./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/java_BubbleSort-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5e519f3a 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_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/java_BubbleSort-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI --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 ba885d2ca843c278430bc3d4272c307ea7df8f1fbcd0da84e81382a8c1939a93 --- 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-5e519f3 [2022-11-03 03:55:50,768 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:55:50,772 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:55:50,835 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:55:50,836 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:55:50,841 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:55:50,843 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:55:50,850 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:55:50,852 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:55:50,859 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:55:50,860 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:55:50,863 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:55:50,864 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:55:50,867 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:55:50,869 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:55:50,871 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:55:50,873 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:55:50,874 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:55:50,876 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:55:50,885 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:55:50,887 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:55:50,888 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:55:50,893 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:55:50,894 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:55:50,904 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:55:50,905 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:55:50,905 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:55:50,908 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:55:50,908 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:55:50,910 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:55:50,910 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:55:50,911 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:55:50,914 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:55:50,915 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:55:50,916 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:55:50,917 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:55:50,918 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:55:50,918 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:55:50,918 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:55:50,919 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:55:50,920 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:55:50,921 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-03 03:55:50,972 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:55:50,972 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:55:50,973 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:55:50,973 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:55:50,974 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:55:50,975 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:55:50,975 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:55:50,975 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:55:50,976 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:55:50,976 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:55:50,977 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:55:50,978 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:55:50,978 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:55:50,978 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:55:50,978 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:55:50,979 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:55:50,979 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:55:50,979 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:55:50,980 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-03 03:55:50,980 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-03 03:55:50,981 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:55:50,981 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:55:50,981 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-03 03:55:50,982 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:55:50,982 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:55:50,982 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:55:50,982 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-03 03:55:50,983 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-03 03:55:50,983 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-03 03:55:50,983 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:55:50,984 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 03:55:50,984 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:55:50,984 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:55:50,985 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:55:50,985 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:55:50,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:55:50,986 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:55:50,986 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:55:50,990 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:55:50,991 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:55:50,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:55:50,991 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:55:50,991 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_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ba885d2ca843c278430bc3d4272c307ea7df8f1fbcd0da84e81382a8c1939a93 [2022-11-03 03:55:51,370 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:55:51,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:55:51,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:55:51,403 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:55:51,404 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:55:51,406 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-memsafety/java_BubbleSort-alloca-1.i [2022-11-03 03:55:51,501 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/data/ba323242e/c5c5c746622547968951d42c01bab38e/FLAGa793a4265 [2022-11-03 03:55:52,092 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:55:52,093 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/sv-benchmarks/c/array-memsafety/java_BubbleSort-alloca-1.i [2022-11-03 03:55:52,107 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/data/ba323242e/c5c5c746622547968951d42c01bab38e/FLAGa793a4265 [2022-11-03 03:55:52,406 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/data/ba323242e/c5c5c746622547968951d42c01bab38e [2022-11-03 03:55:52,409 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:55:52,411 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:55:52,423 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:55:52,424 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:55:52,433 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:55:52,434 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:55:52" (1/1) ... [2022-11-03 03:55:52,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56bdae4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:52, skipping insertion in model container [2022-11-03 03:55:52,440 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:55:52" (1/1) ... [2022-11-03 03:55:52,449 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:55:52,501 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:55:52,858 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:55:52,870 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) [2022-11-03 03:55:52,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7c7ff687 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:52, skipping insertion in model container [2022-11-03 03:55:52,871 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:55:52,872 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-03 03:55:52,874 INFO L158 Benchmark]: Toolchain (without parser) took 461.93ms. Allocated memory is still 109.1MB. Free memory was 66.9MB in the beginning and 81.6MB in the end (delta: -14.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 03:55:52,875 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 109.1MB. Free memory is still 84.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:55:52,876 INFO L158 Benchmark]: CACSL2BoogieTranslator took 448.49ms. Allocated memory is still 109.1MB. Free memory was 66.7MB in the beginning and 81.6MB in the end (delta: -14.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 03:55:52,877 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 109.1MB. Free memory is still 84.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 448.49ms. Allocated memory is still 109.1MB. Free memory was 66.7MB in the beginning and 81.6MB in the end (delta: -14.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 526]: 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_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/java_BubbleSort-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI --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 ba885d2ca843c278430bc3d4272c307ea7df8f1fbcd0da84e81382a8c1939a93 --- 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-5e519f3 [2022-11-03 03:55:55,371 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:55:55,375 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:55:55,421 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:55:55,422 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:55:55,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:55:55,431 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:55:55,437 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:55:55,445 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:55:55,451 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:55:55,453 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:55:55,455 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:55:55,456 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:55:55,459 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:55:55,462 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:55:55,464 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:55:55,466 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:55:55,467 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:55:55,472 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:55:55,474 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:55:55,476 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:55:55,484 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:55:55,485 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:55:55,487 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:55:55,492 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:55:55,498 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:55:55,498 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:55:55,500 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:55:55,501 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:55:55,503 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:55:55,504 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:55:55,505 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:55:55,507 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:55:55,509 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:55:55,510 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:55:55,510 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:55:55,511 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:55:55,512 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:55:55,512 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:55:55,515 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:55:55,516 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:55:55,519 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-03 03:55:55,583 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:55:55,583 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:55:55,585 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:55:55,585 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:55:55,587 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:55:55,587 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:55:55,587 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:55:55,587 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:55:55,588 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:55:55,588 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:55:55,589 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:55:55,590 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:55:55,591 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-03 03:55:55,592 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-03 03:55:55,592 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:55:55,592 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:55:55,593 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-03 03:55:55,593 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:55:55,593 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:55:55,593 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:55:55,594 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-03 03:55:55,594 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-03 03:55:55,594 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-03 03:55:55,595 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:55:55,595 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 03:55:55,595 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 03:55:55,595 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 03:55:55,596 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:55:55,596 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:55:55,596 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:55:55,596 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 03:55:55,597 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:55:55,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:55:55,598 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:55:55,598 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:55:55,598 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 03:55:55,599 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 03:55:55,599 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:55:55,599 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 03:55:55,600 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_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ba885d2ca843c278430bc3d4272c307ea7df8f1fbcd0da84e81382a8c1939a93 [2022-11-03 03:55:56,053 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:55:56,080 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:55:56,084 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:55:56,086 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:55:56,091 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:55:56,093 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-memsafety/java_BubbleSort-alloca-1.i [2022-11-03 03:55:56,185 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/data/89b4d5543/bd3e41788d0e4389932658e166499f9f/FLAG9987a5ba2 [2022-11-03 03:55:56,843 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:55:56,850 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/sv-benchmarks/c/array-memsafety/java_BubbleSort-alloca-1.i [2022-11-03 03:55:56,873 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/data/89b4d5543/bd3e41788d0e4389932658e166499f9f/FLAG9987a5ba2 [2022-11-03 03:55:57,104 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/data/89b4d5543/bd3e41788d0e4389932658e166499f9f [2022-11-03 03:55:57,107 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:55:57,108 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:55:57,110 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:55:57,114 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:55:57,130 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:55:57,132 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:55:57" (1/1) ... [2022-11-03 03:55:57,133 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@416da266 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:57, skipping insertion in model container [2022-11-03 03:55:57,134 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:55:57" (1/1) ... [2022-11-03 03:55:57,143 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:55:57,181 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:55:57,613 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:55:57,629 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-03 03:55:57,652 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:55:57,694 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:55:57,699 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:55:57,774 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:55:57,819 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:55:57,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:57 WrapperNode [2022-11-03 03:55:57,821 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:55:57,823 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:55:57,823 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:55:57,823 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:55:57,832 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:57" (1/1) ... [2022-11-03 03:55:57,874 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:57" (1/1) ... [2022-11-03 03:55:57,899 INFO L138 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 63 [2022-11-03 03:55:57,899 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:55:57,900 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:55:57,901 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:55:57,901 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:55:57,912 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:57" (1/1) ... [2022-11-03 03:55:57,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:57" (1/1) ... [2022-11-03 03:55:57,916 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:57" (1/1) ... [2022-11-03 03:55:57,916 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:57" (1/1) ... [2022-11-03 03:55:57,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:57" (1/1) ... [2022-11-03 03:55:57,930 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:57" (1/1) ... [2022-11-03 03:55:57,932 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:57" (1/1) ... [2022-11-03 03:55:57,934 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:57" (1/1) ... [2022-11-03 03:55:57,937 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:55:57,938 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:55:57,938 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:55:57,938 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:55:57,939 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:57" (1/1) ... [2022-11-03 03:55:57,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:55:57,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:55:57,975 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:55:58,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:55:58,041 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-03 03:55:58,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 03:55:58,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 03:55:58,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-03 03:55:58,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:55:58,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:55:58,175 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:55:58,178 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:55:58,825 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:55:58,832 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:55:58,832 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-03 03:55:58,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:55:58 BoogieIcfgContainer [2022-11-03 03:55:58,835 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:55:58,838 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:55:58,838 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:55:58,842 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:55:58,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:55:57" (1/3) ... [2022-11-03 03:55:58,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1df356da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:55:58, skipping insertion in model container [2022-11-03 03:55:58,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:57" (2/3) ... [2022-11-03 03:55:58,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1df356da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:55:58, skipping insertion in model container [2022-11-03 03:55:58,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:55:58" (3/3) ... [2022-11-03 03:55:58,847 INFO L112 eAbstractionObserver]: Analyzing ICFG java_BubbleSort-alloca-1.i [2022-11-03 03:55:58,870 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:55:58,871 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-11-03 03:55:58,964 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:55:58,974 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;@57079da7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:55:58,975 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2022-11-03 03:55:58,980 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 25 states have (on average 1.92) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:55:58,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-03 03:55:58,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:55:58,993 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-03 03:55:58,995 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-03 03:55:59,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:55:59,005 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2022-11-03 03:55:59,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:55:59,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [220994529] [2022-11-03 03:55:59,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:55:59,023 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:55:59,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:55:59,030 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:55:59,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 03:55:59,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:55:59,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:55:59,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:55:59,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 03:55:59,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:55:59,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:55:59,344 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:55:59,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [220994529] [2022-11-03 03:55:59,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [220994529] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:55:59,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:55:59,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:55:59,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837716899] [2022-11-03 03:55:59,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:55:59,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:55:59,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:55:59,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:55:59,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:55:59,397 INFO L87 Difference]: Start difference. First operand has 41 states, 25 states have (on average 1.92) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) 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) [2022-11-03 03:55:59,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:55:59,545 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-11-03 03:55:59,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:55:59,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) 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 [2022-11-03 03:55:59,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:55:59,558 INFO L225 Difference]: With dead ends: 40 [2022-11-03 03:55:59,559 INFO L226 Difference]: Without dead ends: 38 [2022-11-03 03:55:59,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:55:59,564 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 34 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:55:59,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 31 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:55:59,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-03 03:55:59,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-11-03 03:55:59,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.75) 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) [2022-11-03 03:55:59,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-11-03 03:55:59,617 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 6 [2022-11-03 03:55:59,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:55:59,617 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-11-03 03:55:59,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) 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) [2022-11-03 03:55:59,618 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-11-03 03:55:59,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-03 03:55:59,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:55:59,619 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-03 03:55:59,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-03 03:55:59,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:55:59,823 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-03 03:55:59,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:55:59,824 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2022-11-03 03:55:59,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:55:59,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1545771579] [2022-11-03 03:55:59,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:55:59,825 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:55:59,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:55:59,826 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:55:59,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 03:55:59,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:55:59,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:55:59,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:55:59,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 03:56:00,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:00,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:00,055 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:00,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1545771579] [2022-11-03 03:56:00,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1545771579] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:00,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:00,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:56:00,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943001958] [2022-11-03 03:56:00,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:00,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:56:00,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:00,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:56:00,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:56:00,067 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:00,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:00,565 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2022-11-03 03:56:00,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:56:00,571 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-03 03:56:00,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:00,572 INFO L225 Difference]: With dead ends: 77 [2022-11-03 03:56:00,572 INFO L226 Difference]: Without dead ends: 77 [2022-11-03 03:56:00,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:56:00,574 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 43 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:00,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 145 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:56:00,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-03 03:56:00,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 41. [2022-11-03 03:56:00,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:00,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-11-03 03:56:00,584 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 6 [2022-11-03 03:56:00,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:00,584 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-11-03 03:56:00,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:00,585 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-11-03 03:56:00,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-03 03:56:00,586 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:00,586 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-03 03:56:00,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:00,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:00,795 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-03 03:56:00,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:00,796 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2022-11-03 03:56:00,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:00,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2051900118] [2022-11-03 03:56:00,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:00,797 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:00,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:00,799 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:00,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 03:56:00,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:00,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 03:56:00,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:00,952 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 03:56:01,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:01,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:01,040 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:01,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2051900118] [2022-11-03 03:56:01,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2051900118] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:01,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:01,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:56:01,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720476700] [2022-11-03 03:56:01,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:01,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:56:01,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:01,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:56:01,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:56:01,045 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:01,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:01,109 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-11-03 03:56:01,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:56:01,115 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-03 03:56:01,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:01,116 INFO L225 Difference]: With dead ends: 43 [2022-11-03 03:56:01,116 INFO L226 Difference]: Without dead ends: 43 [2022-11-03 03:56:01,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:56:01,118 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 1 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:01,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 94 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2022-11-03 03:56:01,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-03 03:56:01,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-11-03 03:56:01,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:01,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-11-03 03:56:01,124 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 6 [2022-11-03 03:56:01,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:01,125 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-11-03 03:56:01,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:01,125 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-11-03 03:56:01,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 03:56:01,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:01,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:01,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-11-03 03:56:01,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:01,327 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-03 03:56:01,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:01,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1184052082, now seen corresponding path program 1 times [2022-11-03 03:56:01,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:01,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [718688876] [2022-11-03 03:56:01,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:01,329 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:01,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:01,336 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:01,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 03:56:01,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:01,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:56:01,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:01,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:01,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:01,469 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:01,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [718688876] [2022-11-03 03:56:01,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [718688876] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:01,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:01,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:56:01,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227580352] [2022-11-03 03:56:01,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:01,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:56:01,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:01,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:56:01,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:56:01,473 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 4 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) [2022-11-03 03:56:01,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:01,549 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2022-11-03 03:56:01,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:56:01,551 INFO L78 Accepts]: Start accepts. Automaton has has 4 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 [2022-11-03 03:56:01,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:01,552 INFO L225 Difference]: With dead ends: 44 [2022-11-03 03:56:01,552 INFO L226 Difference]: Without dead ends: 44 [2022-11-03 03:56:01,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:56:01,554 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 44 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:01,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 68 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:56:01,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-03 03:56:01,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2022-11-03 03:56:01,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:01,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-11-03 03:56:01,561 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 9 [2022-11-03 03:56:01,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:01,561 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-11-03 03:56:01,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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) [2022-11-03 03:56:01,562 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-11-03 03:56:01,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 03:56:01,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:01,563 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:01,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:01,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:01,778 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-03 03:56:01,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:01,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2022-11-03 03:56:01,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:01,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [783481674] [2022-11-03 03:56:01,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:01,780 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:01,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:01,781 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:01,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 03:56:01,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:01,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:56:01,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:01,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:01,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:02,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:02,054 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:02,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [783481674] [2022-11-03 03:56:02,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [783481674] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:02,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2012862486] [2022-11-03 03:56:02,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:02,055 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:56:02,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:56:02,058 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:56:02,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-03 03:56:02,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:02,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:56:02,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:02,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:02,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:02,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:02,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2012862486] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:02,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381756344] [2022-11-03 03:56:02,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:02,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:56:02,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:56:02,274 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:56:02,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 03:56:02,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:02,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:56:02,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:02,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:02,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:02,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:02,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381756344] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:02,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:56:02,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2022-11-03 03:56:02,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711044177] [2022-11-03 03:56:02,452 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:56:02,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:56:02,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:02,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:56:02,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:56:02,457 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2022-11-03 03:56:02,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:02,588 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2022-11-03 03:56:02,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:56:02,592 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 10 [2022-11-03 03:56:02,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:02,593 INFO L225 Difference]: With dead ends: 75 [2022-11-03 03:56:02,593 INFO L226 Difference]: Without dead ends: 75 [2022-11-03 03:56:02,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:56:02,595 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 71 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:02,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 167 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:56:02,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-03 03:56:02,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 46. [2022-11-03 03:56:02,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 32 states have (on average 1.5625) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:02,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-11-03 03:56:02,602 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 10 [2022-11-03 03:56:02,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:02,603 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-11-03 03:56:02,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2022-11-03 03:56:02,603 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-11-03 03:56:02,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 03:56:02,604 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:02,604 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:02,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:02,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:03,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:03,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:03,205 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-03 03:56:03,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:03,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2022-11-03 03:56:03,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:03,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [71269640] [2022-11-03 03:56:03,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:03,207 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:03,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:03,208 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:03,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 03:56:03,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:03,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:56:03,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:03,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 03:56:03,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:03,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:04,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:04,373 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:04,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [71269640] [2022-11-03 03:56:04,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [71269640] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:04,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1225809837] [2022-11-03 03:56:04,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:04,375 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:56:04,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:56:04,376 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:56:04,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-03 03:56:04,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:04,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:56:04,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:04,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 03:56:04,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:04,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:05,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:05,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1225809837] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:05,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411734776] [2022-11-03 03:56:05,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:05,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:56:05,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:56:05,074 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:56:05,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 03:56:05,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:05,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:56:05,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:05,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 03:56:05,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:05,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:05,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:05,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411734776] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:05,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:56:05,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 12 [2022-11-03 03:56:05,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341644748] [2022-11-03 03:56:05,588 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:56:05,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 03:56:05,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:05,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 03:56:05,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:56:05,595 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:06,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:06,593 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2022-11-03 03:56:06,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:56:06,595 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-03 03:56:06,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:06,596 INFO L225 Difference]: With dead ends: 83 [2022-11-03 03:56:06,596 INFO L226 Difference]: Without dead ends: 83 [2022-11-03 03:56:06,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-11-03 03:56:06,598 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 173 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:06,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 133 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 122 Invalid, 0 Unknown, 4 Unchecked, 0.9s Time] [2022-11-03 03:56:06,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-03 03:56:06,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2022-11-03 03:56:06,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 40 states have (on average 1.5) internal successors, (60), 53 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:06,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2022-11-03 03:56:06,605 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 10 [2022-11-03 03:56:06,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:06,606 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2022-11-03 03:56:06,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:06,607 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2022-11-03 03:56:06,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 03:56:06,607 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:06,607 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:06,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:06,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-03 03:56:07,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:07,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:56:07,224 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-03 03:56:07,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:07,225 INFO L85 PathProgramCache]: Analyzing trace with hash 363893197, now seen corresponding path program 1 times [2022-11-03 03:56:07,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:07,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [511632779] [2022-11-03 03:56:07,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:07,225 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:07,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:07,227 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:07,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 03:56:07,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:07,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:56:07,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:07,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:56:07,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:07,468 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:07,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [511632779] [2022-11-03 03:56:07,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [511632779] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:07,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:07,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:56:07,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793044272] [2022-11-03 03:56:07,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:07,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:56:07,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:07,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:56:07,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:56:07,474 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:07,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:07,551 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2022-11-03 03:56:07,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:56:07,552 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 03:56:07,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:07,554 INFO L225 Difference]: With dead ends: 61 [2022-11-03 03:56:07,554 INFO L226 Difference]: Without dead ends: 59 [2022-11-03 03:56:07,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:56:07,555 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:07,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 101 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2022-11-03 03:56:07,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-03 03:56:07,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2022-11-03 03:56:07,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 56 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:07,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2022-11-03 03:56:07,562 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 13 [2022-11-03 03:56:07,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:07,562 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2022-11-03 03:56:07,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:07,567 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2022-11-03 03:56:07,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 03:56:07,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:07,569 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:07,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-11-03 03:56:07,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:07,782 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-03 03:56:07,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:07,783 INFO L85 PathProgramCache]: Analyzing trace with hash 363893999, now seen corresponding path program 1 times [2022-11-03 03:56:07,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:07,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1967530730] [2022-11-03 03:56:07,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:07,783 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:07,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:07,785 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:07,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 03:56:07,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:07,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:56:07,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:07,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:56:07,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:07,888 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:07,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1967530730] [2022-11-03 03:56:07,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1967530730] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:07,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:07,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:56:07,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927171695] [2022-11-03 03:56:07,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:07,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:56:07,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:07,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:56:07,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:56:07,891 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:07,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:07,943 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2022-11-03 03:56:07,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:56:07,943 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 03:56:07,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:07,944 INFO L225 Difference]: With dead ends: 59 [2022-11-03 03:56:07,944 INFO L226 Difference]: Without dead ends: 51 [2022-11-03 03:56:07,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:56:07,945 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 1 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:07,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 106 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:56:07,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-03 03:56:07,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-11-03 03:56:07,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 50 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) [2022-11-03 03:56:07,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-11-03 03:56:07,951 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 13 [2022-11-03 03:56:07,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:07,951 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-11-03 03:56:07,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:07,951 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-11-03 03:56:07,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 03:56:07,952 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:07,953 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:07,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:08,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:08,154 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-03 03:56:08,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:08,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1064958577, now seen corresponding path program 1 times [2022-11-03 03:56:08,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:08,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1125543103] [2022-11-03 03:56:08,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:08,155 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:08,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:08,156 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:08,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 03:56:08,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:08,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:56:08,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:08,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 03:56:08,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:56:08,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:08,277 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:08,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1125543103] [2022-11-03 03:56:08,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1125543103] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:08,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:08,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:56:08,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045741564] [2022-11-03 03:56:08,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:08,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:56:08,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:08,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:56:08,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:56:08,280 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:08,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:08,497 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2022-11-03 03:56:08,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:56:08,497 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 03:56:08,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:08,498 INFO L225 Difference]: With dead ends: 45 [2022-11-03 03:56:08,498 INFO L226 Difference]: Without dead ends: 45 [2022-11-03 03:56:08,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:56:08,499 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 44 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:08,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 25 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:56:08,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-03 03:56:08,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-11-03 03:56:08,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:08,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-11-03 03:56:08,505 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 13 [2022-11-03 03:56:08,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:08,505 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-11-03 03:56:08,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:08,505 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-11-03 03:56:08,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 03:56:08,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:08,506 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:08,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:08,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:08,720 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-03 03:56:08,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:08,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1064958578, now seen corresponding path program 1 times [2022-11-03 03:56:08,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:08,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1215957839] [2022-11-03 03:56:08,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:08,722 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:08,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:08,723 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:08,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 03:56:08,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:08,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:56:08,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:08,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 03:56:09,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:09,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:09,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:09,737 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:09,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1215957839] [2022-11-03 03:56:09,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1215957839] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 03:56:09,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:56:09,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-11-03 03:56:09,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819038307] [2022-11-03 03:56:09,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:09,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:56:09,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:09,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:56:09,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:56:09,740 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:10,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:10,399 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2022-11-03 03:56:10,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:56:10,400 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 03:56:10,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:10,401 INFO L225 Difference]: With dead ends: 51 [2022-11-03 03:56:10,401 INFO L226 Difference]: Without dead ends: 51 [2022-11-03 03:56:10,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:56:10,403 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 75 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:10,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 43 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:56:10,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-03 03:56:10,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2022-11-03 03:56:10,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:10,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2022-11-03 03:56:10,408 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 13 [2022-11-03 03:56:10,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:10,409 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2022-11-03 03:56:10,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:10,409 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2022-11-03 03:56:10,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-03 03:56:10,410 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:10,410 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:10,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:10,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:10,630 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-03 03:56:10,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:10,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1346022463, now seen corresponding path program 1 times [2022-11-03 03:56:10,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:10,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [269403048] [2022-11-03 03:56:10,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:10,631 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:10,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:10,632 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:10,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 03:56:10,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:10,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:56:10,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:10,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 03:56:11,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:56:11,044 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:11,044 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:11,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [269403048] [2022-11-03 03:56:11,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [269403048] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:11,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:11,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:56:11,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781660777] [2022-11-03 03:56:11,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:11,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:56:11,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:11,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:56:11,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:56:11,046 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:11,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:11,385 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-11-03 03:56:11,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:56:11,387 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-03 03:56:11,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:11,387 INFO L225 Difference]: With dead ends: 49 [2022-11-03 03:56:11,387 INFO L226 Difference]: Without dead ends: 49 [2022-11-03 03:56:11,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:56:11,389 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:11,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 66 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 20 Unchecked, 0.2s Time] [2022-11-03 03:56:11,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-03 03:56:11,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-03 03:56:11,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 48 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) [2022-11-03 03:56:11,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-11-03 03:56:11,393 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 14 [2022-11-03 03:56:11,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:11,394 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-11-03 03:56:11,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:11,394 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-11-03 03:56:11,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 03:56:11,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:11,395 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:11,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:11,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:11,617 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-03 03:56:11,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:11,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1570446787, now seen corresponding path program 1 times [2022-11-03 03:56:11,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:11,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [876026731] [2022-11-03 03:56:11,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:11,618 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:11,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:11,619 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:11,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 03:56:11,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:11,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:56:11,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:11,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 03:56:12,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:56:12,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:13,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:56:13,387 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:13,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [876026731] [2022-11-03 03:56:13,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [876026731] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:13,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1274847488] [2022-11-03 03:56:13,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:13,388 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:56:13,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:56:13,391 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:56:13,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-03 03:56:13,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:13,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:56:13,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:13,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:56:13,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:14,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:56:14,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1274847488] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:14,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548793027] [2022-11-03 03:56:14,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:14,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:56:14,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:56:14,223 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:56:14,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 03:56:14,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:14,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:56:14,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:14,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 03:56:14,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:56:14,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:16,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:56:16,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548793027] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:16,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:56:16,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 6, 6, 7] total 29 [2022-11-03 03:56:16,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130039893] [2022-11-03 03:56:16,496 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:56:16,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-03 03:56:16,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:16,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-03 03:56:16,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2022-11-03 03:56:16,498 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:19,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:19,086 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2022-11-03 03:56:19,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 03:56:19,087 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have 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 [2022-11-03 03:56:19,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:19,088 INFO L225 Difference]: With dead ends: 56 [2022-11-03 03:56:19,089 INFO L226 Difference]: Without dead ends: 54 [2022-11-03 03:56:19,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=269, Invalid=1291, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 03:56:19,090 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 86 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:19,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 164 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 271 Invalid, 0 Unknown, 10 Unchecked, 1.4s Time] [2022-11-03 03:56:19,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-03 03:56:19,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2022-11-03 03:56:19,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:19,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-11-03 03:56:19,096 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 17 [2022-11-03 03:56:19,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:19,096 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-11-03 03:56:19,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6206896551724137) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:19,097 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-11-03 03:56:19,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 03:56:19,098 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:19,098 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1] [2022-11-03 03:56:19,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:19,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:19,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:19,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:19,707 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-03 03:56:19,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:19,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1817992175, now seen corresponding path program 2 times [2022-11-03 03:56:19,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:19,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [58131082] [2022-11-03 03:56:19,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:56:19,708 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:19,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:19,709 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:19,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 03:56:19,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:56:19,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:56:19,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 03:56:19,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:19,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 03:56:20,277 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:20,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:21,592 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:21,593 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:21,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [58131082] [2022-11-03 03:56:21,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [58131082] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:21,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2143954191] [2022-11-03 03:56:21,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:56:21,593 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:56:21,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:56:21,595 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:56:21,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-03 03:56:21,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:56:21,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:56:21,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:56:21,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:21,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 03:56:22,252 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:22,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:22,858 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:22,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2143954191] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:22,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437943353] [2022-11-03 03:56:22,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:56:22,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:56:22,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:56:22,863 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:56:22,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-03 03:56:22,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:56:22,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:56:22,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 03:56:22,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:22,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 03:56:23,392 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:23,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:24,977 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:24,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437943353] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:24,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:56:24,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 8, 8] total 24 [2022-11-03 03:56:24,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316406503] [2022-11-03 03:56:24,979 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:56:24,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 03:56:24,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:24,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 03:56:24,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=425, Unknown=0, NotChecked=0, Total=600 [2022-11-03 03:56:24,981 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:28,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:28,577 INFO L93 Difference]: Finished difference Result 165 states and 191 transitions. [2022-11-03 03:56:28,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 03:56:28,579 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-03 03:56:28,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:28,580 INFO L225 Difference]: With dead ends: 165 [2022-11-03 03:56:28,580 INFO L226 Difference]: Without dead ends: 165 [2022-11-03 03:56:28,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2022-11-03 03:56:28,581 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 335 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:28,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 296 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 302 Invalid, 0 Unknown, 38 Unchecked, 1.8s Time] [2022-11-03 03:56:28,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-03 03:56:28,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 61. [2022-11-03 03:56:28,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:28,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-11-03 03:56:28,588 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 18 [2022-11-03 03:56:28,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:28,588 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-11-03 03:56:28,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:28,589 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-11-03 03:56:28,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 03:56:28,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:28,590 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:28,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:28,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:29,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:29,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:56:29,205 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-03 03:56:29,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:29,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1609733735, now seen corresponding path program 1 times [2022-11-03 03:56:29,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:29,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1336929279] [2022-11-03 03:56:29,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:29,207 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:29,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:29,208 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:29,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 03:56:29,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:29,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:56:29,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:29,347 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 03:56:30,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:56:30,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:31,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:56:31,675 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:31,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1336929279] [2022-11-03 03:56:31,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1336929279] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:31,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [467029269] [2022-11-03 03:56:31,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:31,676 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:56:31,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:56:31,677 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:56:31,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-11-03 03:56:31,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:31,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:56:31,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:32,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:32,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:33,809 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:33,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [467029269] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:33,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435331922] [2022-11-03 03:56:33,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:33,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:56:33,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:56:33,815 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:56:33,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-03 03:56:33,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:33,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:56:33,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:33,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 03:56:34,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:56:34,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:34,711 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:56:34,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435331922] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:34,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:56:34,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 11, 10, 7, 6] total 29 [2022-11-03 03:56:34,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23752981] [2022-11-03 03:56:34,712 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:56:34,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-03 03:56:34,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:34,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-03 03:56:34,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-11-03 03:56:34,715 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:36,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:36,905 INFO L93 Difference]: Finished difference Result 87 states and 104 transitions. [2022-11-03 03:56:36,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 03:56:36,907 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-03 03:56:36,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:36,908 INFO L225 Difference]: With dead ends: 87 [2022-11-03 03:56:36,908 INFO L226 Difference]: Without dead ends: 87 [2022-11-03 03:56:36,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=206, Invalid=1276, Unknown=0, NotChecked=0, Total=1482 [2022-11-03 03:56:36,910 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 30 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:36,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 259 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 88 Invalid, 0 Unknown, 38 Unchecked, 0.5s Time] [2022-11-03 03:56:36,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-03 03:56:36,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 80. [2022-11-03 03:56:36,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 76 states have (on average 1.2763157894736843) internal successors, (97), 79 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:36,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 97 transitions. [2022-11-03 03:56:36,916 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 97 transitions. Word has length 22 [2022-11-03 03:56:36,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:36,917 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 97 transitions. [2022-11-03 03:56:36,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:36,917 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 97 transitions. [2022-11-03 03:56:36,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-03 03:56:36,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:36,918 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:36,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:37,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-11-03 03:56:37,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:37,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:56:37,547 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-03 03:56:37,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:37,548 INFO L85 PathProgramCache]: Analyzing trace with hash -914742659, now seen corresponding path program 1 times [2022-11-03 03:56:37,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:37,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1207821975] [2022-11-03 03:56:37,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:37,548 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:37,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:37,550 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:37,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 03:56:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:37,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:56:37,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:37,665 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 03:56:39,081 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:56:39,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:40,319 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:56:40,320 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:40,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1207821975] [2022-11-03 03:56:40,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1207821975] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:40,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1365682248] [2022-11-03 03:56:40,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:40,321 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:56:40,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:56:40,322 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:56:40,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-03 03:56:40,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:40,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:56:40,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:41,056 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:56:41,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:42,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:56:42,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1365682248] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:42,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090497509] [2022-11-03 03:56:42,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:42,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:56:42,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:56:42,202 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:56:42,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-03 03:56:42,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:42,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:56:42,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:42,333 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 03:56:42,684 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:56:42,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:43,129 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:56:43,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090497509] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:43,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:56:43,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 10, 9, 7, 6] total 27 [2022-11-03 03:56:43,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395285852] [2022-11-03 03:56:43,130 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:56:43,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-03 03:56:43,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:43,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-03 03:56:43,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-11-03 03:56:43,132 INFO L87 Difference]: Start difference. First operand 80 states and 97 transitions. Second operand has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:45,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:45,896 INFO L93 Difference]: Finished difference Result 105 states and 129 transitions. [2022-11-03 03:56:45,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-03 03:56:45,897 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-03 03:56:45,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:45,898 INFO L225 Difference]: With dead ends: 105 [2022-11-03 03:56:45,898 INFO L226 Difference]: Without dead ends: 105 [2022-11-03 03:56:45,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=246, Invalid=1476, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 03:56:45,899 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 24 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:45,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 197 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 36 Unchecked, 0.3s Time] [2022-11-03 03:56:45,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-03 03:56:45,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 84. [2022-11-03 03:56:45,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 80 states have (on average 1.275) internal successors, (102), 83 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:45,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2022-11-03 03:56:45,910 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 25 [2022-11-03 03:56:45,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:45,911 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2022-11-03 03:56:45,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:45,911 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2022-11-03 03:56:45,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-03 03:56:45,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:45,913 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:45,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:46,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-11-03 03:56:46,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:46,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:56:46,527 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-03 03:56:46,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:46,528 INFO L85 PathProgramCache]: Analyzing trace with hash -2028106434, now seen corresponding path program 1 times [2022-11-03 03:56:46,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:46,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1179757673] [2022-11-03 03:56:46,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:46,528 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:46,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:46,529 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:46,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 03:56:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:46,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:56:46,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:46,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 03:56:46,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:46,857 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:46,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1179757673] [2022-11-03 03:56:46,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1179757673] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:46,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:46,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:56:46,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807540257] [2022-11-03 03:56:46,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:46,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:56:46,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:46,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:56:46,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:56:46,859 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:46,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:46,900 INFO L93 Difference]: Finished difference Result 99 states and 120 transitions. [2022-11-03 03:56:46,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:56:46,901 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-03 03:56:46,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:46,902 INFO L225 Difference]: With dead ends: 99 [2022-11-03 03:56:46,902 INFO L226 Difference]: Without dead ends: 97 [2022-11-03 03:56:46,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:56:46,903 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:46,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 78 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 18 Unchecked, 0.0s Time] [2022-11-03 03:56:46,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-03 03:56:46,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2022-11-03 03:56:46,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 90 states have (on average 1.288888888888889) internal successors, (116), 93 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:46,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2022-11-03 03:56:46,908 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 25 [2022-11-03 03:56:46,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:46,908 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2022-11-03 03:56:46,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:46,909 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2022-11-03 03:56:46,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-03 03:56:46,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:46,910 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:46,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:47,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:56:47,124 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-03 03:56:47,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:47,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1553234866, now seen corresponding path program 1 times [2022-11-03 03:56:47,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:47,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1773296183] [2022-11-03 03:56:47,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:47,126 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:47,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:47,127 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:47,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 03:56:47,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:47,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:56:47,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:47,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 03:56:47,849 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:56:47,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:48,713 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:56:48,714 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:48,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1773296183] [2022-11-03 03:56:48,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1773296183] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:48,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [891430796] [2022-11-03 03:56:48,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:48,714 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:56:48,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:56:48,715 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:56:48,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-03 03:56:48,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:48,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:56:48,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:49,423 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:56:49,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:50,148 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:56:50,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [891430796] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:50,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285558478] [2022-11-03 03:56:50,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:50,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:56:50,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:56:50,150 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:56:50,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-03 03:56:50,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:50,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 03:56:50,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:50,253 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 03:56:50,606 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:56:50,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:52,466 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:56:52,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285558478] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:52,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:56:52,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 10, 9, 7, 7] total 32 [2022-11-03 03:56:52,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507079828] [2022-11-03 03:56:52,467 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:56:52,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-03 03:56:52,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:56:52,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-03 03:56:52,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2022-11-03 03:56:52,469 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:55,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:55,402 INFO L93 Difference]: Finished difference Result 129 states and 160 transitions. [2022-11-03 03:56:55,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-03 03:56:55,404 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-03 03:56:55,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:55,405 INFO L225 Difference]: With dead ends: 129 [2022-11-03 03:56:55,405 INFO L226 Difference]: Without dead ends: 125 [2022-11-03 03:56:55,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=265, Invalid=1627, Unknown=0, NotChecked=0, Total=1892 [2022-11-03 03:56:55,407 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 54 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:55,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 251 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 135 Invalid, 0 Unknown, 38 Unchecked, 0.7s Time] [2022-11-03 03:56:55,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-03 03:56:55,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 118. [2022-11-03 03:56:55,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 114 states have (on average 1.3245614035087718) internal successors, (151), 117 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:55,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 151 transitions. [2022-11-03 03:56:55,413 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 151 transitions. Word has length 26 [2022-11-03 03:56:55,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:55,413 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 151 transitions. [2022-11-03 03:56:55,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:56:55,414 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 151 transitions. [2022-11-03 03:56:55,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 03:56:55,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:55,415 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:55,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:55,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2022-11-03 03:56:55,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-03 03:56:56,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:56:56,030 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-03 03:56:56,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:56,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1054837879, now seen corresponding path program 1 times [2022-11-03 03:56:56,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:56:56,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [569271879] [2022-11-03 03:56:56,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:56,032 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:56:56,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:56:56,033 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:56:56,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 03:56:56,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:56,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:56:56,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:56,191 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 03:56:56,916 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:56,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:56:59,087 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:56:59,088 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:56:59,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [569271879] [2022-11-03 03:56:59,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [569271879] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:56:59,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1927259765] [2022-11-03 03:56:59,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:59,089 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:56:59,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:56:59,090 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:56:59,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-03 03:56:59,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:59,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:56:59,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:59,331 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 03:57:00,680 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:00,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:03,370 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:03,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1927259765] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:57:03,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854139759] [2022-11-03 03:57:03,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:03,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:57:03,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:57:03,372 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:57:03,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-03 03:57:03,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:03,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:57:03,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:03,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 03:57:04,988 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 03:57:04,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:09,664 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 03:57:09,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854139759] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:57:09,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:57:09,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 12, 11, 8, 9] total 47 [2022-11-03 03:57:09,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350935316] [2022-11-03 03:57:09,665 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:57:09,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-03 03:57:09,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:57:09,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-03 03:57:09,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1958, Unknown=0, NotChecked=0, Total=2256 [2022-11-03 03:57:09,667 INFO L87 Difference]: Start difference. First operand 118 states and 151 transitions. Second operand has 48 states, 47 states have (on average 2.6595744680851063) internal successors, (125), 48 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:32,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:57:38,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:38,029 INFO L93 Difference]: Finished difference Result 305 states and 362 transitions. [2022-11-03 03:57:38,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-03 03:57:38,030 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.6595744680851063) internal successors, (125), 48 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-03 03:57:38,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:38,032 INFO L225 Difference]: With dead ends: 305 [2022-11-03 03:57:38,032 INFO L226 Difference]: Without dead ends: 305 [2022-11-03 03:57:38,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 111 SyntacticMatches, 12 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2757 ImplicationChecksByTransitivity, 27.5s TimeCoverageRelationStatistics Valid=1471, Invalid=7271, Unknown=0, NotChecked=0, Total=8742 [2022-11-03 03:57:38,034 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 543 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 1071 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 1745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 580 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:38,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [543 Valid, 674 Invalid, 1745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1071 Invalid, 0 Unknown, 580 Unchecked, 9.9s Time] [2022-11-03 03:57:38,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-11-03 03:57:38,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 174. [2022-11-03 03:57:38,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 170 states have (on average 1.3) internal successors, (221), 173 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:38,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 221 transitions. [2022-11-03 03:57:38,043 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 221 transitions. Word has length 27 [2022-11-03 03:57:38,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:38,043 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 221 transitions. [2022-11-03 03:57:38,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.6595744680851063) internal successors, (125), 48 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:38,044 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 221 transitions. [2022-11-03 03:57:38,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 03:57:38,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:38,045 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:57:38,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:38,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-11-03 03:57:38,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:38,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:57:38,649 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-03 03:57:38,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:38,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1774535125, now seen corresponding path program 1 times [2022-11-03 03:57:38,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:57:38,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [961186382] [2022-11-03 03:57:38,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:38,651 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:57:38,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:57:38,652 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:57:38,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 03:57:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:38,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:57:38,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:39,019 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 03:57:39,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:57:39,020 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:57:39,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [961186382] [2022-11-03 03:57:39,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [961186382] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:57:39,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:57:39,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:57:39,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123446773] [2022-11-03 03:57:39,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:57:39,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:57:39,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:57:39,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:57:39,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:57:39,022 INFO L87 Difference]: Start difference. First operand 174 states and 221 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 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) [2022-11-03 03:57:39,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:39,030 INFO L93 Difference]: Finished difference Result 173 states and 220 transitions. [2022-11-03 03:57:39,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:57:39,031 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 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 31 [2022-11-03 03:57:39,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:39,033 INFO L225 Difference]: With dead ends: 173 [2022-11-03 03:57:39,033 INFO L226 Difference]: Without dead ends: 171 [2022-11-03 03:57:39,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:57:39,034 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 4 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:39,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 41 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 11 Unchecked, 0.0s Time] [2022-11-03 03:57:39,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-11-03 03:57:39,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-11-03 03:57:39,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 168 states have (on average 1.2857142857142858) internal successors, (216), 170 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:39,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 216 transitions. [2022-11-03 03:57:39,042 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 216 transitions. Word has length 31 [2022-11-03 03:57:39,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:39,044 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 216 transitions. [2022-11-03 03:57:39,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 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) [2022-11-03 03:57:39,045 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 216 transitions. [2022-11-03 03:57:39,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-03 03:57:39,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:39,053 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:57:39,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:39,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:57:39,267 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-03 03:57:39,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:39,267 INFO L85 PathProgramCache]: Analyzing trace with hash -823961093, now seen corresponding path program 1 times [2022-11-03 03:57:39,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:57:39,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [646433490] [2022-11-03 03:57:39,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:39,268 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:57:39,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:57:39,270 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:57:39,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-03 03:57:39,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:39,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 03:57:39,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:39,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 03:57:40,075 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:57:40,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:41,110 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:57:41,110 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:57:41,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [646433490] [2022-11-03 03:57:41,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [646433490] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:57:41,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [675939579] [2022-11-03 03:57:41,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:41,111 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:57:41,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:57:41,113 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:57:41,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-03 03:57:41,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:41,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:57:41,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:41,878 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:57:41,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:42,683 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:57:42,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [675939579] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:57:42,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395778714] [2022-11-03 03:57:42,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:42,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:57:42,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:57:42,685 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:57:42,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-03 03:57:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:42,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 03:57:42,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:42,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 03:57:43,231 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:57:43,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:45,327 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:57:45,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395778714] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:57:45,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:57:45,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 10, 9, 7, 7] total 32 [2022-11-03 03:57:45,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841481512] [2022-11-03 03:57:45,328 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:57:45,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-03 03:57:45,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:57:45,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-03 03:57:45,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2022-11-03 03:57:45,330 INFO L87 Difference]: Start difference. First operand 171 states and 216 transitions. Second operand has 32 states, 32 states have (on average 4.3125) internal successors, (138), 32 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:49,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:49,006 INFO L93 Difference]: Finished difference Result 185 states and 225 transitions. [2022-11-03 03:57:49,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-03 03:57:49,008 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.3125) internal successors, (138), 32 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-03 03:57:49,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:49,009 INFO L225 Difference]: With dead ends: 185 [2022-11-03 03:57:49,009 INFO L226 Difference]: Without dead ends: 181 [2022-11-03 03:57:49,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 167 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=358, Invalid=2092, Unknown=0, NotChecked=0, Total=2450 [2022-11-03 03:57:49,011 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 75 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:49,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 181 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 104 Invalid, 0 Unknown, 85 Unchecked, 0.5s Time] [2022-11-03 03:57:49,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-11-03 03:57:49,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 143. [2022-11-03 03:57:49,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 140 states have (on average 1.2) internal successors, (168), 142 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:49,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 168 transitions. [2022-11-03 03:57:49,031 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 168 transitions. Word has length 32 [2022-11-03 03:57:49,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:49,031 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 168 transitions. [2022-11-03 03:57:49,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.3125) internal successors, (138), 32 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:57:49,032 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 168 transitions. [2022-11-03 03:57:49,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-03 03:57:49,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:49,039 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:57:49,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:49,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:49,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-11-03 03:57:49,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:57:49,655 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-03 03:57:49,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:49,656 INFO L85 PathProgramCache]: Analyzing trace with hash 549279776, now seen corresponding path program 1 times [2022-11-03 03:57:49,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:57:49,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [969804757] [2022-11-03 03:57:49,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:49,657 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:57:49,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:57:49,658 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:57:49,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-03 03:57:49,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:49,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 03:57:49,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:49,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 03:57:50,832 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:50,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:53,132 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:53,132 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:57:53,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [969804757] [2022-11-03 03:57:53,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [969804757] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:57:53,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [33317501] [2022-11-03 03:57:53,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:53,133 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:57:53,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:57:53,134 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:57:53,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-03 03:57:53,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:53,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:57:53,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:53,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 03:57:54,963 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:54,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:57:57,921 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:57:57,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [33317501] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:57:57,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604285914] [2022-11-03 03:57:57,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:57,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:57:57,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:57:57,922 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:57:57,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-03 03:57:58,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:58,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:57:58,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:58,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 03:57:59,803 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 03:57:59,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:58:05,230 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 03:58:05,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604285914] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:58:05,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:58:05,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 12, 11, 8, 9] total 47 [2022-11-03 03:58:05,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792188469] [2022-11-03 03:58:05,231 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:58:05,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-03 03:58:05,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:58:05,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-03 03:58:05,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1958, Unknown=0, NotChecked=0, Total=2256 [2022-11-03 03:58:05,232 INFO L87 Difference]: Start difference. First operand 143 states and 168 transitions. Second operand has 48 states, 47 states have (on average 3.297872340425532) internal successors, (155), 48 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:32,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:58:32,715 INFO L93 Difference]: Finished difference Result 278 states and 323 transitions. [2022-11-03 03:58:32,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-03 03:58:32,719 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 3.297872340425532) internal successors, (155), 48 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-03 03:58:32,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:58:32,720 INFO L225 Difference]: With dead ends: 278 [2022-11-03 03:58:32,720 INFO L226 Difference]: Without dead ends: 278 [2022-11-03 03:58:32,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 151 SyntacticMatches, 11 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2496 ImplicationChecksByTransitivity, 31.3s TimeCoverageRelationStatistics Valid=1125, Invalid=6707, Unknown=0, NotChecked=0, Total=7832 [2022-11-03 03:58:32,723 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 690 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 1209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 356 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:58:32,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [690 Valid, 423 Invalid, 1209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 743 Invalid, 0 Unknown, 356 Unchecked, 5.9s Time] [2022-11-03 03:58:32,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-11-03 03:58:32,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 182. [2022-11-03 03:58:32,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 179 states have (on average 1.217877094972067) internal successors, (218), 181 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:32,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 218 transitions. [2022-11-03 03:58:32,731 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 218 transitions. Word has length 33 [2022-11-03 03:58:32,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:58:32,732 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 218 transitions. [2022-11-03 03:58:32,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 3.297872340425532) internal successors, (155), 48 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:32,732 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 218 transitions. [2022-11-03 03:58:32,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-03 03:58:32,733 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:32,733 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:58:32,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-03 03:58:32,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-03 03:58:33,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (41)] Ended with exit code 0 [2022-11-03 03:58:33,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 03:58:33,347 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-03 03:58:33,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:33,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1154994598, now seen corresponding path program 1 times [2022-11-03 03:58:33,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:58:33,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1851318456] [2022-11-03 03:58:33,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:33,348 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:58:33,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:58:33,350 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:58:33,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-03 03:58:33,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:33,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 03:58:33,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:33,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 03:58:34,629 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:58:34,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:58:36,642 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:58:36,642 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:58:36,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1851318456] [2022-11-03 03:58:36,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1851318456] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:58:36,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2116945317] [2022-11-03 03:58:36,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:36,643 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:58:36,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:58:36,644 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:58:36,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-11-03 03:58:36,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:36,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:58:36,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:37,870 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:58:37,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:58:39,594 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:58:39,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2116945317] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:58:39,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44885734] [2022-11-03 03:58:39,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:58:39,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:58:39,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:58:39,596 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:58:39,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-03 03:58:39,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:58:39,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 03:58:39,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:39,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 03:58:40,244 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:58:40,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:58:41,059 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:58:41,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44885734] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:58:41,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:58:41,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11, 10, 9, 8] total 33 [2022-11-03 03:58:41,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420406558] [2022-11-03 03:58:41,060 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:58:41,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-03 03:58:41,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:58:41,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-03 03:58:41,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2022-11-03 03:58:41,062 INFO L87 Difference]: Start difference. First operand 182 states and 218 transitions. Second operand has 33 states, 33 states have (on average 3.6363636363636362) internal successors, (120), 33 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:46,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:58:46,609 INFO L93 Difference]: Finished difference Result 195 states and 234 transitions. [2022-11-03 03:58:46,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-03 03:58:46,611 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.6363636363636362) internal successors, (120), 33 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-03 03:58:46,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:58:46,613 INFO L225 Difference]: With dead ends: 195 [2022-11-03 03:58:46,613 INFO L226 Difference]: Without dead ends: 181 [2022-11-03 03:58:46,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=282, Invalid=1788, Unknown=0, NotChecked=0, Total=2070 [2022-11-03 03:58:46,615 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 60 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:58:46,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 223 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 55 Invalid, 0 Unknown, 36 Unchecked, 0.4s Time] [2022-11-03 03:58:46,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-11-03 03:58:46,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 151. [2022-11-03 03:58:46,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 148 states have (on average 1.222972972972973) internal successors, (181), 150 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:46,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 181 transitions. [2022-11-03 03:58:46,621 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 181 transitions. Word has length 33 [2022-11-03 03:58:46,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:58:46,622 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 181 transitions. [2022-11-03 03:58:46,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.6363636363636362) internal successors, (120), 33 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:58:46,622 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 181 transitions. [2022-11-03 03:58:46,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 03:58:46,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:58:46,625 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1] [2022-11-03 03:58:46,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-11-03 03:58:46,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (44)] Ended with exit code 0 [2022-11-03 03:58:47,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-11-03 03:58:47,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:58:47,251 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-03 03:58:47,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:58:47,252 INFO L85 PathProgramCache]: Analyzing trace with hash -563143139, now seen corresponding path program 3 times [2022-11-03 03:58:47,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:58:47,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2088755097] [2022-11-03 03:58:47,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:58:47,252 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:58:47,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:58:47,254 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:58:47,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-03 03:58:47,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-03 03:58:47,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:58:47,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 03:58:47,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:47,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 03:58:48,541 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:58:48,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:58:51,763 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:58:51,763 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:58:51,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2088755097] [2022-11-03 03:58:51,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2088755097] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:58:51,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [298159003] [2022-11-03 03:58:51,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:58:51,764 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:58:51,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:58:51,765 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:58:51,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-11-03 03:58:52,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-03 03:58:52,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:58:52,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 03:58:52,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:58:52,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 03:58:53,765 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:58:53,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:59:04,680 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:04,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [298159003] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:59:04,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912839862] [2022-11-03 03:59:04,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:59:04,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:59:04,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:59:04,682 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:59:04,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-03 03:59:05,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-03 03:59:05,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:59:05,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 03:59:05,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:59:05,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 03:59:06,941 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:06,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:59:14,321 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:59:14,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912839862] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:59:14,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:59:14,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 13, 15, 14, 14] total 54 [2022-11-03 03:59:14,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841597311] [2022-11-03 03:59:14,329 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:59:14,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-03 03:59:14,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:59:14,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-03 03:59:14,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=818, Invalid=2152, Unknown=0, NotChecked=0, Total=2970 [2022-11-03 03:59:14,332 INFO L87 Difference]: Start difference. First operand 151 states and 181 transitions. Second operand has 55 states, 54 states have (on average 2.9444444444444446) internal successors, (159), 55 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:59:20,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:59:22,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:59:24,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:59:26,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:59:31,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:59:33,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:59:35,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:59:38,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:59:42,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:59:44,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:59:46,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:59:51,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:59:53,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:59:57,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:00:04,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:04,857 INFO L93 Difference]: Finished difference Result 1065 states and 1293 transitions. [2022-11-03 04:00:04,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-03 04:00:04,859 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 2.9444444444444446) internal successors, (159), 55 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-03 04:00:04,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:04,864 INFO L225 Difference]: With dead ends: 1065 [2022-11-03 04:00:04,865 INFO L226 Difference]: Without dead ends: 1065 [2022-11-03 04:00:04,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 147 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2313 ImplicationChecksByTransitivity, 29.1s TimeCoverageRelationStatistics Valid=1458, Invalid=3654, Unknown=0, NotChecked=0, Total=5112 [2022-11-03 04:00:04,867 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 1745 mSDsluCounter, 1132 mSDsCounter, 0 mSdLazyCounter, 1586 mSolverCounterSat, 73 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1745 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 1746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1586 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 35.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:04,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1745 Valid, 1188 Invalid, 1746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1586 Invalid, 13 Unknown, 74 Unchecked, 35.9s Time] [2022-11-03 04:00:04,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2022-11-03 04:00:04,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 183. [2022-11-03 04:00:04,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 180 states have (on average 1.2277777777777779) internal successors, (221), 182 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:04,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 221 transitions. [2022-11-03 04:00:04,880 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 221 transitions. Word has length 34 [2022-11-03 04:00:04,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:04,880 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 221 transitions. [2022-11-03 04:00:04,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 2.9444444444444446) internal successors, (159), 55 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:04,881 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 221 transitions. [2022-11-03 04:00:04,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-03 04:00:04,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:04,882 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:04,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-03 04:00:05,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-11-03 04:00:05,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (47)] Ended with exit code 0 [2022-11-03 04:00:05,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:00:05,498 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-03 04:00:05,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:05,499 INFO L85 PathProgramCache]: Analyzing trace with hash -249046629, now seen corresponding path program 2 times [2022-11-03 04:00:05,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:00:05,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1118526108] [2022-11-03 04:00:05,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:00:05,499 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:00:05,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:00:05,500 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:00:05,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-03 04:00:05,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:00:05,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:00:05,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 04:00:05,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:05,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 04:00:07,037 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 04:00:07,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:00:09,781 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 04:00:09,782 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:00:09,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1118526108] [2022-11-03 04:00:09,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1118526108] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:00:09,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1744202856] [2022-11-03 04:00:09,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:00:09,783 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:00:09,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:00:09,785 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:00:09,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-11-03 04:00:10,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:00:10,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:00:10,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:00:10,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:11,597 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:00:11,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:00:14,324 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:00:14,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1744202856] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:00:14,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227906705] [2022-11-03 04:00:14,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:00:14,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:00:14,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:00:14,326 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:00:14,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-03 04:00:14,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:00:14,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:00:14,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 04:00:14,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:15,750 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 04:00:15,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:00:17,395 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 04:00:17,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227906705] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:00:17,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:00:17,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13, 12, 9, 7] total 49 [2022-11-03 04:00:17,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576951110] [2022-11-03 04:00:17,397 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:00:17,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-03 04:00:17,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:00:17,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-03 04:00:17,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2127, Unknown=0, NotChecked=0, Total=2352 [2022-11-03 04:00:17,401 INFO L87 Difference]: Start difference. First operand 183 states and 221 transitions. Second operand has 49 states, 49 states have (on average 3.1020408163265305) internal successors, (152), 49 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:38,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:00:38,475 INFO L93 Difference]: Finished difference Result 273 states and 336 transitions. [2022-11-03 04:00:38,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-03 04:00:38,478 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.1020408163265305) internal successors, (152), 49 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-03 04:00:38,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:00:38,479 INFO L225 Difference]: With dead ends: 273 [2022-11-03 04:00:38,479 INFO L226 Difference]: Without dead ends: 265 [2022-11-03 04:00:38,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 174 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2252 ImplicationChecksByTransitivity, 28.8s TimeCoverageRelationStatistics Valid=794, Invalid=7578, Unknown=0, NotChecked=0, Total=8372 [2022-11-03 04:00:38,483 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 80 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:00:38,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 282 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 53 Unchecked, 0.7s Time] [2022-11-03 04:00:38,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-11-03 04:00:38,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 224. [2022-11-03 04:00:38,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 221 states have (on average 1.253393665158371) internal successors, (277), 223 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:38,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 277 transitions. [2022-11-03 04:00:38,491 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 277 transitions. Word has length 35 [2022-11-03 04:00:38,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:00:38,491 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 277 transitions. [2022-11-03 04:00:38,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.1020408163265305) internal successors, (152), 49 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:00:38,492 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 277 transitions. [2022-11-03 04:00:38,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-03 04:00:38,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:00:38,493 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:00:38,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2022-11-03 04:00:38,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-11-03 04:00:38,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-11-03 04:00:39,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:00:39,098 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-03 04:00:39,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:00:39,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1723241033, now seen corresponding path program 2 times [2022-11-03 04:00:39,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:00:39,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1331788174] [2022-11-03 04:00:39,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:00:39,100 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:00:39,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:00:39,101 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:00:39,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-03 04:00:39,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:00:39,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:00:39,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 04:00:39,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:39,314 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 04:00:40,250 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:40,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:00:44,354 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:44,355 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:00:44,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1331788174] [2022-11-03 04:00:44,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1331788174] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:00:44,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1767165615] [2022-11-03 04:00:44,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:00:44,356 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:00:44,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:00:44,357 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:00:44,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-11-03 04:00:44,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:00:44,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:00:44,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 04:00:44,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:46,110 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 04:00:46,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:00:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 04:00:48,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1767165615] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:00:48,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134748092] [2022-11-03 04:00:48,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:00:48,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:00:48,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:00:48,993 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:00:48,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-03 04:00:49,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:00:49,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:00:49,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 04:00:49,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:00:49,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 04:00:51,415 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:00:51,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:00,454 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:00,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134748092] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:00,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:01:00,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 12, 14, 14] total 63 [2022-11-03 04:01:00,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124335386] [2022-11-03 04:01:00,455 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:01:00,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-03 04:01:00,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:00,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-03 04:01:00,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=3523, Unknown=0, NotChecked=0, Total=3906 [2022-11-03 04:01:00,458 INFO L87 Difference]: Start difference. First operand 224 states and 277 transitions. Second operand has 63 states, 63 states have (on average 2.9206349206349205) internal successors, (184), 63 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:13,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:13,081 INFO L93 Difference]: Finished difference Result 245 states and 299 transitions. [2022-11-03 04:01:13,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-03 04:01:13,084 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.9206349206349205) internal successors, (184), 63 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-03 04:01:13,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:13,085 INFO L225 Difference]: With dead ends: 245 [2022-11-03 04:01:13,085 INFO L226 Difference]: Without dead ends: 245 [2022-11-03 04:01:13,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2020 ImplicationChecksByTransitivity, 24.6s TimeCoverageRelationStatistics Valid=663, Invalid=5499, Unknown=0, NotChecked=0, Total=6162 [2022-11-03 04:01:13,087 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 212 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:13,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 427 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 418 Invalid, 0 Unknown, 75 Unchecked, 3.0s Time] [2022-11-03 04:01:13,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-11-03 04:01:13,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 217. [2022-11-03 04:01:13,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 214 states have (on average 1.2429906542056075) internal successors, (266), 216 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:13,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 266 transitions. [2022-11-03 04:01:13,095 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 266 transitions. Word has length 37 [2022-11-03 04:01:13,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:13,096 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 266 transitions. [2022-11-03 04:01:13,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.9206349206349205) internal successors, (184), 63 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:13,097 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 266 transitions. [2022-11-03 04:01:13,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 04:01:13,098 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:13,098 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:13,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (53)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:13,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-11-03 04:01:13,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Ended with exit code 0 [2022-11-03 04:01:13,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:01:13,703 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-03 04:01:13,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:13,703 INFO L85 PathProgramCache]: Analyzing trace with hash -710345958, now seen corresponding path program 2 times [2022-11-03 04:01:13,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:13,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1227188471] [2022-11-03 04:01:13,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:01:13,704 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:13,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:13,705 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:13,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-03 04:01:13,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:01:13,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:01:13,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 04:01:13,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:13,905 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 04:01:14,949 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 04:01:14,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:16,399 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 04:01:16,400 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:16,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1227188471] [2022-11-03 04:01:16,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1227188471] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:16,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1092451672] [2022-11-03 04:01:16,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:01:16,400 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:01:16,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:01:16,401 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:01:16,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-11-03 04:01:16,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:01:16,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:01:16,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:01:16,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:17,750 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:01:17,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:19,806 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 04:01:19,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1092451672] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:19,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58100807] [2022-11-03 04:01:19,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:01:19,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:19,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:19,808 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:01:19,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-11-03 04:01:19,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:01:19,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:01:19,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 04:01:19,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:19,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 04:01:20,555 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 04:01:20,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:21,307 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 04:01:21,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58100807] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:21,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:01:21,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 13, 12, 8, 7] total 35 [2022-11-03 04:01:21,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069597006] [2022-11-03 04:01:21,308 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:01:21,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-03 04:01:21,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:21,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-03 04:01:21,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 04:01:21,310 INFO L87 Difference]: Start difference. First operand 217 states and 266 transitions. Second operand has 35 states, 35 states have (on average 3.342857142857143) internal successors, (117), 35 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:28,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:28,034 INFO L93 Difference]: Finished difference Result 300 states and 358 transitions. [2022-11-03 04:01:28,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-03 04:01:28,035 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.342857142857143) internal successors, (117), 35 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-03 04:01:28,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:28,036 INFO L225 Difference]: With dead ends: 300 [2022-11-03 04:01:28,036 INFO L226 Difference]: Without dead ends: 294 [2022-11-03 04:01:28,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 210 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=399, Invalid=2793, Unknown=0, NotChecked=0, Total=3192 [2022-11-03 04:01:28,038 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 192 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 248 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:28,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 301 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 242 Invalid, 0 Unknown, 248 Unchecked, 1.6s Time] [2022-11-03 04:01:28,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-11-03 04:01:28,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 208. [2022-11-03 04:01:28,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 205 states have (on average 1.2195121951219512) internal successors, (250), 207 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:28,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 250 transitions. [2022-11-03 04:01:28,045 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 250 transitions. Word has length 39 [2022-11-03 04:01:28,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:28,046 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 250 transitions. [2022-11-03 04:01:28,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.342857142857143) internal successors, (117), 35 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:01:28,046 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 250 transitions. [2022-11-03 04:01:28,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-03 04:01:28,047 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:28,048 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:28,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (56)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:28,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (55)] Ended with exit code 0 [2022-11-03 04:01:28,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-11-03 04:01:28,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:28,659 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-03 04:01:28,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:28,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1543386930, now seen corresponding path program 1 times [2022-11-03 04:01:28,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:01:28,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1665054918] [2022-11-03 04:01:28,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:28,660 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:01:28,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:01:28,662 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:01:28,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-03 04:01:28,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:28,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 04:01:28,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:28,858 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 04:01:29,882 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 04:01:29,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:32,554 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:32,554 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:01:32,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1665054918] [2022-11-03 04:01:32,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1665054918] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:32,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2037517230] [2022-11-03 04:01:32,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:32,555 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:01:32,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:01:32,557 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:01:32,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2022-11-03 04:01:32,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:32,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 04:01:32,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:34,255 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:01:34,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:36,997 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 04:01:36,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2037517230] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:36,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743621261] [2022-11-03 04:01:36,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:36,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:36,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:37,000 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:01:37,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-11-03 04:01:37,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:37,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 04:01:37,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:38,554 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 04:01:38,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:40,425 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 04:01:40,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743621261] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:40,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:01:40,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 13, 12, 9, 7] total 50 [2022-11-03 04:01:40,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440319041] [2022-11-03 04:01:40,426 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:01:40,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-03 04:01:40,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:01:40,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-03 04:01:40,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=2218, Unknown=0, NotChecked=0, Total=2450 [2022-11-03 04:01:40,429 INFO L87 Difference]: Start difference. First operand 208 states and 250 transitions. Second operand has 50 states, 50 states have (on average 3.7) internal successors, (185), 50 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:00,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:00,131 INFO L93 Difference]: Finished difference Result 251 states and 291 transitions. [2022-11-03 04:02:00,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-03 04:02:00,132 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.7) internal successors, (185), 50 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-11-03 04:02:00,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:00,133 INFO L225 Difference]: With dead ends: 251 [2022-11-03 04:02:00,134 INFO L226 Difference]: Without dead ends: 223 [2022-11-03 04:02:00,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 208 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2395 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=897, Invalid=8033, Unknown=0, NotChecked=0, Total=8930 [2022-11-03 04:02:00,136 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:00,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 273 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 253 Invalid, 0 Unknown, 40 Unchecked, 1.4s Time] [2022-11-03 04:02:00,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-11-03 04:02:00,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 184. [2022-11-03 04:02:00,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 181 states have (on average 1.1988950276243093) internal successors, (217), 183 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:00,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 217 transitions. [2022-11-03 04:02:00,143 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 217 transitions. Word has length 41 [2022-11-03 04:02:00,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:00,143 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 217 transitions. [2022-11-03 04:02:00,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.7) internal successors, (185), 50 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:00,144 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 217 transitions. [2022-11-03 04:02:00,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-03 04:02:00,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:00,145 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:00,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (59)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:00,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-11-03 04:02:00,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (58)] Ended with exit code 0 [2022-11-03 04:02:00,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:02:00,750 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-03 04:02:00,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:00,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1970005536, now seen corresponding path program 1 times [2022-11-03 04:02:00,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:00,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [266788889] [2022-11-03 04:02:00,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:00,751 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:00,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:00,753 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:00,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-03 04:02:00,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:00,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 04:02:00,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:00,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 04:02:01,900 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:01,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:05,976 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:05,977 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:05,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [266788889] [2022-11-03 04:02:05,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [266788889] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:05,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [577416263] [2022-11-03 04:02:05,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:05,978 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:05,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:02:05,979 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:02:05,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2022-11-03 04:02:06,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:06,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 04:02:06,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:08,087 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 04:02:08,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:10,981 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 04:02:10,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [577416263] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:10,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852712595] [2022-11-03 04:02:10,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:10,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:10,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:10,983 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:02:10,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-11-03 04:02:11,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:11,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 04:02:11,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:11,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 04:02:13,414 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:13,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:24,237 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:24,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852712595] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:24,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:02:24,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 14, 12, 13, 14] total 63 [2022-11-03 04:02:24,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238595004] [2022-11-03 04:02:24,239 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:02:24,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-03 04:02:24,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:02:24,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-03 04:02:24,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=3534, Unknown=0, NotChecked=0, Total=3906 [2022-11-03 04:02:24,241 INFO L87 Difference]: Start difference. First operand 184 states and 217 transitions. Second operand has 63 states, 63 states have (on average 3.4444444444444446) internal successors, (217), 63 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:39,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:39,684 INFO L93 Difference]: Finished difference Result 245 states and 290 transitions. [2022-11-03 04:02:39,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-03 04:02:39,687 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.4444444444444446) internal successors, (217), 63 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-03 04:02:39,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:39,688 INFO L225 Difference]: With dead ends: 245 [2022-11-03 04:02:39,688 INFO L226 Difference]: Without dead ends: 245 [2022-11-03 04:02:39,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2137 ImplicationChecksByTransitivity, 28.0s TimeCoverageRelationStatistics Valid=720, Invalid=6252, Unknown=0, NotChecked=0, Total=6972 [2022-11-03 04:02:39,690 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 165 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:39,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 426 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 470 Invalid, 0 Unknown, 37 Unchecked, 3.8s Time] [2022-11-03 04:02:39,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-11-03 04:02:39,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 199. [2022-11-03 04:02:39,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 196 states have (on average 1.1989795918367347) internal successors, (235), 198 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:39,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 235 transitions. [2022-11-03 04:02:39,694 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 235 transitions. Word has length 43 [2022-11-03 04:02:39,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:39,695 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 235 transitions. [2022-11-03 04:02:39,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.4444444444444446) internal successors, (217), 63 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:02:39,695 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 235 transitions. [2022-11-03 04:02:39,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 04:02:39,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:39,696 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:39,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:39,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-11-03 04:02:40,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (62)] Ended with exit code 0 [2022-11-03 04:02:40,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:40,307 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-03 04:02:40,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:40,307 INFO L85 PathProgramCache]: Analyzing trace with hash 776299786, now seen corresponding path program 3 times [2022-11-03 04:02:40,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:02:40,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [913506308] [2022-11-03 04:02:40,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:02:40,308 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:02:40,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:02:40,310 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:02:40,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-03 04:02:40,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-03 04:02:40,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:02:40,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 04:02:40,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:40,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 04:02:41,864 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:41,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:47,202 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:02:47,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [913506308] [2022-11-03 04:02:47,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [913506308] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:47,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1448016665] [2022-11-03 04:02:47,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:02:47,203 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:02:47,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:02:47,204 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:02:47,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2022-11-03 04:02:49,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-03 04:02:49,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:02:49,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 04:02:49,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:49,907 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 04:02:52,279 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 18 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:02:52,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:15,943 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:15,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1448016665] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:15,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639827843] [2022-11-03 04:03:15,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:03:15,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:03:15,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:03:15,945 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:03:15,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-11-03 04:03:16,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-03 04:03:16,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:03:16,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 04:03:16,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:03:16,587 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 04:03:18,856 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:18,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:03:32,996 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:03:32,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639827843] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:03:32,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:03:32,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 19, 17, 18] total 63 [2022-11-03 04:03:32,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201199667] [2022-11-03 04:03:32,998 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:03:32,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-03 04:03:32,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:03:32,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-03 04:03:33,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=3391, Unknown=0, NotChecked=0, Total=3906 [2022-11-03 04:03:33,000 INFO L87 Difference]: Start difference. First operand 199 states and 235 transitions. Second operand has 63 states, 63 states have (on average 2.984126984126984) internal successors, (188), 63 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:03:51,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:04:44,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:05:03,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:05:13,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:06:00,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:06:00,927 INFO L93 Difference]: Finished difference Result 597 states and 702 transitions. [2022-11-03 04:06:00,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-11-03 04:06:00,927 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.984126984126984) internal successors, (188), 63 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-03 04:06:00,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:06:00,929 INFO L225 Difference]: With dead ends: 597 [2022-11-03 04:06:00,929 INFO L226 Difference]: Without dead ends: 595 [2022-11-03 04:06:00,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 206 SyntacticMatches, 10 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4593 ImplicationChecksByTransitivity, 148.7s TimeCoverageRelationStatistics Valid=2480, Invalid=11800, Unknown=0, NotChecked=0, Total=14280 [2022-11-03 04:06:00,932 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 1016 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 155 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 2023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 452 IncrementalHoareTripleChecker+Unchecked, 30.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:06:00,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1016 Valid, 1072 Invalid, 2023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1413 Invalid, 3 Unknown, 452 Unchecked, 30.9s Time] [2022-11-03 04:06:00,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-11-03 04:06:00,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 339. [2022-11-03 04:06:00,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 336 states have (on average 1.2261904761904763) internal successors, (412), 338 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:06:00,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 412 transitions. [2022-11-03 04:06:00,944 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 412 transitions. Word has length 46 [2022-11-03 04:06:00,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:06:00,944 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 412 transitions. [2022-11-03 04:06:00,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.984126984126984) internal successors, (188), 63 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:06:00,945 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 412 transitions. [2022-11-03 04:06:00,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-03 04:06:00,946 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:06:00,946 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:06:00,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (65)] Forceful destruction successful, exit code 0 [2022-11-03 04:06:01,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-11-03 04:06:01,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Ended with exit code 0 [2022-11-03 04:06:01,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:06:01,554 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-03 04:06:01,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:06:01,555 INFO L85 PathProgramCache]: Analyzing trace with hash -917791020, now seen corresponding path program 3 times [2022-11-03 04:06:01,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:06:01,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1347809526] [2022-11-03 04:06:01,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:06:01,555 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:06:01,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:06:01,556 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:06:01,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-03 04:06:01,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 04:06:01,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:06:01,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 04:06:01,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:06:01,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 04:06:02,964 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 04:06:02,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:06:08,782 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 04:06:08,782 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:06:08,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1347809526] [2022-11-03 04:06:08,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1347809526] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:06:08,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1180582554] [2022-11-03 04:06:08,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:06:08,783 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:06:08,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:06:08,784 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:06:08,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2022-11-03 04:06:09,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 04:06:09,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:06:09,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 04:06:09,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:06:09,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 04:06:10,290 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 04:06:10,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:06:17,843 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 04:06:17,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1180582554] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:06:17,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683116666] [2022-11-03 04:06:17,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:06:17,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:06:17,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:06:17,845 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:06:17,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-11-03 04:06:18,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 04:06:18,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:06:18,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-03 04:06:18,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:06:18,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 04:06:18,927 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 04:06:18,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:06:26,705 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 04:06:26,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683116666] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:06:26,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:06:26,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10, 11, 10, 11] total 39 [2022-11-03 04:06:26,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310403494] [2022-11-03 04:06:26,706 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:06:26,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 04:06:26,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:06:26,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 04:06:26,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1322, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 04:06:26,707 INFO L87 Difference]: Start difference. First operand 339 states and 412 transitions. Second operand has 40 states, 39 states have (on average 3.2564102564102564) internal successors, (127), 40 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:06:55,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:06:57,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:07:16,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:07:26,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:08:05,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:08:05,115 INFO L93 Difference]: Finished difference Result 651 states and 781 transitions. [2022-11-03 04:08:05,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-03 04:08:05,116 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 3.2564102564102564) internal successors, (127), 40 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-11-03 04:08:05,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:08:05,118 INFO L225 Difference]: With dead ends: 651 [2022-11-03 04:08:05,118 INFO L226 Difference]: Without dead ends: 644 [2022-11-03 04:08:05,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 249 SyntacticMatches, 5 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2274 ImplicationChecksByTransitivity, 84.3s TimeCoverageRelationStatistics Valid=1541, Invalid=6291, Unknown=0, NotChecked=0, Total=7832 [2022-11-03 04:08:05,121 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 968 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 122 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 968 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 27.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:08:05,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [968 Valid, 354 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1014 Invalid, 2 Unknown, 111 Unchecked, 27.2s Time] [2022-11-03 04:08:05,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2022-11-03 04:08:05,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 535. [2022-11-03 04:08:05,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 532 states have (on average 1.2218045112781954) internal successors, (650), 534 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:08:05,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 650 transitions. [2022-11-03 04:08:05,136 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 650 transitions. Word has length 49 [2022-11-03 04:08:05,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:08:05,137 INFO L495 AbstractCegarLoop]: Abstraction has 535 states and 650 transitions. [2022-11-03 04:08:05,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 3.2564102564102564) internal successors, (127), 40 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:08:05,137 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 650 transitions. [2022-11-03 04:08:05,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-03 04:08:05,139 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:08:05,139 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:08:05,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-11-03 04:08:05,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (68)] Forceful destruction successful, exit code 0 [2022-11-03 04:08:05,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Ended with exit code 0 [2022-11-03 04:08:05,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:08:05,759 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-03 04:08:05,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:08:05,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1745187945, now seen corresponding path program 2 times [2022-11-03 04:08:05,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:08:05,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [848880969] [2022-11-03 04:08:05,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:08:05,761 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:08:05,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:08:05,763 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:08:05,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-03 04:08:06,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:08:06,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:08:06,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 04:08:06,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:06,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 04:08:07,282 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:07,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:13,531 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:13,531 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:08:13,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [848880969] [2022-11-03 04:08:13,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [848880969] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:13,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1791440400] [2022-11-03 04:08:13,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:08:13,532 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:08:13,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:08:13,533 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:08:13,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (71)] Waiting until timeout for monitored process [2022-11-03 04:08:13,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:08:13,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:08:13,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 04:08:13,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:15,588 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 04:08:15,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:18,609 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 04:08:18,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1791440400] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:18,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659703045] [2022-11-03 04:08:18,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 04:08:18,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:08:18,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:08:18,610 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:08:18,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-11-03 04:08:18,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 04:08:18,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:08:18,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 04:08:18,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:18,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 04:08:20,987 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:20,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:26,186 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:26,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659703045] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:26,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:08:26,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 12, 14, 13] total 56 [2022-11-03 04:08:26,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750055465] [2022-11-03 04:08:26,187 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:08:26,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-03 04:08:26,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:08:26,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-03 04:08:26,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=2772, Unknown=0, NotChecked=0, Total=3080 [2022-11-03 04:08:26,189 INFO L87 Difference]: Start difference. First operand 535 states and 650 transitions. Second operand has 56 states, 56 states have (on average 3.9285714285714284) internal successors, (220), 56 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:08:35,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:08:35,915 INFO L93 Difference]: Finished difference Result 649 states and 782 transitions. [2022-11-03 04:08:35,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-03 04:08:35,918 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.9285714285714284) internal successors, (220), 56 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-11-03 04:08:35,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:08:35,919 INFO L225 Difference]: With dead ends: 649 [2022-11-03 04:08:35,920 INFO L226 Difference]: Without dead ends: 649 [2022-11-03 04:08:35,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=550, Invalid=4562, Unknown=0, NotChecked=0, Total=5112 [2022-11-03 04:08:35,921 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 169 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:08:35,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 464 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 453 Invalid, 0 Unknown, 126 Unchecked, 2.4s Time] [2022-11-03 04:08:35,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-11-03 04:08:35,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 564. [2022-11-03 04:08:35,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 561 states have (on average 1.213903743315508) internal successors, (681), 563 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:08:35,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 681 transitions. [2022-11-03 04:08:35,938 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 681 transitions. Word has length 49 [2022-11-03 04:08:35,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:08:35,938 INFO L495 AbstractCegarLoop]: Abstraction has 564 states and 681 transitions. [2022-11-03 04:08:35,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.9285714285714284) internal successors, (220), 56 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:08:35,939 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 681 transitions. [2022-11-03 04:08:35,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 04:08:35,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:08:35,940 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:08:35,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-11-03 04:08:36,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (71)] Forceful destruction successful, exit code 0 [2022-11-03 04:08:36,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (70)] Forceful destruction successful, exit code 0 [2022-11-03 04:08:36,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 04:08:36,567 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-03 04:08:36,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:08:36,568 INFO L85 PathProgramCache]: Analyzing trace with hash -557992115, now seen corresponding path program 4 times [2022-11-03 04:08:36,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 04:08:36,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [863184512] [2022-11-03 04:08:36,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 04:08:36,568 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 04:08:36,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 04:08:36,569 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 04:08:36,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-03 04:08:36,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 04:08:36,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:08:36,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 04:08:36,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:36,814 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 04:08:38,311 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:38,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:46,829 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 17 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:46,830 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 04:08:46,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [863184512] [2022-11-03 04:08:46,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [863184512] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:46,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [143616937] [2022-11-03 04:08:46,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 04:08:46,830 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 04:08:46,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 04:08:46,831 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 04:08:46,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (74)] Waiting until timeout for monitored process [2022-11-03 04:08:47,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 04:08:47,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:08:47,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 04:08:47,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:50,258 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 8 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:50,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:08:55,166 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 8 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:08:55,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [143616937] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:08:55,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902229398] [2022-11-03 04:08:55,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 04:08:55,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:08:55,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:08:55,168 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:08:55,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7f9570e-751f-4337-8689-96ab65c15cff/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-11-03 04:08:55,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 04:08:55,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:08:55,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 04:08:55,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:08:55,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 [2022-11-03 04:08:58,476 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-03 04:08:58,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:09:11,758 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-03 04:09:11,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902229398] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:09:11,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 04:09:11,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 18, 16, 13, 13] total 80 [2022-11-03 04:09:11,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899267670] [2022-11-03 04:09:11,759 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 04:09:11,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-11-03 04:09:11,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 04:09:11,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-11-03 04:09:11,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=5612, Unknown=0, NotChecked=0, Total=6320 [2022-11-03 04:09:11,761 INFO L87 Difference]: Start difference. First operand 564 states and 681 transitions. Second operand has 80 states, 80 states have (on average 3.1) internal successors, (248), 80 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:09,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:10:11,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:10:33,465 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 []