./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 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_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b78a1de0122078b80177387d59eedcdf8d73ccef913955b4bda0200e53e1d3da --- 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-4e7fbc6 [2022-11-23 13:46:48,834 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 13:46:48,836 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 13:46:48,870 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 13:46:48,872 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 13:46:48,874 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 13:46:48,878 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 13:46:48,883 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 13:46:48,886 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 13:46:48,888 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 13:46:48,890 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 13:46:48,894 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 13:46:48,895 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 13:46:48,899 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 13:46:48,901 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 13:46:48,904 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 13:46:48,907 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 13:46:48,913 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 13:46:48,915 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 13:46:48,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 13:46:48,922 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 13:46:48,925 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 13:46:48,926 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 13:46:48,927 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 13:46:48,937 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 13:46:48,941 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 13:46:48,941 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 13:46:48,943 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 13:46:48,944 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 13:46:48,947 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 13:46:48,948 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 13:46:48,949 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 13:46:48,951 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 13:46:48,953 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 13:46:48,955 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 13:46:48,956 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 13:46:48,957 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 13:46:48,957 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 13:46:48,957 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 13:46:48,958 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 13:46:48,959 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 13:46:48,960 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-23 13:46:49,005 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 13:46:49,006 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 13:46:49,007 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 13:46:49,008 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 13:46:49,009 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 13:46:49,009 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 13:46:49,010 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 13:46:49,010 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 13:46:49,010 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 13:46:49,011 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 13:46:49,012 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 13:46:49,012 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 13:46:49,013 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 13:46:49,013 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 13:46:49,013 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 13:46:49,014 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 13:46:49,014 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 13:46:49,014 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 13:46:49,016 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 13:46:49,016 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 13:46:49,016 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 13:46:49,017 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 13:46:49,017 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 13:46:49,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 13:46:49,018 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 13:46:49,018 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 13:46:49,018 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 13:46:49,019 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 13:46:49,019 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 13:46:49,019 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 13:46:49,020 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 13:46:49,020 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 13:46:49,020 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 13:46:49,021 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 13:46:49,021 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 13:46:49,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:46:49,022 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 13:46:49,022 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 13:46:49,022 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 13:46:49,023 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 13:46:49,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 13:46:49,023 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 13:46:49,024 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_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b78a1de0122078b80177387d59eedcdf8d73ccef913955b4bda0200e53e1d3da [2022-11-23 13:46:49,378 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 13:46:49,406 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 13:46:49,409 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 13:46:49,411 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 13:46:49,414 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 13:46:49,416 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2022-11-23 13:46:52,702 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 13:46:52,963 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 13:46:52,964 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2022-11-23 13:46:52,974 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/data/fd9ca9ae9/f4bcb25e0deb4aaa9a9a256230a70348/FLAGc4899941c [2022-11-23 13:46:52,993 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/data/fd9ca9ae9/f4bcb25e0deb4aaa9a9a256230a70348 [2022-11-23 13:46:52,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 13:46:52,997 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 13:46:53,003 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 13:46:53,003 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 13:46:53,008 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 13:46:53,009 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:46:52" (1/1) ... [2022-11-23 13:46:53,010 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26bd567e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:53, skipping insertion in model container [2022-11-23 13:46:53,010 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:46:52" (1/1) ... [2022-11-23 13:46:53,018 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 13:46:53,039 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 13:46:53,261 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_a09857da-b54a-4d03-bc5d-46686fd093f0/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c[2482,2495] [2022-11-23 13:46:53,273 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:46:53,287 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) [2022-11-23 13:46:53,287 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2ad8820f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:46:53, skipping insertion in model container [2022-11-23 13:46:53,287 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 13:46:53,288 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-23 13:46:53,290 INFO L158 Benchmark]: Toolchain (without parser) took 291.61ms. Allocated memory was 138.4MB in the beginning and 184.5MB in the end (delta: 46.1MB). Free memory was 74.3MB in the beginning and 153.0MB in the end (delta: -78.7MB). Peak memory consumption was 11.8MB. Max. memory is 16.1GB. [2022-11-23 13:46:53,291 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 138.4MB. Free memory is still 106.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 13:46:53,292 INFO L158 Benchmark]: CACSL2BoogieTranslator took 284.75ms. Allocated memory was 138.4MB in the beginning and 184.5MB in the end (delta: 46.1MB). Free memory was 74.2MB in the beginning and 153.0MB in the end (delta: -78.8MB). Peak memory consumption was 11.8MB. Max. memory is 16.1GB. [2022-11-23 13:46:53,293 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 138.4MB. Free memory is still 106.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 284.75ms. Allocated memory was 138.4MB in the beginning and 184.5MB in the end (delta: 46.1MB). Free memory was 74.2MB in the beginning and 153.0MB in the end (delta: -78.8MB). Peak memory consumption was 11.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 101]: 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_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b78a1de0122078b80177387d59eedcdf8d73ccef913955b4bda0200e53e1d3da --- 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-4e7fbc6 [2022-11-23 13:46:55,847 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 13:46:55,850 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 13:46:55,895 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 13:46:55,896 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 13:46:55,900 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 13:46:55,904 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 13:46:55,908 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 13:46:55,911 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 13:46:55,918 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 13:46:55,919 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 13:46:55,922 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 13:46:55,923 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 13:46:55,926 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 13:46:55,927 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 13:46:55,935 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 13:46:55,937 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 13:46:55,938 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 13:46:55,939 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 13:46:55,941 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 13:46:55,943 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 13:46:55,945 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 13:46:55,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 13:46:55,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 13:46:55,951 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 13:46:55,951 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 13:46:55,952 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 13:46:55,953 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 13:46:55,954 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 13:46:55,955 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 13:46:55,955 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 13:46:55,956 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 13:46:55,957 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 13:46:55,958 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 13:46:55,960 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 13:46:55,960 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 13:46:55,961 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 13:46:55,962 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 13:46:55,962 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 13:46:55,963 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 13:46:55,964 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 13:46:55,970 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-23 13:46:56,015 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 13:46:56,016 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 13:46:56,016 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 13:46:56,016 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 13:46:56,017 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 13:46:56,017 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 13:46:56,017 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 13:46:56,018 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 13:46:56,018 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 13:46:56,018 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 13:46:56,018 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 13:46:56,018 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 13:46:56,019 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 13:46:56,019 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 13:46:56,020 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 13:46:56,020 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 13:46:56,020 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 13:46:56,020 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 13:46:56,021 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 13:46:56,021 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 13:46:56,021 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 13:46:56,021 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 13:46:56,021 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 13:46:56,022 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 13:46:56,022 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 13:46:56,022 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-23 13:46:56,022 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-23 13:46:56,022 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 13:46:56,025 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 13:46:56,025 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 13:46:56,025 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 13:46:56,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 13:46:56,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:46:56,026 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 13:46:56,027 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 13:46:56,027 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-23 13:46:56,028 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-23 13:46:56,028 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 13:46:56,028 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 13:46:56,029 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_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b78a1de0122078b80177387d59eedcdf8d73ccef913955b4bda0200e53e1d3da [2022-11-23 13:46:56,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 13:46:56,518 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 13:46:56,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 13:46:56,525 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 13:46:56,526 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 13:46:56,528 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2022-11-23 13:46:59,743 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 13:47:00,004 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 13:47:00,004 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2022-11-23 13:47:00,012 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/data/70c29f53c/d30ede8904184139936e20d939d50bd0/FLAG02ee3f43c [2022-11-23 13:47:00,026 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/data/70c29f53c/d30ede8904184139936e20d939d50bd0 [2022-11-23 13:47:00,029 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 13:47:00,031 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 13:47:00,032 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 13:47:00,032 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 13:47:00,037 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 13:47:00,038 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:47:00" (1/1) ... [2022-11-23 13:47:00,039 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35cb99b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:00, skipping insertion in model container [2022-11-23 13:47:00,039 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:47:00" (1/1) ... [2022-11-23 13:47:00,048 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 13:47:00,072 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 13:47:00,369 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_a09857da-b54a-4d03-bc5d-46686fd093f0/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c[2482,2495] [2022-11-23 13:47:00,402 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:47:00,424 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-23 13:47:00,438 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 13:47:00,464 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_a09857da-b54a-4d03-bc5d-46686fd093f0/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c[2482,2495] [2022-11-23 13:47:00,483 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:47:00,496 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 13:47:00,546 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_a09857da-b54a-4d03-bc5d-46686fd093f0/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c[2482,2495] [2022-11-23 13:47:00,551 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:47:00,573 INFO L208 MainTranslator]: Completed translation [2022-11-23 13:47:00,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:00 WrapperNode [2022-11-23 13:47:00,574 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 13:47:00,576 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 13:47:00,576 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 13:47:00,576 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 13:47:00,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:00" (1/1) ... [2022-11-23 13:47:00,616 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:00" (1/1) ... [2022-11-23 13:47:00,690 INFO L138 Inliner]: procedures = 27, calls = 39, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 192 [2022-11-23 13:47:00,691 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 13:47:00,693 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 13:47:00,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 13:47:00,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 13:47:00,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:00" (1/1) ... [2022-11-23 13:47:00,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:00" (1/1) ... [2022-11-23 13:47:00,731 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:00" (1/1) ... [2022-11-23 13:47:00,731 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:00" (1/1) ... [2022-11-23 13:47:00,741 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:00" (1/1) ... [2022-11-23 13:47:00,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:00" (1/1) ... [2022-11-23 13:47:00,761 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:00" (1/1) ... [2022-11-23 13:47:00,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:00" (1/1) ... [2022-11-23 13:47:00,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 13:47:00,776 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 13:47:00,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 13:47:00,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 13:47:00,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:00" (1/1) ... [2022-11-23 13:47:00,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:47:00,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:47:00,820 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 13:47:00,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 13:47:00,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 13:47:00,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-23 13:47:00,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 13:47:00,878 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-23 13:47:00,878 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-23 13:47:00,878 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-23 13:47:00,879 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-23 13:47:00,879 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-23 13:47:00,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 13:47:00,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 13:47:00,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 13:47:00,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 13:47:00,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-23 13:47:00,881 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 13:47:01,047 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 13:47:01,049 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 13:47:01,970 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 13:47:01,983 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 13:47:01,983 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-23 13:47:01,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:47:01 BoogieIcfgContainer [2022-11-23 13:47:01,986 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 13:47:01,989 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 13:47:01,989 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 13:47:02,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 13:47:02,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:47:00" (1/3) ... [2022-11-23 13:47:02,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ee5514e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:47:02, skipping insertion in model container [2022-11-23 13:47:02,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:00" (2/3) ... [2022-11-23 13:47:02,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ee5514e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:47:02, skipping insertion in model container [2022-11-23 13:47:02,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:47:01" (3/3) ... [2022-11-23 13:47:02,009 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-symm.wvr.c [2022-11-23 13:47:02,036 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 13:47:02,036 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2022-11-23 13:47:02,037 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 13:47:02,304 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-23 13:47:02,367 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 13:47:02,393 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 270 places, 284 transitions, 584 flow [2022-11-23 13:47:02,399 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 270 places, 284 transitions, 584 flow [2022-11-23 13:47:02,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 270 places, 284 transitions, 584 flow [2022-11-23 13:47:02,567 INFO L130 PetriNetUnfolder]: 21/282 cut-off events. [2022-11-23 13:47:02,568 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 13:47:02,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 291 conditions, 282 events. 21/282 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 517 event pairs, 0 based on Foata normal form. 0/231 useless extension candidates. Maximal degree in co-relation 177. Up to 3 conditions per place. [2022-11-23 13:47:02,588 INFO L119 LiptonReduction]: Number of co-enabled transitions 9120 [2022-11-23 13:47:45,639 INFO L134 LiptonReduction]: Checked pairs total: 12270 [2022-11-23 13:47:45,640 INFO L136 LiptonReduction]: Total number of compositions: 335 [2022-11-23 13:47:45,649 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 57 places, 55 transitions, 126 flow [2022-11-23 13:47:45,738 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 729 states, 443 states have (on average 4.417607223476298) internal successors, (1957), 728 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:45,761 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 13:47:45,769 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;@4dcd7995, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 13:47:45,769 INFO L358 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2022-11-23 13:47:45,775 INFO L276 IsEmpty]: Start isEmpty. Operand has 729 states, 443 states have (on average 4.417607223476298) internal successors, (1957), 728 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:45,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-23 13:47:45,781 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:47:45,782 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-23 13:47:45,783 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:47:45,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:47:45,789 INFO L85 PathProgramCache]: Analyzing trace with hash 36011, now seen corresponding path program 1 times [2022-11-23 13:47:45,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:47:45,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1318724081] [2022-11-23 13:47:45,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:47:45,807 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:47:45,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:47:45,813 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:47:45,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 13:47:45,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:47:45,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 13:47:45,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:47:46,142 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 13:47:46,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 13:47:46,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:47:46,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:47:46,185 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:47:46,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1318724081] [2022-11-23 13:47:46,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1318724081] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:47:46,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:47:46,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 13:47:46,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683687213] [2022-11-23 13:47:46,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:47:46,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:47:46,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:47:46,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:47:46,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:47:46,262 INFO L87 Difference]: Start difference. First operand has 729 states, 443 states have (on average 4.417607223476298) internal successors, (1957), 728 states have internal predecessors, (1957), 0 states have call successors, (0), 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) [2022-11-23 13:47:46,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:47:46,666 INFO L93 Difference]: Finished difference Result 486 states and 1290 transitions. [2022-11-23 13:47:46,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:47:46,669 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 [2022-11-23 13:47:46,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:47:46,698 INFO L225 Difference]: With dead ends: 486 [2022-11-23 13:47:46,700 INFO L226 Difference]: Without dead ends: 486 [2022-11-23 13:47:46,702 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 [2022-11-23 13:47:46,710 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 43 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 13:47:46,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 0 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 13:47:46,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-11-23 13:47:46,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 486. [2022-11-23 13:47:46,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 319 states have (on average 4.043887147335423) internal successors, (1290), 485 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:46,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1290 transitions. [2022-11-23 13:47:46,848 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1290 transitions. Word has length 2 [2022-11-23 13:47:46,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:47:46,848 INFO L495 AbstractCegarLoop]: Abstraction has 486 states and 1290 transitions. [2022-11-23 13:47:46,850 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) [2022-11-23 13:47:46,851 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1290 transitions. [2022-11-23 13:47:46,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-23 13:47:46,851 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:47:46,851 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-23 13:47:46,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-23 13:47:47,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:47:47,066 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:47:47,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:47:47,067 INFO L85 PathProgramCache]: Analyzing trace with hash 36012, now seen corresponding path program 1 times [2022-11-23 13:47:47,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:47:47,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1176756966] [2022-11-23 13:47:47,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:47:47,068 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:47:47,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:47:47,103 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:47:47,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 13:47:47,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:47:47,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 13:47:47,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:47:47,433 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 13:47:47,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 13:47:47,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:47:47,480 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:47:47,480 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:47:47,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1176756966] [2022-11-23 13:47:47,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1176756966] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:47:47,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:47:47,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 13:47:47,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491439920] [2022-11-23 13:47:47,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:47:47,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:47:47,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:47:47,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:47:47,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:47:47,484 INFO L87 Difference]: Start difference. First operand 486 states and 1290 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) [2022-11-23 13:47:48,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:47:48,193 INFO L93 Difference]: Finished difference Result 969 states and 2577 transitions. [2022-11-23 13:47:48,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:47:48,195 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 [2022-11-23 13:47:48,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:47:48,204 INFO L225 Difference]: With dead ends: 969 [2022-11-23 13:47:48,205 INFO L226 Difference]: Without dead ends: 969 [2022-11-23 13:47:48,205 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 [2022-11-23 13:47:48,206 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 13:47:48,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 0 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 13:47:48,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2022-11-23 13:47:48,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 488. [2022-11-23 13:47:48,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 321 states have (on average 4.037383177570093) internal successors, (1296), 487 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:48,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1296 transitions. [2022-11-23 13:47:48,254 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1296 transitions. Word has length 2 [2022-11-23 13:47:48,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:47:48,254 INFO L495 AbstractCegarLoop]: Abstraction has 488 states and 1296 transitions. [2022-11-23 13:47:48,254 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) [2022-11-23 13:47:48,255 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1296 transitions. [2022-11-23 13:47:48,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 13:47:48,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:47:48,255 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 13:47:48,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 13:47:48,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:47:48,471 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:47:48,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:47:48,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1124236, now seen corresponding path program 1 times [2022-11-23 13:47:48,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:47:48,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2087839101] [2022-11-23 13:47:48,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:47:48,473 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:47:48,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:47:48,474 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:47:48,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 13:47:48,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:47:48,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 13:47:48,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:47:48,691 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 13:47:48,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 13:47:48,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:47:48,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:47:49,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:47:49,112 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:47:49,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2087839101] [2022-11-23 13:47:49,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2087839101] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:47:49,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1061715440] [2022-11-23 13:47:49,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:47:49,113 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:47:49,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:47:49,119 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:47:49,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-23 13:47:49,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:47:49,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 13:47:49,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:47:49,444 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 13:47:49,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 13:47:49,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:47:49,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:47:49,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:47:49,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1061715440] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:47:49,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379875333] [2022-11-23 13:47:49,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:47:49,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:47:49,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:47:49,606 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:47:49,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 13:47:49,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:47:49,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 13:47:49,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:47:49,808 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 13:47:49,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 13:47:49,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:47:49,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:47:50,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:47:50,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379875333] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:47:50,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 13:47:50,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-23 13:47:50,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454292504] [2022-11-23 13:47:50,069 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 13:47:50,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 13:47:50,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:47:50,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 13:47:50,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-23 13:47:50,071 INFO L87 Difference]: Start difference. First operand 488 states and 1296 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:53,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:47:53,454 INFO L93 Difference]: Finished difference Result 1937 states and 5157 transitions. [2022-11-23 13:47:53,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 13:47:53,457 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-23 13:47:53,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:47:53,473 INFO L225 Difference]: With dead ends: 1937 [2022-11-23 13:47:53,473 INFO L226 Difference]: Without dead ends: 1937 [2022-11-23 13:47:53,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-23 13:47:53,481 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 387 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-23 13:47:53,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 0 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-23 13:47:53,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2022-11-23 13:47:53,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 494. [2022-11-23 13:47:53,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 327 states have (on average 4.018348623853211) internal successors, (1314), 493 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:53,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1314 transitions. [2022-11-23 13:47:53,528 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1314 transitions. Word has length 3 [2022-11-23 13:47:53,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:47:53,533 INFO L495 AbstractCegarLoop]: Abstraction has 494 states and 1314 transitions. [2022-11-23 13:47:53,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:53,533 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1314 transitions. [2022-11-23 13:47:53,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 13:47:53,534 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:47:53,535 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 13:47:53,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-23 13:47:53,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2022-11-23 13:47:53,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 13:47:54,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:47:54,149 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:47:54,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:47:54,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1126869, now seen corresponding path program 1 times [2022-11-23 13:47:54,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:47:54,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1433465539] [2022-11-23 13:47:54,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:47:54,150 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:47:54,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:47:54,152 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:47:54,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 13:47:54,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:47:54,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 13:47:54,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:47:54,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:47:54,320 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 13:47:54,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2022-11-23 13:47:54,424 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 13:47:54,425 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 [2022-11-23 13:47:54,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:47:54,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:47:54,478 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:47:54,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1433465539] [2022-11-23 13:47:54,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1433465539] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:47:54,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:47:54,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 13:47:54,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404658946] [2022-11-23 13:47:54,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:47:54,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:47:54,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:47:54,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:47:54,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:47:54,481 INFO L87 Difference]: Start difference. First operand 494 states and 1314 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:54,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:47:54,872 INFO L93 Difference]: Finished difference Result 395 states and 1008 transitions. [2022-11-23 13:47:54,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:47:54,873 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-23 13:47:54,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:47:54,876 INFO L225 Difference]: With dead ends: 395 [2022-11-23 13:47:54,876 INFO L226 Difference]: Without dead ends: 395 [2022-11-23 13:47:54,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:47:54,877 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 41 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 13:47:54,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 0 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 13:47:54,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-11-23 13:47:54,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 395. [2022-11-23 13:47:54,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 274 states have (on average 3.678832116788321) internal successors, (1008), 394 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:54,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1008 transitions. [2022-11-23 13:47:54,894 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1008 transitions. Word has length 3 [2022-11-23 13:47:54,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:47:54,894 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 1008 transitions. [2022-11-23 13:47:54,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:54,895 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1008 transitions. [2022-11-23 13:47:54,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 13:47:54,895 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:47:54,895 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 13:47:54,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 13:47:55,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:47:55,109 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:47:55,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:47:55,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1126870, now seen corresponding path program 1 times [2022-11-23 13:47:55,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:47:55,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [334756218] [2022-11-23 13:47:55,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:47:55,110 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:47:55,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:47:55,111 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:47:55,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 13:47:55,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:47:55,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 13:47:55,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:47:55,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:47:55,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:47:55,290 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 13:47:55,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-23 13:47:55,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-23 13:47:55,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:47:55,371 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 [2022-11-23 13:47:55,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:47:55,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:47:55,422 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:47:55,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [334756218] [2022-11-23 13:47:55,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [334756218] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:47:55,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:47:55,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 13:47:55,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53790488] [2022-11-23 13:47:55,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:47:55,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 13:47:55,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:47:55,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 13:47:55,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:47:55,425 INFO L87 Difference]: Start difference. First operand 395 states and 1008 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:55,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:47:55,835 INFO L93 Difference]: Finished difference Result 296 states and 702 transitions. [2022-11-23 13:47:55,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:47:55,836 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-23 13:47:55,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:47:55,838 INFO L225 Difference]: With dead ends: 296 [2022-11-23 13:47:55,838 INFO L226 Difference]: Without dead ends: 296 [2022-11-23 13:47:55,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:47:55,839 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 78 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 13:47:55,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 0 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 13:47:55,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-11-23 13:47:55,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2022-11-23 13:47:55,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 221 states have (on average 3.176470588235294) internal successors, (702), 295 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:55,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 702 transitions. [2022-11-23 13:47:55,852 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 702 transitions. Word has length 3 [2022-11-23 13:47:55,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:47:55,853 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 702 transitions. [2022-11-23 13:47:55,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:55,853 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 702 transitions. [2022-11-23 13:47:55,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 13:47:55,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:47:55,854 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 13:47:55,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 13:47:56,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:47:56,068 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:47:56,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:47:56,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1082945126, now seen corresponding path program 1 times [2022-11-23 13:47:56,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:47:56,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1645603299] [2022-11-23 13:47:56,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:47:56,069 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:47:56,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:47:56,071 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:47:56,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 13:47:56,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:47:56,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 13:47:56,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:47:56,225 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-23 13:47:56,226 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 2 case distinctions, treesize of input 26 treesize of output 33 [2022-11-23 13:47:56,267 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 13:47:56,268 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 [2022-11-23 13:47:56,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:47:56,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:47:56,286 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:47:56,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1645603299] [2022-11-23 13:47:56,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1645603299] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:47:56,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:47:56,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 13:47:56,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296562514] [2022-11-23 13:47:56,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:47:56,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:47:56,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:47:56,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:47:56,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:47:56,289 INFO L87 Difference]: Start difference. First operand 296 states and 702 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:56,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:47:56,571 INFO L93 Difference]: Finished difference Result 275 states and 659 transitions. [2022-11-23 13:47:56,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:47:56,572 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-23 13:47:56,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:47:56,574 INFO L225 Difference]: With dead ends: 275 [2022-11-23 13:47:56,575 INFO L226 Difference]: Without dead ends: 275 [2022-11-23 13:47:56,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:47:56,576 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 35 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 13:47:56,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 0 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 13:47:56,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-11-23 13:47:56,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2022-11-23 13:47:56,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 214 states have (on average 3.0794392523364484) internal successors, (659), 274 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:56,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 659 transitions. [2022-11-23 13:47:56,588 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 659 transitions. Word has length 5 [2022-11-23 13:47:56,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:47:56,588 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 659 transitions. [2022-11-23 13:47:56,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:56,589 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 659 transitions. [2022-11-23 13:47:56,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 13:47:56,589 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:47:56,589 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 13:47:56,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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)] Ended with exit code 0 [2022-11-23 13:47:56,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:47:56,802 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:47:56,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:47:56,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1082945128, now seen corresponding path program 1 times [2022-11-23 13:47:56,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:47:56,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1032614510] [2022-11-23 13:47:56,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:47:56,803 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:47:56,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:47:56,805 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:47:56,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 13:47:56,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:47:56,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 13:47:56,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:47:56,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:47:56,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:47:56,989 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 13:47:56,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-23 13:47:56,999 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 [2022-11-23 13:47:57,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:47:57,051 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 [2022-11-23 13:47:57,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:47:57,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:47:57,130 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:47:57,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1032614510] [2022-11-23 13:47:57,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1032614510] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:47:57,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:47:57,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 13:47:57,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427477441] [2022-11-23 13:47:57,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:47:57,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 13:47:57,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:47:57,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 13:47:57,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:47:57,132 INFO L87 Difference]: Start difference. First operand 275 states and 659 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:57,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:47:57,542 INFO L93 Difference]: Finished difference Result 254 states and 616 transitions. [2022-11-23 13:47:57,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:47:57,543 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-23 13:47:57,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:47:57,546 INFO L225 Difference]: With dead ends: 254 [2022-11-23 13:47:57,546 INFO L226 Difference]: Without dead ends: 254 [2022-11-23 13:47:57,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:47:57,547 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 68 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 13:47:57,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 0 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 13:47:57,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-11-23 13:47:57,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2022-11-23 13:47:57,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 207 states have (on average 2.975845410628019) internal successors, (616), 253 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:57,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 616 transitions. [2022-11-23 13:47:57,558 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 616 transitions. Word has length 5 [2022-11-23 13:47:57,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:47:57,558 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 616 transitions. [2022-11-23 13:47:57,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:57,559 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 616 transitions. [2022-11-23 13:47:57,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 13:47:57,559 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:47:57,560 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-23 13:47:57,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-23 13:47:57,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:47:57,773 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:47:57,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:47:57,774 INFO L85 PathProgramCache]: Analyzing trace with hash -859814740, now seen corresponding path program 2 times [2022-11-23 13:47:57,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:47:57,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1303076484] [2022-11-23 13:47:57,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 13:47:57,774 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:47:57,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:47:57,775 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:47:57,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 13:47:57,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 13:47:57,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:47:57,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 13:47:57,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:47:58,011 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 13:47:58,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 13:47:58,246 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:47:58,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:47:59,293 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:47:59,294 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:47:59,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1303076484] [2022-11-23 13:47:59,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1303076484] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:47:59,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1193545114] [2022-11-23 13:47:59,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 13:47:59,294 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:47:59,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:47:59,296 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:47:59,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-23 13:47:59,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 13:47:59,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:47:59,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 13:47:59,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:47:59,601 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 13:47:59,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 13:47:59,723 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:47:59,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:47:59,970 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:47:59,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1193545114] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:47:59,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893471756] [2022-11-23 13:47:59,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 13:47:59,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:47:59,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:47:59,972 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:47:59,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 13:48:00,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 13:48:00,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:48:00,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 13:48:00,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:48:00,169 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 13:48:00,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 13:48:00,305 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:48:00,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:48:00,582 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:48:00,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893471756] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:48:00,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 13:48:00,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 10 [2022-11-23 13:48:00,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056727848] [2022-11-23 13:48:00,583 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 13:48:00,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 13:48:00,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:48:00,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 13:48:00,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-23 13:48:00,585 INFO L87 Difference]: Start difference. First operand 254 states and 616 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) [2022-11-23 13:48:04,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:48:06,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:48:08,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:48:10,567 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 [] [2022-11-23 13:48:15,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:15,620 INFO L93 Difference]: Finished difference Result 1951 states and 4787 transitions. [2022-11-23 13:48:15,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 13:48:15,622 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 [2022-11-23 13:48:15,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:15,635 INFO L225 Difference]: With dead ends: 1951 [2022-11-23 13:48:15,636 INFO L226 Difference]: Without dead ends: 1951 [2022-11-23 13:48:15,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-11-23 13:48:15,638 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 682 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 66 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:15,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [682 Valid, 0 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1003 Invalid, 2 Unknown, 0 Unchecked, 13.5s Time] [2022-11-23 13:48:15,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1951 states. [2022-11-23 13:48:15,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1951 to 264. [2022-11-23 13:48:15,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 217 states have (on average 2.9308755760368665) internal successors, (636), 263 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:48:15,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 636 transitions. [2022-11-23 13:48:15,669 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 636 transitions. Word has length 6 [2022-11-23 13:48:15,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:15,669 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 636 transitions. [2022-11-23 13:48:15,669 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) [2022-11-23 13:48:15,670 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 636 transitions. [2022-11-23 13:48:15,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 13:48:15,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:15,671 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 13:48:15,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-23 13:48:15,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 13:48:16,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 13:48:16,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:48:16,285 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:48:16,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:16,286 INFO L85 PathProgramCache]: Analyzing trace with hash -788443945, now seen corresponding path program 1 times [2022-11-23 13:48:16,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:48:16,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [301643455] [2022-11-23 13:48:16,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:16,287 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:48:16,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:48:16,288 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:48:16,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 13:48:16,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:16,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 13:48:16,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:48:16,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:48:16,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:48:16,474 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:48:16,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [301643455] [2022-11-23 13:48:16,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [301643455] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:16,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:48:16,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:48:16,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609418992] [2022-11-23 13:48:16,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:16,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 13:48:16,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:48:16,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 13:48:16,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:48:16,476 INFO L87 Difference]: Start difference. First operand 264 states and 636 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:48:17,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:17,227 INFO L93 Difference]: Finished difference Result 339 states and 787 transitions. [2022-11-23 13:48:17,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 13:48:17,231 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-23 13:48:17,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:17,234 INFO L225 Difference]: With dead ends: 339 [2022-11-23 13:48:17,234 INFO L226 Difference]: Without dead ends: 339 [2022-11-23 13:48:17,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:48:17,235 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 28 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:17,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 0 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 13:48:17,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-11-23 13:48:17,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 306. [2022-11-23 13:48:17,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 259 states have (on average 2.833976833976834) internal successors, (734), 305 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:48:17,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 734 transitions. [2022-11-23 13:48:17,247 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 734 transitions. Word has length 6 [2022-11-23 13:48:17,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:17,248 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 734 transitions. [2022-11-23 13:48:17,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:48:17,248 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 734 transitions. [2022-11-23 13:48:17,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 13:48:17,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:17,249 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:48:17,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 13:48:17,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:48:17,464 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:48:17,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:17,464 INFO L85 PathProgramCache]: Analyzing trace with hash -813074505, now seen corresponding path program 1 times [2022-11-23 13:48:17,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:48:17,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1166346378] [2022-11-23 13:48:17,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:17,465 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:48:17,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:48:17,467 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:48:17,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 13:48:17,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:17,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 13:48:17,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:48:17,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:48:17,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:48:17,683 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:48:17,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1166346378] [2022-11-23 13:48:17,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1166346378] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:17,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:48:17,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 13:48:17,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789120293] [2022-11-23 13:48:17,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:17,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 13:48:17,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:48:17,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 13:48:17,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:48:17,685 INFO L87 Difference]: Start difference. First operand 306 states and 734 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:48:18,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:18,542 INFO L93 Difference]: Finished difference Result 404 states and 945 transitions. [2022-11-23 13:48:18,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 13:48:18,543 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-23 13:48:18,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:18,545 INFO L225 Difference]: With dead ends: 404 [2022-11-23 13:48:18,545 INFO L226 Difference]: Without dead ends: 404 [2022-11-23 13:48:18,545 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 [2022-11-23 13:48:18,546 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 44 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:18,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 0 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 13:48:18,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-11-23 13:48:18,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 306. [2022-11-23 13:48:18,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 259 states have (on average 2.833976833976834) internal successors, (734), 305 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:48:18,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 734 transitions. [2022-11-23 13:48:18,558 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 734 transitions. Word has length 7 [2022-11-23 13:48:18,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:18,558 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 734 transitions. [2022-11-23 13:48:18,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:48:18,559 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 734 transitions. [2022-11-23 13:48:18,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 13:48:18,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:18,560 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:48:18,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 13:48:18,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:48:18,772 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:48:18,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:18,772 INFO L85 PathProgramCache]: Analyzing trace with hash 549323477, now seen corresponding path program 1 times [2022-11-23 13:48:18,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:48:18,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1028679687] [2022-11-23 13:48:18,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:18,773 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:48:18,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:48:18,774 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:48:18,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 13:48:18,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:18,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 13:48:18,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:48:19,059 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 13:48:19,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 13:48:19,202 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-23 13:48:19,202 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 22 [2022-11-23 13:48:19,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:48:19,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:48:20,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:48:20,923 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:48:20,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1028679687] [2022-11-23 13:48:20,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1028679687] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:48:20,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [346769324] [2022-11-23 13:48:20,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:20,923 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:48:20,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:48:20,927 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:48:20,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-11-23 13:48:21,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:21,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 13:48:21,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:48:21,315 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 13:48:21,315 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 13:48:21,401 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 13:48:21,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 13:48:21,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:48:21,650 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 [2022-11-23 13:48:21,664 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 13:48:21,664 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 [2022-11-23 13:48:21,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:48:21,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:48:30,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:48:30,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [346769324] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:48:30,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664885437] [2022-11-23 13:48:30,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:30,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:48:30,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:48:30,472 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:48:30,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-23 13:48:30,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:30,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 13:48:30,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:48:30,693 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 13:48:30,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 13:48:30,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:48:30,823 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 [2022-11-23 13:48:30,848 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 13:48:30,848 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 [2022-11-23 13:48:30,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:48:30,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:48:33,315 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:48:33,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 63 [2022-11-23 13:48:35,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:48:35,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664885437] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:48:35,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 13:48:35,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4, 4, 4, 4] total 18 [2022-11-23 13:48:35,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628741111] [2022-11-23 13:48:35,797 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 13:48:35,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-23 13:48:35,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:48:35,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-23 13:48:35,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=307, Unknown=4, NotChecked=0, Total=380 [2022-11-23 13:48:35,799 INFO L87 Difference]: Start difference. First operand 306 states and 734 transitions. Second operand has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:48:58,126 WARN L233 SmtUtils]: Spent 21.55s on a formula simplification. DAG size of input: 48 DAG size of output: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:49:23,983 WARN L233 SmtUtils]: Spent 19.13s on a formula simplification. DAG size of input: 60 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:49:45,248 WARN L233 SmtUtils]: Spent 20.83s on a formula simplification. DAG size of input: 56 DAG size of output: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:49:52,098 WARN L233 SmtUtils]: Spent 6.48s on a formula simplification. DAG size of input: 54 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:50:05,355 WARN L233 SmtUtils]: Spent 7.62s on a formula simplification. DAG size of input: 49 DAG size of output: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:50:29,464 WARN L233 SmtUtils]: Spent 18.12s on a formula simplification. DAG size of input: 62 DAG size of output: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:50:41,293 WARN L233 SmtUtils]: Spent 7.14s on a formula simplification. DAG size of input: 60 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:50:51,152 WARN L233 SmtUtils]: Spent 5.83s on a formula simplification. DAG size of input: 60 DAG size of output: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:51:05,979 WARN L233 SmtUtils]: Spent 9.52s on a formula simplification. DAG size of input: 66 DAG size of output: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:51:22,439 WARN L233 SmtUtils]: Spent 13.70s on a formula simplification. DAG size of input: 62 DAG size of output: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:51:34,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:51:34,075 INFO L93 Difference]: Finished difference Result 3331 states and 7999 transitions. [2022-11-23 13:51:34,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-23 13:51:34,076 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-23 13:51:34,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:51:34,093 INFO L225 Difference]: With dead ends: 3331 [2022-11-23 13:51:34,093 INFO L226 Difference]: Without dead ends: 3331 [2022-11-23 13:51:34,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 184.3s TimeCoverageRelationStatistics Valid=634, Invalid=2117, Unknown=5, NotChecked=0, Total=2756 [2022-11-23 13:51:34,096 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1350 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1265 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1350 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-11-23 13:51:34,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1350 Valid, 0 Invalid, 1355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1265 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2022-11-23 13:51:34,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3331 states. [2022-11-23 13:51:34,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3331 to 332. [2022-11-23 13:51:34,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 290 states have (on average 2.9551724137931035) internal successors, (857), 331 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:51:34,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 857 transitions. [2022-11-23 13:51:34,145 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 857 transitions. Word has length 8 [2022-11-23 13:51:34,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:51:34,146 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 857 transitions. [2022-11-23 13:51:34,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:51:34,146 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 857 transitions. [2022-11-23 13:51:34,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 13:51:34,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:51:34,149 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:51:34,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-11-23 13:51:34,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-23 13:51:34,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 13:51:34,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:51:34,753 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:51:34,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:51:34,754 INFO L85 PathProgramCache]: Analyzing trace with hash 549323527, now seen corresponding path program 1 times [2022-11-23 13:51:34,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:51:34,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1174079854] [2022-11-23 13:51:34,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:34,754 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:51:34,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:51:34,756 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:51:34,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 13:51:34,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:34,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 13:51:34,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:51:35,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:51:35,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:51:35,324 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 [2022-11-23 13:51:35,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:51:35,451 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:51:35,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1174079854] [2022-11-23 13:51:35,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1174079854] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:51:35,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1634503314] [2022-11-23 13:51:35,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:35,452 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:51:35,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:51:35,455 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:51:35,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-11-23 13:51:35,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:35,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 13:51:35,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:51:35,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-23 13:51:36,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:51:36,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:51:36,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:51:36,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1634503314] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:51:36,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425080933] [2022-11-23 13:51:36,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:36,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:51:36,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:51:36,415 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:51:36,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-23 13:51:36,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:36,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 13:51:36,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:51:36,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-23 13:51:37,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:51:37,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:51:37,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:51:37,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425080933] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 13:51:37,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2022-11-23 13:51:37,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5, 5, 5, 5] total 20 [2022-11-23 13:51:37,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925397104] [2022-11-23 13:51:37,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:51:37,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 13:51:37,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:51:37,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 13:51:37,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-11-23 13:51:37,268 INFO L87 Difference]: Start difference. First operand 332 states and 857 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 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) [2022-11-23 13:51:38,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:51:38,984 INFO L93 Difference]: Finished difference Result 493 states and 1230 transitions. [2022-11-23 13:51:38,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 13:51:38,986 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 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 [2022-11-23 13:51:38,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:51:38,990 INFO L225 Difference]: With dead ends: 493 [2022-11-23 13:51:38,990 INFO L226 Difference]: Without dead ends: 493 [2022-11-23 13:51:38,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-11-23 13:51:38,991 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 122 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-23 13:51:38,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 0 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-23 13:51:38,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-11-23 13:51:39,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 332. [2022-11-23 13:51:39,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 295 states have (on average 3.0677966101694913) internal successors, (905), 331 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:51:39,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 905 transitions. [2022-11-23 13:51:39,005 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 905 transitions. Word has length 8 [2022-11-23 13:51:39,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:51:39,006 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 905 transitions. [2022-11-23 13:51:39,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 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) [2022-11-23 13:51:39,006 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 905 transitions. [2022-11-23 13:51:39,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 13:51:39,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:51:39,007 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:51:39,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-11-23 13:51:39,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-23 13:51:39,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 13:51:39,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:51:39,611 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:51:39,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:51:39,612 INFO L85 PathProgramCache]: Analyzing trace with hash 549323529, now seen corresponding path program 1 times [2022-11-23 13:51:39,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:51:39,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1319783002] [2022-11-23 13:51:39,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:39,612 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:51:39,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:51:39,614 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:51:39,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 13:51:39,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:39,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 13:51:39,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:51:39,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 13:51:39,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 13:51:39,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:51:39,777 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:51:39,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1319783002] [2022-11-23 13:51:39,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1319783002] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:51:39,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:51:39,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:51:39,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372909] [2022-11-23 13:51:39,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:51:39,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 13:51:39,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:51:39,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 13:51:39,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:51:39,780 INFO L87 Difference]: Start difference. First operand 332 states and 905 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) 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) [2022-11-23 13:51:40,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:51:40,076 INFO L93 Difference]: Finished difference Result 268 states and 704 transitions. [2022-11-23 13:51:40,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 13:51:40,076 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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 [2022-11-23 13:51:40,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:51:40,079 INFO L225 Difference]: With dead ends: 268 [2022-11-23 13:51:40,079 INFO L226 Difference]: Without dead ends: 268 [2022-11-23 13:51:40,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:51:40,080 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 52 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 13:51:40,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 0 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 13:51:40,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-11-23 13:51:40,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2022-11-23 13:51:40,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 246 states have (on average 2.861788617886179) internal successors, (704), 267 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:51:40,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 704 transitions. [2022-11-23 13:51:40,090 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 704 transitions. Word has length 8 [2022-11-23 13:51:40,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:51:40,091 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 704 transitions. [2022-11-23 13:51:40,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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) [2022-11-23 13:51:40,091 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 704 transitions. [2022-11-23 13:51:40,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 13:51:40,092 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:51:40,092 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:51:40,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 13:51:40,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:51:40,307 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:51:40,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:51:40,307 INFO L85 PathProgramCache]: Analyzing trace with hash 549323476, now seen corresponding path program 1 times [2022-11-23 13:51:40,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:51:40,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1831004987] [2022-11-23 13:51:40,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:40,308 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:51:40,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:51:40,309 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:51:40,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 13:51:40,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:40,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 13:51:40,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:51:40,611 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 13:51:40,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 13:51:40,657 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 13:51:40,657 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 [2022-11-23 13:51:40,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 13:51:40,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:51:40,680 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:51:40,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1831004987] [2022-11-23 13:51:40,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1831004987] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:51:40,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:51:40,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 13:51:40,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797449697] [2022-11-23 13:51:40,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:51:40,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 13:51:40,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:51:40,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 13:51:40,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:51:40,683 INFO L87 Difference]: Start difference. First operand 268 states and 704 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) [2022-11-23 13:51:40,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:51:40,980 INFO L93 Difference]: Finished difference Result 212 states and 531 transitions. [2022-11-23 13:51:40,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 13:51:40,980 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 [2022-11-23 13:51:40,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:51:40,981 INFO L225 Difference]: With dead ends: 212 [2022-11-23 13:51:40,982 INFO L226 Difference]: Without dead ends: 212 [2022-11-23 13:51:40,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:51:40,982 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 47 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 13:51:40,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 0 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 13:51:40,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-11-23 13:51:40,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2022-11-23 13:51:40,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 201 states have (on average 2.6417910447761193) internal successors, (531), 211 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:51:40,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 531 transitions. [2022-11-23 13:51:40,988 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 531 transitions. Word has length 8 [2022-11-23 13:51:40,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:51:40,989 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 531 transitions. [2022-11-23 13:51:40,989 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) [2022-11-23 13:51:40,989 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 531 transitions. [2022-11-23 13:51:40,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 13:51:40,990 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:51:40,990 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:51:41,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 13:51:41,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:51:41,195 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:51:41,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:51:41,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1775280696, now seen corresponding path program 1 times [2022-11-23 13:51:41,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:51:41,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693137460] [2022-11-23 13:51:41,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:41,197 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:51:41,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:51:41,199 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:51:41,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 13:51:41,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:41,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 13:51:41,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:51:41,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 13:51:41,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:51:41,479 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:51:41,479 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:51:41,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693137460] [2022-11-23 13:51:41,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [693137460] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:51:41,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:51:41,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 13:51:41,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526548886] [2022-11-23 13:51:41,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:51:41,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 13:51:41,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:51:41,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 13:51:41,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:51:41,481 INFO L87 Difference]: Start difference. First operand 212 states and 531 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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) [2022-11-23 13:51:41,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:51:41,969 INFO L93 Difference]: Finished difference Result 298 states and 764 transitions. [2022-11-23 13:51:41,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 13:51:41,970 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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 [2022-11-23 13:51:41,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:51:41,972 INFO L225 Difference]: With dead ends: 298 [2022-11-23 13:51:41,972 INFO L226 Difference]: Without dead ends: 298 [2022-11-23 13:51:41,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-23 13:51:41,973 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 70 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 13:51:41,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 0 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 13:51:41,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-11-23 13:51:41,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 240. [2022-11-23 13:51:41,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 229 states have (on average 2.8995633187772927) internal successors, (664), 239 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:51:41,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 664 transitions. [2022-11-23 13:51:41,983 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 664 transitions. Word has length 8 [2022-11-23 13:51:41,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:51:41,983 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 664 transitions. [2022-11-23 13:51:41,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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) [2022-11-23 13:51:41,984 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 664 transitions. [2022-11-23 13:51:41,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 13:51:41,985 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:51:41,985 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:51:42,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-23 13:51:42,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:51:42,200 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:51:42,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:51:42,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1775280880, now seen corresponding path program 1 times [2022-11-23 13:51:42,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:51:42,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1821515795] [2022-11-23 13:51:42,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:42,201 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:51:42,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:51:42,202 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:51:42,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 13:51:42,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:42,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 13:51:42,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:51:42,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:51:42,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:51:42,427 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:51:42,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1821515795] [2022-11-23 13:51:42,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1821515795] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:51:42,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:51:42,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:51:42,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142425136] [2022-11-23 13:51:42,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:51:42,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 13:51:42,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:51:42,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 13:51:42,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:51:42,431 INFO L87 Difference]: Start difference. First operand 240 states and 664 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) [2022-11-23 13:51:42,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:51:42,987 INFO L93 Difference]: Finished difference Result 274 states and 720 transitions. [2022-11-23 13:51:42,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 13:51:42,988 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 [2022-11-23 13:51:42,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:51:42,989 INFO L225 Difference]: With dead ends: 274 [2022-11-23 13:51:42,990 INFO L226 Difference]: Without dead ends: 274 [2022-11-23 13:51:42,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:51:42,991 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 13:51:42,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 0 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 13:51:42,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-11-23 13:51:42,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 263. [2022-11-23 13:51:42,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 252 states have (on average 2.8134920634920637) internal successors, (709), 262 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:51:42,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 709 transitions. [2022-11-23 13:51:42,999 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 709 transitions. Word has length 8 [2022-11-23 13:51:43,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:51:43,000 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 709 transitions. [2022-11-23 13:51:43,000 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) [2022-11-23 13:51:43,000 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 709 transitions. [2022-11-23 13:51:43,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 13:51:43,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:51:43,001 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:51:43,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 13:51:43,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:51:43,216 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:51:43,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:51:43,217 INFO L85 PathProgramCache]: Analyzing trace with hash 324554736, now seen corresponding path program 1 times [2022-11-23 13:51:43,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:51:43,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [32737564] [2022-11-23 13:51:43,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:43,217 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:51:43,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:51:43,219 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:51:43,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 13:51:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:43,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 13:51:43,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:51:43,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:51:43,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:51:43,461 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:51:43,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [32737564] [2022-11-23 13:51:43,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [32737564] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:51:43,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:51:43,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 13:51:43,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170826114] [2022-11-23 13:51:43,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:51:43,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 13:51:43,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:51:43,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 13:51:43,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:51:43,463 INFO L87 Difference]: Start difference. First operand 263 states and 709 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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) [2022-11-23 13:51:44,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:51:44,017 INFO L93 Difference]: Finished difference Result 294 states and 739 transitions. [2022-11-23 13:51:44,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 13:51:44,018 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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 [2022-11-23 13:51:44,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:51:44,021 INFO L225 Difference]: With dead ends: 294 [2022-11-23 13:51:44,021 INFO L226 Difference]: Without dead ends: 294 [2022-11-23 13:51:44,022 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 [2022-11-23 13:51:44,022 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 13:51:44,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 0 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 13:51:44,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-11-23 13:51:44,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 238. [2022-11-23 13:51:44,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 227 states have (on average 2.8105726872246697) internal successors, (638), 237 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:51:44,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 638 transitions. [2022-11-23 13:51:44,032 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 638 transitions. Word has length 9 [2022-11-23 13:51:44,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:51:44,032 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 638 transitions. [2022-11-23 13:51:44,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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) [2022-11-23 13:51:44,033 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 638 transitions. [2022-11-23 13:51:44,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-23 13:51:44,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:51:44,034 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:51:44,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 13:51:44,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:51:44,247 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:51:44,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:51:44,247 INFO L85 PathProgramCache]: Analyzing trace with hash -376009842, now seen corresponding path program 1 times [2022-11-23 13:51:44,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:51:44,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1649132294] [2022-11-23 13:51:44,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:44,248 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:51:44,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:51:44,249 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:51:44,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 13:51:44,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:44,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 13:51:44,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:51:44,637 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 13:51:44,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 13:51:44,741 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 13:51:44,741 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 13:51:44,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:51:44,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 13:51:44,902 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 13:51:44,902 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 [2022-11-23 13:51:45,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:51:45,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:51:49,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:51:49,765 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:51:49,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1649132294] [2022-11-23 13:51:49,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1649132294] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:51:49,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1866710155] [2022-11-23 13:51:49,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:49,766 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:51:49,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:51:49,767 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:51:49,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-23 13:51:50,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:50,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 13:51:50,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:51:50,178 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 13:51:50,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 13:51:50,272 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 13:51:50,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 13:51:50,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:51:50,518 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 [2022-11-23 13:51:50,542 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 13:51:50,542 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 [2022-11-23 13:51:50,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:51:50,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:51:51,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:51:51,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1866710155] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:51:51,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49182803] [2022-11-23 13:51:51,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:51,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:51:51,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:51:51,015 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:51:51,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-23 13:51:51,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:51,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 13:51:51,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:51:51,286 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 13:51:51,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 13:51:51,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:51:51,397 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 [2022-11-23 13:51:51,425 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 13:51:51,425 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 [2022-11-23 13:51:51,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:51:51,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:51:51,896 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:51:51,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 63 [2022-11-23 13:51:54,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:51:54,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49182803] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:51:54,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 13:51:54,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 12 [2022-11-23 13:51:54,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799086193] [2022-11-23 13:51:54,222 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 13:51:54,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 13:51:54,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:51:54,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 13:51:54,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=137, Unknown=1, NotChecked=0, Total=182 [2022-11-23 13:51:54,223 INFO L87 Difference]: Start difference. First operand 238 states and 638 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 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) [2022-11-23 13:52:23,061 WARN L233 SmtUtils]: Spent 28.55s on a formula simplification. DAG size of input: 37 DAG size of output: 37 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:52:48,589 WARN L233 SmtUtils]: Spent 24.73s on a formula simplification. DAG size of input: 50 DAG size of output: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:53:14,271 WARN L233 SmtUtils]: Spent 25.34s on a formula simplification. DAG size of input: 43 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:53:30,122 WARN L233 SmtUtils]: Spent 14.77s on a formula simplification. DAG size of input: 36 DAG size of output: 33 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:53:43,048 WARN L233 SmtUtils]: Spent 12.62s on a formula simplification. DAG size of input: 49 DAG size of output: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:53:58,633 WARN L233 SmtUtils]: Spent 15.13s on a formula simplification. DAG size of input: 42 DAG size of output: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:54:24,029 WARN L233 SmtUtils]: Spent 24.66s on a formula simplification. DAG size of input: 52 DAG size of output: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:54:49,279 WARN L233 SmtUtils]: Spent 24.85s on a formula simplification. DAG size of input: 49 DAG size of output: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:55:15,019 WARN L233 SmtUtils]: Spent 24.87s on a formula simplification. DAG size of input: 56 DAG size of output: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:55:28,057 WARN L233 SmtUtils]: Spent 12.88s on a formula simplification. DAG size of input: 51 DAG size of output: 48 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:55:45,693 WARN L233 SmtUtils]: Spent 17.21s on a formula simplification. DAG size of input: 48 DAG size of output: 45 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:56:01,817 WARN L233 SmtUtils]: Spent 15.39s on a formula simplification. DAG size of input: 55 DAG size of output: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:56:28,893 WARN L233 SmtUtils]: Spent 26.79s on a formula simplification. DAG size of input: 46 DAG size of output: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:56:47,746 WARN L233 SmtUtils]: Spent 18.31s on a formula simplification. DAG size of input: 45 DAG size of output: 42 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:56:47,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:56:47,945 INFO L93 Difference]: Finished difference Result 1633 states and 4162 transitions. [2022-11-23 13:56:47,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-23 13:56:47,948 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-23 13:56:47,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:56:47,958 INFO L225 Difference]: With dead ends: 1633 [2022-11-23 13:56:47,958 INFO L226 Difference]: Without dead ends: 1633 [2022-11-23 13:56:47,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 296.8s TimeCoverageRelationStatistics Valid=399, Invalid=1160, Unknown=1, NotChecked=0, Total=1560 [2022-11-23 13:56:47,959 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 774 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:56:47,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [774 Valid, 0 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-23 13:56:47,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1633 states. [2022-11-23 13:56:47,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1633 to 284. [2022-11-23 13:56:47,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 273 states have (on average 2.791208791208791) internal successors, (762), 283 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:56:47,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 762 transitions. [2022-11-23 13:56:47,979 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 762 transitions. Word has length 10 [2022-11-23 13:56:47,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:56:47,979 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 762 transitions. [2022-11-23 13:56:47,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 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) [2022-11-23 13:56:47,979 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 762 transitions. [2022-11-23 13:56:47,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-23 13:56:47,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:56:47,980 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:56:47,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-11-23 13:56:48,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-23 13:56:48,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-23 13:56:48,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:56:48,584 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:56:48,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:56:48,585 INFO L85 PathProgramCache]: Analyzing trace with hash -381033663, now seen corresponding path program 1 times [2022-11-23 13:56:48,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:56:48,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1002230901] [2022-11-23 13:56:48,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:48,586 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:56:48,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:56:48,587 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:56:48,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 13:56:48,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:48,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 13:56:48,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:56:48,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:56:48,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:56:49,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:56:49,120 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:56:49,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1002230901] [2022-11-23 13:56:49,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1002230901] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:56:49,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1195338752] [2022-11-23 13:56:49,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:49,121 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:56:49,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:56:49,123 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:56:49,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-23 13:56:49,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:49,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 13:56:49,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:56:49,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:56:49,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:56:49,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:56:49,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1195338752] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:56:49,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267044368] [2022-11-23 13:56:49,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:49,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:56:49,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:56:49,928 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:56:49,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-23 13:56:50,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:50,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 13:56:50,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:56:50,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:56:50,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:56:50,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:56:50,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267044368] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:56:50,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 13:56:50,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 5, 5] total 23 [2022-11-23 13:56:50,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035148134] [2022-11-23 13:56:50,281 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 13:56:50,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-23 13:56:50,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:56:50,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-23 13:56:50,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-11-23 13:56:50,282 INFO L87 Difference]: Start difference. First operand 284 states and 762 transitions. Second operand has 24 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:56:57,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:56:57,103 INFO L93 Difference]: Finished difference Result 1003 states and 2405 transitions. [2022-11-23 13:56:57,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-23 13:56:57,104 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have 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 [2022-11-23 13:56:57,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:56:57,110 INFO L225 Difference]: With dead ends: 1003 [2022-11-23 13:56:57,110 INFO L226 Difference]: Without dead ends: 1003 [2022-11-23 13:56:57,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=550, Invalid=2312, Unknown=0, NotChecked=0, Total=2862 [2022-11-23 13:56:57,112 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 776 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1576 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-23 13:56:57,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [776 Valid, 0 Invalid, 1620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1576 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-11-23 13:56:57,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2022-11-23 13:56:57,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 418. [2022-11-23 13:56:57,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 407 states have (on average 2.8771498771498774) internal successors, (1171), 417 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:56:57,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1171 transitions. [2022-11-23 13:56:57,128 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1171 transitions. Word has length 10 [2022-11-23 13:56:57,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:56:57,129 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 1171 transitions. [2022-11-23 13:56:57,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:56:57,129 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1171 transitions. [2022-11-23 13:56:57,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 13:56:57,130 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:56:57,130 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:56:57,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 13:56:57,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-11-23 13:56:57,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-11-23 13:56:57,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 13:56:57,743 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:56:57,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:56:57,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1668015691, now seen corresponding path program 2 times [2022-11-23 13:56:57,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:56:57,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [184212218] [2022-11-23 13:56:57,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 13:56:57,744 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:56:57,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:56:57,745 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:56:57,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 13:56:57,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-23 13:56:57,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:56:57,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 13:56:57,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:56:57,965 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 13:56:57,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 13:56:58,052 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 13:56:58,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 13:56:58,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:58,175 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 [2022-11-23 13:56:58,187 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 13:56:58,187 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 [2022-11-23 13:56:58,284 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 13:56:58,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:56:58,285 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:56:58,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [184212218] [2022-11-23 13:56:58,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [184212218] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:56:58,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:56:58,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:56:58,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439161447] [2022-11-23 13:56:58,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:56:58,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 13:56:58,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:56:58,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 13:56:58,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:56:58,286 INFO L87 Difference]: Start difference. First operand 418 states and 1171 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) [2022-11-23 13:56:58,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:56:58,783 INFO L93 Difference]: Finished difference Result 518 states and 1402 transitions. [2022-11-23 13:56:58,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 13:56:58,784 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 11 [2022-11-23 13:56:58,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:56:58,787 INFO L225 Difference]: With dead ends: 518 [2022-11-23 13:56:58,787 INFO L226 Difference]: Without dead ends: 518 [2022-11-23 13:56:58,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:56:58,788 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 41 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 13:56:58,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 0 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 13:56:58,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-11-23 13:56:58,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 386. [2022-11-23 13:56:58,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 375 states have (on average 2.792) internal successors, (1047), 385 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:56:58,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1047 transitions. [2022-11-23 13:56:58,799 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1047 transitions. Word has length 11 [2022-11-23 13:56:58,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:56:58,800 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 1047 transitions. [2022-11-23 13:56:58,800 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) [2022-11-23 13:56:58,800 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1047 transitions. [2022-11-23 13:56:58,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 13:56:58,801 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:56:58,801 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:56:58,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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)] Ended with exit code 0 [2022-11-23 13:56:59,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:56:59,013 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:56:59,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:56:59,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1228606026, now seen corresponding path program 1 times [2022-11-23 13:56:59,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:56:59,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [27041450] [2022-11-23 13:56:59,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:59,014 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:56:59,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:56:59,015 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:56:59,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 13:56:59,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:59,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 13:56:59,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:56:59,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-23 13:56:59,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 13:56:59,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:57:00,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 13:57:00,115 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:57:00,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [27041450] [2022-11-23 13:57:00,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [27041450] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:57:00,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1316717802] [2022-11-23 13:57:00,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:00,116 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:57:00,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:57:00,117 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:57:00,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-23 13:57:00,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:57:00,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 13:57:00,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:57:00,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:57:00,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:57:01,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:57:01,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1316717802] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:57:01,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180373520] [2022-11-23 13:57:01,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:01,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:57:01,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:57:01,181 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:57:01,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-23 13:57:01,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:57:01,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 13:57:01,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:57:01,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:57:01,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:57:01,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:57:01,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180373520] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:57:01,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 13:57:01,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 19 [2022-11-23 13:57:01,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403326882] [2022-11-23 13:57:01,469 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 13:57:01,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-23 13:57:01,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:57:01,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-23 13:57:01,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-11-23 13:57:01,471 INFO L87 Difference]: Start difference. First operand 386 states and 1047 transitions. Second operand has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:07,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:57:07,009 INFO L93 Difference]: Finished difference Result 857 states and 2156 transitions. [2022-11-23 13:57:07,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-23 13:57:07,016 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have 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 [2022-11-23 13:57:07,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:57:07,021 INFO L225 Difference]: With dead ends: 857 [2022-11-23 13:57:07,021 INFO L226 Difference]: Without dead ends: 857 [2022-11-23 13:57:07,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=251, Invalid=871, Unknown=0, NotChecked=0, Total=1122 [2022-11-23 13:57:07,022 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 481 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-23 13:57:07,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [481 Valid, 0 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-23 13:57:07,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-11-23 13:57:07,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 519. [2022-11-23 13:57:07,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 508 states have (on average 3.1102362204724407) internal successors, (1580), 518 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:07,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 1580 transitions. [2022-11-23 13:57:07,044 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 1580 transitions. Word has length 11 [2022-11-23 13:57:07,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:57:07,047 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 1580 transitions. [2022-11-23 13:57:07,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:07,047 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 1580 transitions. [2022-11-23 13:57:07,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 13:57:07,049 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:57:07,049 INFO L195 NwaCegarLoop]: trace histogram [8, 1, 1, 1] [2022-11-23 13:57:07,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-11-23 13:57:07,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 13:57:07,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-23 13:57:07,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:57:07,653 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:57:07,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:57:07,653 INFO L85 PathProgramCache]: Analyzing trace with hash -46611925, now seen corresponding path program 1 times [2022-11-23 13:57:07,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:57:07,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [643233616] [2022-11-23 13:57:07,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:07,654 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 [2022-11-23 13:57:07,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:57:07,654 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:57:07,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 13:57:07,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:57:07,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 13:57:07,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:57:07,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 13:57:08,260 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:57:08,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:57:10,720 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:57:10,720 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:57:10,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [643233616] [2022-11-23 13:57:10,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [643233616] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:57:10,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1093279966] [2022-11-23 13:57:10,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:10,721 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:57:10,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:57:10,722 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:57:10,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-23 13:57:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:57:11,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 13:57:11,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:57:11,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-23 13:57:11,538 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:57:11,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:57:12,241 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:57:12,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1093279966] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:57:12,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180466797] [2022-11-23 13:57:12,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:12,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:57:12,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:57:12,243 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:57:12,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-23 13:57:12,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:57:12,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 13:57:12,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:57:12,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-23 13:57:12,559 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:57:12,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:57:12,948 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:57:12,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180466797] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:57:12,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 13:57:12,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 27 [2022-11-23 13:57:12,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781616973] [2022-11-23 13:57:12,949 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 13:57:12,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-23 13:57:12,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:57:12,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-23 13:57:12,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2022-11-23 13:57:12,951 INFO L87 Difference]: Start difference. First operand 519 states and 1580 transitions. Second operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:18,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:57:20,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:57:22,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:57:24,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:57:26,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:57:28,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:57:30,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:57:32,455 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 [] [2022-11-23 13:57:56,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:57:56,006 INFO L93 Difference]: Finished difference Result 6018 states and 18205 transitions. [2022-11-23 13:57:56,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-23 13:57:56,008 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-23 13:57:56,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:57:56,034 INFO L225 Difference]: With dead ends: 6018 [2022-11-23 13:57:56,034 INFO L226 Difference]: Without dead ends: 6018 [2022-11-23 13:57:56,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=690, Invalid=1202, Unknown=0, NotChecked=0, Total=1892 [2022-11-23 13:57:56,035 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2577 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2435 mSolverCounterSat, 190 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2577 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 2435 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.6s IncrementalHoareTripleChecker+Time [2022-11-23 13:57:56,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2577 Valid, 0 Invalid, 2632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 2435 Invalid, 7 Unknown, 0 Unchecked, 27.6s Time] [2022-11-23 13:57:56,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6018 states. [2022-11-23 13:57:56,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6018 to 560. [2022-11-23 13:57:56,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 549 states have (on average 3.0273224043715845) internal successors, (1662), 559 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:56,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 1662 transitions. [2022-11-23 13:57:56,097 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 1662 transitions. Word has length 11 [2022-11-23 13:57:56,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:57:56,098 INFO L495 AbstractCegarLoop]: Abstraction has 560 states and 1662 transitions. [2022-11-23 13:57:56,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:56,098 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 1662 transitions. [2022-11-23 13:57:56,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 13:57:56,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:57:56,099 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:57:56,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 13:57:56,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-11-23 13:57:56,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2022-11-23 13:57:56,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 13:57:56,712 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:57:56,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:57:56,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1232775858, now seen corresponding path program 1 times [2022-11-23 13:57:56,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:57:56,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [869792852] [2022-11-23 13:57:56,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:56,713 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:57:56,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:57:56,714 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:57:56,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 13:57:56,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:57:56,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 13:57:56,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:57:57,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:57:57,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:57:57,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:57:57,254 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:57:57,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [869792852] [2022-11-23 13:57:57,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [869792852] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:57:57,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [929618346] [2022-11-23 13:57:57,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:57,254 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:57:57,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:57:57,255 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:57:57,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-23 13:57:57,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:57:57,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 13:57:57,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:57:57,616 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:57:57,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:57:57,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:57:57,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [929618346] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:57:57,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065636563] [2022-11-23 13:57:57,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:57,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:57:57,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:57:57,657 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:57:57,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-23 13:57:57,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:57:57,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 13:57:57,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:57:57,919 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:57:57,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:57:57,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:57:57,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065636563] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:57:57,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 13:57:57,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 13 [2022-11-23 13:57:57,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411992253] [2022-11-23 13:57:57,991 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 13:57:57,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 13:57:57,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:57:57,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 13:57:57,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-11-23 13:57:57,992 INFO L87 Difference]: Start difference. First operand 560 states and 1662 transitions. Second operand has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:59,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:57:59,510 INFO L93 Difference]: Finished difference Result 732 states and 1923 transitions. [2022-11-23 13:57:59,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 13:57:59,511 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2022-11-23 13:57:59,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:57:59,514 INFO L225 Difference]: With dead ends: 732 [2022-11-23 13:57:59,514 INFO L226 Difference]: Without dead ends: 732 [2022-11-23 13:57:59,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2022-11-23 13:57:59,515 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 191 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-23 13:57:59,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 0 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-23 13:57:59,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2022-11-23 13:57:59,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 517. [2022-11-23 13:57:59,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 506 states have (on average 2.8873517786561265) internal successors, (1461), 516 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:59,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1461 transitions. [2022-11-23 13:57:59,529 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1461 transitions. Word has length 12 [2022-11-23 13:57:59,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:57:59,529 INFO L495 AbstractCegarLoop]: Abstraction has 517 states and 1461 transitions. [2022-11-23 13:57:59,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:59,530 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1461 transitions. [2022-11-23 13:57:59,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 13:57:59,530 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:57:59,531 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:57:59,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 13:57:59,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-23 13:57:59,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-11-23 13:58:00,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 13:58:00,152 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:58:00,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:58:00,153 INFO L85 PathProgramCache]: Analyzing trace with hash -619529085, now seen corresponding path program 2 times [2022-11-23 13:58:00,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:58:00,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1968306580] [2022-11-23 13:58:00,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 13:58:00,153 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:58:00,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:58:00,154 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:58:00,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-23 13:58:00,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 13:58:00,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:58:00,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 13:58:00,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:58:00,427 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-23 13:58:00,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-11-23 13:58:00,509 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 13:58:00,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 13:58:00,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:00,610 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 [2022-11-23 13:58:00,621 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 13:58:00,621 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 [2022-11-23 13:58:00,747 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:58:00,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:58:03,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:58:03,866 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:58:03,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1968306580] [2022-11-23 13:58:03,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1968306580] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:58:03,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [934939391] [2022-11-23 13:58:03,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 13:58:03,867 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:58:03,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:58:03,868 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:58:03,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-11-23 13:58:04,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 13:58:04,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:58:04,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 13:58:04,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:58:04,327 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 13:58:04,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 13:58:04,405 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 13:58:04,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 13:58:04,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:04,649 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 [2022-11-23 13:58:04,673 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 13:58:04,674 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 [2022-11-23 13:58:05,034 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:58:05,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:58:08,128 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:58:08,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [934939391] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:58:08,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600054776] [2022-11-23 13:58:08,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 13:58:08,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:58:08,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:58:08,130 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:58:08,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-23 13:58:08,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 13:58:08,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:58:08,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 13:58:08,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:58:08,417 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 13:58:08,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 13:58:08,502 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 13:58:08,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 13:58:08,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:08,693 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 [2022-11-23 13:58:08,705 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 13:58:08,706 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 [2022-11-23 13:58:08,998 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:58:08,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:58:11,255 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:58:11,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600054776] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:58:11,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 13:58:11,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 7] total 27 [2022-11-23 13:58:11,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602741941] [2022-11-23 13:58:11,255 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 13:58:11,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-23 13:58:11,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:58:11,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-23 13:58:11,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2022-11-23 13:58:11,257 INFO L87 Difference]: Start difference. First operand 517 states and 1461 transitions. Second operand has 29 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:58:29,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:58:29,042 INFO L93 Difference]: Finished difference Result 3524 states and 10159 transitions. [2022-11-23 13:58:29,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-23 13:58:29,043 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-23 13:58:29,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:58:29,057 INFO L225 Difference]: With dead ends: 3524 [2022-11-23 13:58:29,057 INFO L226 Difference]: Without dead ends: 3524 [2022-11-23 13:58:29,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1526 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=1130, Invalid=4570, Unknown=0, NotChecked=0, Total=5700 [2022-11-23 13:58:29,059 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1720 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1923 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1720 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-11-23 13:58:29,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1720 Valid, 0 Invalid, 1999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1923 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2022-11-23 13:58:29,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3524 states. [2022-11-23 13:58:29,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3524 to 709. [2022-11-23 13:58:29,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 698 states have (on average 3.2650429799426934) internal successors, (2279), 708 states have internal predecessors, (2279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:58:29,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 2279 transitions. [2022-11-23 13:58:29,119 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 2279 transitions. Word has length 12 [2022-11-23 13:58:29,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:58:29,119 INFO L495 AbstractCegarLoop]: Abstraction has 709 states and 2279 transitions. [2022-11-23 13:58:29,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 28 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:58:29,120 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 2279 transitions. [2022-11-23 13:58:29,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 13:58:29,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:58:29,121 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:58:29,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-23 13:58:29,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-23 13:58:29,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2022-11-23 13:58:29,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 13:58:29,731 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:58:29,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:58:29,731 INFO L85 PathProgramCache]: Analyzing trace with hash -619529035, now seen corresponding path program 1 times [2022-11-23 13:58:29,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:58:29,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1913886778] [2022-11-23 13:58:29,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:58:29,732 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:58:29,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:58:29,733 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:58:29,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-23 13:58:29,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:58:29,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 13:58:29,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:58:30,142 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:58:30,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:58:30,532 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 [2022-11-23 13:58:30,796 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:58:30,796 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:58:30,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1913886778] [2022-11-23 13:58:30,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1913886778] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:58:30,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1463019506] [2022-11-23 13:58:30,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:58:30,797 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:58:30,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:58:30,798 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:58:30,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-11-23 13:58:31,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:58:31,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-23 13:58:31,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:58:31,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 13:58:31,641 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:58:31,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:58:32,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 13:58:32,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1463019506] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:58:32,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866653073] [2022-11-23 13:58:32,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:58:32,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:58:32,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:58:32,403 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:58:32,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-23 13:58:32,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:58:32,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-23 13:58:32,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:58:32,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-23 13:58:33,052 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 13:58:33,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:58:34,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 13:58:34,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866653073] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:58:34,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 13:58:34,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 5, 5] total 30 [2022-11-23 13:58:34,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474251244] [2022-11-23 13:58:34,132 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 13:58:34,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-23 13:58:34,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:58:34,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-23 13:58:34,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2022-11-23 13:58:34,134 INFO L87 Difference]: Start difference. First operand 709 states and 2279 transitions. Second operand has 31 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 31 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:58:48,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:58:48,728 INFO L93 Difference]: Finished difference Result 5283 states and 16395 transitions. [2022-11-23 13:58:48,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-23 13:58:48,729 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 31 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 [2022-11-23 13:58:48,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:58:48,746 INFO L225 Difference]: With dead ends: 5283 [2022-11-23 13:58:48,746 INFO L226 Difference]: Without dead ends: 5283 [2022-11-23 13:58:48,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=1164, Invalid=4238, Unknown=0, NotChecked=0, Total=5402 [2022-11-23 13:58:48,748 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2755 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1477 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2755 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:58:48,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2755 Valid, 0 Invalid, 1540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1477 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-11-23 13:58:48,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5283 states. [2022-11-23 13:58:48,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5283 to 853. [2022-11-23 13:58:48,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 842 states have (on average 3.3954869358669835) internal successors, (2859), 852 states have internal predecessors, (2859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:58:48,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2859 transitions. [2022-11-23 13:58:48,842 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2859 transitions. Word has length 12 [2022-11-23 13:58:48,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:58:48,842 INFO L495 AbstractCegarLoop]: Abstraction has 853 states and 2859 transitions. [2022-11-23 13:58:48,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 31 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:58:48,843 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2859 transitions. [2022-11-23 13:58:48,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 13:58:48,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:58:48,845 INFO L195 NwaCegarLoop]: trace histogram [11, 1, 1] [2022-11-23 13:58:48,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-23 13:58:49,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-23 13:58:49,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2022-11-23 13:58:49,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 13:58:49,456 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:58:49,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:58:49,457 INFO L85 PathProgramCache]: Analyzing trace with hash 563075980, now seen corresponding path program 3 times [2022-11-23 13:58:49,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:58:49,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1317050958] [2022-11-23 13:58:49,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 13:58:49,457 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:58:49,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:58:49,458 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:58:49,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-23 13:58:49,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-23 13:58:49,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:58:49,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 13:58:49,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:58:49,818 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 13:58:49,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 13:58:50,402 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:58:50,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:58:54,317 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:58:54,317 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:58:54,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1317050958] [2022-11-23 13:58:54,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1317050958] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:58:54,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [53426718] [2022-11-23 13:58:54,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 13:58:54,317 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:58:54,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:58:54,318 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:58:54,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-11-23 13:58:55,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-23 13:58:55,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:58:55,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 13:58:55,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:58:55,713 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 13:58:55,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 13:58:55,988 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:58:55,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:59:01,471 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:59:01,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [53426718] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:59:01,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255500918] [2022-11-23 13:59:01,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 13:59:01,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:59:01,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:59:01,473 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:59:01,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-23 13:59:11,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-23 13:59:11,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:59:11,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 13:59:11,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:59:11,223 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 13:59:11,224 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 13:59:11,398 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:59:11,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:59:12,093 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:59:12,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255500918] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:59:12,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 13:59:12,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 35 [2022-11-23 13:59:12,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827178122] [2022-11-23 13:59:12,094 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 13:59:12,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-23 13:59:12,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:59:12,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-23 13:59:12,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2022-11-23 13:59:12,095 INFO L87 Difference]: Start difference. First operand 853 states and 2859 transitions. Second operand has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:59:29,460 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 [] [2022-11-23 13:59:31,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:33,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:35,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:37,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:39,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:41,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:43,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:45,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:47,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:49,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:51,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:53,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:55,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:57,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:59,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:00:01,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:00:03,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:00:05,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:00:24,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:00:24,440 INFO L93 Difference]: Finished difference Result 8344 states and 29891 transitions. [2022-11-23 14:00:24,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-23 14:00:24,443 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have 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 [2022-11-23 14:00:24,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:00:24,473 INFO L225 Difference]: With dead ends: 8344 [2022-11-23 14:00:24,473 INFO L226 Difference]: Without dead ends: 8344 [2022-11-23 14:00:24,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 29.3s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2022-11-23 14:00:24,475 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2877 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4317 mSolverCounterSat, 349 mSolverCounterUnsat, 19 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2877 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 4317 IncrementalHoareTripleChecker+Invalid, 19 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:00:24,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2877 Valid, 0 Invalid, 4685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 4317 Invalid, 19 Unknown, 0 Unchecked, 51.6s Time] [2022-11-23 14:00:24,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8344 states. [2022-11-23 14:00:24,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8344 to 866. [2022-11-23 14:00:24,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 855 states have (on average 3.374269005847953) internal successors, (2885), 865 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:00:24,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2885 transitions. [2022-11-23 14:00:24,601 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2885 transitions. Word has length 13 [2022-11-23 14:00:24,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:00:24,601 INFO L495 AbstractCegarLoop]: Abstraction has 866 states and 2885 transitions. [2022-11-23 14:00:24,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:00:24,601 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2885 transitions. [2022-11-23 14:00:24,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 14:00:24,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:00:24,604 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:00:24,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2022-11-23 14:00:24,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-23 14:00:25,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-11-23 14:00:25,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:00:25,210 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 14:00:25,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:00:25,211 INFO L85 PathProgramCache]: Analyzing trace with hash -935171474, now seen corresponding path program 2 times [2022-11-23 14:00:25,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:00:25,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1010614784] [2022-11-23 14:00:25,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:00:25,212 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:00:25,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:00:25,213 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:00:25,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-23 14:00:25,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-23 14:00:25,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:00:25,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 14:00:25,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:00:25,497 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 14:00:25,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 14:00:25,571 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 14:00:25,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 14:00:25,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:00:25,687 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 [2022-11-23 14:00:25,704 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:00:25,704 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 [2022-11-23 14:00:25,813 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:00:25,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:00:25,813 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:00:25,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1010614784] [2022-11-23 14:00:25,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1010614784] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:00:25,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:00:25,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:00:25,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152969727] [2022-11-23 14:00:25,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:00:25,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:00:25,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:00:25,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:00:25,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:00:25,815 INFO L87 Difference]: Start difference. First operand 866 states and 2885 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) [2022-11-23 14:00:26,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:00:26,291 INFO L93 Difference]: Finished difference Result 926 states and 2964 transitions. [2022-11-23 14:00:26,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:00:26,292 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 [2022-11-23 14:00:26,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:00:26,294 INFO L225 Difference]: With dead ends: 926 [2022-11-23 14:00:26,294 INFO L226 Difference]: Without dead ends: 926 [2022-11-23 14:00:26,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:00:26,295 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 37 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:00:26,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 0 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:00:26,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-11-23 14:00:26,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 697. [2022-11-23 14:00:26,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 686 states have (on average 3.41399416909621) internal successors, (2342), 696 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:00:26,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 2342 transitions. [2022-11-23 14:00:26,312 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 2342 transitions. Word has length 13 [2022-11-23 14:00:26,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:00:26,312 INFO L495 AbstractCegarLoop]: Abstraction has 697 states and 2342 transitions. [2022-11-23 14:00:26,313 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) [2022-11-23 14:00:26,313 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 2342 transitions. [2022-11-23 14:00:26,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 14:00:26,314 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:00:26,314 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:00:26,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Ended with exit code 0 [2022-11-23 14:00:26,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:00:26,527 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 14:00:26,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:00:26,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1869784944, now seen corresponding path program 2 times [2022-11-23 14:00:26,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:00:26,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2100565432] [2022-11-23 14:00:26,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:00:26,527 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:00:26,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:00:26,528 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:00:26,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-23 14:00:26,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:00:26,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:00:26,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 14:00:26,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:00:26,839 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-23 14:00:26,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-11-23 14:00:26,913 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 14:00:26,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 14:00:27,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:00:27,015 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 [2022-11-23 14:00:27,030 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:00:27,030 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 [2022-11-23 14:00:27,150 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:00:27,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:00:28,308 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:00:28,309 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:00:28,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2100565432] [2022-11-23 14:00:28,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2100565432] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:00:28,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1941239590] [2022-11-23 14:00:28,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:00:28,309 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:00:28,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:00:28,310 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:00:28,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2022-11-23 14:00:28,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:00:28,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:00:28,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 14:00:28,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:00:28,822 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 14:00:28,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 14:00:28,904 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 14:00:28,904 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 14:00:29,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:00:29,184 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 [2022-11-23 14:00:29,206 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:00:29,207 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 [2022-11-23 14:00:29,546 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:00:29,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:00:30,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:00:30,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1941239590] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:00:30,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290591331] [2022-11-23 14:00:30,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:00:30,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:00:30,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:00:30,666 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:00:30,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-11-23 14:00:30,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:00:30,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:00:30,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 14:00:30,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:00:31,045 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 14:00:31,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 14:00:31,130 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 14:00:31,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 14:00:31,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:00:31,366 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 [2022-11-23 14:00:31,388 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:00:31,389 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 [2022-11-23 14:00:31,666 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:00:31,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:00:34,030 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:00:34,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290591331] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:00:34,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:00:34,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 27 [2022-11-23 14:00:34,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176759752] [2022-11-23 14:00:34,031 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:00:34,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-23 14:00:34,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:00:34,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-23 14:00:34,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2022-11-23 14:00:34,032 INFO L87 Difference]: Start difference. First operand 697 states and 2342 transitions. Second operand has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:00:49,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:00:49,093 INFO L93 Difference]: Finished difference Result 2471 states and 7001 transitions. [2022-11-23 14:00:49,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-23 14:00:49,094 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2022-11-23 14:00:49,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:00:49,101 INFO L225 Difference]: With dead ends: 2471 [2022-11-23 14:00:49,102 INFO L226 Difference]: Without dead ends: 2471 [2022-11-23 14:00:49,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=998, Invalid=3972, Unknown=0, NotChecked=0, Total=4970 [2022-11-23 14:00:49,104 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1524 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1598 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1524 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:00:49,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1524 Valid, 0 Invalid, 1658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1598 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2022-11-23 14:00:49,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2022-11-23 14:00:49,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 791. [2022-11-23 14:00:49,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 780 states have (on average 3.3243589743589745) internal successors, (2593), 790 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:00:49,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 2593 transitions. [2022-11-23 14:00:49,152 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 2593 transitions. Word has length 13 [2022-11-23 14:00:49,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:00:49,152 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 2593 transitions. [2022-11-23 14:00:49,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:00:49,152 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 2593 transitions. [2022-11-23 14:00:49,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 14:00:49,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:00:49,154 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:00:49,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-11-23 14:00:49,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (54)] Forceful destruction successful, exit code 0 [2022-11-23 14:00:49,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-23 14:00:49,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:00:49,763 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 14:00:49,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:00:49,763 INFO L85 PathProgramCache]: Analyzing trace with hash -2128749360, now seen corresponding path program 3 times [2022-11-23 14:00:49,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:00:49,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [9351639] [2022-11-23 14:00:49,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:00:49,764 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:00:49,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:00:49,765 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:00:49,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-23 14:00:50,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 14:00:50,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:00:50,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 14:00:50,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:00:50,100 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 14:00:50,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 14:00:50,185 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 14:00:50,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 14:00:50,278 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:00:50,278 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 [2022-11-23 14:00:50,288 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 [2022-11-23 14:00:50,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 14:00:50,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:00:51,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 14:00:51,752 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:00:51,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [9351639] [2022-11-23 14:00:51,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [9351639] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:00:51,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [117443944] [2022-11-23 14:00:51,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:00:51,753 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:00:51,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:00:51,754 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:00:51,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2022-11-23 14:00:52,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 14:00:52,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:00:52,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 14:00:52,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:00:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:00:52,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:00:53,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:00:53,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [117443944] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:00:53,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942874062] [2022-11-23 14:00:53,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:00:53,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:00:53,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:00:53,304 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:00:53,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-11-23 14:00:53,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 14:00:53,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:00:53,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 14:00:53,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:00:53,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:00:53,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:00:53,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:00:53,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942874062] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:00:53,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:00:53,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 7, 7, 7, 7] total 27 [2022-11-23 14:00:53,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175236140] [2022-11-23 14:00:53,998 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:00:53,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-23 14:00:53,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:00:53,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-23 14:00:53,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2022-11-23 14:00:53,999 INFO L87 Difference]: Start difference. First operand 791 states and 2593 transitions. Second operand has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:01:05,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:01:05,646 INFO L93 Difference]: Finished difference Result 1345 states and 3676 transitions. [2022-11-23 14:01:05,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-23 14:01:05,649 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2022-11-23 14:01:05,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:01:05,652 INFO L225 Difference]: With dead ends: 1345 [2022-11-23 14:01:05,652 INFO L226 Difference]: Without dead ends: 1345 [2022-11-23 14:01:05,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=417, Invalid=1839, Unknown=0, NotChecked=0, Total=2256 [2022-11-23 14:01:05,653 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 717 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1842 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:01:05,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [717 Valid, 0 Invalid, 1878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1842 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2022-11-23 14:01:05,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2022-11-23 14:01:05,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 759. [2022-11-23 14:01:05,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 748 states have (on average 3.2566844919786098) internal successors, (2436), 758 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:01:05,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2436 transitions. [2022-11-23 14:01:05,673 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2436 transitions. Word has length 14 [2022-11-23 14:01:05,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:01:05,673 INFO L495 AbstractCegarLoop]: Abstraction has 759 states and 2436 transitions. [2022-11-23 14:01:05,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:01:05,673 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2436 transitions. [2022-11-23 14:01:05,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 14:01:05,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:01:05,675 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-23 14:01:05,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (57)] Ended with exit code 0 [2022-11-23 14:01:05,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-11-23 14:01:06,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-11-23 14:01:06,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:01:06,280 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 14:01:06,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:01:06,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1633085807, now seen corresponding path program 3 times [2022-11-23 14:01:06,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:01:06,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [876667221] [2022-11-23 14:01:06,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:01:06,281 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:01:06,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:01:06,282 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:01:06,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-23 14:01:06,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 14:01:06,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:01:06,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 14:01:06,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:01:06,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 14:01:07,004 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 [2022-11-23 14:01:07,044 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:01:07,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:01:08,107 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:01:08,107 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:01:08,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [876667221] [2022-11-23 14:01:08,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [876667221] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:01:08,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1165435722] [2022-11-23 14:01:08,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:01:08,108 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:01:08,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:01:08,109 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:01:08,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2022-11-23 14:01:08,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 14:01:08,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:01:08,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 14:01:08,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:01:08,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-23 14:01:08,939 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 [2022-11-23 14:01:08,946 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:01:08,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:01:09,540 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:01:09,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1165435722] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:01:09,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981490118] [2022-11-23 14:01:09,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:01:09,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:01:09,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:01:09,542 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:01:09,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a09857da-b54a-4d03-bc5d-46686fd093f0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-11-23 14:01:09,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 14:01:09,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:01:09,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 14:01:09,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:01:10,474 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:01:10,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:01:11,352 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:01:11,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981490118] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:01:11,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:01:11,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 7, 7] total 31 [2022-11-23 14:01:11,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783199738] [2022-11-23 14:01:11,353 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:01:11,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-23 14:01:11,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:01:11,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-23 14:01:11,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2022-11-23 14:01:11,354 INFO L87 Difference]: Start difference. First operand 759 states and 2436 transitions. Second operand has 32 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)