./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9 --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 c2150e0b957073117139b89f4d79d7a8523050efb20e53a1bf0b405c120dd6a7 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 18:57:11,850 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 18:57:11,852 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 18:57:11,873 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 18:57:11,873 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 18:57:11,874 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 18:57:11,876 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 18:57:11,878 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 18:57:11,879 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 18:57:11,880 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 18:57:11,882 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 18:57:11,883 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 18:57:11,883 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 18:57:11,884 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 18:57:11,886 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 18:57:11,887 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 18:57:11,888 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 18:57:11,889 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 18:57:11,891 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 18:57:11,893 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 18:57:11,895 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 18:57:11,896 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 18:57:11,898 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 18:57:11,899 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 18:57:11,902 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 18:57:11,903 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 18:57:11,903 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 18:57:11,904 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 18:57:11,905 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 18:57:11,906 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 18:57:11,906 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 18:57:11,907 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 18:57:11,908 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 18:57:11,909 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 18:57:11,910 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 18:57:11,911 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 18:57:11,912 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 18:57:11,912 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 18:57:11,912 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 18:57:11,914 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 18:57:11,914 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 18:57:11,916 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-20 18:57:11,942 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 18:57:11,944 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 18:57:11,945 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 18:57:11,945 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 18:57:11,946 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 18:57:11,947 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 18:57:11,947 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 18:57:11,947 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 18:57:11,948 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 18:57:11,948 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 18:57:11,949 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 18:57:11,949 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 18:57:11,950 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 18:57:11,950 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 18:57:11,950 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 18:57:11,950 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 18:57:11,951 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 18:57:11,951 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 18:57:11,952 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 18:57:11,952 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 18:57:11,953 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 18:57:11,953 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 18:57:11,953 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 18:57:11,953 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 18:57:11,954 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 18:57:11,954 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 18:57:11,955 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 18:57:11,955 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 18:57:11,955 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 18:57:11,956 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 18:57:11,956 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 18:57:11,956 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 18:57:11,956 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 18:57:11,957 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 18:57:11,957 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 18:57:11,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 18:57:11,957 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 18:57:11,958 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 18:57:11,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 18:57:11,958 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 18:57:11,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 18:57:11,958 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 18:57:11,959 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_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2150e0b957073117139b89f4d79d7a8523050efb20e53a1bf0b405c120dd6a7 [2022-11-20 18:57:12,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 18:57:12,250 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 18:57:12,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 18:57:12,254 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 18:57:12,255 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 18:57:12,256 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2022-11-20 18:57:15,307 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 18:57:15,560 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 18:57:15,561 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2022-11-20 18:57:15,572 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/data/71b16163b/35a1c7eeaca34666adaf9859fd488936/FLAGf44abf53b [2022-11-20 18:57:15,591 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/data/71b16163b/35a1c7eeaca34666adaf9859fd488936 [2022-11-20 18:57:15,597 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 18:57:15,600 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 18:57:15,606 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 18:57:15,606 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 18:57:15,611 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 18:57:15,612 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:57:15" (1/1) ... [2022-11-20 18:57:15,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67559463 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:15, skipping insertion in model container [2022-11-20 18:57:15,614 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:57:15" (1/1) ... [2022-11-20 18:57:15,622 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 18:57:15,653 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 18:57:15,827 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_0cfb1d65-f743-4f18-a823-f85999a068c4/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4174,4187] [2022-11-20 18:57:15,838 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 18:57:15,850 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-20 18:57:15,851 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@255798e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:15, skipping insertion in model container [2022-11-20 18:57:15,851 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 18:57:15,852 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-20 18:57:15,854 INFO L158 Benchmark]: Toolchain (without parser) took 252.95ms. Allocated memory is still 165.7MB. Free memory was 134.0MB in the beginning and 123.6MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 18:57:15,854 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 119.5MB. Free memory is still 63.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 18:57:15,855 INFO L158 Benchmark]: CACSL2BoogieTranslator took 245.56ms. Allocated memory is still 165.7MB. Free memory was 134.0MB in the beginning and 123.6MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 18:57:15,856 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 119.5MB. Free memory is still 63.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 245.56ms. Allocated memory is still 165.7MB. Free memory was 134.0MB in the beginning and 123.6MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 159]: 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_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9 --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 c2150e0b957073117139b89f4d79d7a8523050efb20e53a1bf0b405c120dd6a7 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 18:57:18,197 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 18:57:18,200 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 18:57:18,239 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 18:57:18,240 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 18:57:18,244 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 18:57:18,247 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 18:57:18,251 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 18:57:18,253 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 18:57:18,259 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 18:57:18,261 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 18:57:18,263 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 18:57:18,264 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 18:57:18,266 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 18:57:18,270 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 18:57:18,275 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 18:57:18,278 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 18:57:18,279 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 18:57:18,281 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 18:57:18,283 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 18:57:18,284 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 18:57:18,286 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 18:57:18,287 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 18:57:18,288 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 18:57:18,291 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 18:57:18,292 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 18:57:18,292 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 18:57:18,293 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 18:57:18,294 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 18:57:18,295 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 18:57:18,295 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 18:57:18,296 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 18:57:18,297 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 18:57:18,298 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 18:57:18,308 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 18:57:18,309 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 18:57:18,314 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 18:57:18,315 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 18:57:18,315 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 18:57:18,316 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 18:57:18,317 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 18:57:18,322 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-20 18:57:18,371 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 18:57:18,371 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 18:57:18,371 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 18:57:18,372 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 18:57:18,373 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 18:57:18,373 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 18:57:18,373 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 18:57:18,374 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 18:57:18,374 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 18:57:18,374 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 18:57:18,375 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 18:57:18,376 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 18:57:18,377 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 18:57:18,377 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 18:57:18,377 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 18:57:18,377 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 18:57:18,378 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 18:57:18,378 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 18:57:18,378 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 18:57:18,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 18:57:18,379 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 18:57:18,379 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 18:57:18,379 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 18:57:18,379 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 18:57:18,380 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 18:57:18,380 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 18:57:18,380 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 18:57:18,380 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 18:57:18,381 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 18:57:18,381 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 18:57:18,381 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 18:57:18,382 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 18:57:18,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 18:57:18,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 18:57:18,383 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 18:57:18,383 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-20 18:57:18,383 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 18:57:18,384 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 18:57:18,384 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 18:57:18,384 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_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2150e0b957073117139b89f4d79d7a8523050efb20e53a1bf0b405c120dd6a7 [2022-11-20 18:57:18,765 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 18:57:18,789 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 18:57:18,793 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 18:57:18,794 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 18:57:18,795 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 18:57:18,797 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2022-11-20 18:57:21,889 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 18:57:22,156 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 18:57:22,159 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2022-11-20 18:57:22,173 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/data/482944586/0e9848261ccd43efaf01e76d17bfc80a/FLAGd7619b6c0 [2022-11-20 18:57:22,206 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/data/482944586/0e9848261ccd43efaf01e76d17bfc80a [2022-11-20 18:57:22,213 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 18:57:22,215 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 18:57:22,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 18:57:22,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 18:57:22,224 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 18:57:22,225 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:57:22" (1/1) ... [2022-11-20 18:57:22,226 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b182899 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:22, skipping insertion in model container [2022-11-20 18:57:22,228 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:57:22" (1/1) ... [2022-11-20 18:57:22,237 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 18:57:22,280 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 18:57:22,556 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_0cfb1d65-f743-4f18-a823-f85999a068c4/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4174,4187] [2022-11-20 18:57:22,585 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 18:57:22,605 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-20 18:57:22,614 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 18:57:22,644 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_0cfb1d65-f743-4f18-a823-f85999a068c4/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4174,4187] [2022-11-20 18:57:22,650 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 18:57:22,662 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 18:57:22,703 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_0cfb1d65-f743-4f18-a823-f85999a068c4/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4174,4187] [2022-11-20 18:57:22,713 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 18:57:22,754 INFO L208 MainTranslator]: Completed translation [2022-11-20 18:57:22,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:22 WrapperNode [2022-11-20 18:57:22,768 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 18:57:22,790 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 18:57:22,791 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 18:57:22,791 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 18:57:22,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:22" (1/1) ... [2022-11-20 18:57:22,810 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:22" (1/1) ... [2022-11-20 18:57:22,862 INFO L138 Inliner]: procedures = 28, calls = 75, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 302 [2022-11-20 18:57:22,862 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 18:57:22,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 18:57:22,864 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 18:57:22,864 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 18:57:22,873 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:22" (1/1) ... [2022-11-20 18:57:22,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:22" (1/1) ... [2022-11-20 18:57:22,882 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:22" (1/1) ... [2022-11-20 18:57:22,886 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:22" (1/1) ... [2022-11-20 18:57:22,899 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:22" (1/1) ... [2022-11-20 18:57:22,904 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:22" (1/1) ... [2022-11-20 18:57:22,906 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:22" (1/1) ... [2022-11-20 18:57:22,908 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:22" (1/1) ... [2022-11-20 18:57:22,912 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 18:57:22,913 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 18:57:22,913 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 18:57:22,913 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 18:57:22,914 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:22" (1/1) ... [2022-11-20 18:57:22,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 18:57:22,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:57:22,964 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 18:57:22,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 18:57:23,013 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 18:57:23,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-20 18:57:23,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 18:57:23,014 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-20 18:57:23,014 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 18:57:23,014 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 18:57:23,014 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 18:57:23,014 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 18:57:23,015 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-20 18:57:23,015 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-20 18:57:23,015 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-20 18:57:23,015 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-20 18:57:23,016 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 18:57:23,016 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 18:57:23,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 18:57:23,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 18:57:23,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 18:57:23,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 18:57:23,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-20 18:57:23,018 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 18:57:23,158 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 18:57:23,161 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 18:57:24,113 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 18:57:24,439 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 18:57:24,440 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-20 18:57:24,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:57:24 BoogieIcfgContainer [2022-11-20 18:57:24,443 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 18:57:24,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 18:57:24,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 18:57:24,450 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 18:57:24,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:57:22" (1/3) ... [2022-11-20 18:57:24,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3409fcef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:57:24, skipping insertion in model container [2022-11-20 18:57:24,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:22" (2/3) ... [2022-11-20 18:57:24,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3409fcef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:57:24, skipping insertion in model container [2022-11-20 18:57:24,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:57:24" (3/3) ... [2022-11-20 18:57:24,456 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt2.wvr.c [2022-11-20 18:57:24,476 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 18:57:24,477 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2022-11-20 18:57:24,477 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 18:57:24,611 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-20 18:57:24,653 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 18:57:24,668 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 260 places, 266 transitions, 564 flow [2022-11-20 18:57:24,671 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 260 places, 266 transitions, 564 flow [2022-11-20 18:57:24,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 260 places, 266 transitions, 564 flow [2022-11-20 18:57:24,794 INFO L130 PetriNetUnfolder]: 19/262 cut-off events. [2022-11-20 18:57:24,795 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-20 18:57:24,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 262 events. 19/262 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 211 event pairs, 0 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 210. Up to 2 conditions per place. [2022-11-20 18:57:24,806 INFO L119 LiptonReduction]: Number of co-enabled transitions 3160 [2022-11-20 18:58:01,896 WARN L233 SmtUtils]: Spent 8.09s on a formula simplification. DAG size of input: 163 DAG size of output: 162 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 18:58:13,704 WARN L233 SmtUtils]: Spent 10.07s on a formula simplification. DAG size of input: 166 DAG size of output: 165 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 18:58:15,401 INFO L134 LiptonReduction]: Checked pairs total: 6187 [2022-11-20 18:58:15,402 INFO L136 LiptonReduction]: Total number of compositions: 275 [2022-11-20 18:58:15,409 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 76 places, 69 transitions, 170 flow [2022-11-20 18:58:15,759 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 5221 states, 4815 states have (on average 4.821391484942887) internal successors, (23215), 5220 states have internal predecessors, (23215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:15,777 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 18:58:15,782 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;@11c2b94d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 18:58:15,782 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2022-11-20 18:58:15,797 INFO L276 IsEmpty]: Start isEmpty. Operand has 5221 states, 4815 states have (on average 4.821391484942887) internal successors, (23215), 5220 states have internal predecessors, (23215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:15,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 18:58:15,804 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:58:15,804 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 18:58:15,805 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 18:58:15,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:58:15,814 INFO L85 PathProgramCache]: Analyzing trace with hash 40034, now seen corresponding path program 1 times [2022-11-20 18:58:15,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 18:58:15,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [496568560] [2022-11-20 18:58:15,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:58:15,828 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:58:15,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 18:58:15,835 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 18:58:15,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-20 18:58:15,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:58:15,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 18:58:15,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:58:16,208 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-20 18:58:16,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-20 18:58:16,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:58:16,331 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 18:58:16,331 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 18:58:16,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [496568560] [2022-11-20 18:58:16,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [496568560] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 18:58:16,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 18:58:16,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 18:58:16,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126166507] [2022-11-20 18:58:16,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 18:58:16,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 18:58:16,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 18:58:16,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 18:58:16,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 18:58:16,396 INFO L87 Difference]: Start difference. First operand has 5221 states, 4815 states have (on average 4.821391484942887) internal successors, (23215), 5220 states have internal predecessors, (23215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:16,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:58:16,924 INFO L93 Difference]: Finished difference Result 5218 states and 23212 transitions. [2022-11-20 18:58:16,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 18:58:16,927 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-20 18:58:16,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:58:17,071 INFO L225 Difference]: With dead ends: 5218 [2022-11-20 18:58:17,071 INFO L226 Difference]: Without dead ends: 5218 [2022-11-20 18:58:17,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 18:58:17,082 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 59 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 18:58:17,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 6 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 18:58:17,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5218 states. [2022-11-20 18:58:17,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5218 to 5218. [2022-11-20 18:58:17,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5218 states, 4815 states have (on average 4.820768431983385) internal successors, (23212), 5217 states have internal predecessors, (23212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:17,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5218 states to 5218 states and 23212 transitions. [2022-11-20 18:58:17,807 INFO L78 Accepts]: Start accepts. Automaton has 5218 states and 23212 transitions. Word has length 2 [2022-11-20 18:58:17,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:58:17,808 INFO L495 AbstractCegarLoop]: Abstraction has 5218 states and 23212 transitions. [2022-11-20 18:58:17,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:17,810 INFO L276 IsEmpty]: Start isEmpty. Operand 5218 states and 23212 transitions. [2022-11-20 18:58:17,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 18:58:17,811 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:58:17,814 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 18:58:17,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-20 18:58:18,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:58:18,032 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 18:58:18,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:58:18,033 INFO L85 PathProgramCache]: Analyzing trace with hash 40035, now seen corresponding path program 1 times [2022-11-20 18:58:18,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 18:58:18,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [945086858] [2022-11-20 18:58:18,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:58:18,034 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:58:18,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 18:58:18,036 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 18:58:18,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-20 18:58:18,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:58:18,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 18:58:18,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:58:18,432 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 18:58:18,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 18:58:18,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:58:18,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 18:58:18,496 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 18:58:18,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [945086858] [2022-11-20 18:58:18,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [945086858] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 18:58:18,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 18:58:18,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 18:58:18,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504460380] [2022-11-20 18:58:18,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 18:58:18,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 18:58:18,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 18:58:18,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 18:58:18,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 18:58:18,500 INFO L87 Difference]: Start difference. First operand 5218 states and 23212 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:19,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:58:19,273 INFO L93 Difference]: Finished difference Result 10433 states and 46421 transitions. [2022-11-20 18:58:19,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 18:58:19,274 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-20 18:58:19,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:58:19,368 INFO L225 Difference]: With dead ends: 10433 [2022-11-20 18:58:19,369 INFO L226 Difference]: Without dead ends: 10433 [2022-11-20 18:58:19,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 18:58:19,370 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 55 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 18:58:19,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 12 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 18:58:19,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10433 states. [2022-11-20 18:58:19,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10433 to 5220. [2022-11-20 18:58:19,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5220 states, 4817 states have (on average 4.820012455885406) internal successors, (23218), 5219 states have internal predecessors, (23218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:19,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5220 states to 5220 states and 23218 transitions. [2022-11-20 18:58:19,773 INFO L78 Accepts]: Start accepts. Automaton has 5220 states and 23218 transitions. Word has length 2 [2022-11-20 18:58:19,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:58:19,774 INFO L495 AbstractCegarLoop]: Abstraction has 5220 states and 23218 transitions. [2022-11-20 18:58:19,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:19,775 INFO L276 IsEmpty]: Start isEmpty. Operand 5220 states and 23218 transitions. [2022-11-20 18:58:19,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 18:58:19,775 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:58:19,776 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 18:58:19,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-20 18:58:19,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:58:19,988 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 18:58:19,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:58:19,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1247856, now seen corresponding path program 1 times [2022-11-20 18:58:19,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 18:58:19,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [788159933] [2022-11-20 18:58:19,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:58:19,990 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:58:19,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 18:58:19,991 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 18:58:20,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-20 18:58:20,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:58:20,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 18:58:20,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:58:20,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:58:20,428 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2022-11-20 18:58:20,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 81 [2022-11-20 18:58:21,041 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-20 18:58:21,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 32 [2022-11-20 18:58:21,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:58:21,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 18:58:21,121 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 18:58:21,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [788159933] [2022-11-20 18:58:21,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [788159933] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 18:58:21,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 18:58:21,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 18:58:21,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710938918] [2022-11-20 18:58:21,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 18:58:21,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 18:58:21,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 18:58:21,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 18:58:21,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 18:58:21,124 INFO L87 Difference]: Start difference. First operand 5220 states and 23218 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:21,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:58:21,412 INFO L93 Difference]: Finished difference Result 5221 states and 23221 transitions. [2022-11-20 18:58:21,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 18:58:21,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-20 18:58:21,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:58:21,456 INFO L225 Difference]: With dead ends: 5221 [2022-11-20 18:58:21,456 INFO L226 Difference]: Without dead ends: 5221 [2022-11-20 18:58:21,456 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 [2022-11-20 18:58:21,458 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 18:58:21,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 54 Unchecked, 0.2s Time] [2022-11-20 18:58:21,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5221 states. [2022-11-20 18:58:21,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5221 to 5221. [2022-11-20 18:58:21,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5221 states, 4818 states have (on average 4.819634703196347) internal successors, (23221), 5220 states have internal predecessors, (23221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:21,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5221 states to 5221 states and 23221 transitions. [2022-11-20 18:58:21,914 INFO L78 Accepts]: Start accepts. Automaton has 5221 states and 23221 transitions. Word has length 3 [2022-11-20 18:58:21,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:58:21,914 INFO L495 AbstractCegarLoop]: Abstraction has 5221 states and 23221 transitions. [2022-11-20 18:58:21,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:21,915 INFO L276 IsEmpty]: Start isEmpty. Operand 5221 states and 23221 transitions. [2022-11-20 18:58:21,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 18:58:21,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:58:21,915 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 18:58:21,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-20 18:58:22,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:58:22,123 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 18:58:22,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:58:22,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1247857, now seen corresponding path program 1 times [2022-11-20 18:58:22,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 18:58:22,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [925683191] [2022-11-20 18:58:22,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:58:22,124 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:58:22,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 18:58:22,126 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 18:58:22,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-20 18:58:22,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:58:22,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 18:58:22,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:58:22,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:58:22,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:58:22,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:58:22,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:58:22,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:58:22,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:58:22,506 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2022-11-20 18:58:22,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 41 [2022-11-20 18:58:22,582 INFO L321 Elim1Store]: treesize reduction 26, result has 16.1 percent of original size [2022-11-20 18:58:22,583 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 149 treesize of output 146 [2022-11-20 18:58:22,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:58:22,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 18:58:22,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:58:22,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 18:58:22,723 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 18:58:22,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [925683191] [2022-11-20 18:58:22,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [925683191] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 18:58:22,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 18:58:22,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 18:58:22,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087261045] [2022-11-20 18:58:22,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 18:58:22,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 18:58:22,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 18:58:22,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 18:58:22,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 18:58:22,725 INFO L87 Difference]: Start difference. First operand 5221 states and 23221 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:23,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:58:23,039 INFO L93 Difference]: Finished difference Result 4320 states and 18718 transitions. [2022-11-20 18:58:23,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 18:58:23,040 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-20 18:58:23,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:58:23,067 INFO L225 Difference]: With dead ends: 4320 [2022-11-20 18:58:23,067 INFO L226 Difference]: Without dead ends: 4320 [2022-11-20 18:58:23,068 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 [2022-11-20 18:58:23,069 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 57 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 18:58:23,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 6 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 1 Unchecked, 0.3s Time] [2022-11-20 18:58:23,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4320 states. [2022-11-20 18:58:23,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4320 to 4320. [2022-11-20 18:58:23,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4320 states, 3999 states have (on average 4.680670167541885) internal successors, (18718), 4319 states have internal predecessors, (18718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:23,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4320 states to 4320 states and 18718 transitions. [2022-11-20 18:58:23,226 INFO L78 Accepts]: Start accepts. Automaton has 4320 states and 18718 transitions. Word has length 3 [2022-11-20 18:58:23,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:58:23,226 INFO L495 AbstractCegarLoop]: Abstraction has 4320 states and 18718 transitions. [2022-11-20 18:58:23,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:23,226 INFO L276 IsEmpty]: Start isEmpty. Operand 4320 states and 18718 transitions. [2022-11-20 18:58:23,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 18:58:23,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:58:23,227 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 18:58:23,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-20 18:58:23,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:58:23,439 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 18:58:23,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:58:23,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1245873, now seen corresponding path program 1 times [2022-11-20 18:58:23,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 18:58:23,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [533972978] [2022-11-20 18:58:23,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:58:23,440 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:58:23,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 18:58:23,441 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 18:58:23,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-20 18:58:23,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:58:23,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 18:58:23,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:58:23,788 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 18:58:23,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 18:58:23,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:58:23,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:58:24,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:58:24,124 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 18:58:24,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [533972978] [2022-11-20 18:58:24,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [533972978] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 18:58:24,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1852730700] [2022-11-20 18:58:24,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:58:24,125 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 18:58:24,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 18:58:24,130 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 18:58:24,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-20 18:58:24,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:58:24,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 18:58:24,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:58:24,594 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 18:58:24,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 18:58:24,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:58:24,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:58:24,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:58:24,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1852730700] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 18:58:24,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700505366] [2022-11-20 18:58:24,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:58:24,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:58:24,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:58:24,739 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 18:58:24,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 18:58:24,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:58:24,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 18:58:24,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:58:25,055 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 18:58:25,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 18:58:25,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:58:25,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:58:25,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:58:25,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700505366] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 18:58:25,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 18:58:25,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-20 18:58:25,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404094207] [2022-11-20 18:58:25,299 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 18:58:25,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 18:58:25,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 18:58:25,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 18:58:25,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-20 18:58:25,301 INFO L87 Difference]: Start difference. First operand 4320 states and 18718 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:28,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:58:28,188 INFO L93 Difference]: Finished difference Result 17262 states and 74842 transitions. [2022-11-20 18:58:28,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 18:58:28,189 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 [2022-11-20 18:58:28,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:58:28,298 INFO L225 Difference]: With dead ends: 17262 [2022-11-20 18:58:28,298 INFO L226 Difference]: Without dead ends: 17262 [2022-11-20 18:58:28,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-20 18:58:28,299 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 475 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-20 18:58:28,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 30 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-20 18:58:28,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17262 states. [2022-11-20 18:58:28,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17262 to 4326. [2022-11-20 18:58:28,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4326 states, 4005 states have (on average 4.677403245942572) internal successors, (18733), 4325 states have internal predecessors, (18733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:28,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4326 states to 4326 states and 18733 transitions. [2022-11-20 18:58:28,834 INFO L78 Accepts]: Start accepts. Automaton has 4326 states and 18733 transitions. Word has length 3 [2022-11-20 18:58:28,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:58:28,835 INFO L495 AbstractCegarLoop]: Abstraction has 4326 states and 18733 transitions. [2022-11-20 18:58:28,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:28,835 INFO L276 IsEmpty]: Start isEmpty. Operand 4326 states and 18733 transitions. [2022-11-20 18:58:28,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 18:58:28,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:58:28,836 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 18:58:28,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-11-20 18:58:29,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 18:58:29,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-20 18:58:29,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 18:58:29,448 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 18:58:29,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:58:29,449 INFO L85 PathProgramCache]: Analyzing trace with hash 38683239, now seen corresponding path program 1 times [2022-11-20 18:58:29,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 18:58:29,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [297555466] [2022-11-20 18:58:29,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:58:29,449 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:58:29,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 18:58:29,451 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 18:58:29,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-20 18:58:29,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:58:29,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 18:58:29,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:58:29,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:58:29,804 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2022-11-20 18:58:29,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 81 [2022-11-20 18:58:31,043 INFO L321 Elim1Store]: treesize reduction 48, result has 31.4 percent of original size [2022-11-20 18:58:31,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 44 [2022-11-20 18:58:31,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 18:58:31,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 18:58:31,376 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 18:58:31,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [297555466] [2022-11-20 18:58:31,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [297555466] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 18:58:31,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 18:58:31,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 18:58:31,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663656001] [2022-11-20 18:58:31,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 18:58:31,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 18:58:31,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 18:58:31,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 18:58:31,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 18:58:31,378 INFO L87 Difference]: Start difference. First operand 4326 states and 18733 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:31,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:58:31,625 INFO L93 Difference]: Finished difference Result 4330 states and 18742 transitions. [2022-11-20 18:58:31,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 18:58:31,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-20 18:58:31,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:58:31,654 INFO L225 Difference]: With dead ends: 4330 [2022-11-20 18:58:31,654 INFO L226 Difference]: Without dead ends: 4330 [2022-11-20 18:58:31,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 18:58:31,655 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 18:58:31,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 52 Unchecked, 0.2s Time] [2022-11-20 18:58:31,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4330 states. [2022-11-20 18:58:31,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4330 to 4330. [2022-11-20 18:58:31,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4330 states, 4009 states have (on average 4.674981292092792) internal successors, (18742), 4329 states have internal predecessors, (18742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:31,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4330 states to 4330 states and 18742 transitions. [2022-11-20 18:58:31,932 INFO L78 Accepts]: Start accepts. Automaton has 4330 states and 18742 transitions. Word has length 4 [2022-11-20 18:58:31,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:58:31,933 INFO L495 AbstractCegarLoop]: Abstraction has 4330 states and 18742 transitions. [2022-11-20 18:58:31,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:31,933 INFO L276 IsEmpty]: Start isEmpty. Operand 4330 states and 18742 transitions. [2022-11-20 18:58:31,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 18:58:31,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:58:31,934 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 18:58:31,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-20 18:58:32,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:58:32,148 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 18:58:32,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:58:32,149 INFO L85 PathProgramCache]: Analyzing trace with hash 38628834, now seen corresponding path program 1 times [2022-11-20 18:58:32,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 18:58:32,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2022496041] [2022-11-20 18:58:32,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:58:32,149 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:58:32,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 18:58:32,150 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 18:58:32,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-20 18:58:32,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:58:32,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 18:58:32,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:58:32,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:58:32,462 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2022-11-20 18:58:32,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 81 [2022-11-20 18:58:32,925 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-20 18:58:32,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 32 [2022-11-20 18:58:32,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 18:58:32,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 18:58:32,987 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 18:58:32,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2022496041] [2022-11-20 18:58:32,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2022496041] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 18:58:32,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 18:58:32,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 18:58:32,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435452957] [2022-11-20 18:58:32,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 18:58:32,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 18:58:32,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 18:58:32,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 18:58:32,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 18:58:32,989 INFO L87 Difference]: Start difference. First operand 4330 states and 18742 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:33,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:58:33,208 INFO L93 Difference]: Finished difference Result 4330 states and 18741 transitions. [2022-11-20 18:58:33,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 18:58:33,208 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-20 18:58:33,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:58:33,223 INFO L225 Difference]: With dead ends: 4330 [2022-11-20 18:58:33,223 INFO L226 Difference]: Without dead ends: 4330 [2022-11-20 18:58:33,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 18:58:33,224 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 18:58:33,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 52 Unchecked, 0.2s Time] [2022-11-20 18:58:33,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4330 states. [2022-11-20 18:58:33,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4330 to 4330. [2022-11-20 18:58:33,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4330 states, 4009 states have (on average 4.674731853330007) internal successors, (18741), 4329 states have internal predecessors, (18741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:33,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4330 states to 4330 states and 18741 transitions. [2022-11-20 18:58:33,360 INFO L78 Accepts]: Start accepts. Automaton has 4330 states and 18741 transitions. Word has length 4 [2022-11-20 18:58:33,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:58:33,361 INFO L495 AbstractCegarLoop]: Abstraction has 4330 states and 18741 transitions. [2022-11-20 18:58:33,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:33,361 INFO L276 IsEmpty]: Start isEmpty. Operand 4330 states and 18741 transitions. [2022-11-20 18:58:33,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 18:58:33,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:58:33,362 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 18:58:33,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-11-20 18:58:33,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:58:33,573 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 18:58:33,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:58:33,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1199219144, now seen corresponding path program 1 times [2022-11-20 18:58:33,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 18:58:33,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [959291522] [2022-11-20 18:58:33,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:58:33,574 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:58:33,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 18:58:33,575 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 18:58:33,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-20 18:58:33,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:58:33,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 18:58:33,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:58:33,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:58:33,858 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2022-11-20 18:58:33,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 74 [2022-11-20 18:58:34,257 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-20 18:58:34,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-20 18:58:34,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:58:34,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 18:58:34,394 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 18:58:34,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [959291522] [2022-11-20 18:58:34,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [959291522] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 18:58:34,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 18:58:34,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 18:58:34,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662403338] [2022-11-20 18:58:34,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 18:58:34,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 18:58:34,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 18:58:34,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 18:58:34,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 18:58:34,397 INFO L87 Difference]: Start difference. First operand 4330 states and 18741 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:34,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:58:34,585 INFO L93 Difference]: Finished difference Result 4333 states and 18751 transitions. [2022-11-20 18:58:34,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 18:58:34,586 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 18:58:34,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:58:34,604 INFO L225 Difference]: With dead ends: 4333 [2022-11-20 18:58:34,604 INFO L226 Difference]: Without dead ends: 4333 [2022-11-20 18:58:34,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 18:58:34,605 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 18:58:34,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 52 Unchecked, 0.1s Time] [2022-11-20 18:58:34,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4333 states. [2022-11-20 18:58:34,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4333 to 4333. [2022-11-20 18:58:34,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4333 states, 4012 states have (on average 4.673728813559322) internal successors, (18751), 4332 states have internal predecessors, (18751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:34,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4333 states to 4333 states and 18751 transitions. [2022-11-20 18:58:34,789 INFO L78 Accepts]: Start accepts. Automaton has 4333 states and 18751 transitions. Word has length 5 [2022-11-20 18:58:34,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:58:34,789 INFO L495 AbstractCegarLoop]: Abstraction has 4333 states and 18751 transitions. [2022-11-20 18:58:34,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:34,790 INFO L276 IsEmpty]: Start isEmpty. Operand 4333 states and 18751 transitions. [2022-11-20 18:58:34,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 18:58:34,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:58:34,790 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 18:58:34,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-20 18:58:35,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:58:35,002 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 18:58:35,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:58:35,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1199219145, now seen corresponding path program 1 times [2022-11-20 18:58:35,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 18:58:35,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1137514480] [2022-11-20 18:58:35,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:58:35,003 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:58:35,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 18:58:35,005 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 18:58:35,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-20 18:58:35,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:58:35,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 18:58:35,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:58:35,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:58:35,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:58:35,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:58:35,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:58:35,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:58:35,364 INFO L321 Elim1Store]: treesize reduction 56, result has 37.8 percent of original size [2022-11-20 18:58:35,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 44 [2022-11-20 18:58:35,423 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-20 18:58:35,423 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 156 treesize of output 155 [2022-11-20 18:58:35,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:58:35,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 18:58:35,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:58:35,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 18:58:35,579 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 18:58:35,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1137514480] [2022-11-20 18:58:35,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1137514480] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 18:58:35,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 18:58:35,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 18:58:35,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094741486] [2022-11-20 18:58:35,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 18:58:35,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 18:58:35,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 18:58:35,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 18:58:35,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 18:58:35,582 INFO L87 Difference]: Start difference. First operand 4333 states and 18751 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:35,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:58:35,879 INFO L93 Difference]: Finished difference Result 4148 states and 18019 transitions. [2022-11-20 18:58:35,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 18:58:35,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 18:58:35,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:58:35,898 INFO L225 Difference]: With dead ends: 4148 [2022-11-20 18:58:35,898 INFO L226 Difference]: Without dead ends: 4148 [2022-11-20 18:58:35,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 18:58:35,899 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 55 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 18:58:35,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 6 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 1 Unchecked, 0.3s Time] [2022-11-20 18:58:35,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4148 states. [2022-11-20 18:58:36,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4148 to 4148. [2022-11-20 18:58:36,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4148 states, 3857 states have (on average 4.671765620948924) internal successors, (18019), 4147 states have internal predecessors, (18019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:36,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4148 states to 4148 states and 18019 transitions. [2022-11-20 18:58:36,045 INFO L78 Accepts]: Start accepts. Automaton has 4148 states and 18019 transitions. Word has length 5 [2022-11-20 18:58:36,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:58:36,045 INFO L495 AbstractCegarLoop]: Abstraction has 4148 states and 18019 transitions. [2022-11-20 18:58:36,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:36,045 INFO L276 IsEmpty]: Start isEmpty. Operand 4148 states and 18019 transitions. [2022-11-20 18:58:36,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 18:58:36,046 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:58:36,046 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 18:58:36,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-20 18:58:36,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:58:36,247 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 18:58:36,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:58:36,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1197493557, now seen corresponding path program 1 times [2022-11-20 18:58:36,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 18:58:36,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1005016129] [2022-11-20 18:58:36,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:58:36,248 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 [2022-11-20 18:58:36,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 18:58:36,249 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 18:58:36,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-20 18:58:36,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:58:36,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 18:58:36,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:58:36,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:58:36,602 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2022-11-20 18:58:36,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 81 [2022-11-20 18:58:37,912 INFO L321 Elim1Store]: treesize reduction 48, result has 31.4 percent of original size [2022-11-20 18:58:37,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 44 [2022-11-20 18:58:38,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 18:58:38,245 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 18:58:38,245 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 18:58:38,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1005016129] [2022-11-20 18:58:38,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1005016129] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 18:58:38,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 18:58:38,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 18:58:38,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589245953] [2022-11-20 18:58:38,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 18:58:38,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 18:58:38,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 18:58:38,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 18:58:38,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 18:58:38,247 INFO L87 Difference]: Start difference. First operand 4148 states and 18019 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:38,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:58:38,443 INFO L93 Difference]: Finished difference Result 4147 states and 18015 transitions. [2022-11-20 18:58:38,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 18:58:38,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 18:58:38,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:58:38,462 INFO L225 Difference]: With dead ends: 4147 [2022-11-20 18:58:38,463 INFO L226 Difference]: Without dead ends: 4147 [2022-11-20 18:58:38,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 18:58:38,463 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 18:58:38,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2022-11-20 18:58:38,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4147 states. [2022-11-20 18:58:38,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4147 to 4143. [2022-11-20 18:58:38,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4143 states, 3853 states have (on average 4.67324162989878) internal successors, (18006), 4142 states have internal predecessors, (18006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:38,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4143 states to 4143 states and 18006 transitions. [2022-11-20 18:58:38,636 INFO L78 Accepts]: Start accepts. Automaton has 4143 states and 18006 transitions. Word has length 5 [2022-11-20 18:58:38,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:58:38,637 INFO L495 AbstractCegarLoop]: Abstraction has 4143 states and 18006 transitions. [2022-11-20 18:58:38,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:38,637 INFO L276 IsEmpty]: Start isEmpty. Operand 4143 states and 18006 transitions. [2022-11-20 18:58:38,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 18:58:38,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:58:38,638 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 18:58:38,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -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)] Ended with exit code 0 [2022-11-20 18:58:38,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:58:38,850 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 18:58:38,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:58:38,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1480083457, now seen corresponding path program 1 times [2022-11-20 18:58:38,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 18:58:38,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1235067689] [2022-11-20 18:58:38,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:58:38,851 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:58:38,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 18:58:38,853 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 18:58:38,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-20 18:58:39,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:58:39,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 18:58:39,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:58:39,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:58:39,191 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2022-11-20 18:58:39,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 74 [2022-11-20 18:58:40,209 INFO L321 Elim1Store]: treesize reduction 58, result has 27.5 percent of original size [2022-11-20 18:58:40,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 44 [2022-11-20 18:58:40,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 18:58:40,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 18:58:40,518 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 18:58:40,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1235067689] [2022-11-20 18:58:40,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1235067689] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 18:58:40,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 18:58:40,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 18:58:40,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904984132] [2022-11-20 18:58:40,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 18:58:40,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 18:58:40,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 18:58:40,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 18:58:40,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 18:58:40,519 INFO L87 Difference]: Start difference. First operand 4143 states and 18006 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:40,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:58:40,699 INFO L93 Difference]: Finished difference Result 4150 states and 18023 transitions. [2022-11-20 18:58:40,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 18:58:40,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 18:58:40,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:58:40,714 INFO L225 Difference]: With dead ends: 4150 [2022-11-20 18:58:40,715 INFO L226 Difference]: Without dead ends: 4150 [2022-11-20 18:58:40,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 18:58:40,715 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 18:58:40,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 49 Unchecked, 0.1s Time] [2022-11-20 18:58:40,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4150 states. [2022-11-20 18:58:40,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4150 to 4147. [2022-11-20 18:58:40,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4147 states, 3857 states have (on average 4.670728545501685) internal successors, (18015), 4146 states have internal predecessors, (18015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:40,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4147 states to 4147 states and 18015 transitions. [2022-11-20 18:58:40,846 INFO L78 Accepts]: Start accepts. Automaton has 4147 states and 18015 transitions. Word has length 6 [2022-11-20 18:58:40,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:58:40,847 INFO L495 AbstractCegarLoop]: Abstraction has 4147 states and 18015 transitions. [2022-11-20 18:58:40,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:40,847 INFO L276 IsEmpty]: Start isEmpty. Operand 4147 states and 18015 transitions. [2022-11-20 18:58:40,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 18:58:40,848 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:58:40,848 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 18:58:40,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-20 18:58:41,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:58:41,060 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 18:58:41,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:58:41,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1478919340, now seen corresponding path program 1 times [2022-11-20 18:58:41,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 18:58:41,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [248860435] [2022-11-20 18:58:41,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:58:41,061 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:58:41,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 18:58:41,062 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 18:58:41,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-20 18:58:41,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:58:41,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 18:58:41,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:58:41,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:58:41,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 18:58:41,231 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 18:58:41,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [248860435] [2022-11-20 18:58:41,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [248860435] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 18:58:41,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 18:58:41,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 18:58:41,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244394594] [2022-11-20 18:58:41,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 18:58:41,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 18:58:41,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 18:58:41,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 18:58:41,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 18:58:41,234 INFO L87 Difference]: Start difference. First operand 4147 states and 18015 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:41,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:58:41,747 INFO L93 Difference]: Finished difference Result 5571 states and 23251 transitions. [2022-11-20 18:58:41,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 18:58:41,748 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 18:58:41,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:58:41,767 INFO L225 Difference]: With dead ends: 5571 [2022-11-20 18:58:41,767 INFO L226 Difference]: Without dead ends: 5571 [2022-11-20 18:58:41,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 18:58:41,768 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 42 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 18:58:41,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 18 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 18:58:41,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5571 states. [2022-11-20 18:58:41,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5571 to 5309. [2022-11-20 18:58:41,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5309 states, 5019 states have (on average 4.501494321578003) internal successors, (22593), 5308 states have internal predecessors, (22593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:41,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5309 states to 5309 states and 22593 transitions. [2022-11-20 18:58:41,934 INFO L78 Accepts]: Start accepts. Automaton has 5309 states and 22593 transitions. Word has length 6 [2022-11-20 18:58:41,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:58:41,935 INFO L495 AbstractCegarLoop]: Abstraction has 5309 states and 22593 transitions. [2022-11-20 18:58:41,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:41,935 INFO L276 IsEmpty]: Start isEmpty. Operand 5309 states and 22593 transitions. [2022-11-20 18:58:41,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 18:58:41,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:58:41,936 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 18:58:41,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-20 18:58:42,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:58:42,147 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 18:58:42,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:58:42,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1532366662, now seen corresponding path program 1 times [2022-11-20 18:58:42,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 18:58:42,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1711723612] [2022-11-20 18:58:42,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:58:42,148 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:58:42,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 18:58:42,150 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 18:58:42,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-20 18:58:42,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:58:42,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 18:58:42,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:58:42,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:58:42,438 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2022-11-20 18:58:42,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 74 [2022-11-20 18:58:42,808 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-20 18:58:42,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-20 18:58:42,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 18:58:42,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 18:58:42,905 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 18:58:42,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1711723612] [2022-11-20 18:58:42,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1711723612] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 18:58:42,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 18:58:42,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 18:58:42,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766655553] [2022-11-20 18:58:42,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 18:58:42,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 18:58:42,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 18:58:42,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 18:58:42,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 18:58:42,906 INFO L87 Difference]: Start difference. First operand 5309 states and 22593 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:43,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:58:43,081 INFO L93 Difference]: Finished difference Result 5315 states and 22606 transitions. [2022-11-20 18:58:43,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 18:58:43,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 18:58:43,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:58:43,101 INFO L225 Difference]: With dead ends: 5315 [2022-11-20 18:58:43,101 INFO L226 Difference]: Without dead ends: 5315 [2022-11-20 18:58:43,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 18:58:43,102 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 18:58:43,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 49 Unchecked, 0.1s Time] [2022-11-20 18:58:43,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5315 states. [2022-11-20 18:58:43,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5315 to 5312. [2022-11-20 18:58:43,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5312 states, 5022 states have (on average 4.500398247710075) internal successors, (22601), 5311 states have internal predecessors, (22601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:43,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5312 states to 5312 states and 22601 transitions. [2022-11-20 18:58:43,274 INFO L78 Accepts]: Start accepts. Automaton has 5312 states and 22601 transitions. Word has length 6 [2022-11-20 18:58:43,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:58:43,274 INFO L495 AbstractCegarLoop]: Abstraction has 5312 states and 22601 transitions. [2022-11-20 18:58:43,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:43,275 INFO L276 IsEmpty]: Start isEmpty. Operand 5312 states and 22601 transitions. [2022-11-20 18:58:43,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 18:58:43,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:58:43,276 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-20 18:58:43,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-20 18:58:43,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:58:43,487 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 18:58:43,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:58:43,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1534148637, now seen corresponding path program 2 times [2022-11-20 18:58:43,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 18:58:43,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733757892] [2022-11-20 18:58:43,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 18:58:43,489 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:58:43,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 18:58:43,490 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 18:58:43,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-20 18:58:43,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 18:58:43,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 18:58:43,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 18:58:43,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:58:43,834 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 18:58:43,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 18:58:44,009 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:58:44,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:58:44,891 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:58:44,891 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 18:58:44,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [733757892] [2022-11-20 18:58:44,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [733757892] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 18:58:44,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1610007322] [2022-11-20 18:58:44,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 18:58:44,892 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 18:58:44,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 18:58:44,893 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 18:58:44,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-20 18:58:45,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 18:58:45,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 18:58:45,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 18:58:45,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:58:45,392 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 18:58:45,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 18:58:45,466 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:58:45,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:58:45,644 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:58:45,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1610007322] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 18:58:45,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252109094] [2022-11-20 18:58:45,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 18:58:45,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:58:45,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:58:45,646 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 18:58:45,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 18:58:45,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 18:58:45,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 18:58:45,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 18:58:45,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:58:46,061 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 18:58:46,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 18:58:46,143 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:58:46,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:58:46,320 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:58:46,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252109094] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 18:58:46,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 18:58:46,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 10 [2022-11-20 18:58:46,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237103603] [2022-11-20 18:58:46,321 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 18:58:46,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 18:58:46,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 18:58:46,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 18:58:46,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-20 18:58:46,323 INFO L87 Difference]: Start difference. First operand 5312 states and 22601 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:58:50,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 18:58:52,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 18:58:54,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 18:58:56,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 18:58:58,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 18:59:02,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 18:59:07,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:59:07,571 INFO L93 Difference]: Finished difference Result 52947 states and 225665 transitions. [2022-11-20 18:59:07,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 18:59:07,572 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 18:59:07,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:59:07,806 INFO L225 Difference]: With dead ends: 52947 [2022-11-20 18:59:07,806 INFO L226 Difference]: Without dead ends: 52947 [2022-11-20 18:59:07,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=118, Invalid=188, Unknown=0, NotChecked=0, Total=306 [2022-11-20 18:59:07,807 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1401 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 1429 mSolverCounterSat, 73 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1401 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 1503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1429 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.1s IncrementalHoareTripleChecker+Time [2022-11-20 18:59:07,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1401 Valid, 180 Invalid, 1503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1429 Invalid, 1 Unknown, 0 Unchecked, 19.1s Time] [2022-11-20 18:59:07,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52947 states. [2022-11-20 18:59:08,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52947 to 5330. [2022-11-20 18:59:08,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5330 states, 5040 states have (on average 4.49186507936508) internal successors, (22639), 5329 states have internal predecessors, (22639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:59:08,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5330 states to 5330 states and 22639 transitions. [2022-11-20 18:59:08,337 INFO L78 Accepts]: Start accepts. Automaton has 5330 states and 22639 transitions. Word has length 6 [2022-11-20 18:59:08,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:59:08,338 INFO L495 AbstractCegarLoop]: Abstraction has 5330 states and 22639 transitions. [2022-11-20 18:59:08,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:59:08,338 INFO L276 IsEmpty]: Start isEmpty. Operand 5330 states and 22639 transitions. [2022-11-20 18:59:08,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 18:59:08,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:59:08,339 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:59:08,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-20 18:59:08,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-20 18:59:08,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 18:59:08,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:59:08,951 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 18:59:08,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:59:08,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1398146684, now seen corresponding path program 1 times [2022-11-20 18:59:08,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 18:59:08,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473944594] [2022-11-20 18:59:08,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:59:08,952 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:59:08,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 18:59:08,953 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 18:59:08,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-20 18:59:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:59:09,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 18:59:09,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:59:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:59:09,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 18:59:09,137 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 18:59:09,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473944594] [2022-11-20 18:59:09,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473944594] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 18:59:09,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 18:59:09,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 18:59:09,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026901556] [2022-11-20 18:59:09,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 18:59:09,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 18:59:09,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 18:59:09,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 18:59:09,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 18:59:09,140 INFO L87 Difference]: Start difference. First operand 5330 states and 22639 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:59:09,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:59:09,733 INFO L93 Difference]: Finished difference Result 6919 states and 29807 transitions. [2022-11-20 18:59:09,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 18:59:09,734 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 18:59:09,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:59:09,773 INFO L225 Difference]: With dead ends: 6919 [2022-11-20 18:59:09,773 INFO L226 Difference]: Without dead ends: 6913 [2022-11-20 18:59:09,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 18:59:09,774 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 104 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 18:59:09,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 12 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 18:59:09,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6913 states. [2022-11-20 18:59:09,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6913 to 5547. [2022-11-20 18:59:09,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5547 states, 5228 states have (on average 4.785003825554705) internal successors, (25016), 5546 states have internal predecessors, (25016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:59:09,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5547 states to 5547 states and 25016 transitions. [2022-11-20 18:59:09,964 INFO L78 Accepts]: Start accepts. Automaton has 5547 states and 25016 transitions. Word has length 7 [2022-11-20 18:59:09,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:59:09,964 INFO L495 AbstractCegarLoop]: Abstraction has 5547 states and 25016 transitions. [2022-11-20 18:59:09,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:59:09,965 INFO L276 IsEmpty]: Start isEmpty. Operand 5547 states and 25016 transitions. [2022-11-20 18:59:09,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 18:59:09,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:59:09,969 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:59:09,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-20 18:59:10,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:59:10,181 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 18:59:10,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:59:10,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1398391452, now seen corresponding path program 1 times [2022-11-20 18:59:10,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 18:59:10,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [93652540] [2022-11-20 18:59:10,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:59:10,182 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:59:10,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 18:59:10,183 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 18:59:10,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-20 18:59:10,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:59:10,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 18:59:10,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:59:10,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:59:10,470 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-20 18:59:10,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-20 18:59:11,045 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-20 18:59:11,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-20 18:59:11,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:59:11,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 18:59:11,265 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 18:59:11,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [93652540] [2022-11-20 18:59:11,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [93652540] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 18:59:11,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 18:59:11,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 18:59:11,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734964688] [2022-11-20 18:59:11,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 18:59:11,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 18:59:11,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 18:59:11,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 18:59:11,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 18:59:11,267 INFO L87 Difference]: Start difference. First operand 5547 states and 25016 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:59:11,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:59:11,428 INFO L93 Difference]: Finished difference Result 5556 states and 25043 transitions. [2022-11-20 18:59:11,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 18:59:11,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 18:59:11,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:59:11,454 INFO L225 Difference]: With dead ends: 5556 [2022-11-20 18:59:11,454 INFO L226 Difference]: Without dead ends: 5556 [2022-11-20 18:59:11,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 18:59:11,455 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 18:59:11,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 12 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 49 Unchecked, 0.1s Time] [2022-11-20 18:59:11,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5556 states. [2022-11-20 18:59:11,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5556 to 5556. [2022-11-20 18:59:11,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5556 states, 5237 states have (on average 4.781936223028452) internal successors, (25043), 5555 states have internal predecessors, (25043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:59:11,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5556 states to 5556 states and 25043 transitions. [2022-11-20 18:59:11,675 INFO L78 Accepts]: Start accepts. Automaton has 5556 states and 25043 transitions. Word has length 7 [2022-11-20 18:59:11,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:59:11,676 INFO L495 AbstractCegarLoop]: Abstraction has 5556 states and 25043 transitions. [2022-11-20 18:59:11,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:59:11,676 INFO L276 IsEmpty]: Start isEmpty. Operand 5556 states and 25043 transitions. [2022-11-20 18:59:11,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 18:59:11,680 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:59:11,680 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:59:11,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-20 18:59:11,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:59:11,892 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 18:59:11,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:59:11,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1398391454, now seen corresponding path program 1 times [2022-11-20 18:59:11,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 18:59:11,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1479298570] [2022-11-20 18:59:11,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:59:11,893 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:59:11,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 18:59:11,894 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 18:59:11,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-20 18:59:12,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:59:12,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 18:59:12,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:59:12,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:59:12,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:59:12,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:59:12,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:59:12,252 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 18:59:12,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-20 18:59:12,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-20 18:59:12,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:59:12,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 18:59:12,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:59:12,415 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 18:59:12,415 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 18:59:12,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1479298570] [2022-11-20 18:59:12,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1479298570] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 18:59:12,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 18:59:12,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 18:59:12,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527424108] [2022-11-20 18:59:12,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 18:59:12,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 18:59:12,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 18:59:12,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 18:59:12,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 18:59:12,417 INFO L87 Difference]: Start difference. First operand 5556 states and 25043 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:59:12,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:59:12,680 INFO L93 Difference]: Finished difference Result 5480 states and 24806 transitions. [2022-11-20 18:59:12,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 18:59:12,681 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 18:59:12,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:59:12,707 INFO L225 Difference]: With dead ends: 5480 [2022-11-20 18:59:12,707 INFO L226 Difference]: Without dead ends: 5480 [2022-11-20 18:59:12,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 18:59:12,708 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 52 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 18:59:12,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 6 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 1 Unchecked, 0.2s Time] [2022-11-20 18:59:12,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5480 states. [2022-11-20 18:59:12,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5480 to 5480. [2022-11-20 18:59:12,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5480 states, 5182 states have (on average 4.786954843689695) internal successors, (24806), 5479 states have internal predecessors, (24806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:59:12,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5480 states to 5480 states and 24806 transitions. [2022-11-20 18:59:12,873 INFO L78 Accepts]: Start accepts. Automaton has 5480 states and 24806 transitions. Word has length 7 [2022-11-20 18:59:12,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:59:12,873 INFO L495 AbstractCegarLoop]: Abstraction has 5480 states and 24806 transitions. [2022-11-20 18:59:12,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:59:12,874 INFO L276 IsEmpty]: Start isEmpty. Operand 5480 states and 24806 transitions. [2022-11-20 18:59:12,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 18:59:12,874 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:59:12,874 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:59:12,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-20 18:59:13,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:59:13,086 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 18:59:13,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:59:13,086 INFO L85 PathProgramCache]: Analyzing trace with hash -259897523, now seen corresponding path program 1 times [2022-11-20 18:59:13,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 18:59:13,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [638619274] [2022-11-20 18:59:13,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:59:13,087 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:59:13,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 18:59:13,088 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 18:59:13,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-20 18:59:13,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:59:13,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 18:59:13,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:59:13,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:59:13,424 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2022-11-20 18:59:13,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 74 [2022-11-20 18:59:13,786 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-20 18:59:13,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-20 18:59:13,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 18:59:13,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 18:59:13,905 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 18:59:13,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [638619274] [2022-11-20 18:59:13,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [638619274] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 18:59:13,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 18:59:13,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 18:59:13,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847372322] [2022-11-20 18:59:13,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 18:59:13,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 18:59:13,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 18:59:13,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 18:59:13,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 18:59:13,906 INFO L87 Difference]: Start difference. First operand 5480 states and 24806 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:59:14,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:59:14,059 INFO L93 Difference]: Finished difference Result 5478 states and 24800 transitions. [2022-11-20 18:59:14,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 18:59:14,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 18:59:14,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:59:14,079 INFO L225 Difference]: With dead ends: 5478 [2022-11-20 18:59:14,079 INFO L226 Difference]: Without dead ends: 5478 [2022-11-20 18:59:14,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 18:59:14,080 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 18:59:14,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2022-11-20 18:59:14,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5478 states. [2022-11-20 18:59:14,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5478 to 5475. [2022-11-20 18:59:14,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5475 states, 5177 states have (on average 4.789067027235851) internal successors, (24793), 5474 states have internal predecessors, (24793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:59:14,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5475 states to 5475 states and 24793 transitions. [2022-11-20 18:59:14,203 INFO L78 Accepts]: Start accepts. Automaton has 5475 states and 24793 transitions. Word has length 7 [2022-11-20 18:59:14,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:59:14,203 INFO L495 AbstractCegarLoop]: Abstraction has 5475 states and 24793 transitions. [2022-11-20 18:59:14,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:59:14,203 INFO L276 IsEmpty]: Start isEmpty. Operand 5475 states and 24793 transitions. [2022-11-20 18:59:14,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 18:59:14,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:59:14,204 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:59:14,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-20 18:59:14,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:59:14,415 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 18:59:14,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:59:14,415 INFO L85 PathProgramCache]: Analyzing trace with hash -258733406, now seen corresponding path program 1 times [2022-11-20 18:59:14,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 18:59:14,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [496747695] [2022-11-20 18:59:14,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:59:14,416 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:59:14,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 18:59:14,417 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 18:59:14,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-20 18:59:14,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:59:14,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 18:59:14,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:59:14,740 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-20 18:59:14,741 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-20 18:59:14,775 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 18:59:14,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 18:59:14,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 18:59:14,797 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 18:59:14,798 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 18:59:14,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [496747695] [2022-11-20 18:59:14,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [496747695] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 18:59:14,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 18:59:14,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 18:59:14,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692442185] [2022-11-20 18:59:14,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 18:59:14,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 18:59:14,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 18:59:14,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 18:59:14,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 18:59:14,799 INFO L87 Difference]: Start difference. First operand 5475 states and 24793 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:59:15,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:59:15,025 INFO L93 Difference]: Finished difference Result 4139 states and 18041 transitions. [2022-11-20 18:59:15,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 18:59:15,026 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 18:59:15,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:59:15,039 INFO L225 Difference]: With dead ends: 4139 [2022-11-20 18:59:15,040 INFO L226 Difference]: Without dead ends: 4139 [2022-11-20 18:59:15,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 18:59:15,040 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 94 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 18:59:15,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 6 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 18:59:15,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4139 states. [2022-11-20 18:59:15,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4139 to 4139. [2022-11-20 18:59:15,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4139 states, 3977 states have (on average 4.5363339200402315) internal successors, (18041), 4138 states have internal predecessors, (18041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:59:15,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4139 states to 4139 states and 18041 transitions. [2022-11-20 18:59:15,134 INFO L78 Accepts]: Start accepts. Automaton has 4139 states and 18041 transitions. Word has length 7 [2022-11-20 18:59:15,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:59:15,134 INFO L495 AbstractCegarLoop]: Abstraction has 4139 states and 18041 transitions. [2022-11-20 18:59:15,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:59:15,134 INFO L276 IsEmpty]: Start isEmpty. Operand 4139 states and 18041 transitions. [2022-11-20 18:59:15,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 18:59:15,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:59:15,135 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:59:15,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-20 18:59:15,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:59:15,335 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 18:59:15,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:59:15,336 INFO L85 PathProgramCache]: Analyzing trace with hash -258733405, now seen corresponding path program 1 times [2022-11-20 18:59:15,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 18:59:15,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [214884593] [2022-11-20 18:59:15,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:59:15,336 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:59:15,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 18:59:15,337 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 18:59:15,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-20 18:59:15,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:59:15,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 18:59:15,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:59:15,769 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 18:59:15,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 18:59:16,041 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-20 18:59:16,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-20 18:59:16,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:59:16,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 18:59:16,236 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 18:59:16,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 18:59:16,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:59:16,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:59:17,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:59:17,873 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 18:59:17,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [214884593] [2022-11-20 18:59:17,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [214884593] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 18:59:17,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2047517525] [2022-11-20 18:59:17,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:59:17,873 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 18:59:17,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 18:59:17,874 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 18:59:17,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-20 18:59:18,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:59:18,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 18:59:18,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:59:18,420 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 18:59:18,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 18:59:18,677 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-20 18:59:18,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-20 18:59:18,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:59:18,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 18:59:18,907 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 18:59:18,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 18:59:18,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:59:18,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:59:20,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:59:20,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2047517525] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 18:59:20,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504514923] [2022-11-20 18:59:20,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:59:20,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:59:20,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:59:20,449 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 18:59:20,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-20 18:59:20,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:59:20,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 18:59:20,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:59:20,868 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 18:59:20,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 18:59:21,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:59:21,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 18:59:21,025 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 18:59:21,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 18:59:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:59:21,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:59:26,348 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:59:26,348 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 65 treesize of output 89 [2022-11-20 18:59:29,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:59:29,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504514923] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 18:59:29,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 18:59:29,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 11 [2022-11-20 18:59:29,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142744572] [2022-11-20 18:59:29,639 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 18:59:29,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 18:59:29,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 18:59:29,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 18:59:29,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=106, Unknown=3, NotChecked=0, Total=156 [2022-11-20 18:59:29,640 INFO L87 Difference]: Start difference. First operand 4139 states and 18041 transitions. Second operand has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:59:32,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:59:32,892 INFO L93 Difference]: Finished difference Result 4155 states and 18071 transitions. [2022-11-20 18:59:32,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 18:59:32,892 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 18:59:32,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:59:32,905 INFO L225 Difference]: With dead ends: 4155 [2022-11-20 18:59:32,905 INFO L226 Difference]: Without dead ends: 4155 [2022-11-20 18:59:32,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=47, Invalid=106, Unknown=3, NotChecked=0, Total=156 [2022-11-20 18:59:32,906 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 224 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 18:59:32,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 49 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 224 Unchecked, 0.3s Time] [2022-11-20 18:59:32,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4155 states. [2022-11-20 18:59:32,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4155 to 4145. [2022-11-20 18:59:32,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4145 states, 3983 states have (on average 4.532764248054231) internal successors, (18054), 4144 states have internal predecessors, (18054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:59:32,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4145 states to 4145 states and 18054 transitions. [2022-11-20 18:59:32,987 INFO L78 Accepts]: Start accepts. Automaton has 4145 states and 18054 transitions. Word has length 7 [2022-11-20 18:59:32,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:59:32,987 INFO L495 AbstractCegarLoop]: Abstraction has 4145 states and 18054 transitions. [2022-11-20 18:59:32,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:59:32,987 INFO L276 IsEmpty]: Start isEmpty. Operand 4145 states and 18054 transitions. [2022-11-20 18:59:32,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 18:59:32,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:59:32,988 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:59:33,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -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)] Ended with exit code 0 [2022-11-20 18:59:33,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2022-11-20 18:59:33,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-20 18:59:33,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:59:33,600 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 18:59:33,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:59:33,601 INFO L85 PathProgramCache]: Analyzing trace with hash -725997805, now seen corresponding path program 1 times [2022-11-20 18:59:33,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 18:59:33,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1911407608] [2022-11-20 18:59:33,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:59:33,601 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:59:33,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 18:59:33,602 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 18:59:33,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-20 18:59:33,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:59:33,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 18:59:33,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:59:33,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:59:33,992 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-20 18:59:33,992 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 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-20 18:59:34,099 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 18:59:34,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 18:59:34,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 18:59:34,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 18:59:34,183 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 18:59:34,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1911407608] [2022-11-20 18:59:34,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1911407608] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 18:59:34,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 18:59:34,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 18:59:34,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460485048] [2022-11-20 18:59:34,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 18:59:34,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 18:59:34,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 18:59:34,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 18:59:34,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 18:59:34,185 INFO L87 Difference]: Start difference. First operand 4145 states and 18054 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:59:34,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:59:34,353 INFO L93 Difference]: Finished difference Result 4145 states and 18060 transitions. [2022-11-20 18:59:34,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 18:59:34,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 18:59:34,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:59:34,367 INFO L225 Difference]: With dead ends: 4145 [2022-11-20 18:59:34,367 INFO L226 Difference]: Without dead ends: 4145 [2022-11-20 18:59:34,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 18:59:34,368 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 18:59:34,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 12 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-11-20 18:59:34,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4145 states. [2022-11-20 18:59:34,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4145 to 4136. [2022-11-20 18:59:34,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4136 states, 3974 states have (on average 4.538751887267237) internal successors, (18037), 4135 states have internal predecessors, (18037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:59:34,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4136 states to 4136 states and 18037 transitions. [2022-11-20 18:59:34,449 INFO L78 Accepts]: Start accepts. Automaton has 4136 states and 18037 transitions. Word has length 8 [2022-11-20 18:59:34,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:59:34,449 INFO L495 AbstractCegarLoop]: Abstraction has 4136 states and 18037 transitions. [2022-11-20 18:59:34,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:59:34,450 INFO L276 IsEmpty]: Start isEmpty. Operand 4136 states and 18037 transitions. [2022-11-20 18:59:34,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 18:59:34,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:59:34,450 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:59:34,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-20 18:59:34,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:59:34,659 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 18:59:34,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:59:34,659 INFO L85 PathProgramCache]: Analyzing trace with hash 400455448, now seen corresponding path program 1 times [2022-11-20 18:59:34,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 18:59:34,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1114441835] [2022-11-20 18:59:34,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:59:34,660 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:59:34,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 18:59:34,661 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 18:59:34,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-20 18:59:34,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:59:34,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 18:59:34,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:59:34,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 18:59:34,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:59:34,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 18:59:34,841 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 18:59:34,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1114441835] [2022-11-20 18:59:34,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1114441835] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 18:59:34,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 18:59:34,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 18:59:34,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622457473] [2022-11-20 18:59:34,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 18:59:34,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 18:59:34,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 18:59:34,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 18:59:34,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 18:59:34,842 INFO L87 Difference]: Start difference. First operand 4136 states and 18037 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) [2022-11-20 18:59:35,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:59:35,114 INFO L93 Difference]: Finished difference Result 2892 states and 12483 transitions. [2022-11-20 18:59:35,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 18:59:35,115 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 [2022-11-20 18:59:35,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:59:35,123 INFO L225 Difference]: With dead ends: 2892 [2022-11-20 18:59:35,123 INFO L226 Difference]: Without dead ends: 2892 [2022-11-20 18:59:35,123 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 [2022-11-20 18:59:35,124 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 87 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 18:59:35,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 6 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 18:59:35,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2892 states. [2022-11-20 18:59:35,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2892 to 2892. [2022-11-20 18:59:35,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2892 states, 2807 states have (on average 4.4470965443534025) internal successors, (12483), 2891 states have internal predecessors, (12483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:59:35,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2892 states to 2892 states and 12483 transitions. [2022-11-20 18:59:35,192 INFO L78 Accepts]: Start accepts. Automaton has 2892 states and 12483 transitions. Word has length 8 [2022-11-20 18:59:35,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:59:35,193 INFO L495 AbstractCegarLoop]: Abstraction has 2892 states and 12483 transitions. [2022-11-20 18:59:35,193 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) [2022-11-20 18:59:35,193 INFO L276 IsEmpty]: Start isEmpty. Operand 2892 states and 12483 transitions. [2022-11-20 18:59:35,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 18:59:35,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:59:35,193 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:59:35,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-20 18:59:35,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:59:35,394 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 18:59:35,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:59:35,395 INFO L85 PathProgramCache]: Analyzing trace with hash 400455449, now seen corresponding path program 1 times [2022-11-20 18:59:35,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 18:59:35,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1785159843] [2022-11-20 18:59:35,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:59:35,395 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:59:35,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 18:59:35,396 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 18:59:35,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-20 18:59:35,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:59:35,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 18:59:35,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:59:35,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 18:59:35,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 18:59:35,632 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 18:59:35,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1785159843] [2022-11-20 18:59:35,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1785159843] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 18:59:35,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 18:59:35,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 18:59:35,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542923630] [2022-11-20 18:59:35,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 18:59:35,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 18:59:35,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 18:59:35,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 18:59:35,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 18:59:35,634 INFO L87 Difference]: Start difference. First operand 2892 states and 12483 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) [2022-11-20 18:59:36,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:59:36,219 INFO L93 Difference]: Finished difference Result 4367 states and 17956 transitions. [2022-11-20 18:59:36,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 18:59:36,220 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 [2022-11-20 18:59:36,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:59:36,232 INFO L225 Difference]: With dead ends: 4367 [2022-11-20 18:59:36,232 INFO L226 Difference]: Without dead ends: 4319 [2022-11-20 18:59:36,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 18:59:36,233 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 73 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 18:59:36,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 18 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 18:59:36,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4319 states. [2022-11-20 18:59:36,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4319 to 4124. [2022-11-20 18:59:36,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4124 states, 4039 states have (on average 4.297350829413221) internal successors, (17357), 4123 states have internal predecessors, (17357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:59:36,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4124 states to 4124 states and 17357 transitions. [2022-11-20 18:59:36,308 INFO L78 Accepts]: Start accepts. Automaton has 4124 states and 17357 transitions. Word has length 8 [2022-11-20 18:59:36,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:59:36,308 INFO L495 AbstractCegarLoop]: Abstraction has 4124 states and 17357 transitions. [2022-11-20 18:59:36,308 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) [2022-11-20 18:59:36,308 INFO L276 IsEmpty]: Start isEmpty. Operand 4124 states and 17357 transitions. [2022-11-20 18:59:36,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 18:59:36,309 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:59:36,309 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:59:36,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-20 18:59:36,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:59:36,509 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 18:59:36,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:59:36,510 INFO L85 PathProgramCache]: Analyzing trace with hash 533104240, now seen corresponding path program 1 times [2022-11-20 18:59:36,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 18:59:36,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1950451851] [2022-11-20 18:59:36,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:59:36,510 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:59:36,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 18:59:36,511 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 18:59:36,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-20 18:59:36,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:59:36,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 18:59:36,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:59:37,053 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 18:59:37,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 18:59:37,405 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-20 18:59:37,406 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-20 18:59:37,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:59:37,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 18:59:37,651 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 18:59:37,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 18:59:37,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 18:59:37,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:59:44,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 18:59:44,722 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 18:59:44,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1950451851] [2022-11-20 18:59:44,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1950451851] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 18:59:44,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [969272383] [2022-11-20 18:59:44,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:59:44,723 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 18:59:44,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 18:59:44,724 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 18:59:44,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-20 18:59:45,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:59:45,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 18:59:45,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:59:45,452 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 18:59:45,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 18:59:45,799 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-20 18:59:45,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-20 18:59:46,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:59:46,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 18:59:46,091 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 18:59:46,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 18:59:46,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 18:59:46,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:59:49,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 18:59:49,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [969272383] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 18:59:49,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199491491] [2022-11-20 18:59:49,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:59:49,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 18:59:49,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 18:59:49,587 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 18:59:49,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-20 18:59:49,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:59:49,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 18:59:49,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:59:50,038 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 18:59:50,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 18:59:50,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 18:59:50,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 18:59:50,228 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 18:59:50,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 18:59:50,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 18:59:50,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 18:59:52,605 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 18:59:52,605 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 65 treesize of output 89 [2022-11-20 18:59:56,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 18:59:56,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199491491] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 18:59:56,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 18:59:56,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 10 [2022-11-20 18:59:56,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342661045] [2022-11-20 18:59:56,219 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 18:59:56,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 18:59:56,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 18:59:56,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 18:59:56,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=91, Unknown=1, NotChecked=0, Total=132 [2022-11-20 18:59:56,220 INFO L87 Difference]: Start difference. First operand 4124 states and 17357 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 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) [2022-11-20 18:59:56,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:59:56,665 INFO L93 Difference]: Finished difference Result 4166 states and 17444 transitions. [2022-11-20 18:59:56,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 18:59:56,666 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 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 8 [2022-11-20 18:59:56,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:59:56,679 INFO L225 Difference]: With dead ends: 4166 [2022-11-20 18:59:56,679 INFO L226 Difference]: Without dead ends: 4166 [2022-11-20 18:59:56,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=40, Invalid=91, Unknown=1, NotChecked=0, Total=132 [2022-11-20 18:59:56,680 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 18:59:56,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 49 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 125 Invalid, 0 Unknown, 169 Unchecked, 0.4s Time] [2022-11-20 18:59:56,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4166 states. [2022-11-20 18:59:56,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4166 to 4138. [2022-11-20 18:59:56,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4138 states, 4053 states have (on average 4.290155440414508) internal successors, (17388), 4137 states have internal predecessors, (17388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:59:56,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4138 states to 4138 states and 17388 transitions. [2022-11-20 18:59:56,776 INFO L78 Accepts]: Start accepts. Automaton has 4138 states and 17388 transitions. Word has length 8 [2022-11-20 18:59:56,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:59:56,777 INFO L495 AbstractCegarLoop]: Abstraction has 4138 states and 17388 transitions. [2022-11-20 18:59:56,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 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) [2022-11-20 18:59:56,777 INFO L276 IsEmpty]: Start isEmpty. Operand 4138 states and 17388 transitions. [2022-11-20 18:59:56,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 18:59:56,777 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:59:56,777 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:59:56,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-20 18:59:56,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-20 18:59:57,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2022-11-20 18:59:57,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 18:59:57,378 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 18:59:57,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:59:57,379 INFO L85 PathProgramCache]: Analyzing trace with hash 569204943, now seen corresponding path program 1 times [2022-11-20 18:59:57,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 18:59:57,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1734012452] [2022-11-20 18:59:57,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:59:57,379 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:59:57,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 18:59:57,380 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 18:59:57,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-20 18:59:57,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:59:57,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 18:59:57,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 18:59:57,835 INFO L321 Elim1Store]: treesize reduction 178, result has 20.2 percent of original size [2022-11-20 18:59:57,835 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 7 case distinctions, treesize of input 49 treesize of output 78 [2022-11-20 18:59:58,496 INFO L321 Elim1Store]: treesize reduction 54, result has 32.5 percent of original size [2022-11-20 18:59:58,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 52 [2022-11-20 18:59:59,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 18:59:59,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 18:59:59,034 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 18:59:59,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1734012452] [2022-11-20 18:59:59,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1734012452] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 18:59:59,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 18:59:59,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 18:59:59,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299107462] [2022-11-20 18:59:59,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 18:59:59,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 18:59:59,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 18:59:59,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 18:59:59,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 18:59:59,036 INFO L87 Difference]: Start difference. First operand 4138 states and 17388 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:59:59,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 18:59:59,209 INFO L93 Difference]: Finished difference Result 4138 states and 17386 transitions. [2022-11-20 18:59:59,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 18:59:59,209 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 18:59:59,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 18:59:59,221 INFO L225 Difference]: With dead ends: 4138 [2022-11-20 18:59:59,221 INFO L226 Difference]: Without dead ends: 4138 [2022-11-20 18:59:59,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 18:59:59,222 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 18:59:59,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 80 Unchecked, 0.1s Time] [2022-11-20 18:59:59,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4138 states. [2022-11-20 18:59:59,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4138 to 4138. [2022-11-20 18:59:59,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4138 states, 4053 states have (on average 4.28966197878115) internal successors, (17386), 4137 states have internal predecessors, (17386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:59:59,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4138 states to 4138 states and 17386 transitions. [2022-11-20 18:59:59,299 INFO L78 Accepts]: Start accepts. Automaton has 4138 states and 17386 transitions. Word has length 8 [2022-11-20 18:59:59,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 18:59:59,299 INFO L495 AbstractCegarLoop]: Abstraction has 4138 states and 17386 transitions. [2022-11-20 18:59:59,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 18:59:59,299 INFO L276 IsEmpty]: Start isEmpty. Operand 4138 states and 17386 transitions. [2022-11-20 18:59:59,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 18:59:59,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 18:59:59,300 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 18:59:59,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-20 18:59:59,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:59:59,500 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 18:59:59,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 18:59:59,501 INFO L85 PathProgramCache]: Analyzing trace with hash 569205569, now seen corresponding path program 1 times [2022-11-20 18:59:59,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 18:59:59,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1875550901] [2022-11-20 18:59:59,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 18:59:59,501 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 18:59:59,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 18:59:59,502 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 18:59:59,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-20 18:59:59,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 18:59:59,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 18:59:59,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:00:00,065 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 19:00:00,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 19:00:00,416 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-20 19:00:00,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-20 19:00:00,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:00:00,650 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 [2022-11-20 19:00:00,667 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 19:00:00,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 19:00:00,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:00:00,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:00:05,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:00:05,597 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:00:05,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1875550901] [2022-11-20 19:00:05,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1875550901] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:00:05,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1962801057] [2022-11-20 19:00:05,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:00:05,597 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:00:05,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:00:05,599 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:00:05,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-11-20 19:00:05,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:00:05,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 19:00:05,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:00:06,312 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 19:00:06,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 19:00:06,671 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-20 19:00:06,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-20 19:00:06,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:00:06,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 19:00:06,953 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 19:00:06,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 19:00:07,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:00:07,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:00:10,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:00:10,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1962801057] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:00:10,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957522352] [2022-11-20 19:00:10,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:00:10,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:00:10,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:00:10,385 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:00:10,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-20 19:00:10,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:00:10,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 19:00:10,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:00:10,922 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 19:00:10,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 19:00:11,279 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-20 19:00:11,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-20 19:00:11,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:00:11,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 19:00:11,450 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 19:00:11,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 19:00:11,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:00:11,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:00:13,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:00:13,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957522352] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:00:13,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 19:00:13,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 8 [2022-11-20 19:00:13,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607576560] [2022-11-20 19:00:13,400 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 19:00:13,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 19:00:13,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:00:13,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 19:00:13,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-20 19:00:13,402 INFO L87 Difference]: Start difference. First operand 4138 states and 17386 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:00:13,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:00:13,747 INFO L93 Difference]: Finished difference Result 4155 states and 17416 transitions. [2022-11-20 19:00:13,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 19:00:13,748 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 19:00:13,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:00:13,760 INFO L225 Difference]: With dead ends: 4155 [2022-11-20 19:00:13,761 INFO L226 Difference]: Without dead ends: 4155 [2022-11-20 19:00:13,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-20 19:00:13,761 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 6 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 19:00:13,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 33 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 139 Unchecked, 0.3s Time] [2022-11-20 19:00:13,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4155 states. [2022-11-20 19:00:13,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4155 to 4141. [2022-11-20 19:00:13,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4141 states, 4056 states have (on average 4.288214990138067) internal successors, (17393), 4140 states have internal predecessors, (17393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:00:13,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4141 states to 4141 states and 17393 transitions. [2022-11-20 19:00:13,838 INFO L78 Accepts]: Start accepts. Automaton has 4141 states and 17393 transitions. Word has length 8 [2022-11-20 19:00:13,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:00:13,838 INFO L495 AbstractCegarLoop]: Abstraction has 4141 states and 17393 transitions. [2022-11-20 19:00:13,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:00:13,838 INFO L276 IsEmpty]: Start isEmpty. Operand 4141 states and 17393 transitions. [2022-11-20 19:00:13,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 19:00:13,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:00:13,839 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:00:13,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2022-11-20 19:00:14,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-20 19:00:14,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-20 19:00:14,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:00:14,440 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 19:00:14,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:00:14,440 INFO L85 PathProgramCache]: Analyzing trace with hash 569449742, now seen corresponding path program 1 times [2022-11-20 19:00:14,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:00:14,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1335925743] [2022-11-20 19:00:14,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:00:14,441 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:00:14,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:00:14,442 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:00:14,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-20 19:00:14,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:00:14,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 19:00:14,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:00:14,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:00:14,841 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-20 19:00:14,841 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 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-20 19:00:15,667 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-20 19:00:15,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-20 19:00:15,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:00:15,980 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:00:15,980 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:00:15,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1335925743] [2022-11-20 19:00:15,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1335925743] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:00:15,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:00:15,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 19:00:15,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792844908] [2022-11-20 19:00:15,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:00:15,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:00:15,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:00:15,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:00:15,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:00:15,981 INFO L87 Difference]: Start difference. First operand 4141 states and 17393 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:00:16,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:00:16,157 INFO L93 Difference]: Finished difference Result 4137 states and 17379 transitions. [2022-11-20 19:00:16,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:00:16,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 19:00:16,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:00:16,170 INFO L225 Difference]: With dead ends: 4137 [2022-11-20 19:00:16,170 INFO L226 Difference]: Without dead ends: 4137 [2022-11-20 19:00:16,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:00:16,170 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:00:16,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 12 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2022-11-20 19:00:16,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4137 states. [2022-11-20 19:00:16,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4137 to 4137. [2022-11-20 19:00:16,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4137 states, 4052 states have (on average 4.288993089832181) internal successors, (17379), 4136 states have internal predecessors, (17379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:00:16,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4137 states to 4137 states and 17379 transitions. [2022-11-20 19:00:16,245 INFO L78 Accepts]: Start accepts. Automaton has 4137 states and 17379 transitions. Word has length 8 [2022-11-20 19:00:16,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:00:16,245 INFO L495 AbstractCegarLoop]: Abstraction has 4137 states and 17379 transitions. [2022-11-20 19:00:16,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:00:16,245 INFO L276 IsEmpty]: Start isEmpty. Operand 4137 states and 17379 transitions. [2022-11-20 19:00:16,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 19:00:16,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:00:16,246 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:00:16,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-20 19:00:16,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:00:16,451 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 19:00:16,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:00:16,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1031102078, now seen corresponding path program 1 times [2022-11-20 19:00:16,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:00:16,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1813111317] [2022-11-20 19:00:16,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:00:16,452 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:00:16,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:00:16,453 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:00:16,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-20 19:00:16,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:00:16,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 19:00:16,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:00:16,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:00:16,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:00:16,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:00:18,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:00:18,540 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:00:18,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1813111317] [2022-11-20 19:00:18,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1813111317] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:00:18,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1028789812] [2022-11-20 19:00:18,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:00:18,540 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:00:18,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:00:18,541 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:00:18,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-20 19:00:18,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:00:18,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 19:00:18,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:00:18,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:00:19,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:00:19,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:00:19,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:00:19,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1028789812] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:00:19,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361181540] [2022-11-20 19:00:19,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:00:19,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:00:19,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:00:19,561 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:00:19,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-20 19:00:19,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:00:19,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 19:00:19,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:00:19,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:00:19,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:00:19,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:00:20,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:00:20,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361181540] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:00:20,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 19:00:20,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 9 [2022-11-20 19:00:20,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703891303] [2022-11-20 19:00:20,310 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 19:00:20,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 19:00:20,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:00:20,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 19:00:20,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-20 19:00:20,311 INFO L87 Difference]: Start difference. First operand 4137 states and 17379 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:00:21,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:00:21,883 INFO L93 Difference]: Finished difference Result 4213 states and 17578 transitions. [2022-11-20 19:00:21,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 19:00:21,884 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 19:00:21,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:00:21,901 INFO L225 Difference]: With dead ends: 4213 [2022-11-20 19:00:21,901 INFO L226 Difference]: Without dead ends: 4213 [2022-11-20 19:00:21,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-11-20 19:00:21,902 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 19:00:21,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 55 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 163 Invalid, 0 Unknown, 145 Unchecked, 0.6s Time] [2022-11-20 19:00:21,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4213 states. [2022-11-20 19:00:21,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4213 to 4172. [2022-11-20 19:00:21,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4172 states, 4087 states have (on average 4.2752630291167115) internal successors, (17473), 4171 states have internal predecessors, (17473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:00:22,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4172 states to 4172 states and 17473 transitions. [2022-11-20 19:00:22,007 INFO L78 Accepts]: Start accepts. Automaton has 4172 states and 17473 transitions. Word has length 9 [2022-11-20 19:00:22,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:00:22,007 INFO L495 AbstractCegarLoop]: Abstraction has 4172 states and 17473 transitions. [2022-11-20 19:00:22,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:00:22,007 INFO L276 IsEmpty]: Start isEmpty. Operand 4172 states and 17473 transitions. [2022-11-20 19:00:22,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 19:00:22,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:00:22,007 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:00:22,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-20 19:00:22,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-20 19:00:22,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2022-11-20 19:00:22,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 19:00:22,609 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 19:00:22,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:00:22,610 INFO L85 PathProgramCache]: Analyzing trace with hash -470546783, now seen corresponding path program 1 times [2022-11-20 19:00:22,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:00:22,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [812508612] [2022-11-20 19:00:22,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:00:22,610 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:00:22,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:00:22,611 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:00:22,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-20 19:00:22,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:00:22,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 19:00:22,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:00:22,953 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2022-11-20 19:00:22,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 55 [2022-11-20 19:00:23,007 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 19:00:23,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 19:00:23,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:00:23,039 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:00:23,039 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:00:23,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [812508612] [2022-11-20 19:00:23,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [812508612] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:00:23,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:00:23,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 19:00:23,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799185068] [2022-11-20 19:00:23,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:00:23,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:00:23,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:00:23,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:00:23,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:00:23,041 INFO L87 Difference]: Start difference. First operand 4172 states and 17473 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:00:23,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:00:23,276 INFO L93 Difference]: Finished difference Result 3979 states and 16684 transitions. [2022-11-20 19:00:23,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:00:23,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 19:00:23,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:00:23,288 INFO L225 Difference]: With dead ends: 3979 [2022-11-20 19:00:23,289 INFO L226 Difference]: Without dead ends: 3979 [2022-11-20 19:00:23,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:00:23,289 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 40 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:00:23,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 6 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:00:23,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3979 states. [2022-11-20 19:00:23,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3979 to 3979. [2022-11-20 19:00:23,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3979 states, 3906 states have (on average 4.271377368151562) internal successors, (16684), 3978 states have internal predecessors, (16684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:00:23,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3979 states to 3979 states and 16684 transitions. [2022-11-20 19:00:23,403 INFO L78 Accepts]: Start accepts. Automaton has 3979 states and 16684 transitions. Word has length 9 [2022-11-20 19:00:23,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:00:23,403 INFO L495 AbstractCegarLoop]: Abstraction has 3979 states and 16684 transitions. [2022-11-20 19:00:23,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:00:23,403 INFO L276 IsEmpty]: Start isEmpty. Operand 3979 states and 16684 transitions. [2022-11-20 19:00:23,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 19:00:23,404 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:00:23,404 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:00:23,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-20 19:00:23,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:00:23,615 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 19:00:23,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:00:23,615 INFO L85 PathProgramCache]: Analyzing trace with hash -470546781, now seen corresponding path program 1 times [2022-11-20 19:00:23,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:00:23,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [896961774] [2022-11-20 19:00:23,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:00:23,616 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:00:23,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:00:23,616 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:00:23,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-20 19:00:23,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:00:23,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 19:00:23,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:00:23,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:00:23,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:00:23,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:00:23,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:00:24,069 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 19:00:24,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-20 19:00:24,080 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 22 treesize of output 20 [2022-11-20 19:00:24,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:00:24,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 19:00:24,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:00:24,290 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:00:24,290 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:00:24,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [896961774] [2022-11-20 19:00:24,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [896961774] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:00:24,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:00:24,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 19:00:24,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831467891] [2022-11-20 19:00:24,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:00:24,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:00:24,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:00:24,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:00:24,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 19:00:24,292 INFO L87 Difference]: Start difference. First operand 3979 states and 16684 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:00:24,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:00:24,606 INFO L93 Difference]: Finished difference Result 3971 states and 16664 transitions. [2022-11-20 19:00:24,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 19:00:24,607 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 19:00:24,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:00:24,623 INFO L225 Difference]: With dead ends: 3971 [2022-11-20 19:00:24,623 INFO L226 Difference]: Without dead ends: 3971 [2022-11-20 19:00:24,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 19:00:24,625 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:00:24,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 18 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 43 Unchecked, 0.2s Time] [2022-11-20 19:00:24,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3971 states. [2022-11-20 19:00:24,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3971 to 3971. [2022-11-20 19:00:24,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3971 states, 3898 states have (on average 4.275012827090816) internal successors, (16664), 3970 states have internal predecessors, (16664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:00:24,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3971 states to 3971 states and 16664 transitions. [2022-11-20 19:00:24,730 INFO L78 Accepts]: Start accepts. Automaton has 3971 states and 16664 transitions. Word has length 9 [2022-11-20 19:00:24,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:00:24,731 INFO L495 AbstractCegarLoop]: Abstraction has 3971 states and 16664 transitions. [2022-11-20 19:00:24,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:00:24,731 INFO L276 IsEmpty]: Start isEmpty. Operand 3971 states and 16664 transitions. [2022-11-20 19:00:24,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 19:00:24,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:00:24,732 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:00:24,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-20 19:00:24,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:00:24,945 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 19:00:24,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:00:24,945 INFO L85 PathProgramCache]: Analyzing trace with hash -470776296, now seen corresponding path program 1 times [2022-11-20 19:00:24,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:00:24,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1823072574] [2022-11-20 19:00:24,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:00:24,946 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:00:24,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:00:24,947 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:00:24,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-20 19:00:25,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:00:25,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 19:00:25,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:00:25,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:00:25,336 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-20 19:00:25,337 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 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-20 19:00:26,094 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-20 19:00:26,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-20 19:00:26,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:00:26,534 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:00:26,534 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:00:26,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1823072574] [2022-11-20 19:00:26,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1823072574] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:00:26,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:00:26,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 19:00:26,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566117220] [2022-11-20 19:00:26,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:00:26,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:00:26,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:00:26,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:00:26,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:00:26,535 INFO L87 Difference]: Start difference. First operand 3971 states and 16664 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:00:26,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:00:26,718 INFO L93 Difference]: Finished difference Result 3971 states and 16662 transitions. [2022-11-20 19:00:26,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:00:26,719 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 19:00:26,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:00:26,730 INFO L225 Difference]: With dead ends: 3971 [2022-11-20 19:00:26,730 INFO L226 Difference]: Without dead ends: 3971 [2022-11-20 19:00:26,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:00:26,731 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:00:26,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 41 Unchecked, 0.2s Time] [2022-11-20 19:00:26,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3971 states. [2022-11-20 19:00:26,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3971 to 3971. [2022-11-20 19:00:26,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3971 states, 3898 states have (on average 4.2744997434581835) internal successors, (16662), 3970 states have internal predecessors, (16662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:00:26,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3971 states to 3971 states and 16662 transitions. [2022-11-20 19:00:26,804 INFO L78 Accepts]: Start accepts. Automaton has 3971 states and 16662 transitions. Word has length 9 [2022-11-20 19:00:26,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:00:26,805 INFO L495 AbstractCegarLoop]: Abstraction has 3971 states and 16662 transitions. [2022-11-20 19:00:26,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:00:26,805 INFO L276 IsEmpty]: Start isEmpty. Operand 3971 states and 16662 transitions. [2022-11-20 19:00:26,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 19:00:26,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:00:26,805 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:00:26,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-20 19:00:27,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:00:27,007 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 19:00:27,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:00:27,007 INFO L85 PathProgramCache]: Analyzing trace with hash -653631838, now seen corresponding path program 1 times [2022-11-20 19:00:27,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:00:27,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [785152607] [2022-11-20 19:00:27,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:00:27,008 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:00:27,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:00:27,009 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:00:27,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-20 19:00:27,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:00:27,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 19:00:27,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:00:27,471 INFO L321 Elim1Store]: treesize reduction 178, result has 20.2 percent of original size [2022-11-20 19:00:27,472 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 7 case distinctions, treesize of input 49 treesize of output 78 [2022-11-20 19:00:27,840 INFO L321 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2022-11-20 19:00:27,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 68 [2022-11-20 19:00:28,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 19:00:28,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:00:28,428 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:00:28,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [785152607] [2022-11-20 19:00:28,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [785152607] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:00:28,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:00:28,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 19:00:28,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102327239] [2022-11-20 19:00:28,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:00:28,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 19:00:28,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:00:28,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 19:00:28,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 19:00:28,430 INFO L87 Difference]: Start difference. First operand 3971 states and 16662 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:00:28,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:00:28,659 INFO L93 Difference]: Finished difference Result 3969 states and 16655 transitions. [2022-11-20 19:00:28,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 19:00:28,659 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 19:00:28,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:00:28,670 INFO L225 Difference]: With dead ends: 3969 [2022-11-20 19:00:28,670 INFO L226 Difference]: Without dead ends: 3969 [2022-11-20 19:00:28,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 19:00:28,671 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:00:28,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 74 Unchecked, 0.2s Time] [2022-11-20 19:00:28,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3969 states. [2022-11-20 19:00:28,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3969 to 3969. [2022-11-20 19:00:28,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3969 states, 3896 states have (on average 4.274897330595483) internal successors, (16655), 3968 states have internal predecessors, (16655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:00:28,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3969 states to 3969 states and 16655 transitions. [2022-11-20 19:00:28,741 INFO L78 Accepts]: Start accepts. Automaton has 3969 states and 16655 transitions. Word has length 9 [2022-11-20 19:00:28,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:00:28,742 INFO L495 AbstractCegarLoop]: Abstraction has 3969 states and 16655 transitions. [2022-11-20 19:00:28,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:00:28,742 INFO L276 IsEmpty]: Start isEmpty. Operand 3969 states and 16655 transitions. [2022-11-20 19:00:28,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 19:00:28,743 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:00:28,743 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:00:28,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-20 19:00:28,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:00:28,947 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 19:00:28,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:00:28,947 INFO L85 PathProgramCache]: Analyzing trace with hash -653631212, now seen corresponding path program 1 times [2022-11-20 19:00:28,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:00:28,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [255713435] [2022-11-20 19:00:28,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:00:28,948 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:00:28,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:00:28,955 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:00:28,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-20 19:00:29,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:00:29,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 19:00:29,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:00:29,606 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 19:00:29,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 19:00:29,949 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-20 19:00:29,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-20 19:00:30,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:00:30,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 19:00:30,232 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 19:00:30,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 19:00:30,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:00:30,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:00:32,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:00:32,033 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:00:32,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [255713435] [2022-11-20 19:00:32,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [255713435] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:00:32,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [338609196] [2022-11-20 19:00:32,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:00:32,034 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:00:32,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:00:32,043 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:00:32,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-11-20 19:00:32,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:00:32,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 19:00:32,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:00:32,824 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 19:00:32,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 19:00:33,167 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-20 19:00:33,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-20 19:00:33,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:00:33,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 19:00:33,423 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 19:00:33,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 19:00:33,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:00:33,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:00:42,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:00:42,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [338609196] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:00:42,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473431437] [2022-11-20 19:00:42,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:00:42,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:00:42,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:00:42,203 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:00:42,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-20 19:00:42,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:00:42,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 19:00:42,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:00:42,718 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 19:00:42,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 19:00:42,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:00:42,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 19:00:42,872 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 19:00:42,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 19:00:42,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:00:42,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:00:44,387 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:00:44,388 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 65 treesize of output 89 [2022-11-20 19:00:49,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:00:49,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473431437] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:00:49,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 19:00:49,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 12 [2022-11-20 19:00:49,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872642794] [2022-11-20 19:00:49,993 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 19:00:49,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 19:00:49,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:00:49,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 19:00:49,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=123, Unknown=4, NotChecked=0, Total=182 [2022-11-20 19:00:49,994 INFO L87 Difference]: Start difference. First operand 3969 states and 16655 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:00:50,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:00:50,303 INFO L93 Difference]: Finished difference Result 4008 states and 16732 transitions. [2022-11-20 19:00:50,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 19:00:50,304 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 19:00:50,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:00:50,316 INFO L225 Difference]: With dead ends: 4008 [2022-11-20 19:00:50,316 INFO L226 Difference]: Without dead ends: 4008 [2022-11-20 19:00:50,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=55, Invalid=123, Unknown=4, NotChecked=0, Total=182 [2022-11-20 19:00:50,316 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 19:00:50,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 47 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 163 Unchecked, 0.3s Time] [2022-11-20 19:00:50,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4008 states. [2022-11-20 19:00:50,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4008 to 3996. [2022-11-20 19:00:50,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3996 states, 3923 states have (on average 4.25975019118022) internal successors, (16711), 3995 states have internal predecessors, (16711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:00:50,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3996 states to 3996 states and 16711 transitions. [2022-11-20 19:00:50,421 INFO L78 Accepts]: Start accepts. Automaton has 3996 states and 16711 transitions. Word has length 9 [2022-11-20 19:00:50,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:00:50,422 INFO L495 AbstractCegarLoop]: Abstraction has 3996 states and 16711 transitions. [2022-11-20 19:00:50,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:00:50,422 INFO L276 IsEmpty]: Start isEmpty. Operand 3996 states and 16711 transitions. [2022-11-20 19:00:50,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 19:00:50,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:00:50,423 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:00:50,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 19:00:50,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2022-11-20 19:00:50,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-20 19:00:51,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -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_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:00:51,036 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 19:00:51,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:00:51,036 INFO L85 PathProgramCache]: Analyzing trace with hash -653387039, now seen corresponding path program 1 times [2022-11-20 19:00:51,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:00:51,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1370782858] [2022-11-20 19:00:51,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:00:51,037 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:00:51,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:00:51,038 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:00:51,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-20 19:00:51,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:00:51,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 19:00:51,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:00:51,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:00:51,494 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-20 19:00:51,495 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 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-20 19:00:51,625 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 19:00:51,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 19:00:51,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 19:00:51,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:00:51,704 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:00:51,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1370782858] [2022-11-20 19:00:51,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1370782858] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:00:51,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:00:51,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 19:00:51,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019814776] [2022-11-20 19:00:51,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:00:51,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:00:51,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:00:51,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:00:51,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:00:51,705 INFO L87 Difference]: Start difference. First operand 3996 states and 16711 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:00:51,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:00:51,849 INFO L93 Difference]: Finished difference Result 4000 states and 16725 transitions. [2022-11-20 19:00:51,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:00:51,850 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 19:00:51,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:00:51,861 INFO L225 Difference]: With dead ends: 4000 [2022-11-20 19:00:51,861 INFO L226 Difference]: Without dead ends: 4000 [2022-11-20 19:00:51,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:00:51,862 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:00:51,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-11-20 19:00:51,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4000 states. [2022-11-20 19:00:51,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4000 to 4000. [2022-11-20 19:00:51,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4000 states, 3927 states have (on average 4.258976317799847) internal successors, (16725), 3999 states have internal predecessors, (16725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:00:51,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4000 states to 4000 states and 16725 transitions. [2022-11-20 19:00:51,935 INFO L78 Accepts]: Start accepts. Automaton has 4000 states and 16725 transitions. Word has length 9 [2022-11-20 19:00:51,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:00:51,935 INFO L495 AbstractCegarLoop]: Abstraction has 4000 states and 16725 transitions. [2022-11-20 19:00:51,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:00:51,935 INFO L276 IsEmpty]: Start isEmpty. Operand 4000 states and 16725 transitions. [2022-11-20 19:00:51,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 19:00:51,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:00:51,935 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:00:51,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-20 19:00:52,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:00:52,136 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 19:00:52,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:00:52,136 INFO L85 PathProgramCache]: Analyzing trace with hash 465484406, now seen corresponding path program 1 times [2022-11-20 19:00:52,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:00:52,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1683342063] [2022-11-20 19:00:52,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:00:52,137 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:00:52,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:00:52,138 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:00:52,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-20 19:00:52,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:00:52,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 19:00:52,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:00:52,570 INFO L321 Elim1Store]: treesize reduction 178, result has 20.2 percent of original size [2022-11-20 19:00:52,571 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 7 case distinctions, treesize of input 49 treesize of output 78 [2022-11-20 19:00:53,193 INFO L321 Elim1Store]: treesize reduction 54, result has 32.5 percent of original size [2022-11-20 19:00:53,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 52 [2022-11-20 19:00:53,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:00:53,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:00:53,765 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:00:53,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1683342063] [2022-11-20 19:00:53,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1683342063] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:00:53,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:00:53,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 19:00:53,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84820736] [2022-11-20 19:00:53,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:00:53,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 19:00:53,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:00:53,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 19:00:53,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 19:00:53,767 INFO L87 Difference]: Start difference. First operand 4000 states and 16725 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:00:53,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:00:53,953 INFO L93 Difference]: Finished difference Result 4002 states and 16725 transitions. [2022-11-20 19:00:53,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 19:00:53,953 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 19:00:53,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:00:53,965 INFO L225 Difference]: With dead ends: 4002 [2022-11-20 19:00:53,965 INFO L226 Difference]: Without dead ends: 4002 [2022-11-20 19:00:53,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 19:00:53,966 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:00:53,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 18 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 80 Unchecked, 0.2s Time] [2022-11-20 19:00:53,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4002 states. [2022-11-20 19:00:54,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4002 to 4001. [2022-11-20 19:00:54,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4001 states, 3928 states have (on average 4.257892057026477) internal successors, (16725), 4000 states have internal predecessors, (16725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:00:54,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4001 states to 4001 states and 16725 transitions. [2022-11-20 19:00:54,040 INFO L78 Accepts]: Start accepts. Automaton has 4001 states and 16725 transitions. Word has length 9 [2022-11-20 19:00:54,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:00:54,041 INFO L495 AbstractCegarLoop]: Abstraction has 4001 states and 16725 transitions. [2022-11-20 19:00:54,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:00:54,041 INFO L276 IsEmpty]: Start isEmpty. Operand 4001 states and 16725 transitions. [2022-11-20 19:00:54,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 19:00:54,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:00:54,041 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:00:54,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-20 19:00:54,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:00:54,242 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 19:00:54,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:00:54,242 INFO L85 PathProgramCache]: Analyzing trace with hash 465503167, now seen corresponding path program 1 times [2022-11-20 19:00:54,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:00:54,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [854780218] [2022-11-20 19:00:54,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:00:54,243 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:00:54,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:00:54,244 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:00:54,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-20 19:00:54,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:00:54,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 19:00:54,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:00:54,812 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 19:00:54,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 19:00:55,164 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-20 19:00:55,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-20 19:00:55,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:00:55,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 19:00:55,422 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 19:00:55,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 19:00:55,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:00:55,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:01:01,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:01:01,294 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:01:01,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [854780218] [2022-11-20 19:01:01,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [854780218] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:01:01,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1409956194] [2022-11-20 19:01:01,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:01:01,294 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:01:01,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:01:01,296 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:01:01,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-11-20 19:01:01,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:01:01,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 19:01:01,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:01:02,113 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 19:01:02,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 19:01:02,478 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-20 19:01:02,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-20 19:01:02,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:01:02,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 19:01:02,745 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 19:01:02,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 19:01:02,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:01:02,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:01:08,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:01:08,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1409956194] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:01:08,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192459906] [2022-11-20 19:01:08,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:01:08,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:01:08,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:01:08,145 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:01:08,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-20 19:01:08,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:01:08,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 19:01:08,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:01:08,651 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 19:01:08,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 19:01:08,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:01:08,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 19:01:08,845 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 19:01:08,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 19:01:08,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:01:08,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:01:10,118 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:01:10,118 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 65 treesize of output 89 [2022-11-20 19:01:12,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:01:12,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192459906] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:01:12,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 19:01:12,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 11 [2022-11-20 19:01:12,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801570069] [2022-11-20 19:01:12,972 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 19:01:12,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 19:01:12,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:01:12,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 19:01:12,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=106, Unknown=2, NotChecked=0, Total=156 [2022-11-20 19:01:12,973 INFO L87 Difference]: Start difference. First operand 4001 states and 16725 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:01:13,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:01:13,299 INFO L93 Difference]: Finished difference Result 4036 states and 16816 transitions. [2022-11-20 19:01:13,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 19:01:13,300 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 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 9 [2022-11-20 19:01:13,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:01:13,311 INFO L225 Difference]: With dead ends: 4036 [2022-11-20 19:01:13,311 INFO L226 Difference]: Without dead ends: 4036 [2022-11-20 19:01:13,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=48, Invalid=106, Unknown=2, NotChecked=0, Total=156 [2022-11-20 19:01:13,312 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 8 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 19:01:13,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 52 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 173 Unchecked, 0.3s Time] [2022-11-20 19:01:13,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4036 states. [2022-11-20 19:01:13,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4036 to 4009. [2022-11-20 19:01:13,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4009 states, 3936 states have (on average 4.256351626016261) internal successors, (16753), 4008 states have internal predecessors, (16753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:01:13,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4009 states to 4009 states and 16753 transitions. [2022-11-20 19:01:13,386 INFO L78 Accepts]: Start accepts. Automaton has 4009 states and 16753 transitions. Word has length 9 [2022-11-20 19:01:13,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:01:13,386 INFO L495 AbstractCegarLoop]: Abstraction has 4009 states and 16753 transitions. [2022-11-20 19:01:13,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:01:13,386 INFO L276 IsEmpty]: Start isEmpty. Operand 4009 states and 16753 transitions. [2022-11-20 19:01:13,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 19:01:13,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:01:13,387 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-20 19:01:13,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2022-11-20 19:01:13,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-20 19:01:13,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-11-20 19:01:13,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:01:13,992 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 19:01:13,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:01:13,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1015064349, now seen corresponding path program 2 times [2022-11-20 19:01:13,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:01:13,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [741106757] [2022-11-20 19:01:13,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 19:01:13,993 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:01:13,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:01:13,994 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:01:13,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-20 19:01:14,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 19:01:14,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:01:14,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 19:01:14,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:01:14,547 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 19:01:14,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 19:01:14,905 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-20 19:01:14,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-20 19:01:15,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:01:15,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 19:01:15,074 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 19:01:15,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 19:01:15,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:01:15,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:01:15,148 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:01:15,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [741106757] [2022-11-20 19:01:15,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [741106757] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:01:15,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:01:15,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 19:01:15,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905307637] [2022-11-20 19:01:15,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:01:15,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:01:15,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:01:15,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:01:15,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 19:01:15,150 INFO L87 Difference]: Start difference. First operand 4009 states and 16753 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:01:15,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:01:15,520 INFO L93 Difference]: Finished difference Result 2936 states and 11599 transitions. [2022-11-20 19:01:15,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 19:01:15,521 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 19:01:15,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:01:15,529 INFO L225 Difference]: With dead ends: 2936 [2022-11-20 19:01:15,529 INFO L226 Difference]: Without dead ends: 2936 [2022-11-20 19:01:15,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 19:01:15,529 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 40 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 19:01:15,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 12 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 19:01:15,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2936 states. [2022-11-20 19:01:15,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2936 to 2876. [2022-11-20 19:01:15,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2876 states, 2842 states have (on average 4.033427163969036) internal successors, (11463), 2875 states have internal predecessors, (11463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:01:15,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2876 states to 2876 states and 11463 transitions. [2022-11-20 19:01:15,578 INFO L78 Accepts]: Start accepts. Automaton has 2876 states and 11463 transitions. Word has length 9 [2022-11-20 19:01:15,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:01:15,578 INFO L495 AbstractCegarLoop]: Abstraction has 2876 states and 11463 transitions. [2022-11-20 19:01:15,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:01:15,578 INFO L276 IsEmpty]: Start isEmpty. Operand 2876 states and 11463 transitions. [2022-11-20 19:01:15,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 19:01:15,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:01:15,579 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1, 1] [2022-11-20 19:01:15,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-11-20 19:01:15,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:01:15,781 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 19:01:15,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:01:15,781 INFO L85 PathProgramCache]: Analyzing trace with hash 671252670, now seen corresponding path program 1 times [2022-11-20 19:01:15,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:01:15,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1250713774] [2022-11-20 19:01:15,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:01:15,782 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:01:15,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:01:15,783 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:01:15,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-20 19:01:16,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:01:16,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 19:01:16,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:01:16,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:01:16,539 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:01:16,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:01:19,064 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:01:19,064 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:01:19,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1250713774] [2022-11-20 19:01:19,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1250713774] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:01:19,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [418082301] [2022-11-20 19:01:19,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:01:19,065 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:01:19,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:01:19,066 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:01:19,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-11-20 19:01:19,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:01:19,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 19:01:19,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:01:19,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:01:20,205 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:01:20,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:01:22,900 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:01:22,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [418082301] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:01:22,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387814970] [2022-11-20 19:01:22,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:01:22,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:01:22,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:01:22,902 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:01:22,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-11-20 19:01:23,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:01:23,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 19:01:23,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:01:23,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:01:23,720 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:01:23,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:01:24,334 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:01:24,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387814970] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:01:24,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 19:01:24,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 36 [2022-11-20 19:01:24,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505583050] [2022-11-20 19:01:24,335 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 19:01:24,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-20 19:01:24,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:01:24,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-20 19:01:24,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=934, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 19:01:24,337 INFO L87 Difference]: Start difference. First operand 2876 states and 11463 transitions. Second operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 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) [2022-11-20 19:01:30,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:01:32,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:01:34,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:01:36,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:01:38,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:01:40,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:01:42,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:01:44,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:01:46,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:01:48,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:01:49,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:01:51,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:01:53,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:01:58,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:02:00,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:02:01,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:02:26,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:02:26,333 INFO L93 Difference]: Finished difference Result 30758 states and 127051 transitions. [2022-11-20 19:02:26,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 19:02:26,335 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 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 10 [2022-11-20 19:02:26,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:02:26,457 INFO L225 Difference]: With dead ends: 30758 [2022-11-20 19:02:26,458 INFO L226 Difference]: Without dead ends: 30758 [2022-11-20 19:02:26,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=910, Invalid=1742, Unknown=0, NotChecked=0, Total=2652 [2022-11-20 19:02:26,459 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 5213 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 3971 mSolverCounterSat, 250 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5213 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 4232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 3971 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:02:26,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5213 Valid, 635 Invalid, 4232 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [250 Valid, 3971 Invalid, 11 Unknown, 0 Unchecked, 49.2s Time] [2022-11-20 19:02:26,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30758 states. [2022-11-20 19:02:26,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30758 to 2889. [2022-11-20 19:02:26,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2889 states, 2855 states have (on average 4.023467600700525) internal successors, (11487), 2888 states have internal predecessors, (11487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:02:26,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2889 states to 2889 states and 11487 transitions. [2022-11-20 19:02:26,734 INFO L78 Accepts]: Start accepts. Automaton has 2889 states and 11487 transitions. Word has length 10 [2022-11-20 19:02:26,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:02:26,735 INFO L495 AbstractCegarLoop]: Abstraction has 2889 states and 11487 transitions. [2022-11-20 19:02:26,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 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) [2022-11-20 19:02:26,735 INFO L276 IsEmpty]: Start isEmpty. Operand 2889 states and 11487 transitions. [2022-11-20 19:02:26,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 19:02:26,736 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:02:26,736 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:02:26,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-11-20 19:02:26,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-20 19:02:27,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (56)] Forceful destruction successful, exit code 0 [2022-11-20 19:02:27,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 19:02:27,337 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 19:02:27,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:02:27,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1899157158, now seen corresponding path program 1 times [2022-11-20 19:02:27,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:02:27,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [336705652] [2022-11-20 19:02:27,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:02:27,338 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:02:27,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:02:27,339 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:02:27,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-20 19:02:27,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:02:27,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 19:02:27,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:02:27,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:02:27,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:02:27,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:02:27,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:02:27,830 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 19:02:27,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-20 19:02:27,841 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 22 treesize of output 20 [2022-11-20 19:02:27,905 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 19:02:27,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 19:02:28,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:02:28,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:02:28,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:02:28,815 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:02:28,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [336705652] [2022-11-20 19:02:28,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [336705652] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:02:28,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1171589751] [2022-11-20 19:02:28,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:02:28,816 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:02:28,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:02:28,817 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:02:28,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2022-11-20 19:02:29,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:02:29,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 19:02:29,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:02:29,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:02:29,551 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-20 19:02:29,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 56 [2022-11-20 19:02:29,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:02:29,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 19:02:29,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:02:29,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:02:29,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1171589751] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:02:29,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 19:02:29,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3, 4] total 9 [2022-11-20 19:02:29,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539627992] [2022-11-20 19:02:29,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:02:29,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:02:29,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:02:29,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:02:29,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2022-11-20 19:02:29,851 INFO L87 Difference]: Start difference. First operand 2889 states and 11487 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:02:30,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:02:30,098 INFO L93 Difference]: Finished difference Result 2762 states and 10997 transitions. [2022-11-20 19:02:30,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:02:30,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 19:02:30,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:02:30,106 INFO L225 Difference]: With dead ends: 2762 [2022-11-20 19:02:30,106 INFO L226 Difference]: Without dead ends: 2762 [2022-11-20 19:02:30,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2022-11-20 19:02:30,107 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 77 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:02:30,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 6 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 1 Unchecked, 0.2s Time] [2022-11-20 19:02:30,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2762 states. [2022-11-20 19:02:30,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2762 to 2758. [2022-11-20 19:02:30,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2758 states, 2730 states have (on average 4.020879120879121) internal successors, (10977), 2757 states have internal predecessors, (10977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:02:30,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2758 states to 2758 states and 10977 transitions. [2022-11-20 19:02:30,154 INFO L78 Accepts]: Start accepts. Automaton has 2758 states and 10977 transitions. Word has length 10 [2022-11-20 19:02:30,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:02:30,154 INFO L495 AbstractCegarLoop]: Abstraction has 2758 states and 10977 transitions. [2022-11-20 19:02:30,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:02:30,155 INFO L276 IsEmpty]: Start isEmpty. Operand 2758 states and 10977 transitions. [2022-11-20 19:02:30,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 19:02:30,155 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:02:30,155 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:02:30,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2022-11-20 19:02:30,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (59)] Forceful destruction successful, exit code 0 [2022-11-20 19:02:30,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 19:02:30,556 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 19:02:30,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:02:30,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1899158490, now seen corresponding path program 1 times [2022-11-20 19:02:30,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:02:30,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1187757797] [2022-11-20 19:02:30,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:02:30,557 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:02:30,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:02:30,558 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:02:30,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-20 19:02:30,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:02:30,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 19:02:30,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:02:30,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:02:31,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:02:31,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:02:32,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:02:32,359 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:02:32,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1187757797] [2022-11-20 19:02:32,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1187757797] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:02:32,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1096482220] [2022-11-20 19:02:32,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:02:32,359 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:02:32,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:02:32,360 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:02:32,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2022-11-20 19:02:32,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:02:32,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 19:02:32,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:02:32,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:02:33,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:02:33,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:02:33,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:02:33,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1096482220] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:02:33,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131585687] [2022-11-20 19:02:33,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:02:33,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:02:33,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:02:33,503 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:02:33,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-11-20 19:02:33,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:02:33,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 19:02:33,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:02:33,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:02:33,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:02:33,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:02:34,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:02:34,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131585687] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:02:34,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 19:02:34,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 9 [2022-11-20 19:02:34,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761187994] [2022-11-20 19:02:34,368 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 19:02:34,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 19:02:34,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:02:34,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 19:02:34,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-20 19:02:34,369 INFO L87 Difference]: Start difference. First operand 2758 states and 10977 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:02:36,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:02:36,426 INFO L93 Difference]: Finished difference Result 2800 states and 11101 transitions. [2022-11-20 19:02:36,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 19:02:36,427 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 19:02:36,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:02:36,434 INFO L225 Difference]: With dead ends: 2800 [2022-11-20 19:02:36,434 INFO L226 Difference]: Without dead ends: 2800 [2022-11-20 19:02:36,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-11-20 19:02:36,435 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 14 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 19:02:36,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 52 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 131 Invalid, 0 Unknown, 110 Unchecked, 0.5s Time] [2022-11-20 19:02:36,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2800 states. [2022-11-20 19:02:36,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2800 to 2796. [2022-11-20 19:02:36,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2796 states, 2768 states have (on average 4.006502890173411) internal successors, (11090), 2795 states have internal predecessors, (11090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:02:36,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2796 states to 2796 states and 11090 transitions. [2022-11-20 19:02:36,484 INFO L78 Accepts]: Start accepts. Automaton has 2796 states and 11090 transitions. Word has length 10 [2022-11-20 19:02:36,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:02:36,484 INFO L495 AbstractCegarLoop]: Abstraction has 2796 states and 11090 transitions. [2022-11-20 19:02:36,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:02:36,484 INFO L276 IsEmpty]: Start isEmpty. Operand 2796 states and 11090 transitions. [2022-11-20 19:02:36,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 19:02:36,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:02:36,485 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:02:36,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-11-20 19:02:36,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2022-11-20 19:02:36,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (61)] Forceful destruction successful, exit code 0 [2022-11-20 19:02:37,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 19:02:37,086 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 19:02:37,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:02:37,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1899386673, now seen corresponding path program 1 times [2022-11-20 19:02:37,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:02:37,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [295028019] [2022-11-20 19:02:37,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:02:37,087 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:02:37,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:02:37,088 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:02:37,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-20 19:02:37,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:02:37,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 19:02:37,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:02:37,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:02:37,547 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-20 19:02:37,547 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 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-20 19:02:37,668 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 19:02:37,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 19:02:37,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:02:37,801 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:02:37,801 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:02:37,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [295028019] [2022-11-20 19:02:37,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [295028019] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:02:37,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:02:37,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 19:02:37,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629034125] [2022-11-20 19:02:37,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:02:37,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:02:37,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:02:37,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:02:37,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:02:37,803 INFO L87 Difference]: Start difference. First operand 2796 states and 11090 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:02:37,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:02:37,945 INFO L93 Difference]: Finished difference Result 2798 states and 11093 transitions. [2022-11-20 19:02:37,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:02:37,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 19:02:37,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:02:37,953 INFO L225 Difference]: With dead ends: 2798 [2022-11-20 19:02:37,953 INFO L226 Difference]: Without dead ends: 2798 [2022-11-20 19:02:37,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:02:37,953 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:02:37,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-11-20 19:02:37,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2798 states. [2022-11-20 19:02:37,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2798 to 2798. [2022-11-20 19:02:37,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2798 states, 2770 states have (on average 4.004693140794224) internal successors, (11093), 2797 states have internal predecessors, (11093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:02:37,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2798 states to 2798 states and 11093 transitions. [2022-11-20 19:02:37,999 INFO L78 Accepts]: Start accepts. Automaton has 2798 states and 11093 transitions. Word has length 10 [2022-11-20 19:02:37,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:02:37,999 INFO L495 AbstractCegarLoop]: Abstraction has 2798 states and 11093 transitions. [2022-11-20 19:02:38,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:02:38,000 INFO L276 IsEmpty]: Start isEmpty. Operand 2798 states and 11093 transitions. [2022-11-20 19:02:38,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 19:02:38,000 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:02:38,000 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:02:38,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2022-11-20 19:02:38,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:02:38,203 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 19:02:38,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:02:38,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1899387045, now seen corresponding path program 1 times [2022-11-20 19:02:38,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:02:38,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1384647580] [2022-11-20 19:02:38,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:02:38,204 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:02:38,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:02:38,205 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:02:38,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-20 19:02:38,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:02:38,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 19:02:38,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:02:38,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:02:38,690 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-20 19:02:38,690 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 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-20 19:02:39,549 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-20 19:02:39,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-20 19:02:40,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:02:40,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:02:40,213 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:02:40,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1384647580] [2022-11-20 19:02:40,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1384647580] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:02:40,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:02:40,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 19:02:40,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388772337] [2022-11-20 19:02:40,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:02:40,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:02:40,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:02:40,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:02:40,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:02:40,214 INFO L87 Difference]: Start difference. First operand 2798 states and 11093 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:02:40,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:02:40,349 INFO L93 Difference]: Finished difference Result 2794 states and 11075 transitions. [2022-11-20 19:02:40,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:02:40,350 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 19:02:40,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:02:40,357 INFO L225 Difference]: With dead ends: 2794 [2022-11-20 19:02:40,357 INFO L226 Difference]: Without dead ends: 2794 [2022-11-20 19:02:40,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:02:40,357 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:02:40,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-11-20 19:02:40,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2794 states. [2022-11-20 19:02:40,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2794 to 2794. [2022-11-20 19:02:40,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2794 states, 2766 states have (on average 4.003976861894432) internal successors, (11075), 2793 states have internal predecessors, (11075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:02:40,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2794 states to 2794 states and 11075 transitions. [2022-11-20 19:02:40,403 INFO L78 Accepts]: Start accepts. Automaton has 2794 states and 11075 transitions. Word has length 10 [2022-11-20 19:02:40,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:02:40,403 INFO L495 AbstractCegarLoop]: Abstraction has 2794 states and 11075 transitions. [2022-11-20 19:02:40,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:02:40,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2794 states and 11075 transitions. [2022-11-20 19:02:40,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 19:02:40,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:02:40,403 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:02:40,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2022-11-20 19:02:40,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:02:40,604 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 19:02:40,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:02:40,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1212249859, now seen corresponding path program 1 times [2022-11-20 19:02:40,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:02:40,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1593663866] [2022-11-20 19:02:40,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:02:40,605 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:02:40,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:02:40,606 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:02:40,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-20 19:02:40,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:02:40,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 19:02:40,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:02:41,141 INFO L321 Elim1Store]: treesize reduction 178, result has 20.2 percent of original size [2022-11-20 19:02:41,141 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 7 case distinctions, treesize of input 49 treesize of output 78 [2022-11-20 19:02:41,775 INFO L321 Elim1Store]: treesize reduction 54, result has 32.5 percent of original size [2022-11-20 19:02:41,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 52 [2022-11-20 19:02:42,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 19:02:42,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:02:42,429 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:02:42,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1593663866] [2022-11-20 19:02:42,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1593663866] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:02:42,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:02:42,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 19:02:42,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556407690] [2022-11-20 19:02:42,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:02:42,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 19:02:42,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:02:42,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 19:02:42,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 19:02:42,430 INFO L87 Difference]: Start difference. First operand 2794 states and 11075 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:02:42,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:02:42,573 INFO L93 Difference]: Finished difference Result 2793 states and 11074 transitions. [2022-11-20 19:02:42,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 19:02:42,574 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 19:02:42,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:02:42,581 INFO L225 Difference]: With dead ends: 2793 [2022-11-20 19:02:42,581 INFO L226 Difference]: Without dead ends: 2793 [2022-11-20 19:02:42,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 19:02:42,581 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:02:42,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 63 Unchecked, 0.1s Time] [2022-11-20 19:02:42,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2793 states. [2022-11-20 19:02:42,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2793 to 2793. [2022-11-20 19:02:42,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2793 states, 2766 states have (on average 4.003615328994939) internal successors, (11074), 2792 states have internal predecessors, (11074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:02:42,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2793 states to 2793 states and 11074 transitions. [2022-11-20 19:02:42,631 INFO L78 Accepts]: Start accepts. Automaton has 2793 states and 11074 transitions. Word has length 10 [2022-11-20 19:02:42,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:02:42,632 INFO L495 AbstractCegarLoop]: Abstraction has 2793 states and 11074 transitions. [2022-11-20 19:02:42,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:02:42,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2793 states and 11074 transitions. [2022-11-20 19:02:42,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 19:02:42,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:02:42,633 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:02:42,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2022-11-20 19:02:42,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:02:42,834 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 19:02:42,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:02:42,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1545133027, now seen corresponding path program 1 times [2022-11-20 19:02:42,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:02:42,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [558512279] [2022-11-20 19:02:42,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:02:42,835 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:02:42,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:02:42,836 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:02:42,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-20 19:02:43,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:02:43,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 19:02:43,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:02:43,308 INFO L321 Elim1Store]: treesize reduction 168, result has 21.1 percent of original size [2022-11-20 19:02:43,308 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 5 case distinctions, treesize of input 36 treesize of output 67 [2022-11-20 19:02:43,419 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 19:02:43,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-20 19:02:43,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:02:43,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:02:43,550 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:02:43,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [558512279] [2022-11-20 19:02:43,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [558512279] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:02:43,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:02:43,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 19:02:43,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389606999] [2022-11-20 19:02:43,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:02:43,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 19:02:43,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:02:43,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 19:02:43,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 19:02:43,551 INFO L87 Difference]: Start difference. First operand 2793 states and 11074 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:02:43,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:02:43,756 INFO L93 Difference]: Finished difference Result 2741 states and 10916 transitions. [2022-11-20 19:02:43,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:02:43,756 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 19:02:43,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:02:43,763 INFO L225 Difference]: With dead ends: 2741 [2022-11-20 19:02:43,764 INFO L226 Difference]: Without dead ends: 2741 [2022-11-20 19:02:43,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 19:02:43,764 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 77 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:02:43,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 6 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:02:43,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2741 states. [2022-11-20 19:02:43,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2741 to 2727. [2022-11-20 19:02:43,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2727 states, 2706 states have (on average 4.017738359201774) internal successors, (10872), 2726 states have internal predecessors, (10872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:02:43,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2727 states to 2727 states and 10872 transitions. [2022-11-20 19:02:43,846 INFO L78 Accepts]: Start accepts. Automaton has 2727 states and 10872 transitions. Word has length 10 [2022-11-20 19:02:43,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:02:43,846 INFO L495 AbstractCegarLoop]: Abstraction has 2727 states and 10872 transitions. [2022-11-20 19:02:43,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:02:43,846 INFO L276 IsEmpty]: Start isEmpty. Operand 2727 states and 10872 transitions. [2022-11-20 19:02:43,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 19:02:43,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:02:43,847 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:02:43,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2022-11-20 19:02:44,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:02:44,048 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 19:02:44,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:02:44,049 INFO L85 PathProgramCache]: Analyzing trace with hash 498006114, now seen corresponding path program 2 times [2022-11-20 19:02:44,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:02:44,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1519477533] [2022-11-20 19:02:44,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 19:02:44,050 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:02:44,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:02:44,051 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:02:44,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-20 19:02:44,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 19:02:44,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:02:44,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 19:02:44,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:02:44,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:02:44,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:02:44,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:02:44,467 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:02:44,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1519477533] [2022-11-20 19:02:44,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1519477533] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:02:44,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:02:44,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 19:02:44,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745401881] [2022-11-20 19:02:44,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:02:44,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:02:44,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:02:44,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:02:44,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 19:02:44,468 INFO L87 Difference]: Start difference. First operand 2727 states and 10872 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:02:44,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:02:44,768 INFO L93 Difference]: Finished difference Result 2037 states and 7916 transitions. [2022-11-20 19:02:44,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 19:02:44,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 19:02:44,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:02:44,773 INFO L225 Difference]: With dead ends: 2037 [2022-11-20 19:02:44,773 INFO L226 Difference]: Without dead ends: 1971 [2022-11-20 19:02:44,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 19:02:44,774 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 62 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 19:02:44,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 6 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 19:02:44,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2022-11-20 19:02:44,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1915. [2022-11-20 19:02:44,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1909 states have (on average 3.92352016762703) internal successors, (7490), 1914 states have internal predecessors, (7490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:02:44,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 7490 transitions. [2022-11-20 19:02:44,806 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 7490 transitions. Word has length 11 [2022-11-20 19:02:44,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:02:44,807 INFO L495 AbstractCegarLoop]: Abstraction has 1915 states and 7490 transitions. [2022-11-20 19:02:44,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:02:44,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 7490 transitions. [2022-11-20 19:02:44,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 19:02:44,808 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:02:44,808 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:02:44,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Forceful destruction successful, exit code 0 [2022-11-20 19:02:45,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:02:45,008 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 19:02:45,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:02:45,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1223861033, now seen corresponding path program 1 times [2022-11-20 19:02:45,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:02:45,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1154284936] [2022-11-20 19:02:45,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:02:45,009 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:02:45,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:02:45,011 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:02:45,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-20 19:02:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:02:45,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 19:02:45,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:02:45,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:02:45,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:02:45,297 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:02:45,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1154284936] [2022-11-20 19:02:45,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1154284936] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:02:45,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:02:45,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 19:02:45,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568137412] [2022-11-20 19:02:45,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:02:45,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:02:45,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:02:45,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:02:45,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:02:45,298 INFO L87 Difference]: Start difference. First operand 1915 states and 7490 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:02:45,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:02:45,482 INFO L93 Difference]: Finished difference Result 1475 states and 5478 transitions. [2022-11-20 19:02:45,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:02:45,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 19:02:45,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:02:45,485 INFO L225 Difference]: With dead ends: 1475 [2022-11-20 19:02:45,485 INFO L226 Difference]: Without dead ends: 1249 [2022-11-20 19:02:45,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:02:45,486 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 28 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:02:45,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 6 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:02:45,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2022-11-20 19:02:45,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 1249. [2022-11-20 19:02:45,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1245 states have (on average 3.870682730923695) internal successors, (4819), 1248 states have internal predecessors, (4819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:02:45,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 4819 transitions. [2022-11-20 19:02:45,505 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 4819 transitions. Word has length 11 [2022-11-20 19:02:45,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:02:45,505 INFO L495 AbstractCegarLoop]: Abstraction has 1249 states and 4819 transitions. [2022-11-20 19:02:45,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:02:45,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 4819 transitions. [2022-11-20 19:02:45,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 19:02:45,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:02:45,506 INFO L195 NwaCegarLoop]: trace histogram [11, 1, 1] [2022-11-20 19:02:45,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Forceful destruction successful, exit code 0 [2022-11-20 19:02:45,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:02:45,711 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 19:02:45,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:02:45,711 INFO L85 PathProgramCache]: Analyzing trace with hash 966756849, now seen corresponding path program 3 times [2022-11-20 19:02:45,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:02:45,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2035963062] [2022-11-20 19:02:45,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 19:02:45,712 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:02:45,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:02:45,712 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:02:45,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-20 19:02:46,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-20 19:02:46,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:02:46,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 19:02:46,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:02:46,460 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 19:02:46,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 19:02:47,348 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:02:47,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:02:52,206 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:02:52,206 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:02:52,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2035963062] [2022-11-20 19:02:52,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2035963062] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:02:52,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [757637539] [2022-11-20 19:02:52,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 19:02:52,207 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:02:52,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:02:52,208 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:02:52,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2022-11-20 19:02:53,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-20 19:02:53,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:02:53,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 19:02:53,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:02:54,115 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 19:02:54,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 19:02:54,619 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:02:54,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:03:01,463 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:03:01,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [757637539] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:03:01,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271965699] [2022-11-20 19:03:01,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 19:03:01,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:03:01,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:03:01,465 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:03:01,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-11-20 19:03:06,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-20 19:03:06,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:03:06,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 19:03:06,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:03:07,056 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 19:03:07,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 19:03:07,601 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:03:07,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:03:15,243 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:03:15,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271965699] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:03:15,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 19:03:15,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 51 [2022-11-20 19:03:15,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637534334] [2022-11-20 19:03:15,244 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 19:03:15,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-20 19:03:15,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:03:15,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-20 19:03:15,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=712, Invalid=2044, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 19:03:15,246 INFO L87 Difference]: Start difference. First operand 1249 states and 4819 transitions. Second operand has 53 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 52 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:03:31,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:03:33,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:03:35,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:03:37,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:03:39,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:03:41,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:03:43,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:03:45,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:03:47,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:03:49,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:03:51,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:03:53,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:03:55,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:03:57,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:03:59,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:04:01,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:04:03,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:04:05,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:04:07,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:04:09,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:04:11,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:04:13,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:04:15,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:04:17,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:04:19,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:04:21,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:04:23,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:04:25,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:04:27,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:04:34,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:04:35,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:04:41,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:04:43,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:05:11,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:05:11,729 INFO L93 Difference]: Finished difference Result 11805 states and 48337 transitions. [2022-11-20 19:05:11,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-20 19:05:11,732 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 52 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 19:05:11,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:05:11,771 INFO L225 Difference]: With dead ends: 11805 [2022-11-20 19:05:11,771 INFO L226 Difference]: Without dead ends: 11805 [2022-11-20 19:05:11,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 43.9s TimeCoverageRelationStatistics Valid=1281, Invalid=3141, Unknown=0, NotChecked=0, Total=4422 [2022-11-20 19:05:11,772 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 5692 mSDsluCounter, 1241 mSDsCounter, 0 mSdLazyCounter, 6358 mSolverCounterSat, 761 mSolverCounterUnsat, 27 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 88.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5692 SdHoareTripleChecker+Valid, 1312 SdHoareTripleChecker+Invalid, 7146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 761 IncrementalHoareTripleChecker+Valid, 6358 IncrementalHoareTripleChecker+Invalid, 27 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 90.9s IncrementalHoareTripleChecker+Time [2022-11-20 19:05:11,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5692 Valid, 1312 Invalid, 7146 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [761 Valid, 6358 Invalid, 27 Unknown, 0 Unchecked, 90.9s Time] [2022-11-20 19:05:11,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11805 states. [2022-11-20 19:05:11,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11805 to 1264. [2022-11-20 19:05:11,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 1260 states have (on average 3.8476190476190477) internal successors, (4848), 1263 states have internal predecessors, (4848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:05:11,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 4848 transitions. [2022-11-20 19:05:11,875 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 4848 transitions. Word has length 13 [2022-11-20 19:05:11,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:05:11,875 INFO L495 AbstractCegarLoop]: Abstraction has 1264 states and 4848 transitions. [2022-11-20 19:05:11,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 52 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:05:11,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 4848 transitions. [2022-11-20 19:05:11,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 19:05:11,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:05:11,878 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:05:11,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (70)] Forceful destruction successful, exit code 0 [2022-11-20 19:05:12,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-11-20 19:05:12,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-11-20 19:05:12,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:05:12,486 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 19:05:12,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:05:12,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1436974887, now seen corresponding path program 1 times [2022-11-20 19:05:12,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:05:12,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [317788754] [2022-11-20 19:05:12,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:05:12,488 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:05:12,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:05:12,489 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:05:12,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-20 19:05:12,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:05:12,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 19:05:12,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:05:12,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 19:05:12,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:05:12,803 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:05:12,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [317788754] [2022-11-20 19:05:12,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [317788754] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:05:12,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:05:12,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 19:05:12,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513970100] [2022-11-20 19:05:12,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:05:12,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:05:12,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:05:12,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:05:12,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:05:12,805 INFO L87 Difference]: Start difference. First operand 1264 states and 4848 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:05:13,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:05:13,007 INFO L93 Difference]: Finished difference Result 1184 states and 4544 transitions. [2022-11-20 19:05:13,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:05:13,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 19:05:13,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:05:13,011 INFO L225 Difference]: With dead ends: 1184 [2022-11-20 19:05:13,011 INFO L226 Difference]: Without dead ends: 1184 [2022-11-20 19:05:13,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:05:13,011 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:05:13,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 6 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:05:13,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2022-11-20 19:05:13,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 1184. [2022-11-20 19:05:13,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1181 states have (on average 3.8475867908552073) internal successors, (4544), 1183 states have internal predecessors, (4544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:05:13,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 4544 transitions. [2022-11-20 19:05:13,029 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 4544 transitions. Word has length 17 [2022-11-20 19:05:13,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:05:13,029 INFO L495 AbstractCegarLoop]: Abstraction has 1184 states and 4544 transitions. [2022-11-20 19:05:13,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:05:13,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 4544 transitions. [2022-11-20 19:05:13,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 19:05:13,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:05:13,032 INFO L195 NwaCegarLoop]: trace histogram [17, 1, 1, 1] [2022-11-20 19:05:13,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Forceful destruction successful, exit code 0 [2022-11-20 19:05:13,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:05:13,245 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 19:05:13,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:05:13,245 INFO L85 PathProgramCache]: Analyzing trace with hash 766986846, now seen corresponding path program 2 times [2022-11-20 19:05:13,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:05:13,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [767025646] [2022-11-20 19:05:13,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 19:05:13,245 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:05:13,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:05:13,246 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:05:13,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-20 19:05:13,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 19:05:13,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:05:13,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 19:05:13,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:05:13,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:05:15,123 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:05:15,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:05:23,575 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:05:23,575 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:05:23,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [767025646] [2022-11-20 19:05:23,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [767025646] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:05:23,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2043788626] [2022-11-20 19:05:23,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 19:05:23,575 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:05:23,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:05:23,576 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:05:23,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (74)] Waiting until timeout for monitored process [2022-11-20 19:05:24,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 19:05:24,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:05:24,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 19:05:24,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:05:24,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:05:24,825 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:05:24,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:05:25,624 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:05:25,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2043788626] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:05:25,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456888597] [2022-11-20 19:05:25,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 19:05:25,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:05:25,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:05:25,633 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:05:25,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-11-20 19:05:26,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 19:05:26,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:05:26,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 19:05:26,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:05:26,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 19:05:26,457 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:05:26,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:05:27,283 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:05:27,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456888597] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:05:27,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 19:05:27,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19, 19, 19, 19] total 37 [2022-11-20 19:05:27,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736805079] [2022-11-20 19:05:27,284 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 19:05:27,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-20 19:05:27,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:05:27,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-20 19:05:27,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=1009, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 19:05:27,285 INFO L87 Difference]: Start difference. First operand 1184 states and 4544 transitions. Second operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 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) [2022-11-20 19:05:52,039 WARN L233 SmtUtils]: Spent 11.48s on a formula simplification that was a NOOP. DAG size: 199 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:05:55,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:05:57,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:05:59,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:06:01,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:06:03,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:06:05,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:06:07,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:06:09,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:06:11,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:06:13,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:06:15,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:06:17,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:06:19,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:06:21,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:06:23,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:06:25,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:06:27,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:06:35,630 WARN L233 SmtUtils]: Spent 7.14s on a formula simplification that was a NOOP. DAG size: 188 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:06:43,738 WARN L233 SmtUtils]: Spent 5.92s on a formula simplification that was a NOOP. DAG size: 178 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:06:52,615 WARN L233 SmtUtils]: Spent 6.80s on a formula simplification that was a NOOP. DAG size: 167 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:07:01,904 WARN L233 SmtUtils]: Spent 7.30s on a formula simplification that was a NOOP. DAG size: 156 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:07:55,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:07:55,849 INFO L93 Difference]: Finished difference Result 23408 states and 96483 transitions. [2022-11-20 19:07:55,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-20 19:07:55,851 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 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 20 [2022-11-20 19:07:55,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:07:55,937 INFO L225 Difference]: With dead ends: 23408 [2022-11-20 19:07:55,938 INFO L226 Difference]: Without dead ends: 23408 [2022-11-20 19:07:55,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 80.0s TimeCoverageRelationStatistics Valid=1043, Invalid=1927, Unknown=0, NotChecked=0, Total=2970 [2022-11-20 19:07:55,940 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 10612 mSDsluCounter, 1921 mSDsCounter, 0 mSdLazyCounter, 9557 mSolverCounterSat, 549 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 72.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10612 SdHoareTripleChecker+Valid, 2028 SdHoareTripleChecker+Invalid, 10123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 549 IncrementalHoareTripleChecker+Valid, 9557 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 76.9s IncrementalHoareTripleChecker+Time [2022-11-20 19:07:55,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10612 Valid, 2028 Invalid, 10123 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [549 Valid, 9557 Invalid, 17 Unknown, 0 Unchecked, 76.9s Time] [2022-11-20 19:07:55,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23408 states. [2022-11-20 19:07:56,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23408 to 1222. [2022-11-20 19:07:56,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1219 states have (on average 3.774405250205086) internal successors, (4601), 1221 states have internal predecessors, (4601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:07:56,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 4601 transitions. [2022-11-20 19:07:56,152 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 4601 transitions. Word has length 20 [2022-11-20 19:07:56,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:07:56,152 INFO L495 AbstractCegarLoop]: Abstraction has 1222 states and 4601 transitions. [2022-11-20 19:07:56,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 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) [2022-11-20 19:07:56,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 4601 transitions. [2022-11-20 19:07:56,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 19:07:56,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:07:56,156 INFO L195 NwaCegarLoop]: trace histogram [24, 1, 1] [2022-11-20 19:07:56,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Ended with exit code 0 [2022-11-20 19:07:56,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (74)] Ended with exit code 0 [2022-11-20 19:07:56,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-11-20 19:07:56,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:07:56,763 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 19:07:56,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:07:56,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1011404445, now seen corresponding path program 4 times [2022-11-20 19:07:56,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:07:56,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [510592594] [2022-11-20 19:07:56,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 19:07:56,764 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 [2022-11-20 19:07:56,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:07:56,765 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 19:07:56,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-20 19:07:57,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 19:07:57,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:07:57,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 19:07:57,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:07:57,417 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 19:07:57,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 19:08:00,125 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:08:00,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:08:17,908 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:08:17,908 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:08:17,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [510592594] [2022-11-20 19:08:17,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [510592594] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:08:17,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1508588562] [2022-11-20 19:08:17,908 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 19:08:17,908 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:08:17,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:08:17,909 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:08:17,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (77)] Waiting until timeout for monitored process [2022-11-20 19:08:18,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 19:08:18,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:08:18,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 19:08:18,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:08:18,987 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 19:08:18,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 19:08:22,541 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:08:22,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:08:25,311 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:08:25,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1508588562] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:08:25,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847601988] [2022-11-20 19:08:25,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 19:08:25,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:08:25,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:08:25,313 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:08:25,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0cfb1d65-f743-4f18-a823-f85999a068c4/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-11-20 19:08:25,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 19:08:25,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:08:25,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 19:08:25,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:08:26,030 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 19:08:26,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 19:08:27,168 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:08:27,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:08:28,659 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:08:28,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847601988] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:08:28,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 19:08:28,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 25, 25, 25] total 66 [2022-11-20 19:08:28,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077226302] [2022-11-20 19:08:28,659 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 19:08:28,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-20 19:08:28,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:08:28,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-20 19:08:28,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=3367, Unknown=0, NotChecked=0, Total=4556 [2022-11-20 19:08:28,661 INFO L87 Difference]: Start difference. First operand 1222 states and 4601 transitions. Second operand has 68 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:09:29,888 WARN L233 SmtUtils]: Spent 22.62s on a formula simplification that was a NOOP. DAG size: 275 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:09:52,844 WARN L233 SmtUtils]: Spent 18.58s on a formula simplification that was a NOOP. DAG size: 265 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:09:54,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:09:56,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:09:58,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:10:00,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:10:02,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:10:04,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:10:06,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:10:08,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:10:10,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:10:12,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:10:14,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:10:16,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:10:18,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:10:20,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:10:23,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:10:25,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:10:27,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:10:29,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:10:31,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:10:33,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:10:35,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:10:37,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:10:39,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:10:41,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 19:11:08,872 WARN L233 SmtUtils]: Spent 23.44s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:11:32,589 WARN L233 SmtUtils]: Spent 19.49s on a formula simplification that was a NOOP. DAG size: 243 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:11:55,232 WARN L233 SmtUtils]: Spent 16.45s on a formula simplification that was a NOOP. DAG size: 232 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)