./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 b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/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_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a --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-b5237d8 [2022-11-21 17:21:29,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 17:21:29,861 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 17:21:29,904 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 17:21:29,904 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 17:21:29,908 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 17:21:29,912 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 17:21:29,916 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 17:21:29,918 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 17:21:29,924 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 17:21:29,925 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 17:21:29,927 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 17:21:29,928 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 17:21:29,930 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 17:21:29,932 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 17:21:29,934 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 17:21:29,937 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 17:21:29,939 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 17:21:29,940 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 17:21:29,945 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 17:21:29,947 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 17:21:29,949 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 17:21:29,951 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 17:21:29,952 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 17:21:29,960 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 17:21:29,967 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 17:21:29,967 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 17:21:29,968 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 17:21:29,970 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 17:21:29,971 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 17:21:29,972 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 17:21:29,973 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 17:21:29,975 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 17:21:29,976 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 17:21:29,978 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 17:21:29,978 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 17:21:29,979 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 17:21:29,979 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 17:21:29,979 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 17:21:29,980 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 17:21:29,981 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 17:21:29,982 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-21 17:21:30,022 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 17:21:30,023 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 17:21:30,024 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 17:21:30,024 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 17:21:30,025 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 17:21:30,025 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 17:21:30,026 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 17:21:30,026 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 17:21:30,027 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 17:21:30,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 17:21:30,028 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 17:21:30,028 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-21 17:21:30,028 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 17:21:30,029 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 17:21:30,029 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 17:21:30,029 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-21 17:21:30,029 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-21 17:21:30,029 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-21 17:21:30,030 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 17:21:30,030 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-21 17:21:30,030 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 17:21:30,030 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 17:21:30,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 17:21:30,031 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 17:21:30,031 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 17:21:30,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 17:21:30,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 17:21:30,032 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 17:21:30,032 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 17:21:30,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 17:21:30,033 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_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f [2022-11-21 17:21:30,381 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 17:21:30,417 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 17:21:30,420 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 17:21:30,422 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 17:21:30,422 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 17:21:30,423 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2022-11-21 17:21:33,561 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 17:21:33,897 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 17:21:33,898 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2022-11-21 17:21:33,907 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/data/2d2e312a3/66a1622bf7164342aa95a44d42b9ada7/FLAG2bb3c2d85 [2022-11-21 17:21:33,932 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/data/2d2e312a3/66a1622bf7164342aa95a44d42b9ada7 [2022-11-21 17:21:33,936 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 17:21:33,938 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 17:21:33,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 17:21:33,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 17:21:33,946 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 17:21:33,947 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 05:21:33" (1/1) ... [2022-11-21 17:21:33,948 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38a39547 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:33, skipping insertion in model container [2022-11-21 17:21:33,948 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 05:21:33" (1/1) ... [2022-11-21 17:21:33,956 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 17:21:33,980 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 17:21:34,207 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_c2b0d173-597c-4d02-b917-979008e9cbcc/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2022-11-21 17:21:34,227 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 17:21:34,251 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) [2022-11-21 17:21:34,252 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@458f451f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:34, skipping insertion in model container [2022-11-21 17:21:34,252 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 17:21:34,253 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-21 17:21:34,255 INFO L158 Benchmark]: Toolchain (without parser) took 315.98ms. Allocated memory is still 167.8MB. Free memory was 135.6MB in the beginning and 125.5MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-21 17:21:34,256 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 111.1MB. Free memory was 65.6MB in the beginning and 65.4MB in the end (delta: 241.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-21 17:21:34,257 INFO L158 Benchmark]: CACSL2BoogieTranslator took 311.68ms. Allocated memory is still 167.8MB. Free memory was 135.2MB in the beginning and 125.5MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-21 17:21:34,260 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 111.1MB. Free memory was 65.6MB in the beginning and 65.4MB in the end (delta: 241.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 311.68ms. Allocated memory is still 167.8MB. Free memory was 135.2MB in the beginning and 125.5MB in the end (delta: 9.6MB). 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-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/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_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a --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-b5237d8 [2022-11-21 17:21:36,697 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 17:21:36,700 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 17:21:36,746 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 17:21:36,746 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 17:21:36,748 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 17:21:36,749 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 17:21:36,751 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 17:21:36,753 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 17:21:36,754 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 17:21:36,756 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 17:21:36,757 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 17:21:36,758 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 17:21:36,759 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 17:21:36,760 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 17:21:36,762 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 17:21:36,763 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 17:21:36,764 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 17:21:36,766 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 17:21:36,768 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 17:21:36,770 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 17:21:36,771 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 17:21:36,772 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 17:21:36,773 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 17:21:36,777 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 17:21:36,777 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 17:21:36,778 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 17:21:36,779 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 17:21:36,780 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 17:21:36,781 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 17:21:36,781 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 17:21:36,782 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 17:21:36,783 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 17:21:36,784 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 17:21:36,785 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 17:21:36,786 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 17:21:36,787 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 17:21:36,787 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 17:21:36,787 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 17:21:36,788 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 17:21:36,789 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 17:21:36,790 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-21 17:21:36,814 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 17:21:36,814 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 17:21:36,815 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 17:21:36,815 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 17:21:36,816 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 17:21:36,816 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 17:21:36,817 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 17:21:36,818 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 17:21:36,818 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 17:21:36,818 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 17:21:36,819 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 17:21:36,819 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-21 17:21:36,819 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 17:21:36,820 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 17:21:36,820 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 17:21:36,820 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-21 17:21:36,821 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-21 17:21:36,821 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-21 17:21:36,821 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 17:21:36,821 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-21 17:21:36,822 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-21 17:21:36,822 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-21 17:21:36,822 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 17:21:36,823 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 17:21:36,823 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 17:21:36,823 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 17:21:36,823 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 17:21:36,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 17:21:36,824 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 17:21:36,824 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 17:21:36,825 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-21 17:21:36,825 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-21 17:21:36,825 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-21 17:21:36,825 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_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f [2022-11-21 17:21:37,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 17:21:37,200 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 17:21:37,202 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 17:21:37,204 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 17:21:37,204 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 17:21:37,206 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2022-11-21 17:21:40,303 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 17:21:40,571 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 17:21:40,572 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2022-11-21 17:21:40,579 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/data/c3191cf0e/f3e8a0c5b01545a09f4c0b0b6694f256/FLAG39731c6da [2022-11-21 17:21:40,606 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/data/c3191cf0e/f3e8a0c5b01545a09f4c0b0b6694f256 [2022-11-21 17:21:40,611 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 17:21:40,613 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 17:21:40,618 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 17:21:40,618 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 17:21:40,625 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 17:21:40,626 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 05:21:40" (1/1) ... [2022-11-21 17:21:40,628 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a8a39d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:40, skipping insertion in model container [2022-11-21 17:21:40,628 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 05:21:40" (1/1) ... [2022-11-21 17:21:40,635 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 17:21:40,664 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 17:21:40,919 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_c2b0d173-597c-4d02-b917-979008e9cbcc/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2022-11-21 17:21:40,938 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 17:21:40,958 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-21 17:21:40,961 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 17:21:40,985 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_c2b0d173-597c-4d02-b917-979008e9cbcc/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2022-11-21 17:21:40,990 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 17:21:40,996 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 17:21:41,019 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_c2b0d173-597c-4d02-b917-979008e9cbcc/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2022-11-21 17:21:41,024 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 17:21:41,050 INFO L208 MainTranslator]: Completed translation [2022-11-21 17:21:41,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:41 WrapperNode [2022-11-21 17:21:41,050 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 17:21:41,052 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 17:21:41,052 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 17:21:41,052 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 17:21:41,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:41" (1/1) ... [2022-11-21 17:21:41,073 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:41" (1/1) ... [2022-11-21 17:21:41,144 INFO L138 Inliner]: procedures = 28, calls = 45, calls flagged for inlining = 15, calls inlined = 27, statements flattened = 262 [2022-11-21 17:21:41,152 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 17:21:41,153 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 17:21:41,153 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 17:21:41,154 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 17:21:41,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:41" (1/1) ... [2022-11-21 17:21:41,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:41" (1/1) ... [2022-11-21 17:21:41,170 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:41" (1/1) ... [2022-11-21 17:21:41,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:41" (1/1) ... [2022-11-21 17:21:41,182 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:41" (1/1) ... [2022-11-21 17:21:41,187 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:41" (1/1) ... [2022-11-21 17:21:41,190 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:41" (1/1) ... [2022-11-21 17:21:41,192 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:41" (1/1) ... [2022-11-21 17:21:41,196 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 17:21:41,197 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 17:21:41,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 17:21:41,197 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 17:21:41,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:41" (1/1) ... [2022-11-21 17:21:41,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 17:21:41,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:21:41,236 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 17:21:41,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 17:21:41,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 17:21:41,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-21 17:21:41,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 17:21:41,280 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-21 17:21:41,281 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-21 17:21:41,281 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-21 17:21:41,281 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-21 17:21:41,281 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-21 17:21:41,281 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-21 17:21:41,282 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-21 17:21:41,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-21 17:21:41,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 17:21:41,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 17:21:41,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 17:21:41,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-21 17:21:41,284 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-21 17:21:41,410 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 17:21:41,412 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 17:21:42,293 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 17:21:42,306 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 17:21:42,306 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-21 17:21:42,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 05:21:42 BoogieIcfgContainer [2022-11-21 17:21:42,309 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 17:21:42,311 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 17:21:42,312 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 17:21:42,315 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 17:21:42,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 05:21:40" (1/3) ... [2022-11-21 17:21:42,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2de6db2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 05:21:42, skipping insertion in model container [2022-11-21 17:21:42,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:21:41" (2/3) ... [2022-11-21 17:21:42,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2de6db2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 05:21:42, skipping insertion in model container [2022-11-21 17:21:42,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 05:21:42" (3/3) ... [2022-11-21 17:21:42,319 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-three-array-sum-alt.wvr.c [2022-11-21 17:21:42,340 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 17:21:42,340 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2022-11-21 17:21:42,340 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 17:21:42,513 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-21 17:21:42,583 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-21 17:21:42,604 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 374 places, 393 transitions, 810 flow [2022-11-21 17:21:42,609 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 374 places, 393 transitions, 810 flow [2022-11-21 17:21:42,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 374 places, 393 transitions, 810 flow [2022-11-21 17:21:42,865 INFO L130 PetriNetUnfolder]: 29/390 cut-off events. [2022-11-21 17:21:42,865 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-21 17:21:42,877 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. [2022-11-21 17:21:42,889 INFO L119 LiptonReduction]: Number of co-enabled transitions 20950 [2022-11-21 17:22:49,917 INFO L134 LiptonReduction]: Checked pairs total: 21781 [2022-11-21 17:22:49,917 INFO L136 LiptonReduction]: Total number of compositions: 466 [2022-11-21 17:22:49,924 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 67 places, 63 transitions, 150 flow [2022-11-21 17:22:50,035 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) [2022-11-21 17:22:50,054 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 17:22:50,061 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;@5fddf9cd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 17:22:50,062 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2022-11-21 17:22:50,068 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) [2022-11-21 17:22:50,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-21 17:22:50,073 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:22:50,074 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-21 17:22:50,074 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-21 17:22:50,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:22:50,080 INFO L85 PathProgramCache]: Analyzing trace with hash 49928, now seen corresponding path program 1 times [2022-11-21 17:22:50,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:22:50,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [208462105] [2022-11-21 17:22:50,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:22:50,094 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:22:50,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:22:50,095 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:22:50,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:22:50,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:22:50,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-21 17:22:50,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:22:50,555 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-21 17:22:50,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2022-11-21 17:22:50,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:22:50,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 17:22:50,605 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:22:50,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [208462105] [2022-11-21 17:22:50,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [208462105] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:22:50,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:22:50,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-21 17:22:50,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823785821] [2022-11-21 17:22:50,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:22:50,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:22:50,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:22:50,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:22:50,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:22:50,639 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) [2022-11-21 17:22:50,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:22:50,999 INFO L93 Difference]: Finished difference Result 1248 states and 4342 transitions. [2022-11-21 17:22:51,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:22:51,002 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 [2022-11-21 17:22:51,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:22:51,026 INFO L225 Difference]: With dead ends: 1248 [2022-11-21 17:22:51,026 INFO L226 Difference]: Without dead ends: 1248 [2022-11-21 17:22:51,027 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 [2022-11-21 17:22:51,030 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 [2022-11-21 17:22:51,031 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] [2022-11-21 17:22:51,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2022-11-21 17:22:51,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1248. [2022-11-21 17:22:51,147 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) [2022-11-21 17:22:51,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 4342 transitions. [2022-11-21 17:22:51,156 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 4342 transitions. Word has length 2 [2022-11-21 17:22:51,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:22:51,157 INFO L495 AbstractCegarLoop]: Abstraction has 1248 states and 4342 transitions. [2022-11-21 17:22:51,157 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) [2022-11-21 17:22:51,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 4342 transitions. [2022-11-21 17:22:51,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-21 17:22:51,158 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:22:51,158 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-21 17:22:51,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:22:51,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:22:51,370 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-21 17:22:51,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:22:51,371 INFO L85 PathProgramCache]: Analyzing trace with hash 49929, now seen corresponding path program 1 times [2022-11-21 17:22:51,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:22:51,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1767309514] [2022-11-21 17:22:51,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:22:51,372 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:22:51,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:22:51,373 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:22:51,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:22:51,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:22:51,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 17:22:51,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:22:51,603 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 17:22:51,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-21 17:22:51,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:22:51,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 17:22:51,635 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:22:51,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1767309514] [2022-11-21 17:22:51,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1767309514] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:22:51,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:22:51,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-21 17:22:51,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819505095] [2022-11-21 17:22:51,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:22:51,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:22:51,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:22:51,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:22:51,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:22:51,638 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) [2022-11-21 17:22:52,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:22:52,310 INFO L93 Difference]: Finished difference Result 2492 states and 8680 transitions. [2022-11-21 17:22:52,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:22:52,312 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 [2022-11-21 17:22:52,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:22:52,372 INFO L225 Difference]: With dead ends: 2492 [2022-11-21 17:22:52,373 INFO L226 Difference]: Without dead ends: 2492 [2022-11-21 17:22:52,373 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 [2022-11-21 17:22:52,375 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 44 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-11-21 17:22:52,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 6 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-21 17:22:52,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2492 states. [2022-11-21 17:22:52,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2492 to 1251. [2022-11-21 17:22:52,431 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) [2022-11-21 17:22:52,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 4350 transitions. [2022-11-21 17:22:52,439 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 4350 transitions. Word has length 2 [2022-11-21 17:22:52,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:22:52,439 INFO L495 AbstractCegarLoop]: Abstraction has 1251 states and 4350 transitions. [2022-11-21 17:22:52,439 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) [2022-11-21 17:22:52,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 4350 transitions. [2022-11-21 17:22:52,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-21 17:22:52,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:22:52,440 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-21 17:22:52,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:22:52,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:22:52,652 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-21 17:22:52,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:22:52,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1554452, now seen corresponding path program 1 times [2022-11-21 17:22:52,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:22:52,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1033128247] [2022-11-21 17:22:52,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:22:52,654 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:22:52,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:22:52,655 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:22:52,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:22:52,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:22:52,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-21 17:22:52,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:22:52,903 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 17:22:52,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-21 17:22:53,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:22:53,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:22:53,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:22:53,318 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:22:53,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1033128247] [2022-11-21 17:22:53,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1033128247] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:22:53,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:22:53,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-21 17:22:53,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532902692] [2022-11-21 17:22:53,319 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:22:53,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 17:22:53,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:22:53,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 17:22:53,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-21 17:22:53,320 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) [2022-11-21 17:22:55,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:22:57,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:22:58,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:22:58,250 INFO L93 Difference]: Finished difference Result 3742 states and 13034 transitions. [2022-11-21 17:22:58,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 17:22:58,252 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 [2022-11-21 17:22:58,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:22:58,281 INFO L225 Difference]: With dead ends: 3742 [2022-11-21 17:22:58,281 INFO L226 Difference]: Without dead ends: 3742 [2022-11-21 17:22:58,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-21 17:22:58,293 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 179 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s 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 [2022-11-21 17:22:58,295 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] [2022-11-21 17:22:58,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3742 states. [2022-11-21 17:22:58,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3742 to 1260. [2022-11-21 17:22:58,397 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) [2022-11-21 17:22:58,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 4374 transitions. [2022-11-21 17:22:58,404 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 4374 transitions. Word has length 3 [2022-11-21 17:22:58,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:22:58,405 INFO L495 AbstractCegarLoop]: Abstraction has 1260 states and 4374 transitions. [2022-11-21 17:22:58,406 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) [2022-11-21 17:22:58,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 4374 transitions. [2022-11-21 17:22:58,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-21 17:22:58,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:22:58,406 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-21 17:22:58,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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)] Ended with exit code 0 [2022-11-21 17:22:58,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:22:58,618 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-21 17:22:58,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:22:58,619 INFO L85 PathProgramCache]: Analyzing trace with hash 48295142, now seen corresponding path program 1 times [2022-11-21 17:22:58,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:22:58,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1013071473] [2022-11-21 17:22:58,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:22:58,619 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:22:58,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:22:58,620 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:22:58,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:22:58,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:22:58,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-21 17:22:58,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:22:58,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:22:58,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:22:58,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:22:58,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:22:58,866 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-21 17:22:58,866 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 [2022-11-21 17:22:58,933 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-21 17:22:58,933 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 [2022-11-21 17:22:59,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:22:59,020 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 [2022-11-21 17:22:59,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:22:59,058 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 [2022-11-21 17:22:59,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:22:59,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 17:22:59,095 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:22:59,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1013071473] [2022-11-21 17:22:59,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1013071473] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:22:59,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:22:59,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 17:22:59,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894766463] [2022-11-21 17:22:59,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:22:59,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 17:22:59,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:22:59,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 17:22:59,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 17:22:59,097 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) [2022-11-21 17:22:59,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:22:59,545 INFO L93 Difference]: Finished difference Result 1034 states and 3469 transitions. [2022-11-21 17:22:59,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:22:59,547 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 [2022-11-21 17:22:59,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:22:59,553 INFO L225 Difference]: With dead ends: 1034 [2022-11-21 17:22:59,553 INFO L226 Difference]: Without dead ends: 1034 [2022-11-21 17:22:59,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 17:22:59,554 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 96 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 17:22:59,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 3 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 17:22:59,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2022-11-21 17:22:59,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 1034. [2022-11-21 17:22:59,611 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) [2022-11-21 17:22:59,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 3469 transitions. [2022-11-21 17:22:59,641 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 3469 transitions. Word has length 4 [2022-11-21 17:22:59,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:22:59,652 INFO L495 AbstractCegarLoop]: Abstraction has 1034 states and 3469 transitions. [2022-11-21 17:22:59,653 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) [2022-11-21 17:22:59,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 3469 transitions. [2022-11-21 17:22:59,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-21 17:22:59,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:22:59,653 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-21 17:22:59,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:22:59,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:22:59,865 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-21 17:22:59,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:22:59,866 INFO L85 PathProgramCache]: Analyzing trace with hash 48295143, now seen corresponding path program 1 times [2022-11-21 17:22:59,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:22:59,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1204560166] [2022-11-21 17:22:59,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:22:59,867 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:22:59,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:22:59,868 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:22:59,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:22:59,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:22:59,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-21 17:22:59,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:23:00,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:23:00,101 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-21 17:23:00,101 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 [2022-11-21 17:23:00,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:23:00,483 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-21 17:23:00,484 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 [2022-11-21 17:23:00,865 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-11-21 17:23:00,866 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 [2022-11-21 17:23:03,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:23:03,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 17:23:03,349 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:23:03,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1204560166] [2022-11-21 17:23:03,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1204560166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:23:03,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:23:03,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:23:03,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797537915] [2022-11-21 17:23:03,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:23:03,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 17:23:03,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:23:03,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 17:23:03,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2022-11-21 17:23:03,351 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) [2022-11-21 17:23:04,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:23:04,006 INFO L93 Difference]: Finished difference Result 808 states and 2564 transitions. [2022-11-21 17:23:04,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:23:04,008 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 [2022-11-21 17:23:04,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:23:04,013 INFO L225 Difference]: With dead ends: 808 [2022-11-21 17:23:04,014 INFO L226 Difference]: Without dead ends: 808 [2022-11-21 17:23:04,014 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 [2022-11-21 17:23:04,015 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 92 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-21 17:23:04,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 3 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-21 17:23:04,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-11-21 17:23:04,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 808. [2022-11-21 17:23:04,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 662 states have (on average 3.8731117824773413) internal successors, (2564), 807 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:23:04,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2564 transitions. [2022-11-21 17:23:04,041 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2564 transitions. Word has length 4 [2022-11-21 17:23:04,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:23:04,042 INFO L495 AbstractCegarLoop]: Abstraction has 808 states and 2564 transitions. [2022-11-21 17:23:04,042 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) [2022-11-21 17:23:04,042 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2564 transitions. [2022-11-21 17:23:04,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-21 17:23:04,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:23:04,043 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-21 17:23:04,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:23:04,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:23:04,263 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-21 17:23:04,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:23:04,264 INFO L85 PathProgramCache]: Analyzing trace with hash -929354295, now seen corresponding path program 2 times [2022-11-21 17:23:04,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:23:04,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1475874176] [2022-11-21 17:23:04,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:23:04,265 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:23:04,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:23:04,266 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:23:04,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:23:04,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 17:23:04,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:23:04,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-21 17:23:04,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:23:04,547 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 17:23:04,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-21 17:23:04,735 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:23:04,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:23:05,526 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:23:05,527 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:23:05,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1475874176] [2022-11-21 17:23:05,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1475874176] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:23:05,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:23:05,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-21 17:23:05,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104142196] [2022-11-21 17:23:05,527 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:23:05,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 17:23:05,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:23:05,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 17:23:05,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-21 17:23:05,529 INFO L87 Difference]: Start difference. First operand 808 states and 2564 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) [2022-11-21 17:23:09,632 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 [] [2022-11-21 17:23:11,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:23:13,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:23:15,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:23:18,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:23:20,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:23:22,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:23:23,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:23:26,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:23:29,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:23:34,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:23:34,447 INFO L93 Difference]: Finished difference Result 7135 states and 22832 transitions. [2022-11-21 17:23:34,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-21 17:23:34,450 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 [2022-11-21 17:23:34,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:23:34,524 INFO L225 Difference]: With dead ends: 7135 [2022-11-21 17:23:34,525 INFO L226 Difference]: Without dead ends: 7135 [2022-11-21 17:23:34,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2022-11-21 17:23:34,526 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1360 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1331 mSolverCounterSat, 158 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1360 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 1496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1331 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.4s IncrementalHoareTripleChecker+Time [2022-11-21 17:23:34,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1360 Valid, 93 Invalid, 1496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1331 Invalid, 7 Unknown, 0 Unchecked, 27.4s Time] [2022-11-21 17:23:34,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7135 states. [2022-11-21 17:23:34,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7135 to 821. [2022-11-21 17:23:34,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 675 states have (on average 3.84) internal successors, (2592), 820 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:23:34,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2592 transitions. [2022-11-21 17:23:34,646 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2592 transitions. Word has length 6 [2022-11-21 17:23:34,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:23:34,646 INFO L495 AbstractCegarLoop]: Abstraction has 821 states and 2592 transitions. [2022-11-21 17:23:34,646 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) [2022-11-21 17:23:34,647 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2592 transitions. [2022-11-21 17:23:34,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-21 17:23:34,647 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:23:34,647 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-21 17:23:34,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:23:34,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:23:34,859 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-21 17:23:34,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:23:34,860 INFO L85 PathProgramCache]: Analyzing trace with hash -832972211, now seen corresponding path program 1 times [2022-11-21 17:23:34,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:23:34,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [983141890] [2022-11-21 17:23:34,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:23:34,861 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:23:34,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:23:34,862 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:23:34,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:23:34,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:23:34,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-21 17:23:34,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:23:35,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:23:35,106 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-21 17:23:35,107 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 [2022-11-21 17:23:35,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:23:35,424 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-21 17:23:35,424 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 [2022-11-21 17:23:35,661 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-21 17:23:35,662 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 [2022-11-21 17:23:35,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:23:35,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 17:23:35,844 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:23:35,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [983141890] [2022-11-21 17:23:35,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [983141890] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:23:35,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:23:35,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 17:23:35,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184243173] [2022-11-21 17:23:35,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:23:35,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 17:23:35,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:23:35,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 17:23:35,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 17:23:35,845 INFO L87 Difference]: Start difference. First operand 821 states and 2592 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) [2022-11-21 17:23:36,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:23:36,223 INFO L93 Difference]: Finished difference Result 771 states and 2447 transitions. [2022-11-21 17:23:36,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:23:36,225 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 [2022-11-21 17:23:36,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:23:36,235 INFO L225 Difference]: With dead ends: 771 [2022-11-21 17:23:36,235 INFO L226 Difference]: Without dead ends: 771 [2022-11-21 17:23:36,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 17:23:36,236 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 44 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 17:23:36,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 3 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 17:23:36,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-11-21 17:23:36,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 771. [2022-11-21 17:23:36,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 649 states have (on average 3.7704160246533127) internal successors, (2447), 770 states have internal predecessors, (2447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:23:36,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 2447 transitions. [2022-11-21 17:23:36,263 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 2447 transitions. Word has length 6 [2022-11-21 17:23:36,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:23:36,263 INFO L495 AbstractCegarLoop]: Abstraction has 771 states and 2447 transitions. [2022-11-21 17:23:36,263 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) [2022-11-21 17:23:36,264 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 2447 transitions. [2022-11-21 17:23:36,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-21 17:23:36,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:23:36,265 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-21 17:23:36,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:23:36,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:23:36,477 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-21 17:23:36,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:23:36,477 INFO L85 PathProgramCache]: Analyzing trace with hash -832972210, now seen corresponding path program 1 times [2022-11-21 17:23:36,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:23:36,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [59799408] [2022-11-21 17:23:36,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:23:36,478 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 [2022-11-21 17:23:36,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:23:36,478 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:23:36,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:23:36,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:23:36,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-21 17:23:36,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:23:36,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:23:36,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:23:36,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:23:36,726 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-21 17:23:36,727 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 [2022-11-21 17:23:36,747 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 [2022-11-21 17:23:36,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:23:36,802 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 [2022-11-21 17:23:36,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:23:36,834 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 [2022-11-21 17:23:36,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:23:36,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 17:23:36,898 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:23:36,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [59799408] [2022-11-21 17:23:36,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [59799408] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:23:36,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:23:36,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 17:23:36,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641472853] [2022-11-21 17:23:36,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:23:36,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 17:23:36,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:23:36,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 17:23:36,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 17:23:36,900 INFO L87 Difference]: Start difference. First operand 771 states and 2447 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) [2022-11-21 17:23:37,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:23:37,271 INFO L93 Difference]: Finished difference Result 721 states and 2302 transitions. [2022-11-21 17:23:37,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:23:37,272 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 [2022-11-21 17:23:37,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:23:37,278 INFO L225 Difference]: With dead ends: 721 [2022-11-21 17:23:37,278 INFO L226 Difference]: Without dead ends: 721 [2022-11-21 17:23:37,278 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 [2022-11-21 17:23:37,280 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 82 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 17:23:37,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 3 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 17:23:37,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2022-11-21 17:23:37,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 721. [2022-11-21 17:23:37,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 623 states have (on average 3.695024077046549) internal successors, (2302), 720 states have internal predecessors, (2302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:23:37,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 2302 transitions. [2022-11-21 17:23:37,305 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 2302 transitions. Word has length 6 [2022-11-21 17:23:37,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:23:37,305 INFO L495 AbstractCegarLoop]: Abstraction has 721 states and 2302 transitions. [2022-11-21 17:23:37,306 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) [2022-11-21 17:23:37,306 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 2302 transitions. [2022-11-21 17:23:37,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-21 17:23:37,306 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:23:37,306 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:23:37,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:23:37,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:23:37,519 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-21 17:23:37,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:23:37,519 INFO L85 PathProgramCache]: Analyzing trace with hash -52349683, now seen corresponding path program 1 times [2022-11-21 17:23:37,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:23:37,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1764148037] [2022-11-21 17:23:37,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:23:37,520 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:23:37,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:23:37,521 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:23:37,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:23:37,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:23:37,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 17:23:37,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:23:37,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:23:37,701 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 17:23:37,701 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:23:37,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1764148037] [2022-11-21 17:23:37,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1764148037] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:23:37,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:23:37,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:23:37,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111430919] [2022-11-21 17:23:37,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:23:37,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 17:23:37,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:23:37,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 17:23:37,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:23:37,703 INFO L87 Difference]: Start difference. First operand 721 states and 2302 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) [2022-11-21 17:23:38,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:23:38,579 INFO L93 Difference]: Finished difference Result 1188 states and 3674 transitions. [2022-11-21 17:23:38,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 17:23:38,580 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 [2022-11-21 17:23:38,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:23:38,584 INFO L225 Difference]: With dead ends: 1188 [2022-11-21 17:23:38,584 INFO L226 Difference]: Without dead ends: 1188 [2022-11-21 17:23:38,585 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 [2022-11-21 17:23:38,585 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 95 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-21 17:23:38,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 13 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-21 17:23:38,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2022-11-21 17:23:38,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 948. [2022-11-21 17:23:38,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 850 states have (on average 3.603529411764706) internal successors, (3063), 947 states have internal predecessors, (3063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:23:38,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 3063 transitions. [2022-11-21 17:23:38,617 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 3063 transitions. Word has length 7 [2022-11-21 17:23:38,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:23:38,618 INFO L495 AbstractCegarLoop]: Abstraction has 948 states and 3063 transitions. [2022-11-21 17:23:38,618 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) [2022-11-21 17:23:38,618 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 3063 transitions. [2022-11-21 17:23:38,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-21 17:23:38,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:23:38,619 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:23:38,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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)] Ended with exit code 0 [2022-11-21 17:23:38,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:23:38,830 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-21 17:23:38,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:23:38,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1622341199, now seen corresponding path program 1 times [2022-11-21 17:23:38,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:23:38,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [301476650] [2022-11-21 17:23:38,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:23:38,831 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:23:38,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:23:38,833 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:23:38,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:23:38,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:23:38,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 17:23:38,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:23:39,071 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-21 17:23:39,071 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 [2022-11-21 17:23:39,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:23:39,131 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 [2022-11-21 17:23:39,180 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-21 17:23:39,180 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 [2022-11-21 17:23:39,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:23:39,253 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 17:23:39,253 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:23:39,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [301476650] [2022-11-21 17:23:39,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [301476650] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:23:39,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:23:39,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 17:23:39,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759848687] [2022-11-21 17:23:39,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:23:39,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 17:23:39,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:23:39,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 17:23:39,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 17:23:39,255 INFO L87 Difference]: Start difference. First operand 948 states and 3063 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) [2022-11-21 17:23:39,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:23:39,684 INFO L93 Difference]: Finished difference Result 904 states and 2940 transitions. [2022-11-21 17:23:39,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:23:39,686 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 [2022-11-21 17:23:39,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:23:39,688 INFO L225 Difference]: With dead ends: 904 [2022-11-21 17:23:39,689 INFO L226 Difference]: Without dead ends: 904 [2022-11-21 17:23:39,689 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 [2022-11-21 17:23:39,689 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 76 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 17:23:39,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 3 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 17:23:39,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2022-11-21 17:23:39,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 904. [2022-11-21 17:23:39,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 822 states have (on average 3.576642335766423) internal successors, (2940), 903 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:23:39,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2940 transitions. [2022-11-21 17:23:39,749 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2940 transitions. Word has length 8 [2022-11-21 17:23:39,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:23:39,750 INFO L495 AbstractCegarLoop]: Abstraction has 904 states and 2940 transitions. [2022-11-21 17:23:39,751 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) [2022-11-21 17:23:39,751 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2940 transitions. [2022-11-21 17:23:39,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-21 17:23:39,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:23:39,752 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:23:39,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:23:39,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:23:39,965 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-21 17:23:39,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:23:39,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1622341198, now seen corresponding path program 1 times [2022-11-21 17:23:39,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:23:39,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [710876669] [2022-11-21 17:23:39,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:23:39,966 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:23:39,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:23:39,967 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:23:39,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:23:40,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:23:40,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-21 17:23:40,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:23:40,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:23:40,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:23:40,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:23:40,237 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-21 17:23:40,238 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 [2022-11-21 17:23:40,250 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 [2022-11-21 17:23:40,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:23:40,295 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 [2022-11-21 17:23:40,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:23:40,344 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 [2022-11-21 17:23:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:23:40,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 17:23:40,454 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:23:40,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [710876669] [2022-11-21 17:23:40,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [710876669] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:23:40,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:23:40,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:23:40,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128865252] [2022-11-21 17:23:40,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:23:40,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 17:23:40,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:23:40,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 17:23:40,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:23:40,455 INFO L87 Difference]: Start difference. First operand 904 states and 2940 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) [2022-11-21 17:23:40,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:23:40,803 INFO L93 Difference]: Finished difference Result 860 states and 2817 transitions. [2022-11-21 17:23:40,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:23:40,804 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 [2022-11-21 17:23:40,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:23:40,807 INFO L225 Difference]: With dead ends: 860 [2022-11-21 17:23:40,807 INFO L226 Difference]: Without dead ends: 860 [2022-11-21 17:23:40,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:23:40,808 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 72 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 17:23:40,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 3 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 17:23:40,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2022-11-21 17:23:40,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 860. [2022-11-21 17:23:40,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 794 states have (on average 3.547858942065491) internal successors, (2817), 859 states have internal predecessors, (2817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:23:40,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2817 transitions. [2022-11-21 17:23:40,831 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2817 transitions. Word has length 8 [2022-11-21 17:23:40,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:23:40,832 INFO L495 AbstractCegarLoop]: Abstraction has 860 states and 2817 transitions. [2022-11-21 17:23:40,832 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) [2022-11-21 17:23:40,832 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2817 transitions. [2022-11-21 17:23:40,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-21 17:23:40,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:23:40,833 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:23:40,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-21 17:23:41,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:23:41,046 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-21 17:23:41,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:23:41,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1247016924, now seen corresponding path program 1 times [2022-11-21 17:23:41,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:23:41,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [219718143] [2022-11-21 17:23:41,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:23:41,047 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:23:41,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:23:41,047 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:23:41,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:23:41,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:23:41,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 17:23:41,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:23:41,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:23:41,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 17:23:41,282 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:23:41,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [219718143] [2022-11-21 17:23:41,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [219718143] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:23:41,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:23:41,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:23:41,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153629053] [2022-11-21 17:23:41,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:23:41,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 17:23:41,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:23:41,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 17:23:41,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:23:41,284 INFO L87 Difference]: Start difference. First operand 860 states and 2817 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) [2022-11-21 17:23:42,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:23:42,171 INFO L93 Difference]: Finished difference Result 916 states and 2812 transitions. [2022-11-21 17:23:42,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 17:23:42,172 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 [2022-11-21 17:23:42,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:23:42,176 INFO L225 Difference]: With dead ends: 916 [2022-11-21 17:23:42,176 INFO L226 Difference]: Without dead ends: 916 [2022-11-21 17:23:42,177 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 [2022-11-21 17:23:42,177 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 65 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-21 17:23:42,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 13 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-21 17:23:42,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2022-11-21 17:23:42,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 858. [2022-11-21 17:23:42,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 792 states have (on average 3.4204545454545454) internal successors, (2709), 857 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:23:42,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2709 transitions. [2022-11-21 17:23:42,201 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2709 transitions. Word has length 9 [2022-11-21 17:23:42,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:23:42,202 INFO L495 AbstractCegarLoop]: Abstraction has 858 states and 2709 transitions. [2022-11-21 17:23:42,202 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) [2022-11-21 17:23:42,202 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2709 transitions. [2022-11-21 17:23:42,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-21 17:23:42,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:23:42,203 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:23:42,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:23:42,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:23:42,416 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-21 17:23:42,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:23:42,416 INFO L85 PathProgramCache]: Analyzing trace with hash -425172721, now seen corresponding path program 1 times [2022-11-21 17:23:42,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:23:42,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [231885812] [2022-11-21 17:23:42,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:23:42,417 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:23:42,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:23:42,418 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:23:42,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:23:42,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:23:42,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 17:23:42,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:23:42,723 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-21 17:23:42,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2022-11-21 17:23:42,779 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-21 17:23:42,780 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 [2022-11-21 17:23:42,808 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-21 17:23:42,808 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 [2022-11-21 17:23:42,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 17:23:42,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 17:23:42,827 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:23:42,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [231885812] [2022-11-21 17:23:42,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [231885812] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:23:42,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:23:42,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 17:23:42,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321097258] [2022-11-21 17:23:42,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:23:42,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 17:23:42,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:23:42,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 17:23:42,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 17:23:42,828 INFO L87 Difference]: Start difference. First operand 858 states and 2709 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) [2022-11-21 17:23:43,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:23:43,099 INFO L93 Difference]: Finished difference Result 684 states and 2126 transitions. [2022-11-21 17:23:43,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 17:23:43,100 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 [2022-11-21 17:23:43,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:23:43,103 INFO L225 Difference]: With dead ends: 684 [2022-11-21 17:23:43,103 INFO L226 Difference]: Without dead ends: 684 [2022-11-21 17:23:43,103 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 [2022-11-21 17:23:43,103 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 64 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 17:23:43,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 3 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 17:23:43,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-11-21 17:23:43,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 684. [2022-11-21 17:23:43,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 645 states have (on average 3.2961240310077518) internal successors, (2126), 683 states have internal predecessors, (2126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:23:43,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 2126 transitions. [2022-11-21 17:23:43,122 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 2126 transitions. Word has length 10 [2022-11-21 17:23:43,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:23:43,123 INFO L495 AbstractCegarLoop]: Abstraction has 684 states and 2126 transitions. [2022-11-21 17:23:43,123 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) [2022-11-21 17:23:43,123 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 2126 transitions. [2022-11-21 17:23:43,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-21 17:23:43,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:23:43,124 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:23:43,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-21 17:23:43,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:23:43,335 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-21 17:23:43,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:23:43,335 INFO L85 PathProgramCache]: Analyzing trace with hash -425172720, now seen corresponding path program 1 times [2022-11-21 17:23:43,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:23:43,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1315640753] [2022-11-21 17:23:43,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:23:43,336 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:23:43,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:23:43,338 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:23:43,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:23:43,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:23:43,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-21 17:23:43,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:23:43,687 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 17:23:43,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-21 17:23:43,853 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-21 17:23:43,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2022-11-21 17:23:44,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:23:44,011 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 [2022-11-21 17:23:44,023 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 17:23:44,024 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 [2022-11-21 17:23:44,096 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-21 17:23:44,096 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 [2022-11-21 17:23:44,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 17:23:44,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:23:47,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 17:23:47,113 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:23:47,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1315640753] [2022-11-21 17:23:47,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1315640753] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:23:47,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:23:47,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-21 17:23:47,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136668410] [2022-11-21 17:23:47,113 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:23:47,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 17:23:47,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:23:47,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 17:23:47,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-21 17:23:47,115 INFO L87 Difference]: Start difference. First operand 684 states and 2126 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) [2022-11-21 17:23:58,023 WARN L233 SmtUtils]: Spent 5.14s on a formula simplification. DAG size of input: 44 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 17:23:59,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 17:24:06,890 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 [1] [2022-11-21 17:24:16,158 WARN L233 SmtUtils]: Spent 5.57s on a formula simplification. DAG size of input: 51 DAG size of output: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 17:24:27,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:24:27,253 INFO L93 Difference]: Finished difference Result 4500 states and 14466 transitions. [2022-11-21 17:24:27,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-21 17:24:27,256 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 [2022-11-21 17:24:27,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:24:27,274 INFO L225 Difference]: With dead ends: 4500 [2022-11-21 17:24:27,275 INFO L226 Difference]: Without dead ends: 4500 [2022-11-21 17:24:27,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2022-11-21 17:24:27,276 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 907 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 85 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.4s IncrementalHoareTripleChecker+Time [2022-11-21 17:24:27,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [907 Valid, 52 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 555 Invalid, 1 Unknown, 0 Unchecked, 13.4s Time] [2022-11-21 17:24:27,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4500 states. [2022-11-21 17:24:27,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4500 to 1075. [2022-11-21 17:24:27,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1075 states, 1036 states have (on average 3.393822393822394) internal successors, (3516), 1074 states have internal predecessors, (3516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:24:27,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1075 states to 1075 states and 3516 transitions. [2022-11-21 17:24:27,377 INFO L78 Accepts]: Start accepts. Automaton has 1075 states and 3516 transitions. Word has length 10 [2022-11-21 17:24:27,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:24:27,377 INFO L495 AbstractCegarLoop]: Abstraction has 1075 states and 3516 transitions. [2022-11-21 17:24:27,377 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) [2022-11-21 17:24:27,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1075 states and 3516 transitions. [2022-11-21 17:24:27,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-21 17:24:27,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:24:27,380 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1] [2022-11-21 17:24:27,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:24:27,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:24:27,598 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-21 17:24:27,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:24:27,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1394031762, now seen corresponding path program 1 times [2022-11-21 17:24:27,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:24:27,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1389105306] [2022-11-21 17:24:27,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:24:27,599 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:24:27,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:24:27,600 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:24:27,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:24:27,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:24:27,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-21 17:24:27,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:24:27,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-21 17:24:28,052 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 17:24:28,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:24:29,623 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:24:29,624 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:24:29,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1389105306] [2022-11-21 17:24:29,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1389105306] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:24:29,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:24:29,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 18 [2022-11-21 17:24:29,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517122984] [2022-11-21 17:24:29,625 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:24:29,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-21 17:24:29,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:24:29,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-21 17:24:29,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-11-21 17:24:29,626 INFO L87 Difference]: Start difference. First operand 1075 states and 3516 transitions. Second operand has 19 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:24:37,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:24:40,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:24:53,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:24:53,383 INFO L93 Difference]: Finished difference Result 9919 states and 33171 transitions. [2022-11-21 17:24:53,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-21 17:24:53,385 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 [2022-11-21 17:24:53,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:24:53,423 INFO L225 Difference]: With dead ends: 9919 [2022-11-21 17:24:53,424 INFO L226 Difference]: Without dead ends: 9919 [2022-11-21 17:24:53,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2022-11-21 17:24:53,425 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 2048 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 2555 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2048 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 2750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 2555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.6s IncrementalHoareTripleChecker+Time [2022-11-21 17:24:53,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2048 Valid, 249 Invalid, 2750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 2555 Invalid, 0 Unknown, 0 Unchecked, 21.6s Time] [2022-11-21 17:24:53,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9919 states. [2022-11-21 17:24:53,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9919 to 1101. [2022-11-21 17:24:53,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1062 states have (on average 3.353107344632768) internal successors, (3561), 1100 states have internal predecessors, (3561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:24:53,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 3561 transitions. [2022-11-21 17:24:53,565 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 3561 transitions. Word has length 11 [2022-11-21 17:24:53,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:24:53,565 INFO L495 AbstractCegarLoop]: Abstraction has 1101 states and 3561 transitions. [2022-11-21 17:24:53,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.105263157894737) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:24:53,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 3561 transitions. [2022-11-21 17:24:53,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-21 17:24:53,567 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:24:53,568 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:24:53,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:24:53,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:24:53,792 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-21 17:24:53,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:24:53,792 INFO L85 PathProgramCache]: Analyzing trace with hash -295438054, now seen corresponding path program 1 times [2022-11-21 17:24:53,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:24:53,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1539751118] [2022-11-21 17:24:53,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:24:53,793 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:24:53,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:24:53,794 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:24:53,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:24:53,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:24:53,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-21 17:24:53,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:24:54,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 17:24:54,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:24:54,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 17:24:54,355 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:24:54,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1539751118] [2022-11-21 17:24:54,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1539751118] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:24:54,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:24:54,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-21 17:24:54,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172448029] [2022-11-21 17:24:54,356 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:24:54,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 17:24:54,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:24:54,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 17:24:54,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-21 17:24:54,357 INFO L87 Difference]: Start difference. First operand 1101 states and 3561 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) [2022-11-21 17:24:57,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:24:57,600 INFO L93 Difference]: Finished difference Result 1899 states and 6036 transitions. [2022-11-21 17:24:57,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 17:24:57,602 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 [2022-11-21 17:24:57,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:24:57,613 INFO L225 Difference]: With dead ends: 1899 [2022-11-21 17:24:57,613 INFO L226 Difference]: Without dead ends: 1899 [2022-11-21 17:24:57,613 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 [2022-11-21 17:24:57,614 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 303 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-21 17:24:57,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 58 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-21 17:24:57,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2022-11-21 17:24:57,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1360. [2022-11-21 17:24:57,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1321 states have (on average 3.445117335352006) internal successors, (4551), 1359 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) [2022-11-21 17:24:57,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 4551 transitions. [2022-11-21 17:24:57,656 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 4551 transitions. Word has length 11 [2022-11-21 17:24:57,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:24:57,657 INFO L495 AbstractCegarLoop]: Abstraction has 1360 states and 4551 transitions. [2022-11-21 17:24:57,657 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) [2022-11-21 17:24:57,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 4551 transitions. [2022-11-21 17:24:57,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-21 17:24:57,658 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:24:57,658 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:24:57,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:24:57,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:24:57,876 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-21 17:24:57,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:24:57,877 INFO L85 PathProgramCache]: Analyzing trace with hash 101446031, now seen corresponding path program 1 times [2022-11-21 17:24:57,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:24:57,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1838583626] [2022-11-21 17:24:57,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:24:57,878 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:24:57,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:24:57,878 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:24:57,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:24:58,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:24:58,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 17:24:58,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:24:58,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:24:58,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 17:24:58,108 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:24:58,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1838583626] [2022-11-21 17:24:58,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1838583626] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:24:58,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:24:58,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:24:58,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402290957] [2022-11-21 17:24:58,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:24:58,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 17:24:58,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:24:58,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 17:24:58,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:24:58,109 INFO L87 Difference]: Start difference. First operand 1360 states and 4551 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) [2022-11-21 17:24:58,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:24:58,692 INFO L93 Difference]: Finished difference Result 1300 states and 4306 transitions. [2022-11-21 17:24:58,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 17:24:58,693 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 [2022-11-21 17:24:58,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:24:58,696 INFO L225 Difference]: With dead ends: 1300 [2022-11-21 17:24:58,696 INFO L226 Difference]: Without dead ends: 1300 [2022-11-21 17:24:58,697 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 [2022-11-21 17:24:58,697 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 45 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-21 17:24:58,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 13 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-21 17:24:58,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2022-11-21 17:24:58,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1290. [2022-11-21 17:24:58,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 1251 states have (on average 3.434052757793765) internal successors, (4296), 1289 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:24:58,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 4296 transitions. [2022-11-21 17:24:58,747 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 4296 transitions. Word has length 11 [2022-11-21 17:24:58,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:24:58,749 INFO L495 AbstractCegarLoop]: Abstraction has 1290 states and 4296 transitions. [2022-11-21 17:24:58,749 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) [2022-11-21 17:24:58,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 4296 transitions. [2022-11-21 17:24:58,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-21 17:24:58,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:24:58,750 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-21 17:24:58,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-21 17:24:58,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:24:58,963 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-21 17:24:58,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:24:58,963 INFO L85 PathProgramCache]: Analyzing trace with hash 2094627305, now seen corresponding path program 3 times [2022-11-21 17:24:58,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:24:58,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1580816177] [2022-11-21 17:24:58,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 17:24:58,964 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:24:58,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:24:58,964 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:24:58,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:24:59,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-21 17:24:59,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:24:59,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-21 17:24:59,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:24:59,331 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 17:24:59,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-21 17:24:59,885 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:24:59,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:25:03,301 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:25:03,302 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:25:03,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1580816177] [2022-11-21 17:25:03,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1580816177] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:25:03,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:25:03,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-21 17:25:03,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772229136] [2022-11-21 17:25:03,302 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:25:03,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-21 17:25:03,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:25:03,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-21 17:25:03,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-21 17:25:03,304 INFO L87 Difference]: Start difference. First operand 1290 states and 4296 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) [2022-11-21 17:25:24,513 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 [] [2022-11-21 17:25:26,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:25:28,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:25:30,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:25:32,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:25:34,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:25:36,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:25:38,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:25:40,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:25:42,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:25:49,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:25:51,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:25:53,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:25:55,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:25:57,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:25:59,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:26:01,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:26:03,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:26:05,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:26:07,577 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 [] [2022-11-21 17:26:13,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:26:13,691 INFO L93 Difference]: Finished difference Result 8131 states and 27598 transitions. [2022-11-21 17:26:13,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-21 17:26:13,693 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 [2022-11-21 17:26:13,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:26:13,713 INFO L225 Difference]: With dead ends: 8131 [2022-11-21 17:26:13,713 INFO L226 Difference]: Without dead ends: 8131 [2022-11-21 17:26:13,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-11-21 17:26:13,714 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 2758 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 4104 mSolverCounterSat, 597 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2758 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 4721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 597 IncrementalHoareTripleChecker+Valid, 4104 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.9s IncrementalHoareTripleChecker+Time [2022-11-21 17:26:13,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2758 Valid, 393 Invalid, 4721 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [597 Valid, 4104 Invalid, 20 Unknown, 0 Unchecked, 53.9s Time] [2022-11-21 17:26:13,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8131 states. [2022-11-21 17:26:13,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8131 to 1305. [2022-11-21 17:26:13,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1305 states, 1266 states have (on average 3.414691943127962) internal successors, (4323), 1304 states have internal predecessors, (4323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:26:13,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 4323 transitions. [2022-11-21 17:26:13,837 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 4323 transitions. Word has length 12 [2022-11-21 17:26:13,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:26:13,838 INFO L495 AbstractCegarLoop]: Abstraction has 1305 states and 4323 transitions. [2022-11-21 17:26:13,838 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) [2022-11-21 17:26:13,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 4323 transitions. [2022-11-21 17:26:13,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-21 17:26:13,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:26:13,839 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:26:13,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:26:14,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:26:14,055 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-21 17:26:14,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:26:14,056 INFO L85 PathProgramCache]: Analyzing trace with hash -553637026, now seen corresponding path program 1 times [2022-11-21 17:26:14,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:26:14,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1875290763] [2022-11-21 17:26:14,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:26:14,056 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:26:14,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:26:14,057 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:26:14,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:26:14,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:26:14,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 17:26:14,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:26:14,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-21 17:26:14,306 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-21 17:26:14,306 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 [2022-11-21 17:26:14,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 17:26:14,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 17:26:14,338 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:26:14,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1875290763] [2022-11-21 17:26:14,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1875290763] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:26:14,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:26:14,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:26:14,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475271911] [2022-11-21 17:26:14,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:26:14,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 17:26:14,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:26:14,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 17:26:14,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 17:26:14,340 INFO L87 Difference]: Start difference. First operand 1305 states and 4323 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) [2022-11-21 17:26:14,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:26:14,622 INFO L93 Difference]: Finished difference Result 993 states and 3205 transitions. [2022-11-21 17:26:14,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 17:26:14,623 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 [2022-11-21 17:26:14,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:26:14,626 INFO L225 Difference]: With dead ends: 993 [2022-11-21 17:26:14,627 INFO L226 Difference]: Without dead ends: 993 [2022-11-21 17:26:14,627 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 [2022-11-21 17:26:14,628 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 57 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 17:26:14,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 3 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 17:26:14,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2022-11-21 17:26:14,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 993. [2022-11-21 17:26:14,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 970 states have (on average 3.304123711340206) internal successors, (3205), 992 states have internal predecessors, (3205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:26:14,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 3205 transitions. [2022-11-21 17:26:14,653 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 3205 transitions. Word has length 12 [2022-11-21 17:26:14,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:26:14,653 INFO L495 AbstractCegarLoop]: Abstraction has 993 states and 3205 transitions. [2022-11-21 17:26:14,653 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) [2022-11-21 17:26:14,654 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 3205 transitions. [2022-11-21 17:26:14,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-21 17:26:14,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:26:14,654 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:26:14,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:26:14,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:26:14,868 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-21 17:26:14,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:26:14,868 INFO L85 PathProgramCache]: Analyzing trace with hash -553637025, now seen corresponding path program 1 times [2022-11-21 17:26:14,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:26:14,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [173292453] [2022-11-21 17:26:14,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:26:14,869 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:26:14,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:26:14,870 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:26:14,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:26:15,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:26:15,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-21 17:26:15,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:26:15,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-21 17:26:15,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-21 17:26:15,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:26:15,312 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 [2022-11-21 17:26:15,322 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 17:26:15,323 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 [2022-11-21 17:26:15,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 17:26:15,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:26:17,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:26:18,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 17:26:18,063 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:26:18,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [173292453] [2022-11-21 17:26:18,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [173292453] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:26:18,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:26:18,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-21 17:26:18,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053465570] [2022-11-21 17:26:18,064 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:26:18,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 17:26:18,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:26:18,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 17:26:18,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=102, Unknown=1, NotChecked=0, Total=132 [2022-11-21 17:26:18,065 INFO L87 Difference]: Start difference. First operand 993 states and 3205 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) [2022-11-21 17:26:30,425 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (bvmul (_ bv4 32) |c_thread2Thread1of1ForFork0_~i~1#1|))) (let ((.cse0 (bvadd (_ bv4 32) .cse2 c_~B~0.offset)) (.cse1 (select |c_#length| c_~B~0.base)) (.cse3 (bvadd (_ bv4 32) c_~B~0.offset)) (.cse4 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv4 32)))) (and (bvule .cse0 .cse1) (= c_~N~0 |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (= (_ bv1 32) |c_ULTIMATE.start_create_fresh_int_array_~i~3#1|) (bvule (bvadd .cse2 c_~B~0.offset) .cse0) (bvule .cse3 .cse1) (bvule c_~B~0.offset .cse3) (forall ((|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_168| (_ BitVec 32))) (or (forall ((v_ArrVal_733 (_ BitVec 32))) (bvule .cse4 (select (store |c_#length| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_168| v_ArrVal_733) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (not (= (select |c_#valid| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_168|) (_ bv0 1))))) (bvule |c_ULTIMATE.start_create_fresh_int_array_~size#1| (_ bv1073741823 32)) (bvslt (bvadd (_ bv4294967295 32) |c_ULTIMATE.start_create_fresh_int_array_~i~3#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (or (forall ((|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_168| (_ BitVec 32))) (not (= (select |c_#valid| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_168|) (_ bv0 1)))) (bvule |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse4))))) is different from false [2022-11-21 17:26:37,752 WARN L233 SmtUtils]: Spent 6.53s on a formula simplification. DAG size of input: 46 DAG size of output: 45 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 17:26:40,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-21 17:26:49,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 17:26:52,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 17:26:52,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:26:52,049 INFO L93 Difference]: Finished difference Result 3603 states and 11562 transitions. [2022-11-21 17:26:52,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-21 17:26:52,054 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 [2022-11-21 17:26:52,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:26:52,063 INFO L225 Difference]: With dead ends: 3603 [2022-11-21 17:26:52,063 INFO L226 Difference]: Without dead ends: 3603 [2022-11-21 17:26:52,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=288, Invalid=836, Unknown=2, NotChecked=64, Total=1190 [2022-11-21 17:26:52,064 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 799 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 62 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 799 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2022-11-21 17:26:52,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [799 Valid, 76 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 636 Invalid, 3 Unknown, 18 Unchecked, 12.8s Time] [2022-11-21 17:26:52,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3603 states. [2022-11-21 17:26:52,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3603 to 1599. [2022-11-21 17:26:52,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1599 states, 1576 states have (on average 3.508248730964467) internal successors, (5529), 1598 states have internal predecessors, (5529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:26:52,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 5529 transitions. [2022-11-21 17:26:52,144 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 5529 transitions. Word has length 12 [2022-11-21 17:26:52,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:26:52,144 INFO L495 AbstractCegarLoop]: Abstraction has 1599 states and 5529 transitions. [2022-11-21 17:26:52,145 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) [2022-11-21 17:26:52,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 5529 transitions. [2022-11-21 17:26:52,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-21 17:26:52,146 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:26:52,146 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:26:52,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:26:52,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:26:52,369 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-21 17:26:52,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:26:52,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1887176123, now seen corresponding path program 2 times [2022-11-21 17:26:52,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:26:52,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [313897363] [2022-11-21 17:26:52,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:26:52,370 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:26:52,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:26:52,371 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:26:52,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:26:52,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-21 17:26:52,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:26:52,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-21 17:26:52,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:26:52,666 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 17:26:52,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-21 17:26:52,814 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-21 17:26:52,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-21 17:26:52,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:26:52,949 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 [2022-11-21 17:26:52,960 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 17:26:52,961 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 [2022-11-21 17:26:53,022 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-21 17:26:53,022 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 [2022-11-21 17:26:53,101 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-21 17:26:53,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 17:26:53,101 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:26:53,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [313897363] [2022-11-21 17:26:53,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [313897363] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:26:53,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:26:53,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:26:53,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031494508] [2022-11-21 17:26:53,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:26:53,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 17:26:53,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:26:53,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 17:26:53,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:26:53,103 INFO L87 Difference]: Start difference. First operand 1599 states and 5529 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) [2022-11-21 17:26:53,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:26:53,735 INFO L93 Difference]: Finished difference Result 1827 states and 6179 transitions. [2022-11-21 17:26:53,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 17:26:53,736 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 13 [2022-11-21 17:26:53,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:26:53,740 INFO L225 Difference]: With dead ends: 1827 [2022-11-21 17:26:53,740 INFO L226 Difference]: Without dead ends: 1827 [2022-11-21 17:26:53,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-21 17:26:53,741 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 93 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-21 17:26:53,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 7 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-21 17:26:53,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2022-11-21 17:26:53,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1240. [2022-11-21 17:26:53,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1217 states have (on average 3.4116680361544782) internal successors, (4152), 1239 states have internal predecessors, (4152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:26:53,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 4152 transitions. [2022-11-21 17:26:53,771 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 4152 transitions. Word has length 13 [2022-11-21 17:26:53,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:26:53,772 INFO L495 AbstractCegarLoop]: Abstraction has 1240 states and 4152 transitions. [2022-11-21 17:26:53,772 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) [2022-11-21 17:26:53,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 4152 transitions. [2022-11-21 17:26:53,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-21 17:26:53,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:26:53,773 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:26:53,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:26:53,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:26:53,985 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-21 17:26:53,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:26:53,986 INFO L85 PathProgramCache]: Analyzing trace with hash 17133774, now seen corresponding path program 1 times [2022-11-21 17:26:53,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:26:53,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [884238415] [2022-11-21 17:26:53,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:26:53,987 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:26:53,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:26:53,987 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:26:53,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:26:54,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:26:54,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-21 17:26:54,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:26:54,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 17:26:54,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:26:54,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 17:26:54,511 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:26:54,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [884238415] [2022-11-21 17:26:54,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [884238415] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:26:54,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:26:54,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-21 17:26:54,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248079199] [2022-11-21 17:26:54,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:26:54,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 17:26:54,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:26:54,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 17:26:54,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-21 17:26:54,514 INFO L87 Difference]: Start difference. First operand 1240 states and 4152 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) [2022-11-21 17:26:57,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:26:57,085 INFO L93 Difference]: Finished difference Result 1494 states and 4640 transitions. [2022-11-21 17:26:57,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 17:26:57,087 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 [2022-11-21 17:26:57,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:26:57,090 INFO L225 Difference]: With dead ends: 1494 [2022-11-21 17:26:57,090 INFO L226 Difference]: Without dead ends: 1494 [2022-11-21 17:26:57,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-11-21 17:26:57,091 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 321 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-21 17:26:57,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 61 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-21 17:26:57,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2022-11-21 17:26:57,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1235. [2022-11-21 17:26:57,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1235 states, 1212 states have (on average 3.2813531353135312) internal successors, (3977), 1234 states have internal predecessors, (3977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:26:57,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1235 states to 1235 states and 3977 transitions. [2022-11-21 17:26:57,117 INFO L78 Accepts]: Start accepts. Automaton has 1235 states and 3977 transitions. Word has length 13 [2022-11-21 17:26:57,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:26:57,118 INFO L495 AbstractCegarLoop]: Abstraction has 1235 states and 3977 transitions. [2022-11-21 17:26:57,118 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) [2022-11-21 17:26:57,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1235 states and 3977 transitions. [2022-11-21 17:26:57,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-21 17:26:57,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:26:57,119 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:26:57,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:26:57,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:26:57,322 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-21 17:26:57,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:26:57,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1226083620, now seen corresponding path program 2 times [2022-11-21 17:26:57,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:26:57,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [929519646] [2022-11-21 17:26:57,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:26:57,323 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:26:57,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:26:57,324 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:26:57,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:26:57,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 17:26:57,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:26:57,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-21 17:26:57,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:26:57,723 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-21 17:26:57,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2022-11-21 17:26:57,866 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-21 17:26:57,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2022-11-21 17:26:57,994 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-21 17:26:57,994 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 [2022-11-21 17:26:58,002 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 [2022-11-21 17:26:58,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:26:58,052 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 [2022-11-21 17:26:58,066 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 17:26:58,067 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 [2022-11-21 17:26:58,171 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 17:26:58,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:26:59,888 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 17:26:59,889 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:26:59,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [929519646] [2022-11-21 17:26:59,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [929519646] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:26:59,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:26:59,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-21 17:26:59,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873285652] [2022-11-21 17:26:59,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:26:59,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-21 17:26:59,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:26:59,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-21 17:26:59,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-11-21 17:26:59,890 INFO L87 Difference]: Start difference. First operand 1235 states and 3977 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) [2022-11-21 17:27:05,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:27:05,542 INFO L93 Difference]: Finished difference Result 2190 states and 6638 transitions. [2022-11-21 17:27:05,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 17:27:05,544 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 [2022-11-21 17:27:05,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:27:05,548 INFO L225 Difference]: With dead ends: 2190 [2022-11-21 17:27:05,548 INFO L226 Difference]: Without dead ends: 2190 [2022-11-21 17:27:05,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2022-11-21 17:27:05,549 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 736 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-21 17:27:05,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [736 Valid, 133 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1141 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-11-21 17:27:05,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2190 states. [2022-11-21 17:27:05,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2190 to 1317. [2022-11-21 17:27:05,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1317 states, 1294 states have (on average 3.364760432766615) internal successors, (4354), 1316 states have internal predecessors, (4354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:27:05,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 4354 transitions. [2022-11-21 17:27:05,578 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 4354 transitions. Word has length 14 [2022-11-21 17:27:05,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:27:05,578 INFO L495 AbstractCegarLoop]: Abstraction has 1317 states and 4354 transitions. [2022-11-21 17:27:05,578 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) [2022-11-21 17:27:05,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 4354 transitions. [2022-11-21 17:27:05,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-21 17:27:05,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:27:05,579 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:27:05,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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)] Ended with exit code 0 [2022-11-21 17:27:05,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:27:05,793 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-21 17:27:05,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:27:05,793 INFO L85 PathProgramCache]: Analyzing trace with hash 544820369, now seen corresponding path program 1 times [2022-11-21 17:27:05,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:27:05,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1719576258] [2022-11-21 17:27:05,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:27:05,794 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:27:05,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:27:05,796 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:27:05,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:27:06,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:27:06,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-21 17:27:06,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:27:06,240 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 17:27:06,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-21 17:27:06,385 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-21 17:27:06,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2022-11-21 17:27:06,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:27:06,560 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 [2022-11-21 17:27:06,574 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 17:27:06,574 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 [2022-11-21 17:27:06,631 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-21 17:27:06,631 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 [2022-11-21 17:27:06,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 17:27:06,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:27:11,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 17:27:11,731 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:27:11,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1719576258] [2022-11-21 17:27:11,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1719576258] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:27:11,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:27:11,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-21 17:27:11,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798735384] [2022-11-21 17:27:11,732 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:27:11,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 17:27:11,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:27:11,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 17:27:11,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-21 17:27:11,733 INFO L87 Difference]: Start difference. First operand 1317 states and 4354 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) [2022-11-21 17:27:18,247 WARN L233 SmtUtils]: Spent 6.26s on a formula simplification. DAG size of input: 36 DAG size of output: 35 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 17:27:33,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 17:27:35,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 17:27:52,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:27:52,417 INFO L93 Difference]: Finished difference Result 4775 states and 16776 transitions. [2022-11-21 17:27:52,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-21 17:27:52,420 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 [2022-11-21 17:27:52,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:27:52,431 INFO L225 Difference]: With dead ends: 4775 [2022-11-21 17:27:52,431 INFO L226 Difference]: Without dead ends: 4775 [2022-11-21 17:27:52,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 34.9s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2022-11-21 17:27:52,432 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 762 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 103 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-11-21 17:27:52,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [762 Valid, 52 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 470 Invalid, 1 Unknown, 0 Unchecked, 10.5s Time] [2022-11-21 17:27:52,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4775 states. [2022-11-21 17:27:52,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4775 to 1899. [2022-11-21 17:27:52,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1899 states, 1876 states have (on average 3.666311300639659) internal successors, (6878), 1898 states have internal predecessors, (6878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:27:52,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1899 states to 1899 states and 6878 transitions. [2022-11-21 17:27:52,509 INFO L78 Accepts]: Start accepts. Automaton has 1899 states and 6878 transitions. Word has length 14 [2022-11-21 17:27:52,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:27:52,509 INFO L495 AbstractCegarLoop]: Abstraction has 1899 states and 6878 transitions. [2022-11-21 17:27:52,509 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) [2022-11-21 17:27:52,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1899 states and 6878 transitions. [2022-11-21 17:27:52,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-21 17:27:52,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:27:52,511 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:27:52,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:27:52,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:27:52,724 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-21 17:27:52,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:27:52,725 INFO L85 PathProgramCache]: Analyzing trace with hash 544820794, now seen corresponding path program 1 times [2022-11-21 17:27:52,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:27:52,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [439982589] [2022-11-21 17:27:52,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:27:52,725 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 [2022-11-21 17:27:52,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:27:52,726 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:27:52,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:27:52,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:27:52,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 17:27:52,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:27:53,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 17:27:53,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:27:53,287 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 [2022-11-21 17:27:53,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 17:27:53,369 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:27:53,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [439982589] [2022-11-21 17:27:53,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [439982589] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:27:53,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:27:53,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-21 17:27:53,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948370966] [2022-11-21 17:27:53,369 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:27:53,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 17:27:53,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:27:53,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 17:27:53,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-21 17:27:53,370 INFO L87 Difference]: Start difference. First operand 1899 states and 6878 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) [2022-11-21 17:27:55,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:27:55,170 INFO L93 Difference]: Finished difference Result 2781 states and 9552 transitions. [2022-11-21 17:27:55,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 17:27:55,172 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 [2022-11-21 17:27:55,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:27:55,178 INFO L225 Difference]: With dead ends: 2781 [2022-11-21 17:27:55,178 INFO L226 Difference]: Without dead ends: 2781 [2022-11-21 17:27:55,179 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 [2022-11-21 17:27:55,179 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 295 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-21 17:27:55,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 33 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-21 17:27:55,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2781 states. [2022-11-21 17:27:55,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2781 to 2043. [2022-11-21 17:27:55,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2043 states, 2020 states have (on average 3.8504950495049504) internal successors, (7778), 2042 states have internal predecessors, (7778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:27:55,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2043 states to 2043 states and 7778 transitions. [2022-11-21 17:27:55,222 INFO L78 Accepts]: Start accepts. Automaton has 2043 states and 7778 transitions. Word has length 14 [2022-11-21 17:27:55,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:27:55,222 INFO L495 AbstractCegarLoop]: Abstraction has 2043 states and 7778 transitions. [2022-11-21 17:27:55,222 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) [2022-11-21 17:27:55,222 INFO L276 IsEmpty]: Start isEmpty. Operand 2043 states and 7778 transitions. [2022-11-21 17:27:55,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-21 17:27:55,224 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:27:55,224 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:27:55,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:27:55,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:27:55,433 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-21 17:27:55,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:27:55,433 INFO L85 PathProgramCache]: Analyzing trace with hash 544820619, now seen corresponding path program 1 times [2022-11-21 17:27:55,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:27:55,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521444270] [2022-11-21 17:27:55,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:27:55,434 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:27:55,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:27:55,435 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:27:55,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:27:55,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:27:55,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-21 17:27:55,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:27:55,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-21 17:27:55,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-21 17:27:55,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:27:55,862 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 [2022-11-21 17:27:55,872 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 17:27:55,873 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 [2022-11-21 17:27:56,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 17:27:56,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:27:56,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:27:56,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 17:27:56,593 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:27:56,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521444270] [2022-11-21 17:27:56,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [521444270] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:27:56,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:27:56,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-21 17:27:56,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883597656] [2022-11-21 17:27:56,594 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:27:56,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 17:27:56,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:27:56,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 17:27:56,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-21 17:27:56,595 INFO L87 Difference]: Start difference. First operand 2043 states and 7778 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) [2022-11-21 17:28:24,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 17:28:34,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 17:28:34,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:28:34,832 INFO L93 Difference]: Finished difference Result 3915 states and 13531 transitions. [2022-11-21 17:28:34,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-21 17:28:34,834 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 [2022-11-21 17:28:34,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:28:34,843 INFO L225 Difference]: With dead ends: 3915 [2022-11-21 17:28:34,843 INFO L226 Difference]: Without dead ends: 3915 [2022-11-21 17:28:34,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 29.2s TimeCoverageRelationStatistics Valid=332, Invalid=927, Unknown=1, NotChecked=0, Total=1260 [2022-11-21 17:28:34,844 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 572 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 55 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2022-11-21 17:28:34,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [572 Valid, 89 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 653 Invalid, 1 Unknown, 0 Unchecked, 9.4s Time] [2022-11-21 17:28:34,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3915 states. [2022-11-21 17:28:34,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3915 to 2043. [2022-11-21 17:28:34,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2043 states, 2020 states have (on average 3.6871287128712873) internal successors, (7448), 2042 states have internal predecessors, (7448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:28:34,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2043 states to 2043 states and 7448 transitions. [2022-11-21 17:28:34,925 INFO L78 Accepts]: Start accepts. Automaton has 2043 states and 7448 transitions. Word has length 14 [2022-11-21 17:28:34,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:28:34,925 INFO L495 AbstractCegarLoop]: Abstraction has 2043 states and 7448 transitions. [2022-11-21 17:28:34,926 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) [2022-11-21 17:28:34,926 INFO L276 IsEmpty]: Start isEmpty. Operand 2043 states and 7448 transitions. [2022-11-21 17:28:34,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-21 17:28:34,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:28:34,927 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:28:34,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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)] Ended with exit code 0 [2022-11-21 17:28:35,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:28:35,140 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread3Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-21 17:28:35,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:28:35,141 INFO L85 PathProgramCache]: Analyzing trace with hash 544820797, now seen corresponding path program 1 times [2022-11-21 17:28:35,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:28:35,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [126318036] [2022-11-21 17:28:35,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:28:35,142 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:28:35,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:28:35,143 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:28:35,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:28:35,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:28:35,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 17:28:35,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:28:35,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-21 17:28:35,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 17:28:35,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 17:28:35,387 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:28:35,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [126318036] [2022-11-21 17:28:35,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [126318036] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:28:35,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:28:35,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:28:35,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542211239] [2022-11-21 17:28:35,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:28:35,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 17:28:35,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:28:35,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 17:28:35,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 17:28:35,389 INFO L87 Difference]: Start difference. First operand 2043 states and 7448 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) [2022-11-21 17:28:35,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:28:35,696 INFO L93 Difference]: Finished difference Result 1901 states and 6610 transitions. [2022-11-21 17:28:35,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 17:28:35,697 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 [2022-11-21 17:28:35,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:28:35,702 INFO L225 Difference]: With dead ends: 1901 [2022-11-21 17:28:35,702 INFO L226 Difference]: Without dead ends: 1901 [2022-11-21 17:28:35,703 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 [2022-11-21 17:28:35,703 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 52 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 17:28:35,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 3 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 17:28:35,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1901 states. [2022-11-21 17:28:35,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1901 to 1901. [2022-11-21 17:28:35,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1901 states, 1882 states have (on average 3.512221041445271) internal successors, (6610), 1900 states have internal predecessors, (6610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:28:35,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1901 states to 1901 states and 6610 transitions. [2022-11-21 17:28:35,760 INFO L78 Accepts]: Start accepts. Automaton has 1901 states and 6610 transitions. Word has length 14 [2022-11-21 17:28:35,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:28:35,761 INFO L495 AbstractCegarLoop]: Abstraction has 1901 states and 6610 transitions. [2022-11-21 17:28:35,761 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) [2022-11-21 17:28:35,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1901 states and 6610 transitions. [2022-11-21 17:28:35,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-21 17:28:35,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:28:35,762 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:28:35,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-21 17:28:35,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:28:35,975 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-21 17:28:35,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:28:35,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1257818533, now seen corresponding path program 1 times [2022-11-21 17:28:35,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:28:35,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1240048316] [2022-11-21 17:28:35,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:28:35,976 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:28:35,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:28:35,977 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:28:35,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:28:36,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:28:36,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-21 17:28:36,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:28:36,360 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 17:28:36,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-21 17:28:36,484 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 [2022-11-21 17:28:36,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 17:28:36,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:28:37,040 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 17:28:37,040 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:28:37,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1240048316] [2022-11-21 17:28:37,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1240048316] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:28:37,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:28:37,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-21 17:28:37,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420323115] [2022-11-21 17:28:37,041 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:28:37,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 17:28:37,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:28:37,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 17:28:37,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-21 17:28:37,042 INFO L87 Difference]: Start difference. First operand 1901 states and 6610 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:28:38,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:28:38,989 INFO L93 Difference]: Finished difference Result 2129 states and 7761 transitions. [2022-11-21 17:28:38,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 17:28:38,990 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-21 17:28:38,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:28:38,995 INFO L225 Difference]: With dead ends: 2129 [2022-11-21 17:28:38,995 INFO L226 Difference]: Without dead ends: 2129 [2022-11-21 17:28:38,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2022-11-21 17:28:38,996 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 241 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-21 17:28:38,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 57 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-21 17:28:38,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2022-11-21 17:28:39,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 1284. [2022-11-21 17:28:39,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1284 states, 1265 states have (on average 3.540711462450593) internal successors, (4479), 1283 states have internal predecessors, (4479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:28:39,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 4479 transitions. [2022-11-21 17:28:39,026 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 4479 transitions. Word has length 15 [2022-11-21 17:28:39,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:28:39,026 INFO L495 AbstractCegarLoop]: Abstraction has 1284 states and 4479 transitions. [2022-11-21 17:28:39,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:28:39,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 4479 transitions. [2022-11-21 17:28:39,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-21 17:28:39,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:28:39,027 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:28:39,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-11-21 17:28:39,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:28:39,228 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-21 17:28:39,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:28:39,228 INFO L85 PathProgramCache]: Analyzing trace with hash 646127822, now seen corresponding path program 3 times [2022-11-21 17:28:39,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:28:39,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358726185] [2022-11-21 17:28:39,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 17:28:39,229 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:28:39,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:28:39,230 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:28:39,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:28:39,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-21 17:28:39,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:28:39,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-21 17:28:39,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:28:39,634 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 17:28:39,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-21 17:28:39,783 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-21 17:28:39,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2022-11-21 17:28:39,990 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-21 17:28:39,991 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 [2022-11-21 17:28:40,000 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 [2022-11-21 17:28:40,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:28:40,117 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 [2022-11-21 17:28:40,129 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 17:28:40,129 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 [2022-11-21 17:28:40,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 17:28:40,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:28:44,115 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 17:28:44,115 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:28:44,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358726185] [2022-11-21 17:28:44,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [358726185] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:28:44,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:28:44,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-21 17:28:44,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435563414] [2022-11-21 17:28:44,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:28:44,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 17:28:44,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:28:44,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 17:28:44,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-21 17:28:44,117 INFO L87 Difference]: Start difference. First operand 1284 states and 4479 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) [2022-11-21 17:28:58,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:28:58,059 INFO L93 Difference]: Finished difference Result 2012 states and 7209 transitions. [2022-11-21 17:28:58,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-21 17:28:58,062 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 [2022-11-21 17:28:58,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:28:58,066 INFO L225 Difference]: With dead ends: 2012 [2022-11-21 17:28:58,067 INFO L226 Difference]: Without dead ends: 2012 [2022-11-21 17:28:58,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2022-11-21 17:28:58,067 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 765 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1105 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-11-21 17:28:58,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [765 Valid, 147 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1105 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2022-11-21 17:28:58,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2012 states. [2022-11-21 17:28:58,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2012 to 1740. [2022-11-21 17:28:58,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1740 states, 1721 states have (on average 3.7460778617083093) internal successors, (6447), 1739 states have internal predecessors, (6447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:28:58,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1740 states to 1740 states and 6447 transitions. [2022-11-21 17:28:58,120 INFO L78 Accepts]: Start accepts. Automaton has 1740 states and 6447 transitions. Word has length 15 [2022-11-21 17:28:58,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:28:58,122 INFO L495 AbstractCegarLoop]: Abstraction has 1740 states and 6447 transitions. [2022-11-21 17:28:58,122 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) [2022-11-21 17:28:58,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1740 states and 6447 transitions. [2022-11-21 17:28:58,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-21 17:28:58,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:28:58,123 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:28:58,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-21 17:28:58,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:28:58,337 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-21 17:28:58,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:28:58,337 INFO L85 PathProgramCache]: Analyzing trace with hash -290423125, now seen corresponding path program 1 times [2022-11-21 17:28:58,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:28:58,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [707592962] [2022-11-21 17:28:58,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:28:58,338 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:28:58,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:28:58,339 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:28:58,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:28:58,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:28:58,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-21 17:28:58,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:28:58,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 17:28:58,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:28:59,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 17:28:59,013 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:28:59,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [707592962] [2022-11-21 17:28:59,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [707592962] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:28:59,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:28:59,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-21 17:28:59,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480009678] [2022-11-21 17:28:59,013 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:28:59,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 17:28:59,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:28:59,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 17:28:59,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-21 17:28:59,015 INFO L87 Difference]: Start difference. First operand 1740 states and 6447 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) [2022-11-21 17:29:01,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:29:01,297 INFO L93 Difference]: Finished difference Result 1662 states and 6118 transitions. [2022-11-21 17:29:01,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 17:29:01,299 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 [2022-11-21 17:29:01,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:29:01,303 INFO L225 Difference]: With dead ends: 1662 [2022-11-21 17:29:01,303 INFO L226 Difference]: Without dead ends: 1662 [2022-11-21 17:29:01,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-11-21 17:29:01,304 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 200 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-21 17:29:01,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 74 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-21 17:29:01,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2022-11-21 17:29:01,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1624. [2022-11-21 17:29:01,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1605 states have (on average 3.7725856697819315) internal successors, (6055), 1623 states have internal predecessors, (6055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:29:01,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 6055 transitions. [2022-11-21 17:29:01,343 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 6055 transitions. Word has length 15 [2022-11-21 17:29:01,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:29:01,344 INFO L495 AbstractCegarLoop]: Abstraction has 1624 states and 6055 transitions. [2022-11-21 17:29:01,344 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) [2022-11-21 17:29:01,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 6055 transitions. [2022-11-21 17:29:01,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-21 17:29:01,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:29:01,344 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:29:01,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:29:01,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:29:01,545 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-21 17:29:01,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:29:01,546 INFO L85 PathProgramCache]: Analyzing trace with hash -980057584, now seen corresponding path program 2 times [2022-11-21 17:29:01,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:29:01,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [39237763] [2022-11-21 17:29:01,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:29:01,546 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:29:01,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:29:01,547 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:29:01,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:29:01,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 17:29:01,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:29:01,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 17:29:01,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:29:01,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 17:29:01,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-21 17:29:01,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:01,881 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 [2022-11-21 17:29:01,891 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 17:29:01,891 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 [2022-11-21 17:29:02,037 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 17:29:02,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:29:05,019 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 17:29:05,019 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:29:05,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [39237763] [2022-11-21 17:29:05,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [39237763] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:29:05,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:29:05,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-21 17:29:05,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133281730] [2022-11-21 17:29:05,020 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:29:05,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 17:29:05,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:29:05,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 17:29:05,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-21 17:29:05,021 INFO L87 Difference]: Start difference. First operand 1624 states and 6055 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) [2022-11-21 17:29:08,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:29:08,648 INFO L93 Difference]: Finished difference Result 2416 states and 8842 transitions. [2022-11-21 17:29:08,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 17:29:08,649 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 [2022-11-21 17:29:08,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:29:08,654 INFO L225 Difference]: With dead ends: 2416 [2022-11-21 17:29:08,654 INFO L226 Difference]: Without dead ends: 2416 [2022-11-21 17:29:08,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2022-11-21 17:29:08,655 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 332 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-21 17:29:08,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 72 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-21 17:29:08,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2022-11-21 17:29:08,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 1862. [2022-11-21 17:29:08,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1862 states, 1843 states have (on average 3.9343461747151385) internal successors, (7251), 1861 states have internal predecessors, (7251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:29:08,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1862 states to 1862 states and 7251 transitions. [2022-11-21 17:29:08,709 INFO L78 Accepts]: Start accepts. Automaton has 1862 states and 7251 transitions. Word has length 16 [2022-11-21 17:29:08,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:29:08,709 INFO L495 AbstractCegarLoop]: Abstraction has 1862 states and 7251 transitions. [2022-11-21 17:29:08,709 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) [2022-11-21 17:29:08,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1862 states and 7251 transitions. [2022-11-21 17:29:08,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-21 17:29:08,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:29:08,711 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:29:08,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:29:08,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:29:08,912 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-21 17:29:08,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:29:08,912 INFO L85 PathProgramCache]: Analyzing trace with hash -317001667, now seen corresponding path program 3 times [2022-11-21 17:29:08,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:29:08,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1737717055] [2022-11-21 17:29:08,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 17:29:08,913 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 [2022-11-21 17:29:08,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:29:08,914 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:29:08,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:29:09,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-21 17:29:09,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:29:09,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-21 17:29:09,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:29:09,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-21 17:29:09,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-21 17:29:09,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:29:09,351 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 [2022-11-21 17:29:09,370 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 17:29:09,371 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 [2022-11-21 17:29:09,669 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 17:29:09,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:29:11,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:29:11,122 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 17:29:11,122 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:29:11,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1737717055] [2022-11-21 17:29:11,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1737717055] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:29:11,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:29:11,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-21 17:29:11,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33506490] [2022-11-21 17:29:11,123 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:29:11,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 17:29:11,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:29:11,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 17:29:11,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-11-21 17:29:11,124 INFO L87 Difference]: Start difference. First operand 1862 states and 7251 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) [2022-11-21 17:29:21,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:29:21,835 INFO L93 Difference]: Finished difference Result 3110 states and 12386 transitions. [2022-11-21 17:29:21,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-21 17:29:21,837 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 [2022-11-21 17:29:21,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:29:21,845 INFO L225 Difference]: With dead ends: 3110 [2022-11-21 17:29:21,845 INFO L226 Difference]: Without dead ends: 3110 [2022-11-21 17:29:21,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=304, Invalid=956, Unknown=0, NotChecked=0, Total=1260 [2022-11-21 17:29:21,846 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 458 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 1235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-11-21 17:29:21,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 173 Invalid, 1235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2022-11-21 17:29:21,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3110 states. [2022-11-21 17:29:21,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3110 to 2814. [2022-11-21 17:29:21,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2814 states, 2795 states have (on average 4.135599284436494) internal successors, (11559), 2813 states have internal predecessors, (11559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:29:21,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2814 states to 2814 states and 11559 transitions. [2022-11-21 17:29:21,906 INFO L78 Accepts]: Start accepts. Automaton has 2814 states and 11559 transitions. Word has length 17 [2022-11-21 17:29:21,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:29:21,906 INFO L495 AbstractCegarLoop]: Abstraction has 2814 states and 11559 transitions. [2022-11-21 17:29:21,906 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) [2022-11-21 17:29:21,906 INFO L276 IsEmpty]: Start isEmpty. Operand 2814 states and 11559 transitions. [2022-11-21 17:29:21,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-21 17:29:21,907 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:29:21,907 INFO L195 NwaCegarLoop]: trace histogram [12, 3, 1, 1, 1] [2022-11-21 17:29:21,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:29:22,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:29:22,122 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-21 17:29:22,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:29:22,122 INFO L85 PathProgramCache]: Analyzing trace with hash 789001123, now seen corresponding path program 2 times [2022-11-21 17:29:22,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:29:22,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1552858895] [2022-11-21 17:29:22,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:29:22,123 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:29:22,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:29:22,124 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:29:22,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:29:22,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 17:29:22,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:29:22,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-21 17:29:22,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:29:22,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-21 17:29:22,979 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 40 proven. 34 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-21 17:29:22,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:29:27,160 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:29:27,160 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:29:27,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1552858895] [2022-11-21 17:29:27,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1552858895] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:29:27,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:29:27,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 30 [2022-11-21 17:29:27,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065568730] [2022-11-21 17:29:27,161 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:29:27,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-21 17:29:27,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:29:27,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-21 17:29:27,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2022-11-21 17:29:27,162 INFO L87 Difference]: Start difference. First operand 2814 states and 11559 transitions. Second operand has 31 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 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) [2022-11-21 17:29:41,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:29:44,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:29:47,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:29:50,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:29:57,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:29:59,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:30:03,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 17:30:24,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:30:24,464 INFO L93 Difference]: Finished difference Result 34403 states and 149668 transitions. [2022-11-21 17:30:24,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-21 17:30:24,467 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 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 18 [2022-11-21 17:30:24,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:30:24,837 INFO L225 Difference]: With dead ends: 34403 [2022-11-21 17:30:24,838 INFO L226 Difference]: Without dead ends: 34403 [2022-11-21 17:30:24,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=518, Invalid=2452, Unknown=0, NotChecked=0, Total=2970 [2022-11-21 17:30:24,845 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1812 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 5815 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1812 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 6078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 5815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.3s IncrementalHoareTripleChecker+Time [2022-11-21 17:30:24,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1812 Valid, 636 Invalid, 6078 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [263 Valid, 5815 Invalid, 0 Unknown, 0 Unchecked, 51.3s Time] [2022-11-21 17:30:24,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34403 states. [2022-11-21 17:30:25,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34403 to 2810. [2022-11-21 17:30:25,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2810 states, 2791 states have (on average 4.135435327839484) internal successors, (11542), 2809 states have internal predecessors, (11542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:30:25,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2810 states to 2810 states and 11542 transitions. [2022-11-21 17:30:25,517 INFO L78 Accepts]: Start accepts. Automaton has 2810 states and 11542 transitions. Word has length 18 [2022-11-21 17:30:25,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:30:25,518 INFO L495 AbstractCegarLoop]: Abstraction has 2810 states and 11542 transitions. [2022-11-21 17:30:25,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.064516129032258) internal successors, (33), 30 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) [2022-11-21 17:30:25,518 INFO L276 IsEmpty]: Start isEmpty. Operand 2810 states and 11542 transitions. [2022-11-21 17:30:25,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-21 17:30:25,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:30:25,521 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:30:25,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:30:25,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:30:25,740 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-21 17:30:25,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:30:25,740 INFO L85 PathProgramCache]: Analyzing trace with hash -813611155, now seen corresponding path program 2 times [2022-11-21 17:30:25,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:30:25,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1816283269] [2022-11-21 17:30:25,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:30:25,741 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:30:25,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:30:25,742 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:30:25,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:30:26,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 17:30:26,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:30:26,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-21 17:30:26,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:30:26,293 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 17:30:26,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-21 17:30:26,439 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-21 17:30:26,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2022-11-21 17:30:26,574 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-21 17:30:26,574 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 [2022-11-21 17:30:26,583 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 [2022-11-21 17:30:26,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:26,655 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 [2022-11-21 17:30:26,666 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 17:30:26,666 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 [2022-11-21 17:30:26,842 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 17:30:26,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:30:27,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 17:30:27,964 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:30:27,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1816283269] [2022-11-21 17:30:27,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1816283269] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:30:27,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:30:27,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-21 17:30:27,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342530723] [2022-11-21 17:30:27,965 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:30:27,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 17:30:27,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:30:27,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 17:30:27,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-21 17:30:27,966 INFO L87 Difference]: Start difference. First operand 2810 states and 11542 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) [2022-11-21 17:30:30,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:30:30,205 INFO L93 Difference]: Finished difference Result 5058 states and 21139 transitions. [2022-11-21 17:30:30,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 17:30:30,207 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 [2022-11-21 17:30:30,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:30:30,221 INFO L225 Difference]: With dead ends: 5058 [2022-11-21 17:30:30,221 INFO L226 Difference]: Without dead ends: 5058 [2022-11-21 17:30:30,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-11-21 17:30:30,222 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 277 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-21 17:30:30,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 21 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-21 17:30:30,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5058 states. [2022-11-21 17:30:30,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5058 to 2805. [2022-11-21 17:30:30,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2805 states, 2786 states have (on average 4.742282842785356) internal successors, (13212), 2804 states have internal predecessors, (13212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:30:30,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2805 states to 2805 states and 13212 transitions. [2022-11-21 17:30:30,312 INFO L78 Accepts]: Start accepts. Automaton has 2805 states and 13212 transitions. Word has length 18 [2022-11-21 17:30:30,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:30:30,313 INFO L495 AbstractCegarLoop]: Abstraction has 2805 states and 13212 transitions. [2022-11-21 17:30:30,313 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) [2022-11-21 17:30:30,313 INFO L276 IsEmpty]: Start isEmpty. Operand 2805 states and 13212 transitions. [2022-11-21 17:30:30,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-21 17:30:30,314 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:30:30,314 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:30:30,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-21 17:30:30,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:30:30,514 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-21 17:30:30,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:30:30,515 INFO L85 PathProgramCache]: Analyzing trace with hash -813610730, now seen corresponding path program 1 times [2022-11-21 17:30:30,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:30:30,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2134230259] [2022-11-21 17:30:30,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:30:30,516 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:30:30,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:30:30,517 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:30:30,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:30:30,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:30:30,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-21 17:30:30,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:30:30,999 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 17:30:31,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:30:31,442 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 [2022-11-21 17:30:31,669 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 17:30:31,669 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:30:31,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2134230259] [2022-11-21 17:30:31,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2134230259] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:30:31,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:30:31,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-21 17:30:31,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356079674] [2022-11-21 17:30:31,670 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:30:31,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 17:30:31,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:30:31,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 17:30:31,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-21 17:30:31,671 INFO L87 Difference]: Start difference. First operand 2805 states and 13212 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) [2022-11-21 17:30:37,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:30:37,218 INFO L93 Difference]: Finished difference Result 9742 states and 43718 transitions. [2022-11-21 17:30:37,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-21 17:30:37,220 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 [2022-11-21 17:30:37,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:30:37,264 INFO L225 Difference]: With dead ends: 9742 [2022-11-21 17:30:37,264 INFO L226 Difference]: Without dead ends: 9742 [2022-11-21 17:30:37,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2022-11-21 17:30:37,265 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 681 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-21 17:30:37,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [681 Valid, 89 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-11-21 17:30:37,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9742 states. [2022-11-21 17:30:37,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9742 to 2805. [2022-11-21 17:30:37,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2805 states, 2786 states have (on average 4.662598707824839) internal successors, (12990), 2804 states have internal predecessors, (12990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:30:37,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2805 states to 2805 states and 12990 transitions. [2022-11-21 17:30:37,500 INFO L78 Accepts]: Start accepts. Automaton has 2805 states and 12990 transitions. Word has length 18 [2022-11-21 17:30:37,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:30:37,501 INFO L495 AbstractCegarLoop]: Abstraction has 2805 states and 12990 transitions. [2022-11-21 17:30:37,501 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) [2022-11-21 17:30:37,501 INFO L276 IsEmpty]: Start isEmpty. Operand 2805 states and 12990 transitions. [2022-11-21 17:30:37,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-21 17:30:37,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:30:37,504 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:30:37,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:30:37,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:30:37,717 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-21 17:30:37,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:30:37,718 INFO L85 PathProgramCache]: Analyzing trace with hash -813610905, now seen corresponding path program 1 times [2022-11-21 17:30:37,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:30:37,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1645255032] [2022-11-21 17:30:37,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:30:37,719 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:30:37,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:30:37,720 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:30:37,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:30:38,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:30:38,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-21 17:30:38,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:30:38,353 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 17:30:38,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-21 17:30:38,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-21 17:30:38,487 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-21 17:30:38,488 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 [2022-11-21 17:30:38,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:30:38,641 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-21 17:30:38,641 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 21 treesize of output 30 [2022-11-21 17:30:38,663 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 17:30:38,664 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 [2022-11-21 17:30:38,997 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 17:30:38,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:30:39,615 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 [2022-11-21 17:30:40,016 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 17:30:40,016 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:30:40,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1645255032] [2022-11-21 17:30:40,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1645255032] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:30:40,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:30:40,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-21 17:30:40,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469709232] [2022-11-21 17:30:40,017 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:30:40,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-21 17:30:40,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:30:40,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-21 17:30:40,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-11-21 17:30:40,018 INFO L87 Difference]: Start difference. First operand 2805 states and 12990 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) [2022-11-21 17:30:47,537 WARN L233 SmtUtils]: Spent 6.37s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 17:30:54,399 WARN L233 SmtUtils]: Spent 6.27s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 17:31:00,728 WARN L233 SmtUtils]: Spent 6.22s on a formula simplification. DAG size of input: 55 DAG size of output: 41 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 17:31:15,321 WARN L233 SmtUtils]: Spent 6.32s on a formula simplification. DAG size of input: 62 DAG size of output: 48 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 17:31:17,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 17:31:23,886 WARN L233 SmtUtils]: Spent 6.33s on a formula simplification. DAG size of input: 55 DAG size of output: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 17:31:26,715 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse4 (bvadd (_ bv8 32) c_~B~0.offset)) (.cse3 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv8 32))) (.cse1 (bvmul (_ bv4 32) |c_ULTIMATE.start_create_fresh_int_array_~i~3#1|)) (.cse2 (select |c_#length| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse0 (forall ((|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_203| (_ BitVec 32)) (v_ArrVal_1719 (_ BitVec 32)) (|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_204| (_ BitVec 32))) (or (bvule (_ bv8 32) (select (store (store |c_#length| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_204| (bvmul c_~N~0 (_ bv4 32))) |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_203| v_ArrVal_1719) |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_204|)) (= |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_203| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_204|))))) (and (or .cse0 (not (bvule (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv8 32) .cse1) .cse2)) (bvslt (bvadd (_ bv2 32) |c_ULTIMATE.start_create_fresh_int_array_~i~3#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|)) (forall ((|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_203| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_203|))) (forall ((v_ArrVal_1719 (_ BitVec 32))) (bvule .cse3 (select (store |c_#length| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_203| v_ArrVal_1719) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))))) (bvule .cse4 (select |c_#length| c_~B~0.base)) (or .cse0 (bvslt |c_ULTIMATE.start_create_fresh_int_array_~i~3#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|)) (bvule (bvadd (_ bv4 32) c_~B~0.offset) .cse4) (or (bvule (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv4 32)) .cse3) (forall ((|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_203| (_ BitVec 32))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_203|))))) (or (bvslt (bvadd (_ bv1 32) |c_ULTIMATE.start_create_fresh_int_array_~i~3#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (not (bvule (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv4 32) .cse1) .cse2)) .cse0))) is different from false [2022-11-21 17:31:35,755 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 [0, 1] [2022-11-21 17:31:39,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:31:39,394 INFO L93 Difference]: Finished difference Result 11526 states and 52392 transitions. [2022-11-21 17:31:39,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-21 17:31:39,397 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 [2022-11-21 17:31:39,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:31:39,438 INFO L225 Difference]: With dead ends: 11526 [2022-11-21 17:31:39,438 INFO L226 Difference]: Without dead ends: 11526 [2022-11-21 17:31:39,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 48.7s TimeCoverageRelationStatistics Valid=462, Invalid=1703, Unknown=1, NotChecked=90, Total=2256 [2022-11-21 17:31:39,439 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 918 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 104 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2022-11-21 17:31:39,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [918 Valid, 117 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1017 Invalid, 1 Unknown, 2 Unchecked, 11.4s Time] [2022-11-21 17:31:39,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11526 states. [2022-11-21 17:31:39,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11526 to 3695. [2022-11-21 17:31:39,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3695 states, 3676 states have (on average 4.454842219804135) internal successors, (16376), 3694 states have internal predecessors, (16376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:31:39,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3695 states to 3695 states and 16376 transitions. [2022-11-21 17:31:39,600 INFO L78 Accepts]: Start accepts. Automaton has 3695 states and 16376 transitions. Word has length 18 [2022-11-21 17:31:39,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:31:39,600 INFO L495 AbstractCegarLoop]: Abstraction has 3695 states and 16376 transitions. [2022-11-21 17:31:39,600 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) [2022-11-21 17:31:39,601 INFO L276 IsEmpty]: Start isEmpty. Operand 3695 states and 16376 transitions. [2022-11-21 17:31:39,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-21 17:31:39,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:31:39,603 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:31:39,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:31:39,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:31:39,812 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-21 17:31:39,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:31:39,812 INFO L85 PathProgramCache]: Analyzing trace with hash 363578446, now seen corresponding path program 4 times [2022-11-21 17:31:39,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:31:39,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [959080755] [2022-11-21 17:31:39,813 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 17:31:39,813 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:31:39,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:31:39,814 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:31:39,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:31:40,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 17:31:40,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:31:40,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-21 17:31:40,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:31:40,315 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 17:31:40,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-21 17:31:40,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-21 17:31:40,642 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-21 17:31:40,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:31:41,081 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-21 17:31:41,081 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:31:41,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [959080755] [2022-11-21 17:31:41,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [959080755] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:31:41,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:31:41,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-21 17:31:41,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130385497] [2022-11-21 17:31:41,082 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:31:41,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-21 17:31:41,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:31:41,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-21 17:31:41,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-11-21 17:31:41,083 INFO L87 Difference]: Start difference. First operand 3695 states and 16376 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) [2022-11-21 17:31:46,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:31:46,527 INFO L93 Difference]: Finished difference Result 4658 states and 20239 transitions. [2022-11-21 17:31:46,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-21 17:31:46,529 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 [2022-11-21 17:31:46,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:31:46,544 INFO L225 Difference]: With dead ends: 4658 [2022-11-21 17:31:46,544 INFO L226 Difference]: Without dead ends: 4658 [2022-11-21 17:31:46,544 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 [2022-11-21 17:31:46,544 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 411 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 1328 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-21 17:31:46,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 192 Invalid, 1385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1328 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-11-21 17:31:46,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4658 states. [2022-11-21 17:31:46,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4658 to 4172. [2022-11-21 17:31:46,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4172 states, 4153 states have (on average 4.45027690825909) internal successors, (18482), 4171 states have internal predecessors, (18482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:31:46,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4172 states to 4172 states and 18482 transitions. [2022-11-21 17:31:46,641 INFO L78 Accepts]: Start accepts. Automaton has 4172 states and 18482 transitions. Word has length 19 [2022-11-21 17:31:46,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:31:46,641 INFO L495 AbstractCegarLoop]: Abstraction has 4172 states and 18482 transitions. [2022-11-21 17:31:46,642 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) [2022-11-21 17:31:46,642 INFO L276 IsEmpty]: Start isEmpty. Operand 4172 states and 18482 transitions. [2022-11-21 17:31:46,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-21 17:31:46,643 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:31:46,643 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:31:46,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:31:46,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:31:46,855 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-21 17:31:46,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:31:46,855 INFO L85 PathProgramCache]: Analyzing trace with hash 547873016, now seen corresponding path program 2 times [2022-11-21 17:31:46,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:31:46,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1293174673] [2022-11-21 17:31:46,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:31:46,856 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:31:46,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:31:46,857 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:31:46,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:31:47,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-21 17:31:47,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:31:47,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-21 17:31:47,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:31:47,159 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 8 treesize of output 7 [2022-11-21 17:31:47,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-21 17:31:47,255 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-21 17:31:47,256 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 [2022-11-21 17:31:47,264 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 [2022-11-21 17:31:47,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-21 17:31:47,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 17:31:47,547 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:31:47,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1293174673] [2022-11-21 17:31:47,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1293174673] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:31:47,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:31:47,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 17:31:47,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758703152] [2022-11-21 17:31:47,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:31:47,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 17:31:47,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:31:47,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 17:31:47,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:31:47,549 INFO L87 Difference]: Start difference. First operand 4172 states and 18482 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) [2022-11-21 17:31:48,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:31:48,028 INFO L93 Difference]: Finished difference Result 3870 states and 16634 transitions. [2022-11-21 17:31:48,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 17:31:48,029 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 [2022-11-21 17:31:48,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:31:48,040 INFO L225 Difference]: With dead ends: 3870 [2022-11-21 17:31:48,040 INFO L226 Difference]: Without dead ends: 3870 [2022-11-21 17:31:48,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-21 17:31:48,040 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 76 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 17:31:48,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 3 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 17:31:48,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3870 states. [2022-11-21 17:31:48,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3870 to 3870. [2022-11-21 17:31:48,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3870 states, 3855 states have (on average 4.3149156939040205) internal successors, (16634), 3869 states have internal predecessors, (16634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:31:48,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3870 states to 3870 states and 16634 transitions. [2022-11-21 17:31:48,121 INFO L78 Accepts]: Start accepts. Automaton has 3870 states and 16634 transitions. Word has length 19 [2022-11-21 17:31:48,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:31:48,122 INFO L495 AbstractCegarLoop]: Abstraction has 3870 states and 16634 transitions. [2022-11-21 17:31:48,122 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) [2022-11-21 17:31:48,122 INFO L276 IsEmpty]: Start isEmpty. Operand 3870 states and 16634 transitions. [2022-11-21 17:31:48,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-21 17:31:48,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:31:48,124 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:31:48,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-21 17:31:48,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:31:48,338 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-21 17:31:48,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:31:48,338 INFO L85 PathProgramCache]: Analyzing trace with hash 547872841, now seen corresponding path program 2 times [2022-11-21 17:31:48,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:31:48,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1885306159] [2022-11-21 17:31:48,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:31:48,339 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:31:48,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:31:48,340 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:31:48,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:31:48,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-21 17:31:48,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:31:48,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-21 17:31:48,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:31:48,741 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 17:31:48,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-21 17:31:48,893 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-21 17:31:48,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2022-11-21 17:31:49,006 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-21 17:31:49,006 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 [2022-11-21 17:31:49,022 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 [2022-11-21 17:31:49,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:31:49,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:31:49,143 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 [2022-11-21 17:31:49,179 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-21 17:31:49,180 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 [2022-11-21 17:31:49,759 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-21 17:31:49,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 17:31:49,759 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:31:49,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1885306159] [2022-11-21 17:31:49,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1885306159] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:31:49,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:31:49,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:31:49,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530514514] [2022-11-21 17:31:49,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:31:49,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 17:31:49,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:31:49,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 17:31:49,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:31:49,761 INFO L87 Difference]: Start difference. First operand 3870 states and 16634 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) [2022-11-21 17:31:50,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:31:50,295 INFO L93 Difference]: Finished difference Result 3568 states and 14786 transitions. [2022-11-21 17:31:50,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 17:31:50,297 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 [2022-11-21 17:31:50,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:31:50,307 INFO L225 Difference]: With dead ends: 3568 [2022-11-21 17:31:50,307 INFO L226 Difference]: Without dead ends: 3568 [2022-11-21 17:31:50,307 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 [2022-11-21 17:31:50,308 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 76 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-21 17:31:50,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 3 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-21 17:31:50,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3568 states. [2022-11-21 17:31:50,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3568 to 3568. [2022-11-21 17:31:50,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3568 states, 3557 states have (on average 4.156873770030925) internal successors, (14786), 3567 states have internal predecessors, (14786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:31:50,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3568 states to 3568 states and 14786 transitions. [2022-11-21 17:31:50,377 INFO L78 Accepts]: Start accepts. Automaton has 3568 states and 14786 transitions. Word has length 19 [2022-11-21 17:31:50,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:31:50,377 INFO L495 AbstractCegarLoop]: Abstraction has 3568 states and 14786 transitions. [2022-11-21 17:31:50,377 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) [2022-11-21 17:31:50,377 INFO L276 IsEmpty]: Start isEmpty. Operand 3568 states and 14786 transitions. [2022-11-21 17:31:50,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-21 17:31:50,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:31:50,379 INFO L195 NwaCegarLoop]: trace histogram [13, 4, 1, 1, 1] [2022-11-21 17:31:50,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-21 17:31:50,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:31:50,595 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-21 17:31:50,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:31:50,595 INFO L85 PathProgramCache]: Analyzing trace with hash 808829413, now seen corresponding path program 3 times [2022-11-21 17:31:50,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:31:50,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1469153565] [2022-11-21 17:31:50,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 17:31:50,595 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:31:50,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:31:50,596 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-21 17:31:50,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2b0d173-597c-4d02-b917-979008e9cbcc/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 17:31:51,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-21 17:31:51,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:31:51,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-21 17:31:51,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:31:51,202 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-21 17:31:51,202 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 17 treesize of output 44 [2022-11-21 17:31:51,452 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-21 17:31:51,452 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 [2022-11-21 17:31:51,755 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-21 17:31:51,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:32:09,538 WARN L233 SmtUtils]: Spent 6.14s on a formula simplification that was a NOOP. DAG size: 35 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 17:32:20,983 WARN L233 SmtUtils]: Spent 6.22s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 17:32:35,378 WARN L233 SmtUtils]: Spent 6.18s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 17:32:48,626 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 40 proven. 33 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-21 17:32:48,626 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:32:48,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1469153565] [2022-11-21 17:32:48,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1469153565] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:32:48,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:32:48,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 23 [2022-11-21 17:32:48,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048203748] [2022-11-21 17:32:48,627 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:32:48,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-21 17:32:48,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:32:48,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-21 17:32:48,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=438, Unknown=10, NotChecked=0, Total=552 [2022-11-21 17:32:48,628 INFO L87 Difference]: Start difference. First operand 3568 states and 14786 transitions. Second operand has 24 states, 24 states have (on average 1.125) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:33:10,104 WARN L233 SmtUtils]: Spent 8.59s on a formula simplification. DAG size of input: 52 DAG size of output: 38 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 17:33:25,245 WARN L233 SmtUtils]: Spent 9.16s on a formula simplification. DAG size of input: 47 DAG size of output: 38 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 17:33:47,398 WARN L233 SmtUtils]: Spent 16.84s on a formula simplification. DAG size of input: 76 DAG size of output: 37 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 17:34:05,978 WARN L233 SmtUtils]: Spent 18.24s on a formula simplification. DAG size of input: 42 DAG size of output: 38 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 17:34:23,906 WARN L233 SmtUtils]: Spent 11.38s on a formula simplification. DAG size of input: 73 DAG size of output: 38 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 17:34:25,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 17:34:47,176 WARN L233 SmtUtils]: Spent 12.84s on a formula simplification. DAG size of input: 69 DAG size of output: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 17:35:06,541 WARN L233 SmtUtils]: Spent 17.07s on a formula simplification. DAG size of input: 81 DAG size of output: 37 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 17:35:22,872 WARN L233 SmtUtils]: Spent 15.49s on a formula simplification. DAG size of input: 78 DAG size of output: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 17:35:47,596 WARN L233 SmtUtils]: Spent 23.05s on a formula simplification. DAG size of input: 83 DAG size of output: 37 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 17:35:49,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 17:35:54,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 17:35:57,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 17:36:00,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 17:36:02,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 17:36:05,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 17:36:07,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 17:36:09,791 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 [1]