and 3775 transitions. [2022-11-20 11:15:11,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 11:15:11,065 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 11:15:11,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:11,068 INFO L225 Difference]: With dead ends: 1180 [2022-11-20 11:15:11,068 INFO L226 Difference]: Without dead ends: 1180 [2022-11-20 11:15:11,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:15:11,068 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 21 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:11,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 44 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 132 Unchecked, 0.4s Time] [2022-11-20 11:15:11,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2022-11-20 11:15:11,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 1156. [2022-11-20 11:15:11,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1124 states have (on average 3.284697508896797) internal successors, (3692), 1155 states have internal predecessors, (3692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:11,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 3692 transitions. [2022-11-20 11:15:11,085 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 3692 transitions. Word has length 14 [2022-11-20 11:15:11,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:11,086 INFO L495 AbstractCegarLoop]: Abstraction has 1156 states and 3692 transitions. [2022-11-20 11:15:11,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:11,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 3692 transitions. [2022-11-20 11:15:11,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:15:11,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:11,087 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:11,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-11-20 11:15:11,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:15:11,298 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:15:11,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:11,299 INFO L85 PathProgramCache]: Analyzing trace with hash 544820794, now seen corresponding path program 1 times [2022-11-20 11:15:11,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:15:11,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [407817617] [2022-11-20 11:15:11,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:11,299 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:15:11,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:15:11,300 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:15:11,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:15:11,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:11,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 11:15:11,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:11,621 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 11:15:11,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:11,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-11-20 11:15:11,940 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 11:15:11,941 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:15:11,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [407817617] [2022-11-20 11:15:11,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [407817617] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:11,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:15:11,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-20 11:15:11,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215863488] [2022-11-20 11:15:11,943 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:11,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:15:11,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:15:11,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:15:11,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:15:11,944 INFO L87 Difference]: Start difference. First operand 1156 states and 3692 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 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 11:15:13,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:13,506 INFO L93 Difference]: Finished difference Result 1812 states and 5756 transitions. [2022-11-20 11:15:13,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:15:13,507 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 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 11:15:13,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:13,511 INFO L225 Difference]: With dead ends: 1812 [2022-11-20 11:15:13,511 INFO L226 Difference]: Without dead ends: 1812 [2022-11-20 11:15:13,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-11-20 11:15:13,511 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 350 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:13,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 32 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 11:15:13,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2022-11-20 11:15:13,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1265. [2022-11-20 11:15:13,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1233 states have (on average 3.6455798864557987) internal successors, (4495), 1264 states have internal predecessors, (4495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:13,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 4495 transitions. [2022-11-20 11:15:13,533 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 4495 transitions. Word has length 14 [2022-11-20 11:15:13,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:13,533 INFO L495 AbstractCegarLoop]: Abstraction has 1265 states and 4495 transitions. [2022-11-20 11:15:13,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 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 11:15:13,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 4495 transitions. [2022-11-20 11:15:13,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:15:13,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:13,535 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:13,546 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:15:13,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:15:13,743 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:15:13,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:13,744 INFO L85 PathProgramCache]: Analyzing trace with hash 544820619, now seen corresponding path program 1 times [2022-11-20 11:15:13,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:15:13,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1813687108] [2022-11-20 11:15:13,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:13,744 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:15:13,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:15:13,745 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:15:13,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:15:14,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:14,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 11:15:14,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:14,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 11:15:14,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 11:15:14,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:15:14,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 11:15:14,184 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:15:14,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 11:15:14,358 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 11:15:14,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:14,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:15:14,869 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 11:15:14,869 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:15:14,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1813687108] [2022-11-20 11:15:14,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1813687108] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:14,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:15:14,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 11:15:14,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784110447] [2022-11-20 11:15:14,870 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:14,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:15:14,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:15:14,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:15:14,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:15:14,872 INFO L87 Difference]: Start difference. First operand 1265 states and 4495 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:20,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:20,375 INFO L93 Difference]: Finished difference Result 1497 states and 5101 transitions. [2022-11-20 11:15:20,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 11:15:20,376 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 11:15:20,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:20,380 INFO L225 Difference]: With dead ends: 1497 [2022-11-20 11:15:20,380 INFO L226 Difference]: Without dead ends: 1497 [2022-11-20 11:15:20,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:15:20,380 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 51 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:20,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 48 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 215 Invalid, 0 Unknown, 73 Unchecked, 0.9s Time] [2022-11-20 11:15:20,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2022-11-20 11:15:20,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1345. [2022-11-20 11:15:20,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1313 states have (on average 3.6031987814166033) internal successors, (4731), 1344 states have internal predecessors, (4731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:20,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 4731 transitions. [2022-11-20 11:15:20,400 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 4731 transitions. Word has length 14 [2022-11-20 11:15:20,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:20,400 INFO L495 AbstractCegarLoop]: Abstraction has 1345 states and 4731 transitions. [2022-11-20 11:15:20,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:20,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 4731 transitions. [2022-11-20 11:15:20,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:15:20,401 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:20,401 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:20,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-20 11:15:20,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:15:20,615 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread3Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:15:20,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:20,615 INFO L85 PathProgramCache]: Analyzing trace with hash 544820797, now seen corresponding path program 1 times [2022-11-20 11:15:20,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:15:20,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2101541795] [2022-11-20 11:15:20,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:20,615 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:15:20,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:15:20,616 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:15:20,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:15:20,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:20,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 11:15:20,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:20,849 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 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 11:15:20,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:15:20,881 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:15:20,882 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:15:20,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2101541795] [2022-11-20 11:15:20,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2101541795] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:15:20,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:15:20,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:15:20,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523109721] [2022-11-20 11:15:20,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:15:20,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:15:20,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:15:20,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:15:20,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:15:20,883 INFO L87 Difference]: Start difference. First operand 1345 states and 4731 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 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 11:15:21,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:21,159 INFO L93 Difference]: Finished difference Result 1236 states and 4225 transitions. [2022-11-20 11:15:21,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:15:21,160 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 11:15:21,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:21,162 INFO L225 Difference]: With dead ends: 1236 [2022-11-20 11:15:21,163 INFO L226 Difference]: Without dead ends: 1236 [2022-11-20 11:15:21,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 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 11:15:21,163 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 56 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:21,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 3 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:15:21,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2022-11-20 11:15:21,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 1236. [2022-11-20 11:15:21,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1209 states have (on average 3.4946236559139785) internal successors, (4225), 1235 states have internal predecessors, (4225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:21,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 4225 transitions. [2022-11-20 11:15:21,180 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 4225 transitions. Word has length 14 [2022-11-20 11:15:21,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:21,180 INFO L495 AbstractCegarLoop]: Abstraction has 1236 states and 4225 transitions. [2022-11-20 11:15:21,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 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 11:15:21,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 4225 transitions. [2022-11-20 11:15:21,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:15:21,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:21,180 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:21,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:15:21,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:15:21,381 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:15:21,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:21,382 INFO L85 PathProgramCache]: Analyzing trace with hash 531154494, now seen corresponding path program 1 times [2022-11-20 11:15:21,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:15:21,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [444415122] [2022-11-20 11:15:21,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:21,382 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 11:15:21,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:15:21,383 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:15:21,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:15:21,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:21,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 11:15:21,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:21,801 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 11:15:21,801 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 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-20 11:15:21,837 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:15:21,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 24 [2022-11-20 11:15:21,874 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:15:21,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-20 11:15:21,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:15:21,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:15:21,979 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:15:21,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [444415122] [2022-11-20 11:15:21,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [444415122] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:15:21,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:15:21,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:15:21,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122142907] [2022-11-20 11:15:21,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:15:21,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:15:21,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:15:21,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:15:21,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:15:21,981 INFO L87 Difference]: Start difference. First operand 1236 states and 4225 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 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 11:15:22,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:22,219 INFO L93 Difference]: Finished difference Result 1232 states and 4216 transitions. [2022-11-20 11:15:22,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:15:22,221 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 11:15:22,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:22,224 INFO L225 Difference]: With dead ends: 1232 [2022-11-20 11:15:22,224 INFO L226 Difference]: Without dead ends: 1232 [2022-11-20 11:15:22,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:15:22,224 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 36 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:22,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 11 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 30 Unchecked, 0.2s Time] [2022-11-20 11:15:22,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2022-11-20 11:15:22,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 1232. [2022-11-20 11:15:22,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1205 states have (on average 3.4987551867219917) internal successors, (4216), 1231 states have internal predecessors, (4216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:22,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 4216 transitions. [2022-11-20 11:15:22,261 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 4216 transitions. Word has length 14 [2022-11-20 11:15:22,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:22,261 INFO L495 AbstractCegarLoop]: Abstraction has 1232 states and 4216 transitions. [2022-11-20 11:15:22,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 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 11:15:22,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 4216 transitions. [2022-11-20 11:15:22,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:15:22,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:22,263 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:22,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-20 11:15:22,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:15:22,475 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:15:22,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:22,476 INFO L85 PathProgramCache]: Analyzing trace with hash 646127822, now seen corresponding path program 3 times [2022-11-20 11:15:22,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:15:22,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [34970212] [2022-11-20 11:15:22,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:15:22,477 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:15:22,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:15:22,477 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:15:22,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:15:22,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 11:15:22,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:15:22,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 11:15:22,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:22,902 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:15:22,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:15:23,046 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 11:15:23,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 11:15:23,225 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 11:15:23,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-20 11:15:23,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-20 11:15:23,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:15:23,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 11:15:23,333 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:15:23,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 11:15:23,567 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 11:15:23,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:27,774 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:15:27,774 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:15:27,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [34970212] [2022-11-20 11:15:27,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [34970212] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:27,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:15:27,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:15:27,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593764688] [2022-11-20 11:15:27,775 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:27,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:15:27,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:15:27,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:15:27,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:15:27,776 INFO L87 Difference]: Start difference. First operand 1232 states and 4216 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 11:15:39,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:39,492 INFO L93 Difference]: Finished difference Result 2273 states and 7752 transitions. [2022-11-20 11:15:39,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:15:39,494 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 15 [2022-11-20 11:15:39,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:39,503 INFO L225 Difference]: With dead ends: 2273 [2022-11-20 11:15:39,504 INFO L226 Difference]: Without dead ends: 2249 [2022-11-20 11:15:39,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2022-11-20 11:15:39,505 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 364 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 510 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:39,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 167 Invalid, 1578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1045 Invalid, 0 Unknown, 510 Unchecked, 6.6s Time] [2022-11-20 11:15:39,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2249 states. [2022-11-20 11:15:39,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2249 to 1759. [2022-11-20 11:15:39,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1759 states, 1728 states have (on average 3.59375) internal successors, (6210), 1758 states have internal predecessors, (6210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:39,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1759 states to 1759 states and 6210 transitions. [2022-11-20 11:15:39,580 INFO L78 Accepts]: Start accepts. Automaton has 1759 states and 6210 transitions. Word has length 15 [2022-11-20 11:15:39,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:39,580 INFO L495 AbstractCegarLoop]: Abstraction has 1759 states and 6210 transitions. [2022-11-20 11:15:39,581 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 11:15:39,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1759 states and 6210 transitions. [2022-11-20 11:15:39,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:15:39,582 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:39,582 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:39,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-20 11:15:39,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:15:39,791 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:15:39,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:39,791 INFO L85 PathProgramCache]: Analyzing trace with hash 505132940, now seen corresponding path program 1 times [2022-11-20 11:15:39,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:15:39,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [629082022] [2022-11-20 11:15:39,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:39,792 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:15:39,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:15:39,793 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:15:39,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:15:40,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:40,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:15:40,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:40,202 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-20 11:15:40,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 41 [2022-11-20 11:15:40,246 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:15:40,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-20 11:15:40,299 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 11:15:40,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 31 [2022-11-20 11:15:40,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:15:40,573 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:15:40,573 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:15:40,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [629082022] [2022-11-20 11:15:40,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [629082022] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:15:40,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:15:40,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:15:40,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604634947] [2022-11-20 11:15:40,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:15:40,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:15:40,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:15:40,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:15:40,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:15:40,575 INFO L87 Difference]: Start difference. First operand 1759 states and 6210 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:40,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:40,809 INFO L93 Difference]: Finished difference Result 1719 states and 6091 transitions. [2022-11-20 11:15:40,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:15:40,810 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 11:15:40,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:40,816 INFO L225 Difference]: With dead ends: 1719 [2022-11-20 11:15:40,816 INFO L226 Difference]: Without dead ends: 1719 [2022-11-20 11:15:40,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:15:40,816 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 35 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:40,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 3 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:15:40,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2022-11-20 11:15:40,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1663. [2022-11-20 11:15:40,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1641 states have (on average 3.603900060938452) internal successors, (5914), 1662 states have internal predecessors, (5914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:40,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 5914 transitions. [2022-11-20 11:15:40,853 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 5914 transitions. Word has length 15 [2022-11-20 11:15:40,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:40,853 INFO L495 AbstractCegarLoop]: Abstraction has 1663 states and 5914 transitions. [2022-11-20 11:15:40,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:40,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 5914 transitions. [2022-11-20 11:15:40,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:15:40,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:40,855 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:40,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-20 11:15:41,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:15:41,069 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:15:41,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:41,069 INFO L85 PathProgramCache]: Analyzing trace with hash -290430689, now seen corresponding path program 1 times [2022-11-20 11:15:41,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:15:41,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1242548875] [2022-11-20 11:15:41,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:41,070 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:15:41,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:15:41,071 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:15:41,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:15:41,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:41,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 11:15:41,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:41,513 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:15:41,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:15:41,668 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 11:15:41,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 11:15:41,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:15:41,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 11:15:41,818 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:15:41,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 11:15:41,888 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-20 11:15:41,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 11:15:42,137 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 11:15:42,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:45,007 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 11:15:45,007 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:15:45,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1242548875] [2022-11-20 11:15:45,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1242548875] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:45,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:15:45,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 11:15:45,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865675247] [2022-11-20 11:15:45,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:45,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:15:45,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:15:45,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:15:45,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:15:45,013 INFO L87 Difference]: Start difference. First operand 1663 states and 5914 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:46,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:46,383 INFO L93 Difference]: Finished difference Result 1871 states and 6757 transitions. [2022-11-20 11:15:46,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 11:15:46,384 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 11:15:46,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:46,389 INFO L225 Difference]: With dead ends: 1871 [2022-11-20 11:15:46,389 INFO L226 Difference]: Without dead ends: 1871 [2022-11-20 11:15:46,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-11-20 11:15:46,389 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 84 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 332 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:46,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 59 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 201 Invalid, 0 Unknown, 332 Unchecked, 1.1s Time] [2022-11-20 11:15:46,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2022-11-20 11:15:46,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 1797. [2022-11-20 11:15:46,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1797 states, 1775 states have (on average 3.711549295774648) internal successors, (6588), 1796 states have internal predecessors, (6588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:46,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1797 states to 1797 states and 6588 transitions. [2022-11-20 11:15:46,423 INFO L78 Accepts]: Start accepts. Automaton has 1797 states and 6588 transitions. Word has length 15 [2022-11-20 11:15:46,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:46,423 INFO L495 AbstractCegarLoop]: Abstraction has 1797 states and 6588 transitions. [2022-11-20 11:15:46,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:46,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1797 states and 6588 transitions. [2022-11-20 11:15:46,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:15:46,424 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:46,425 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:46,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-20 11:15:46,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:15:46,638 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:15:46,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:46,638 INFO L85 PathProgramCache]: Analyzing trace with hash -290430439, now seen corresponding path program 1 times [2022-11-20 11:15:46,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:15:46,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1560811781] [2022-11-20 11:15:46,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:46,638 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:15:46,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:15:46,639 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:15:46,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:15:46,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:46,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 11:15:46,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:46,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 11:15:47,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 11:15:47,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:15:47,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 11:15:47,079 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:15:47,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 11:15:47,270 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 11:15:47,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:47,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:15:47,828 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 11:15:47,828 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:15:47,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1560811781] [2022-11-20 11:15:47,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1560811781] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:47,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:15:47,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 11:15:47,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716058045] [2022-11-20 11:15:47,829 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:47,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:15:47,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:15:47,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:15:47,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:15:47,829 INFO L87 Difference]: Start difference. First operand 1797 states and 6588 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:49,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:49,958 INFO L93 Difference]: Finished difference Result 2317 states and 8214 transitions. [2022-11-20 11:15:49,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 11:15:49,960 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 11:15:49,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:49,966 INFO L225 Difference]: With dead ends: 2317 [2022-11-20 11:15:49,966 INFO L226 Difference]: Without dead ends: 2317 [2022-11-20 11:15:49,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:15:49,966 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 98 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:49,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 86 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 316 Invalid, 0 Unknown, 185 Unchecked, 1.5s Time] [2022-11-20 11:15:49,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2022-11-20 11:15:49,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 1809. [2022-11-20 11:15:49,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1787 states have (on average 3.7112479015109123) internal successors, (6632), 1808 states have internal predecessors, (6632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:49,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 6632 transitions. [2022-11-20 11:15:49,996 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 6632 transitions. Word has length 15 [2022-11-20 11:15:49,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:49,997 INFO L495 AbstractCegarLoop]: Abstraction has 1809 states and 6632 transitions. [2022-11-20 11:15:49,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:49,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 6632 transitions. [2022-11-20 11:15:49,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:15:49,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:49,998 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:50,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:15:50,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:15:50,198 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:15:50,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:50,199 INFO L85 PathProgramCache]: Analyzing trace with hash -290423125, now seen corresponding path program 1 times [2022-11-20 11:15:50,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:15:50,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1520141220] [2022-11-20 11:15:50,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:15:50,199 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 11:15:50,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:15:50,200 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:15:50,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:15:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:15:50,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 11:15:50,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:50,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:15:50,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:50,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:15:50,788 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:15:50,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1520141220] [2022-11-20 11:15:50,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1520141220] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:50,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:15:50,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 11:15:50,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367812834] [2022-11-20 11:15:50,788 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:50,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:15:50,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:15:50,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:15:50,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:15:50,789 INFO L87 Difference]: Start difference. First operand 1809 states and 6632 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:52,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:52,858 INFO L93 Difference]: Finished difference Result 1761 states and 6212 transitions. [2022-11-20 11:15:52,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 11:15:52,860 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 11:15:52,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:52,864 INFO L225 Difference]: With dead ends: 1761 [2022-11-20 11:15:52,864 INFO L226 Difference]: Without dead ends: 1737 [2022-11-20 11:15:52,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:15:52,865 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 198 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:52,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 69 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-20 11:15:52,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1737 states. [2022-11-20 11:15:52,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1737 to 1689. [2022-11-20 11:15:52,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1689 states, 1668 states have (on average 3.620503597122302) internal successors, (6039), 1688 states have internal predecessors, (6039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:52,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 6039 transitions. [2022-11-20 11:15:52,904 INFO L78 Accepts]: Start accepts. Automaton has 1689 states and 6039 transitions. Word has length 15 [2022-11-20 11:15:52,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:52,904 INFO L495 AbstractCegarLoop]: Abstraction has 1689 states and 6039 transitions. [2022-11-20 11:15:52,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:52,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1689 states and 6039 transitions. [2022-11-20 11:15:52,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:15:52,906 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:52,906 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:52,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Ended with exit code 0 [2022-11-20 11:15:53,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:15:53,119 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:15:53,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:53,119 INFO L85 PathProgramCache]: Analyzing trace with hash -290147719, now seen corresponding path program 2 times [2022-11-20 11:15:53,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:15:53,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1383148639] [2022-11-20 11:15:53,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:15:53,120 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:15:53,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:15:53,121 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:15:53,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:15:53,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:15:53,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:15:53,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:15:53,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:53,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 11:15:53,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 11:15:53,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:15:53,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 11:15:53,436 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:15:53,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 11:15:53,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:15:53,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:15:53,569 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:15:53,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1383148639] [2022-11-20 11:15:53,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1383148639] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:15:53,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:15:53,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:15:53,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719354752] [2022-11-20 11:15:53,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:15:53,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:15:53,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:15:53,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:15:53,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:15:53,571 INFO L87 Difference]: Start difference. First operand 1689 states and 6039 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:54,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:54,031 INFO L93 Difference]: Finished difference Result 1881 states and 6313 transitions. [2022-11-20 11:15:54,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:15:54,032 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 11:15:54,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:54,037 INFO L225 Difference]: With dead ends: 1881 [2022-11-20 11:15:54,038 INFO L226 Difference]: Without dead ends: 1857 [2022-11-20 11:15:54,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:15:54,038 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 93 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:54,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 7 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:15:54,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1857 states. [2022-11-20 11:15:54,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1857 to 1527. [2022-11-20 11:15:54,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1507 states have (on average 3.551426675514267) internal successors, (5352), 1526 states have internal predecessors, (5352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:54,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 5352 transitions. [2022-11-20 11:15:54,091 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 5352 transitions. Word has length 15 [2022-11-20 11:15:54,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:54,091 INFO L495 AbstractCegarLoop]: Abstraction has 1527 states and 5352 transitions. [2022-11-20 11:15:54,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:54,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 5352 transitions. [2022-11-20 11:15:54,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:15:54,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:54,093 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:54,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:15:54,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:15:54,299 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:15:54,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:54,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1634673167, now seen corresponding path program 2 times [2022-11-20 11:15:54,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:15:54,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1922664435] [2022-11-20 11:15:54,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:15:54,300 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:15:54,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:15:54,301 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:15:54,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:15:54,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:15:54,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:15:54,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:15:54,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:54,688 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:15:54,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:15:54,839 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 11:15:54,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 11:15:54,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:15:54,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 11:15:54,955 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:15:54,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 11:15:55,010 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-20 11:15:55,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 11:15:55,134 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 11:15:55,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:15:55,134 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:15:55,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1922664435] [2022-11-20 11:15:55,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1922664435] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:15:55,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:15:55,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:15:55,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237668449] [2022-11-20 11:15:55,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:15:55,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:15:55,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:15:55,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:15:55,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:15:55,136 INFO L87 Difference]: Start difference. First operand 1527 states and 5352 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 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 11:15:55,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:55,599 INFO L93 Difference]: Finished difference Result 1633 states and 5514 transitions. [2022-11-20 11:15:55,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:15:55,601 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 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 16 [2022-11-20 11:15:55,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:55,605 INFO L225 Difference]: With dead ends: 1633 [2022-11-20 11:15:55,605 INFO L226 Difference]: Without dead ends: 1533 [2022-11-20 11:15:55,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 1 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 11:15:55,606 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 79 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:55,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 7 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:15:55,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2022-11-20 11:15:55,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1244. [2022-11-20 11:15:55,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1225 states have (on average 3.507755102040816) internal successors, (4297), 1243 states have internal predecessors, (4297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:55,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 4297 transitions. [2022-11-20 11:15:55,636 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 4297 transitions. Word has length 16 [2022-11-20 11:15:55,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:55,637 INFO L495 AbstractCegarLoop]: Abstraction has 1244 states and 4297 transitions. [2022-11-20 11:15:55,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 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 11:15:55,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 4297 transitions. [2022-11-20 11:15:55,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:15:55,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:55,638 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:55,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-11-20 11:15:55,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:15:55,850 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:15:55,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:55,851 INFO L85 PathProgramCache]: Analyzing trace with hash -980057584, now seen corresponding path program 2 times [2022-11-20 11:15:55,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:15:55,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1631796672] [2022-11-20 11:15:55,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:15:55,851 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:15:55,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:15:55,852 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:15:55,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:15:56,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:15:56,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:15:56,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 11:15:56,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:56,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 11:15:56,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:15:56,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:15:56,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:15:56,239 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:15:56,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 11:15:56,347 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:15:56,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:15:57,267 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:15:57,267 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:15:57,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1631796672] [2022-11-20 11:15:57,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1631796672] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:15:57,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:15:57,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-20 11:15:57,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84551733] [2022-11-20 11:15:57,268 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:15:57,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:15:57,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:15:57,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:15:57,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:15:57,269 INFO L87 Difference]: Start difference. First operand 1244 states and 4297 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:59,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:15:59,082 INFO L93 Difference]: Finished difference Result 1646 states and 5748 transitions. [2022-11-20 11:15:59,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:15:59,084 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 11:15:59,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:15:59,087 INFO L225 Difference]: With dead ends: 1646 [2022-11-20 11:15:59,087 INFO L226 Difference]: Without dead ends: 1646 [2022-11-20 11:15:59,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-11-20 11:15:59,088 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 109 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:15:59,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 71 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 452 Invalid, 0 Unknown, 178 Unchecked, 1.8s Time] [2022-11-20 11:15:59,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2022-11-20 11:15:59,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1418. [2022-11-20 11:15:59,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1418 states, 1399 states have (on average 3.68048606147248) internal successors, (5149), 1417 states have internal predecessors, (5149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:59,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 5149 transitions. [2022-11-20 11:15:59,117 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 5149 transitions. Word has length 16 [2022-11-20 11:15:59,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:15:59,117 INFO L495 AbstractCegarLoop]: Abstraction has 1418 states and 5149 transitions. [2022-11-20 11:15:59,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:15:59,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 5149 transitions. [2022-11-20 11:15:59,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 11:15:59,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:15:59,119 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:15:59,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 11:15:59,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:15:59,332 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:15:59,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:15:59,332 INFO L85 PathProgramCache]: Analyzing trace with hash -317001667, now seen corresponding path program 3 times [2022-11-20 11:15:59,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:15:59,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [989433200] [2022-11-20 11:15:59,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:15:59,333 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:15:59,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:15:59,333 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:15:59,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:15:59,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 11:15:59,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:15:59,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 11:15:59,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:15:59,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 11:15:59,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 11:15:59,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:15:59,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-11-20 11:15:59,817 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:15:59,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 11:16:00,120 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 11:16:00,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:16:01,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:16:03,036 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:16:03,037 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:16:03,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [989433200] [2022-11-20 11:16:03,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [989433200] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:16:03,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:16:03,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 11:16:03,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750299588] [2022-11-20 11:16:03,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:16:03,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:16:03,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:16:03,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:16:03,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:16:03,038 INFO L87 Difference]: Start difference. First operand 1418 states and 5149 transitions. Second operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:09,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:16:09,134 INFO L93 Difference]: Finished difference Result 3058 states and 11563 transitions. [2022-11-20 11:16:09,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:16:09,137 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 11:16:09,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:16:09,144 INFO L225 Difference]: With dead ends: 3058 [2022-11-20 11:16:09,144 INFO L226 Difference]: Without dead ends: 3058 [2022-11-20 11:16:09,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2022-11-20 11:16:09,144 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 206 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:16:09,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 135 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 584 Invalid, 0 Unknown, 62 Unchecked, 4.7s Time] [2022-11-20 11:16:09,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3058 states. [2022-11-20 11:16:09,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3058 to 2286. [2022-11-20 11:16:09,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2286 states, 2267 states have (on average 3.9942655491839436) internal successors, (9055), 2285 states have internal predecessors, (9055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:09,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2286 states to 2286 states and 9055 transitions. [2022-11-20 11:16:09,194 INFO L78 Accepts]: Start accepts. Automaton has 2286 states and 9055 transitions. Word has length 17 [2022-11-20 11:16:09,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:16:09,194 INFO L495 AbstractCegarLoop]: Abstraction has 2286 states and 9055 transitions. [2022-11-20 11:16:09,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:09,194 INFO L276 IsEmpty]: Start isEmpty. Operand 2286 states and 9055 transitions. [2022-11-20 11:16:09,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 11:16:09,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:16:09,195 INFO L195 NwaCegarLoop]: trace histogram [12, 2, 1, 1, 1] [2022-11-20 11:16:09,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:16:09,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:16:09,409 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:16:09,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:16:09,410 INFO L85 PathProgramCache]: Analyzing trace with hash -750632946, now seen corresponding path program 2 times [2022-11-20 11:16:09,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:16:09,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1998511065] [2022-11-20 11:16:09,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:16:09,410 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 11:16:09,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:16:09,413 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:16:09,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:16:09,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:16:09,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:16:09,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-20 11:16:09,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:16:09,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 11:16:10,167 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 40 proven. 31 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 11:16:10,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:16:13,773 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:16:13,774 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:16:13,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1998511065] [2022-11-20 11:16:13,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1998511065] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:16:13,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:16:13,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 28 [2022-11-20 11:16:13,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978142903] [2022-11-20 11:16:13,774 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:16:13,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-20 11:16:13,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:16:13,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-20 11:16:13,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2022-11-20 11:16:13,776 INFO L87 Difference]: Start difference. First operand 2286 states and 9055 transitions. Second operand has 29 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:28,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:16:28,274 INFO L93 Difference]: Finished difference Result 6244 states and 25613 transitions. [2022-11-20 11:16:28,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 11:16:28,276 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 11:16:28,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:16:28,292 INFO L225 Difference]: With dead ends: 6244 [2022-11-20 11:16:28,293 INFO L226 Difference]: Without dead ends: 6244 [2022-11-20 11:16:28,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=227, Invalid=1179, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 11:16:28,293 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 272 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 1460 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 1692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:16:28,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 162 Invalid, 1692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1460 Invalid, 0 Unknown, 161 Unchecked, 12.6s Time] [2022-11-20 11:16:28,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6244 states. [2022-11-20 11:16:28,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6244 to 2292. [2022-11-20 11:16:28,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2292 states, 2273 states have (on average 3.986801583809943) internal successors, (9062), 2291 states have internal predecessors, (9062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:28,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2292 states to 2292 states and 9062 transitions. [2022-11-20 11:16:28,374 INFO L78 Accepts]: Start accepts. Automaton has 2292 states and 9062 transitions. Word has length 17 [2022-11-20 11:16:28,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:16:28,374 INFO L495 AbstractCegarLoop]: Abstraction has 2292 states and 9062 transitions. [2022-11-20 11:16:28,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:28,374 INFO L276 IsEmpty]: Start isEmpty. Operand 2292 states and 9062 transitions. [2022-11-20 11:16:28,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 11:16:28,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:16:28,376 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:16:28,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:16:28,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:16:28,587 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:16:28,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:16:28,588 INFO L85 PathProgramCache]: Analyzing trace with hash -813611155, now seen corresponding path program 2 times [2022-11-20 11:16:28,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:16:28,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1805364585] [2022-11-20 11:16:28,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:16:28,588 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 11:16:28,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:16:28,589 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:16:28,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:16:28,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:16:28,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:16:28,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 11:16:28,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:16:29,115 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:16:29,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:16:29,263 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 11:16:29,263 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 15 treesize of output 50 [2022-11-20 11:16:29,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:16:29,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 11:16:29,386 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 11:16:29,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-20 11:16:29,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:16:29,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 11:16:29,478 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:16:29,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 11:16:29,645 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 11:16:29,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:16:32,719 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 11:16:32,719 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:16:32,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1805364585] [2022-11-20 11:16:32,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1805364585] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:16:32,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:16:32,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 11:16:32,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903184962] [2022-11-20 11:16:32,720 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:16:32,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:16:32,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:16:32,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:16:32,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:16:32,721 INFO L87 Difference]: Start difference. First operand 2292 states and 9062 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:34,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:16:34,597 INFO L93 Difference]: Finished difference Result 4760 states and 19765 transitions. [2022-11-20 11:16:34,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:16:34,599 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-20 11:16:34,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:16:34,612 INFO L225 Difference]: With dead ends: 4760 [2022-11-20 11:16:34,612 INFO L226 Difference]: Without dead ends: 4760 [2022-11-20 11:16:34,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:16:34,613 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 258 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:16:34,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 26 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 197 Invalid, 0 Unknown, 43 Unchecked, 1.4s Time] [2022-11-20 11:16:34,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4760 states. [2022-11-20 11:16:34,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4760 to 3024. [2022-11-20 11:16:34,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3024 states, 3005 states have (on average 4.760732113144758) internal successors, (14306), 3023 states have internal predecessors, (14306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:34,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3024 states to 3024 states and 14306 transitions. [2022-11-20 11:16:34,742 INFO L78 Accepts]: Start accepts. Automaton has 3024 states and 14306 transitions. Word has length 18 [2022-11-20 11:16:34,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:16:34,742 INFO L495 AbstractCegarLoop]: Abstraction has 3024 states and 14306 transitions. [2022-11-20 11:16:34,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:34,742 INFO L276 IsEmpty]: Start isEmpty. Operand 3024 states and 14306 transitions. [2022-11-20 11:16:34,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 11:16:34,744 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:16:34,744 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:16:34,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:16:34,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:16:34,955 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:16:34,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:16:34,956 INFO L85 PathProgramCache]: Analyzing trace with hash -813610730, now seen corresponding path program 1 times [2022-11-20 11:16:34,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:16:34,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2087859019] [2022-11-20 11:16:34,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:16:34,956 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 11:16:34,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:16:34,957 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:16:34,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:16:35,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:35,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 11:16:35,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:16:35,460 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:16:35,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:16:35,862 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 27 treesize of output 23 [2022-11-20 11:16:36,076 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:16:36,076 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:16:36,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2087859019] [2022-11-20 11:16:36,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2087859019] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:16:36,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:16:36,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-20 11:16:36,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684125512] [2022-11-20 11:16:36,077 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:16:36,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:16:36,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:16:36,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:16:36,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:16:36,077 INFO L87 Difference]: Start difference. First operand 3024 states and 14306 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:40,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:16:40,121 INFO L93 Difference]: Finished difference Result 10634 states and 47547 transitions. [2022-11-20 11:16:40,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 11:16:40,123 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-20 11:16:40,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:16:40,201 INFO L225 Difference]: With dead ends: 10634 [2022-11-20 11:16:40,201 INFO L226 Difference]: Without dead ends: 10634 [2022-11-20 11:16:40,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2022-11-20 11:16:40,201 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 564 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:16:40,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 96 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-20 11:16:40,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10634 states. [2022-11-20 11:16:40,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10634 to 3024. [2022-11-20 11:16:40,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3024 states, 3005 states have (on average 4.679534109816972) internal successors, (14062), 3023 states have internal predecessors, (14062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:40,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3024 states to 3024 states and 14062 transitions. [2022-11-20 11:16:40,353 INFO L78 Accepts]: Start accepts. Automaton has 3024 states and 14062 transitions. Word has length 18 [2022-11-20 11:16:40,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:16:40,353 INFO L495 AbstractCegarLoop]: Abstraction has 3024 states and 14062 transitions. [2022-11-20 11:16:40,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:40,353 INFO L276 IsEmpty]: Start isEmpty. Operand 3024 states and 14062 transitions. [2022-11-20 11:16:40,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 11:16:40,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:16:40,354 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:16:40,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 11:16:40,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:16:40,555 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:16:40,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:16:40,556 INFO L85 PathProgramCache]: Analyzing trace with hash -813610905, now seen corresponding path program 1 times [2022-11-20 11:16:40,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:16:40,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [810770587] [2022-11-20 11:16:40,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:16:40,556 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:16:40,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:16:40,557 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:16:40,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:16:41,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:16:41,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 11:16:41,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:16:41,160 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:16:41,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:16:41,311 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-20 11:16:41,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2022-11-20 11:16:41,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 11:16:41,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:16:41,493 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-20 11:16:41,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2022-11-20 11:16:41,512 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:16:41,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 11:16:41,821 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:16:41,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:16:44,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-20 11:16:44,871 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:16:44,871 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:16:44,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [810770587] [2022-11-20 11:16:44,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [810770587] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:16:44,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:16:44,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 11:16:44,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536722300] [2022-11-20 11:16:44,872 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:16:44,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:16:44,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:16:44,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:16:44,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:16:44,873 INFO L87 Difference]: Start difference. First operand 3024 states and 14062 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:46,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:16:46,588 INFO L93 Difference]: Finished difference Result 7106 states and 35421 transitions. [2022-11-20 11:16:46,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 11:16:46,591 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-20 11:16:46,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:16:46,612 INFO L225 Difference]: With dead ends: 7106 [2022-11-20 11:16:46,613 INFO L226 Difference]: Without dead ends: 7106 [2022-11-20 11:16:46,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:16:46,613 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 130 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 489 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:16:46,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 90 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 0 Unknown, 489 Unchecked, 1.2s Time] [2022-11-20 11:16:46,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7106 states. [2022-11-20 11:16:46,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7106 to 3854. [2022-11-20 11:16:46,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3854 states, 3835 states have (on average 4.6860495436766625) internal successors, (17971), 3853 states have internal predecessors, (17971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:46,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3854 states to 3854 states and 17971 transitions. [2022-11-20 11:16:46,717 INFO L78 Accepts]: Start accepts. Automaton has 3854 states and 17971 transitions. Word has length 18 [2022-11-20 11:16:46,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:16:46,718 INFO L495 AbstractCegarLoop]: Abstraction has 3854 states and 17971 transitions. [2022-11-20 11:16:46,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:46,718 INFO L276 IsEmpty]: Start isEmpty. Operand 3854 states and 17971 transitions. [2022-11-20 11:16:46,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 11:16:46,719 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:16:46,719 INFO L195 NwaCegarLoop]: trace histogram [13, 3, 1, 1, 1] [2022-11-20 11:16:46,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:16:46,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:16:46,934 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:16:46,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:16:46,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1310761072, now seen corresponding path program 3 times [2022-11-20 11:16:46,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:16:46,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1728439990] [2022-11-20 11:16:46,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:16:46,936 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:16:46,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:16:46,937 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:16:46,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:16:47,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-20 11:16:47,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:16:47,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 11:16:47,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:16:47,481 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:16:47,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:16:47,605 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 11:16:47,758 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 40 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 11:16:47,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:16:48,485 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 40 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 11:16:48,486 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:16:48,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1728439990] [2022-11-20 11:16:48,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1728439990] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:16:48,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:16:48,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-11-20 11:16:48,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623182781] [2022-11-20 11:16:48,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:16:48,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:16:48,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:16:48,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:16:48,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:16:48,487 INFO L87 Difference]: Start difference. First operand 3854 states and 17971 transitions. Second operand has 18 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:52,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:16:52,871 INFO L93 Difference]: Finished difference Result 10880 states and 52228 transitions. [2022-11-20 11:16:52,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:16:52,874 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-20 11:16:52,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:16:52,910 INFO L225 Difference]: With dead ends: 10880 [2022-11-20 11:16:52,911 INFO L226 Difference]: Without dead ends: 10880 [2022-11-20 11:16:52,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2022-11-20 11:16:52,911 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 495 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:16:52,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 111 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1096 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-20 11:16:52,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10880 states. [2022-11-20 11:16:53,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10880 to 3868. [2022-11-20 11:16:53,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3868 states, 3849 states have (on average 4.673161860223435) internal successors, (17987), 3867 states have internal predecessors, (17987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:53,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3868 states to 3868 states and 17987 transitions. [2022-11-20 11:16:53,099 INFO L78 Accepts]: Start accepts. Automaton has 3868 states and 17987 transitions. Word has length 19 [2022-11-20 11:16:53,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:16:53,099 INFO L495 AbstractCegarLoop]: Abstraction has 3868 states and 17987 transitions. [2022-11-20 11:16:53,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:16:53,099 INFO L276 IsEmpty]: Start isEmpty. Operand 3868 states and 17987 transitions. [2022-11-20 11:16:53,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 11:16:53,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:16:53,101 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:16:53,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2022-11-20 11:16:53,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:16:53,318 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:16:53,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:16:53,319 INFO L85 PathProgramCache]: Analyzing trace with hash 363578446, now seen corresponding path program 4 times [2022-11-20 11:16:53,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:16:53,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [975212161] [2022-11-20 11:16:53,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:16:53,319 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:16:53,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:16:53,320 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:16:53,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:16:53,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:16:53,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:16:53,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:16:53,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:16:53,899 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:16:53,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:16:53,978 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 11:16:54,223 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 11:16:54,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:16:54,656 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 11:16:54,656 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:16:54,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [975212161] [2022-11-20 11:16:54,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [975212161] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:16:54,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:16:54,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-20 11:16:54,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028522637] [2022-11-20 11:16:54,657 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:16:54,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:16:54,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:16:54,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:16:54,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:16:54,658 INFO L87 Difference]: Start difference. First operand 3868 states and 17987 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:00,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:17:00,670 INFO L93 Difference]: Finished difference Result 5848 states and 26384 transitions. [2022-11-20 11:17:00,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 11:17:00,672 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-20 11:17:00,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:17:00,689 INFO L225 Difference]: With dead ends: 5848 [2022-11-20 11:17:00,690 INFO L226 Difference]: Without dead ends: 5848 [2022-11-20 11:17:00,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2022-11-20 11:17:00,690 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 437 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 1438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:17:00,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 198 Invalid, 1438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1390 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-11-20 11:17:00,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5848 states. [2022-11-20 11:17:00,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5848 to 5172. [2022-11-20 11:17:00,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5172 states, 5153 states have (on average 4.637492722685814) internal successors, (23897), 5171 states have internal predecessors, (23897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:00,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5172 states to 5172 states and 23897 transitions. [2022-11-20 11:17:00,791 INFO L78 Accepts]: Start accepts. Automaton has 5172 states and 23897 transitions. Word has length 19 [2022-11-20 11:17:00,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:17:00,791 INFO L495 AbstractCegarLoop]: Abstraction has 5172 states and 23897 transitions. [2022-11-20 11:17:00,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:00,791 INFO L276 IsEmpty]: Start isEmpty. Operand 5172 states and 23897 transitions. [2022-11-20 11:17:00,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 11:17:00,792 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:17:00,793 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:17:00,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:17:00,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:17:00,993 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:17:00,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:17:00,993 INFO L85 PathProgramCache]: Analyzing trace with hash 547873016, now seen corresponding path program 2 times [2022-11-20 11:17:00,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:17:00,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1665101637] [2022-11-20 11:17:00,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:17:00,994 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:17:00,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:17:00,995 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:17:00,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:17:01,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:17:01,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:17:01,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 11:17:01,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:17:01,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 11:17:01,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 11:17:01,385 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:17:01,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 11:17:01,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 11:17:01,699 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 11:17:01,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:17:01,700 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:17:01,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1665101637] [2022-11-20 11:17:01,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1665101637] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:17:01,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:17:01,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:17:01,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650874308] [2022-11-20 11:17:01,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:17:01,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:17:01,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:17:01,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:17:01,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:17:01,701 INFO L87 Difference]: Start difference. First operand 5172 states and 23897 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:01,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:17:01,901 INFO L93 Difference]: Finished difference Result 5161 states and 23829 transitions. [2022-11-20 11:17:01,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:17:01,902 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-20 11:17:01,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:17:01,917 INFO L225 Difference]: With dead ends: 5161 [2022-11-20 11:17:01,917 INFO L226 Difference]: Without dead ends: 5161 [2022-11-20 11:17:01,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:17:01,918 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:17:01,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 12 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 48 Unchecked, 0.1s Time] [2022-11-20 11:17:01,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5161 states. [2022-11-20 11:17:01,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5161 to 5160. [2022-11-20 11:17:01,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5160 states, 5141 states have (on average 4.634312390585489) internal successors, (23825), 5159 states have internal predecessors, (23825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:02,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5160 states to 5160 states and 23825 transitions. [2022-11-20 11:17:02,010 INFO L78 Accepts]: Start accepts. Automaton has 5160 states and 23825 transitions. Word has length 19 [2022-11-20 11:17:02,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:17:02,010 INFO L495 AbstractCegarLoop]: Abstraction has 5160 states and 23825 transitions. [2022-11-20 11:17:02,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:02,010 INFO L276 IsEmpty]: Start isEmpty. Operand 5160 states and 23825 transitions. [2022-11-20 11:17:02,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 11:17:02,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:17:02,011 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:17:02,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 11:17:02,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:17:02,212 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:17:02,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:17:02,212 INFO L85 PathProgramCache]: Analyzing trace with hash 547872841, now seen corresponding path program 2 times [2022-11-20 11:17:02,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:17:02,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1410730660] [2022-11-20 11:17:02,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:17:02,213 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 11:17:02,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:17:02,214 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:17:02,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:17:02,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:17:02,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:17:02,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 11:17:02,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:17:02,689 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:17:02,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:17:02,836 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 11:17:02,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 11:17:02,928 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 11:17:02,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-20 11:17:02,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 11:17:03,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:17:03,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:17:03,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-11-20 11:17:03,107 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-20 11:17:03,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-20 11:17:03,629 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 11:17:03,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:17:03,630 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:17:03,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1410730660] [2022-11-20 11:17:03,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1410730660] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:17:03,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:17:03,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:17:03,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892338155] [2022-11-20 11:17:03,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:17:03,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:17:03,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:17:03,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:17:03,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:17:03,631 INFO L87 Difference]: Start difference. First operand 5160 states and 23825 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:03,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:17:03,957 INFO L93 Difference]: Finished difference Result 5149 states and 23745 transitions. [2022-11-20 11:17:03,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:17:03,959 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-20 11:17:03,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:17:03,976 INFO L225 Difference]: With dead ends: 5149 [2022-11-20 11:17:03,977 INFO L226 Difference]: Without dead ends: 5149 [2022-11-20 11:17:03,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:17:03,977 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:17:03,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 12 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 32 Unchecked, 0.2s Time] [2022-11-20 11:17:03,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5149 states. [2022-11-20 11:17:04,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5149 to 5148. [2022-11-20 11:17:04,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5148 states, 5129 states have (on average 4.628777539481381) internal successors, (23741), 5147 states have internal predecessors, (23741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:04,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5148 states to 5148 states and 23741 transitions. [2022-11-20 11:17:04,107 INFO L78 Accepts]: Start accepts. Automaton has 5148 states and 23741 transitions. Word has length 19 [2022-11-20 11:17:04,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:17:04,107 INFO L495 AbstractCegarLoop]: Abstraction has 5148 states and 23741 transitions. [2022-11-20 11:17:04,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:04,107 INFO L276 IsEmpty]: Start isEmpty. Operand 5148 states and 23741 transitions. [2022-11-20 11:17:04,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 11:17:04,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:17:04,108 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:17:04,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Ended with exit code 0 [2022-11-20 11:17:04,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:17:04,311 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:17:04,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:17:04,312 INFO L85 PathProgramCache]: Analyzing trace with hash 451374652, now seen corresponding path program 1 times [2022-11-20 11:17:04,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:17:04,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1307287158] [2022-11-20 11:17:04,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:17:04,312 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:17:04,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:17:04,314 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:17:04,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:17:04,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:04,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:17:04,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:17:04,855 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:17:04,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:17:04,940 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 15 treesize of output 11 [2022-11-20 11:17:05,207 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:17:05,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:17:05,649 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 11:17:05,649 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:17:05,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1307287158] [2022-11-20 11:17:05,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1307287158] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:17:05,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:17:05,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-20 11:17:05,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706587659] [2022-11-20 11:17:05,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:17:05,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:17:05,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:17:05,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:17:05,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:17:05,652 INFO L87 Difference]: Start difference. First operand 5148 states and 23741 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:11,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:17:11,321 INFO L93 Difference]: Finished difference Result 5334 states and 23362 transitions. [2022-11-20 11:17:11,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 11:17:11,323 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-20 11:17:11,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:17:11,337 INFO L225 Difference]: With dead ends: 5334 [2022-11-20 11:17:11,337 INFO L226 Difference]: Without dead ends: 5334 [2022-11-20 11:17:11,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2022-11-20 11:17:11,338 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 404 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:17:11,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 150 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1094 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-11-20 11:17:11,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5334 states. [2022-11-20 11:17:11,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5334 to 4680. [2022-11-20 11:17:11,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4680 states, 4661 states have (on average 4.509976399914182) internal successors, (21021), 4679 states have internal predecessors, (21021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:11,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4680 states to 4680 states and 21021 transitions. [2022-11-20 11:17:11,442 INFO L78 Accepts]: Start accepts. Automaton has 4680 states and 21021 transitions. Word has length 19 [2022-11-20 11:17:11,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:17:11,442 INFO L495 AbstractCegarLoop]: Abstraction has 4680 states and 21021 transitions. [2022-11-20 11:17:11,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:11,443 INFO L276 IsEmpty]: Start isEmpty. Operand 4680 states and 21021 transitions. [2022-11-20 11:17:11,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 11:17:11,444 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:17:11,444 INFO L195 NwaCegarLoop]: trace histogram [13, 4, 1, 1, 1] [2022-11-20 11:17:11,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:17:11,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:17:11,655 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:17:11,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:17:11,656 INFO L85 PathProgramCache]: Analyzing trace with hash 808829413, now seen corresponding path program 4 times [2022-11-20 11:17:11,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:17:11,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [668038289] [2022-11-20 11:17:11,656 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:17:11,656 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 11:17:11,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:17:11,657 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:17:11,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:17:11,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:17:11,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:17:11,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 11:17:11,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:17:12,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 11:17:12,668 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 48 proven. 38 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 11:17:12,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:17:17,546 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:17:17,547 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:17:17,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [668038289] [2022-11-20 11:17:17,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [668038289] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:17:17,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:17:17,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19] total 33 [2022-11-20 11:17:17,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706990339] [2022-11-20 11:17:17,547 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:17:17,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 11:17:17,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:17:17,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 11:17:17,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=979, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:17:17,548 INFO L87 Difference]: Start difference. First operand 4680 states and 21021 transitions. Second operand has 34 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:43,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:17:43,661 INFO L93 Difference]: Finished difference Result 21121 states and 99028 transitions. [2022-11-20 11:17:43,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-20 11:17:43,664 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-20 11:17:43,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:17:43,770 INFO L225 Difference]: With dead ends: 21121 [2022-11-20 11:17:43,770 INFO L226 Difference]: Without dead ends: 21121 [2022-11-20 11:17:43,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=449, Invalid=2413, Unknown=0, NotChecked=0, Total=2862 [2022-11-20 11:17:43,771 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 663 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 2712 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 3222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 2712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 333 IncrementalHoareTripleChecker+Unchecked, 20.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:17:43,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [663 Valid, 342 Invalid, 3222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 2712 Invalid, 0 Unknown, 333 Unchecked, 20.3s Time] [2022-11-20 11:17:43,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21121 states. [2022-11-20 11:17:44,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21121 to 4685. [2022-11-20 11:17:44,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4685 states, 4666 states have (on average 4.506643806258037) internal successors, (21028), 4684 states have internal predecessors, (21028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:44,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4685 states to 4685 states and 21028 transitions. [2022-11-20 11:17:44,129 INFO L78 Accepts]: Start accepts. Automaton has 4685 states and 21028 transitions. Word has length 20 [2022-11-20 11:17:44,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:17:44,130 INFO L495 AbstractCegarLoop]: Abstraction has 4685 states and 21028 transitions. [2022-11-20 11:17:44,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:44,130 INFO L276 IsEmpty]: Start isEmpty. Operand 4685 states and 21028 transitions. [2022-11-20 11:17:44,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 11:17:44,131 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:17:44,132 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:17:44,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2022-11-20 11:17:44,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:17:44,332 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:17:44,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:17:44,333 INFO L85 PathProgramCache]: Analyzing trace with hash -203072822, now seen corresponding path program 1 times [2022-11-20 11:17:44,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:17:44,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [264324715] [2022-11-20 11:17:44,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:17:44,333 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:17:44,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:17:44,337 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:17:44,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:17:44,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:44,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:17:44,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:17:44,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 11:17:45,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 11:17:45,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:17:46,272 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 11:17:46,272 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:17:46,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [264324715] [2022-11-20 11:17:46,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [264324715] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:17:46,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:17:46,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 11:17:46,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335226915] [2022-11-20 11:17:46,276 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:17:46,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:17:46,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:17:46,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:17:46,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:17:46,277 INFO L87 Difference]: Start difference. First operand 4685 states and 21028 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:50,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:17:50,832 INFO L93 Difference]: Finished difference Result 8859 states and 35210 transitions. [2022-11-20 11:17:50,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:17:50,834 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-20 11:17:50,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:17:50,869 INFO L225 Difference]: With dead ends: 8859 [2022-11-20 11:17:50,870 INFO L226 Difference]: Without dead ends: 8859 [2022-11-20 11:17:50,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:17:50,870 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 451 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:17:50,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 31 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-20 11:17:50,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8859 states. [2022-11-20 11:17:51,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8859 to 5285. [2022-11-20 11:17:51,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5285 states, 5266 states have (on average 4.6737561716673) internal successors, (24612), 5284 states have internal predecessors, (24612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:51,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5285 states to 5285 states and 24612 transitions. [2022-11-20 11:17:51,063 INFO L78 Accepts]: Start accepts. Automaton has 5285 states and 24612 transitions. Word has length 20 [2022-11-20 11:17:51,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:17:51,063 INFO L495 AbstractCegarLoop]: Abstraction has 5285 states and 24612 transitions. [2022-11-20 11:17:51,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:51,063 INFO L276 IsEmpty]: Start isEmpty. Operand 5285 states and 24612 transitions. [2022-11-20 11:17:51,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 11:17:51,064 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:17:51,064 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:17:51,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:17:51,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:17:51,265 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:17:51,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:17:51,265 INFO L85 PathProgramCache]: Analyzing trace with hash -203072997, now seen corresponding path program 1 times [2022-11-20 11:17:51,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:17:51,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1648293026] [2022-11-20 11:17:51,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:17:51,266 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:17:51,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:17:51,267 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:17:51,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:17:51,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:51,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:17:51,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:17:51,928 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:17:51,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:17:52,007 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 11:17:52,332 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 11:17:52,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:17:52,749 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 11:17:52,750 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:17:52,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1648293026] [2022-11-20 11:17:52,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1648293026] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:17:52,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:17:52,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 11:17:52,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098113547] [2022-11-20 11:17:52,751 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:17:52,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:17:52,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:17:52,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:17:52,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:17:52,752 INFO L87 Difference]: Start difference. First operand 5285 states and 24612 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:57,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:17:57,258 INFO L93 Difference]: Finished difference Result 5071 states and 22898 transitions. [2022-11-20 11:17:57,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 11:17:57,260 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-20 11:17:57,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:17:57,276 INFO L225 Difference]: With dead ends: 5071 [2022-11-20 11:17:57,276 INFO L226 Difference]: Without dead ends: 5071 [2022-11-20 11:17:57,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2022-11-20 11:17:57,277 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 492 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:17:57,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [492 Valid, 182 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1182 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-20 11:17:57,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5071 states. [2022-11-20 11:17:57,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5071 to 4947. [2022-11-20 11:17:57,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4947 states, 4928 states have (on average 4.594358766233766) internal successors, (22641), 4946 states have internal predecessors, (22641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:57,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4947 states to 4947 states and 22641 transitions. [2022-11-20 11:17:57,431 INFO L78 Accepts]: Start accepts. Automaton has 4947 states and 22641 transitions. Word has length 20 [2022-11-20 11:17:57,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:17:57,431 INFO L495 AbstractCegarLoop]: Abstraction has 4947 states and 22641 transitions. [2022-11-20 11:17:57,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:17:57,431 INFO L276 IsEmpty]: Start isEmpty. Operand 4947 states and 22641 transitions. [2022-11-20 11:17:57,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 11:17:57,432 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:17:57,432 INFO L195 NwaCegarLoop]: trace histogram [12, 6, 1, 1, 1] [2022-11-20 11:17:57,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Ended with exit code 0 [2022-11-20 11:17:57,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:17:57,633 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:17:57,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:17:57,633 INFO L85 PathProgramCache]: Analyzing trace with hash 380435790, now seen corresponding path program 5 times [2022-11-20 11:17:57,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:17:57,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1954216141] [2022-11-20 11:17:57,634 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:17:57,634 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:17:57,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:17:57,635 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:17:57,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:17:58,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-11-20 11:17:58,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:17:58,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-20 11:17:58,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:17:58,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 11:17:59,149 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 11:17:59,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:18:04,868 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 6 proven. 78 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 11:18:04,868 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:18:04,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1954216141] [2022-11-20 11:18:04,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1954216141] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:18:04,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:18:04,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2022-11-20 11:18:04,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400737191] [2022-11-20 11:18:04,869 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:18:04,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 11:18:04,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:18:04,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 11:18:04,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2022-11-20 11:18:04,870 INFO L87 Difference]: Start difference. First operand 4947 states and 22641 transitions. Second operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:18:10,597 WARN L233 SmtUtils]: Spent 5.14s on a formula simplification. DAG size of input: 152 DAG size of output: 140 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:18:18,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:18:46,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:18:48,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:18:50,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:18:52,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:18:54,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:18:56,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:18:58,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:19:00,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:19:02,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:19:04,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:19:06,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:19:08,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:19:22,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:22,397 INFO L93 Difference]: Finished difference Result 48657 states and 243125 transitions. [2022-11-20 11:19:22,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-20 11:19:22,399 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-20 11:19:22,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:22,811 INFO L225 Difference]: With dead ends: 48657 [2022-11-20 11:19:22,811 INFO L226 Difference]: Without dead ends: 48657 [2022-11-20 11:19:22,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 35.7s TimeCoverageRelationStatistics Valid=905, Invalid=2517, Unknown=0, NotChecked=0, Total=3422 [2022-11-20 11:19:22,812 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 3457 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 5103 mSolverCounterSat, 540 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3457 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 5656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 540 IncrementalHoareTripleChecker+Valid, 5103 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:22,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3457 Valid, 585 Invalid, 5656 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [540 Valid, 5103 Invalid, 13 Unknown, 0 Unchecked, 46.8s Time] [2022-11-20 11:19:22,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48657 states. [2022-11-20 11:19:23,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48657 to 4946. [2022-11-20 11:19:23,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4946 states, 4927 states have (on average 4.595494215546986) internal successors, (22642), 4945 states have internal predecessors, (22642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:23,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4946 states to 4946 states and 22642 transitions. [2022-11-20 11:19:23,487 INFO L78 Accepts]: Start accepts. Automaton has 4946 states and 22642 transitions. Word has length 21 [2022-11-20 11:19:23,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:23,487 INFO L495 AbstractCegarLoop]: Abstraction has 4946 states and 22642 transitions. [2022-11-20 11:19:23,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:23,487 INFO L276 IsEmpty]: Start isEmpty. Operand 4946 states and 22642 transitions. [2022-11-20 11:19:23,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 11:19:23,490 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:23,490 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:19:23,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:19:23,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:19:23,692 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:19:23,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:23,692 INFO L85 PathProgramCache]: Analyzing trace with hash 767014922, now seen corresponding path program 2 times [2022-11-20 11:19:23,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:19:23,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1588335650] [2022-11-20 11:19:23,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:19:23,693 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:19:23,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:19:23,694 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:19:23,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:19:24,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:19:24,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:19:24,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 11:19:24,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:19:24,191 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:19:24,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:19:24,335 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 11:19:24,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 11:19:24,466 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 11:19:24,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-20 11:19:24,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 11:19:24,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:19:24,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:19:24,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-11-20 11:19:24,657 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-20 11:19:24,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-20 11:19:25,288 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 11:19:25,289 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:19:25,289 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:19:25,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1588335650] [2022-11-20 11:19:25,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1588335650] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:19:25,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:19:25,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:19:25,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737030524] [2022-11-20 11:19:25,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:19:25,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:19:25,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:19:25,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:19:25,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:19:25,290 INFO L87 Difference]: Start difference. First operand 4946 states and 22642 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:25,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:25,551 INFO L93 Difference]: Finished difference Result 4942 states and 22603 transitions. [2022-11-20 11:19:25,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:19:25,552 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-20 11:19:25,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:25,567 INFO L225 Difference]: With dead ends: 4942 [2022-11-20 11:19:25,567 INFO L226 Difference]: Without dead ends: 4942 [2022-11-20 11:19:25,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:19:25,568 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:25,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 32 Unchecked, 0.2s Time] [2022-11-20 11:19:25,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4942 states. [2022-11-20 11:19:25,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4942 to 4936. [2022-11-20 11:19:25,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4936 states, 4917 states have (on average 4.59263778726866) internal successors, (22582), 4935 states have internal predecessors, (22582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:25,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4936 states to 4936 states and 22582 transitions. [2022-11-20 11:19:25,663 INFO L78 Accepts]: Start accepts. Automaton has 4936 states and 22582 transitions. Word has length 22 [2022-11-20 11:19:25,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:25,663 INFO L495 AbstractCegarLoop]: Abstraction has 4936 states and 22582 transitions. [2022-11-20 11:19:25,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:25,663 INFO L276 IsEmpty]: Start isEmpty. Operand 4936 states and 22582 transitions. [2022-11-20 11:19:25,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 11:19:25,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:25,664 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:19:25,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:19:25,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:19:25,865 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:19:25,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:25,865 INFO L85 PathProgramCache]: Analyzing trace with hash 26057680, now seen corresponding path program 5 times [2022-11-20 11:19:25,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:19:25,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [388699040] [2022-11-20 11:19:25,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:19:25,866 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:19:25,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:19:25,867 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:19:25,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:19:26,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-20 11:19:26,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:19:26,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 11:19:26,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:19:27,009 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 11:19:27,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:19:27,749 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 11:19:27,749 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:19:27,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [388699040] [2022-11-20 11:19:27,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [388699040] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:19:27,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:19:27,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2022-11-20 11:19:27,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707148846] [2022-11-20 11:19:27,750 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:19:27,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 11:19:27,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:19:27,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 11:19:27,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2022-11-20 11:19:27,752 INFO L87 Difference]: Start difference. First operand 4936 states and 22582 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:38,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:38,117 INFO L93 Difference]: Finished difference Result 10849 states and 47981 transitions. [2022-11-20 11:19:38,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-20 11:19:38,119 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-20 11:19:38,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:38,153 INFO L225 Difference]: With dead ends: 10849 [2022-11-20 11:19:38,153 INFO L226 Difference]: Without dead ends: 10849 [2022-11-20 11:19:38,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=537, Invalid=2219, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 11:19:38,153 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 1045 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 2510 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1045 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 2596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:38,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1045 Valid, 370 Invalid, 2596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2510 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2022-11-20 11:19:38,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10849 states. [2022-11-20 11:19:38,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10849 to 8214. [2022-11-20 11:19:38,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8214 states, 8195 states have (on average 4.674069554606468) internal successors, (38304), 8213 states have internal predecessors, (38304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:38,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8214 states to 8214 states and 38304 transitions. [2022-11-20 11:19:38,375 INFO L78 Accepts]: Start accepts. Automaton has 8214 states and 38304 transitions. Word has length 22 [2022-11-20 11:19:38,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:38,375 INFO L495 AbstractCegarLoop]: Abstraction has 8214 states and 38304 transitions. [2022-11-20 11:19:38,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:38,375 INFO L276 IsEmpty]: Start isEmpty. Operand 8214 states and 38304 transitions. [2022-11-20 11:19:38,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 11:19:38,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:38,377 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:19:38,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Ended with exit code 0 [2022-11-20 11:19:38,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:19:38,579 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:19:38,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:38,580 INFO L85 PathProgramCache]: Analyzing trace with hash 113853886, now seen corresponding path program 2 times [2022-11-20 11:19:38,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:19:38,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [817681779] [2022-11-20 11:19:38,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:19:38,580 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 11:19:38,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:19:38,581 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:19:38,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:19:38,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:19:38,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:19:39,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 11:19:39,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:19:39,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 11:19:39,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 11:19:39,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:19:39,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 11:19:39,126 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:19:39,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 11:19:39,474 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 11:19:39,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:19:40,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:19:41,059 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 11:19:41,060 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:19:41,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [817681779] [2022-11-20 11:19:41,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [817681779] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:19:41,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:19:41,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 11:19:41,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112507634] [2022-11-20 11:19:41,060 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:19:41,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:19:41,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:19:41,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:19:41,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:19:41,061 INFO L87 Difference]: Start difference. First operand 8214 states and 38304 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:48,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:48,425 INFO L93 Difference]: Finished difference Result 17116 states and 79272 transitions. [2022-11-20 11:19:48,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 11:19:48,427 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-20 11:19:48,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:48,496 INFO L225 Difference]: With dead ends: 17116 [2022-11-20 11:19:48,496 INFO L226 Difference]: Without dead ends: 17116 [2022-11-20 11:19:48,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2022-11-20 11:19:48,497 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 517 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:48,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 51 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-20 11:19:48,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17116 states. [2022-11-20 11:19:48,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17116 to 10206. [2022-11-20 11:19:48,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10206 states, 10187 states have (on average 4.853244331010111) internal successors, (49440), 10205 states have internal predecessors, (49440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:48,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10206 states to 10206 states and 49440 transitions. [2022-11-20 11:19:48,877 INFO L78 Accepts]: Start accepts. Automaton has 10206 states and 49440 transitions. Word has length 22 [2022-11-20 11:19:48,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:48,877 INFO L495 AbstractCegarLoop]: Abstraction has 10206 states and 49440 transitions. [2022-11-20 11:19:48,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:48,877 INFO L276 IsEmpty]: Start isEmpty. Operand 10206 states and 49440 transitions. [2022-11-20 11:19:48,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 11:19:48,879 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:48,879 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:19:48,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:19:49,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:19:49,079 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:19:49,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:49,080 INFO L85 PathProgramCache]: Analyzing trace with hash -879271624, now seen corresponding path program 1 times [2022-11-20 11:19:49,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:19:49,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [527963919] [2022-11-20 11:19:49,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:49,080 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 11:19:49,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:19:49,081 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:19:49,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:19:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:49,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 11:19:49,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:19:49,496 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 11:19:49,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:19:49,496 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:19:49,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [527963919] [2022-11-20 11:19:49,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [527963919] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:19:49,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:19:49,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:19:49,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906973024] [2022-11-20 11:19:49,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:19:49,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:19:49,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:19:49,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:19:49,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:19:49,497 INFO L87 Difference]: Start difference. First operand 10206 states and 49440 transitions. Second operand has 3 states, 2 states have (on average 11.0) internal successors, (22), 2 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 11:19:49,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:49,918 INFO L93 Difference]: Finished difference Result 10273 states and 49592 transitions. [2022-11-20 11:19:49,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:19:49,919 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 2 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 22 [2022-11-20 11:19:49,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:49,954 INFO L225 Difference]: With dead ends: 10273 [2022-11-20 11:19:49,954 INFO L226 Difference]: Without dead ends: 10167 [2022-11-20 11:19:49,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 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 11:19:49,954 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:49,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 6 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:19:49,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10167 states. [2022-11-20 11:19:50,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10167 to 10129. [2022-11-20 11:19:50,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10129 states, 10110 states have (on average 4.871513353115727) internal successors, (49251), 10128 states have internal predecessors, (49251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:50,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10129 states to 10129 states and 49251 transitions. [2022-11-20 11:19:50,408 INFO L78 Accepts]: Start accepts. Automaton has 10129 states and 49251 transitions. Word has length 22 [2022-11-20 11:19:50,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:50,408 INFO L495 AbstractCegarLoop]: Abstraction has 10129 states and 49251 transitions. [2022-11-20 11:19:50,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 2 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 11:19:50,408 INFO L276 IsEmpty]: Start isEmpty. Operand 10129 states and 49251 transitions. [2022-11-20 11:19:50,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 11:19:50,411 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:50,411 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:19:50,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2022-11-20 11:19:50,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:19:50,620 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:19:50,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:50,620 INFO L85 PathProgramCache]: Analyzing trace with hash -213185376, now seen corresponding path program 1 times [2022-11-20 11:19:50,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:19:50,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [450116274] [2022-11-20 11:19:50,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:50,620 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:19:50,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:19:50,621 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:19:50,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:19:51,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:51,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 11:19:51,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:19:51,236 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:19:51,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:19:51,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 11:19:51,637 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 11:19:51,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:19:52,443 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 11:19:52,443 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:19:52,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [450116274] [2022-11-20 11:19:52,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [450116274] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:19:52,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:19:52,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-11-20 11:19:52,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788645253] [2022-11-20 11:19:52,443 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:19:52,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 11:19:52,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:19:52,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 11:19:52,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:19:52,444 INFO L87 Difference]: Start difference. First operand 10129 states and 49251 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:57,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:19:59,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:20:00,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:20:02,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:20:04,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:20:06,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:20:08,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:20:09,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:20:11,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:20:13,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:20:15,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:20:19,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:20:19,111 INFO L93 Difference]: Finished difference Result 30890 states and 155866 transitions. [2022-11-20 11:20:19,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 11:20:19,113 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-20 11:20:19,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:20:19,265 INFO L225 Difference]: With dead ends: 30890 [2022-11-20 11:20:19,265 INFO L226 Difference]: Without dead ends: 30890 [2022-11-20 11:20:19,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 11:20:19,265 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 802 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 1477 mSolverCounterSat, 282 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 1762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 1477 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:20:19,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [802 Valid, 150 Invalid, 1762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 1477 Invalid, 3 Unknown, 0 Unchecked, 24.2s Time] [2022-11-20 11:20:19,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30890 states. [2022-11-20 11:20:19,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30890 to 9722. [2022-11-20 11:20:19,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9722 states, 9703 states have (on average 4.873132021024426) internal successors, (47284), 9721 states have internal predecessors, (47284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:20:19,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9722 states to 9722 states and 47284 transitions. [2022-11-20 11:20:19,981 INFO L78 Accepts]: Start accepts. Automaton has 9722 states and 47284 transitions. Word has length 23 [2022-11-20 11:20:19,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:20:19,981 INFO L495 AbstractCegarLoop]: Abstraction has 9722 states and 47284 transitions. [2022-11-20 11:20:19,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:20:19,981 INFO L276 IsEmpty]: Start isEmpty. Operand 9722 states and 47284 transitions. [2022-11-20 11:20:19,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 11:20:19,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:20:19,983 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1] [2022-11-20 11:20:19,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 11:20:20,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:20:20,183 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:20:20,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:20:20,184 INFO L85 PathProgramCache]: Analyzing trace with hash 2122533417, now seen corresponding path program 4 times [2022-11-20 11:20:20,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:20:20,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [544770892] [2022-11-20 11:20:20,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:20:20,184 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 11:20:20,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:20:20,185 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:20:20,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:20:20,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:20:20,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:20:20,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 11:20:20,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:20:20,673 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:20:20,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:20:22,314 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:20:22,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:20:35,092 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:20:35,092 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:20:35,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [544770892] [2022-11-20 11:20:35,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [544770892] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:20:35,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:20:35,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2022-11-20 11:20:35,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439021147] [2022-11-20 11:20:35,093 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:20:35,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-20 11:20:35,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:20:35,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-20 11:20:35,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1634, Unknown=0, NotChecked=0, Total=2256 [2022-11-20 11:20:35,094 INFO L87 Difference]: Start difference. First operand 9722 states and 47284 transitions. Second operand has 48 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:21:01,812 WARN L233 SmtUtils]: Spent 14.56s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:21:20,143 WARN L233 SmtUtils]: Spent 15.89s on a formula simplification that was a NOOP. DAG size: 243 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:21:37,893 WARN L233 SmtUtils]: Spent 15.68s on a formula simplification that was a NOOP. DAG size: 232 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:21:50,291 WARN L233 SmtUtils]: Spent 9.88s on a formula simplification that was a NOOP. DAG size: 222 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:22:03,207 WARN L233 SmtUtils]: Spent 10.05s on a formula simplification that was a NOOP. DAG size: 211 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:22:19,100 WARN L233 SmtUtils]: Spent 11.71s on a formula simplification that was a NOOP. DAG size: 200 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:22:29,750 WARN L233 SmtUtils]: Spent 8.24s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:22:41,124 WARN L233 SmtUtils]: Spent 8.35s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:22:43,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:22:45,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:22:47,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:22:49,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:22:51,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:22:53,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:22:55,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:22:57,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:22:59,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:23:01,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:23:03,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:23:05,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:23:07,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:23:09,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:23:11,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:23:13,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:23:15,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:23:17,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:23:19,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:23:21,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:23:23,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:23:25,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:23:46,253 WARN L233 SmtUtils]: Spent 5.20s on a formula simplification that was a NOOP. DAG size: 146 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:23:55,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:23:57,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:23:59,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:24:01,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:24:03,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:24:05,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:24:07,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:24:09,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:24:11,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:24:13,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:24:15,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:24:17,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:24:19,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:24:21,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:24:23,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:24:25,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:24:27,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:24:29,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:24:31,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:24:33,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:24:35,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:24:37,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:25:14,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:25:14,915 INFO L93 Difference]: Finished difference Result 111510 states and 574306 transitions. [2022-11-20 11:25:14,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-20 11:25:14,918 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-20 11:25:14,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:25:16,082 INFO L225 Difference]: With dead ends: 111510 [2022-11-20 11:25:16,082 INFO L226 Difference]: Without dead ends: 111510 [2022-11-20 11:25:16,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 160.4s TimeCoverageRelationStatistics Valid=1678, Invalid=3152, Unknown=0, NotChecked=0, Total=4830 [2022-11-20 11:25:16,083 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 7261 mSDsluCounter, 1518 mSDsCounter, 0 mSdLazyCounter, 15211 mSolverCounterSat, 1164 mSolverCounterUnsat, 44 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 126.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7261 SdHoareTripleChecker+Valid, 1584 SdHoareTripleChecker+Invalid, 16419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1164 IncrementalHoareTripleChecker+Valid, 15211 IncrementalHoareTripleChecker+Invalid, 44 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 130.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:25:16,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7261 Valid, 1584 Invalid, 16419 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1164 Valid, 15211 Invalid, 44 Unknown, 0 Unchecked, 130.2s Time] [2022-11-20 11:25:16,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111510 states. [2022-11-20 11:25:17,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111510 to 9766. [2022-11-20 11:25:17,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9766 states, 9747 states have (on average 4.8601621011593314) internal successors, (47372), 9765 states have internal predecessors, (47372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:25:17,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9766 states to 9766 states and 47372 transitions. [2022-11-20 11:25:17,708 INFO L78 Accepts]: Start accepts. Automaton has 9766 states and 47372 transitions. Word has length 24 [2022-11-20 11:25:17,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:25:17,708 INFO L495 AbstractCegarLoop]: Abstraction has 9766 states and 47372 transitions. [2022-11-20 11:25:17,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:25:17,709 INFO L276 IsEmpty]: Start isEmpty. Operand 9766 states and 47372 transitions. [2022-11-20 11:25:17,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 11:25:17,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:25:17,712 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:25:17,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:25:17,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:25:17,912 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:25:17,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:25:17,913 INFO L85 PathProgramCache]: Analyzing trace with hash -621195331, now seen corresponding path program 2 times [2022-11-20 11:25:17,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:25:17,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1251142922] [2022-11-20 11:25:17,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:25:17,913 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:25:17,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:25:17,914 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:25:17,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:25:18,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:25:18,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:25:18,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 11:25:18,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:25:18,432 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:25:18,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 11:25:18,642 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-20 11:25:18,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 11:25:18,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 11:25:18,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:25:18,795 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-20 11:25:18,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2022-11-20 11:25:18,820 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:25:18,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 11:25:19,385 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 11:25:19,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:25:19,386 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:25:19,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1251142922] [2022-11-20 11:25:19,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1251142922] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:25:19,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:25:19,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:25:19,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940741993] [2022-11-20 11:25:19,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:25:19,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:25:19,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:25:19,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:25:19,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:25:19,387 INFO L87 Difference]: Start difference. First operand 9766 states and 47372 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 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 11:25:19,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:25:19,719 INFO L93 Difference]: Finished difference Result 9733 states and 47054 transitions. [2022-11-20 11:25:19,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:25:19,720 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 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 24 [2022-11-20 11:25:19,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:25:19,758 INFO L225 Difference]: With dead ends: 9733 [2022-11-20 11:25:19,758 INFO L226 Difference]: Without dead ends: 9733 [2022-11-20 11:25:19,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:25:19,759 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:25:19,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 12 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 33 Unchecked, 0.2s Time] [2022-11-20 11:25:19,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9733 states. [2022-11-20 11:25:20,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9733 to 9729. [2022-11-20 11:25:20,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9729 states, 9710 states have (on average 4.844284243048404) internal successors, (47038), 9728 states have internal predecessors, (47038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:25:20,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9729 states to 9729 states and 47038 transitions. [2022-11-20 11:25:20,085 INFO L78 Accepts]: Start accepts. Automaton has 9729 states and 47038 transitions. Word has length 24 [2022-11-20 11:25:20,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:25:20,085 INFO L495 AbstractCegarLoop]: Abstraction has 9729 states and 47038 transitions. [2022-11-20 11:25:20,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 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 11:25:20,085 INFO L276 IsEmpty]: Start isEmpty. Operand 9729 states and 47038 transitions. [2022-11-20 11:25:20,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 11:25:20,088 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:25:20,089 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:25:20,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:25:20,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:25:20,289 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-20 11:25:20,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:25:20,290 INFO L85 PathProgramCache]: Analyzing trace with hash 285108753, now seen corresponding path program 3 times [2022-11-20 11:25:20,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:25:20,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1876409128] [2022-11-20 11:25:20,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:25:20,290 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 11:25:20,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:25:20,291 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:25:20,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4edff9d-17c4-4a6b-902b-a26a8216c974/bin/uautomizer-ug76WZFUDN/mathsat -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 11:25:21,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 11:25:21,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:25:21,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 11:25:21,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:25:21,238 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 11:25:21,238 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 11:25:21,422 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 11:25:21,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 11:25:21,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:25:21,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 11:25:21,706 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-20 11:25:21,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-20 11:25:21,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:25:21,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 11:25:21,941 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 11:25:21,941 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 13 treesize of output 13 [2022-11-20 11:25:22,370 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 11:25:22,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:25:32,937 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 11:25:32,937 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:25:32,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1876409128] [2022-11-20 11:25:32,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1876409128] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:25:32,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:25:32,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-20 11:25:32,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252336638] [2022-11-20 11:25:32,938 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:25:32,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 11:25:32,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:25:32,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 11:25:32,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2022-11-20 11:25:32,939 INFO L87 Difference]: Start difference. First operand 9729 states and 47038 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)