./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh --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 bb0a504b43b0de742fcc89ebbe9d313056bb1824edece6c56238a649b6f48626 --- 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-2329fc7 [2022-12-14 04:42:12,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 04:42:12,823 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 04:42:12,842 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 04:42:12,843 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 04:42:12,844 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 04:42:12,845 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 04:42:12,847 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 04:42:12,848 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 04:42:12,849 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 04:42:12,850 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 04:42:12,851 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 04:42:12,852 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 04:42:12,853 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 04:42:12,854 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 04:42:12,855 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 04:42:12,856 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 04:42:12,857 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 04:42:12,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 04:42:12,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 04:42:12,862 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 04:42:12,863 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 04:42:12,864 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 04:42:12,865 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 04:42:12,868 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 04:42:12,869 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 04:42:12,869 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 04:42:12,870 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 04:42:12,870 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 04:42:12,871 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 04:42:12,871 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 04:42:12,872 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 04:42:12,873 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 04:42:12,874 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 04:42:12,875 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 04:42:12,875 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 04:42:12,876 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 04:42:12,876 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 04:42:12,876 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 04:42:12,877 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 04:42:12,878 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 04:42:12,878 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 04:42:12,900 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 04:42:12,900 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 04:42:12,901 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 04:42:12,901 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 04:42:12,901 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 04:42:12,902 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 04:42:12,902 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 04:42:12,902 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 04:42:12,902 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 04:42:12,902 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 04:42:12,903 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 04:42:12,903 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 04:42:12,903 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 04:42:12,903 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 04:42:12,903 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 04:42:12,904 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 04:42:12,904 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 04:42:12,904 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 04:42:12,905 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 04:42:12,905 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 04:42:12,905 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 04:42:12,905 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 04:42:12,906 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 04:42:12,906 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 04:42:12,906 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 04:42:12,906 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 04:42:12,906 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 04:42:12,907 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 04:42:12,907 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 04:42:12,907 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 04:42:12,907 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 04:42:12,907 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 04:42:12,907 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 04:42:12,908 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 04:42:12,908 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 04:42:12,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 04:42:12,908 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 04:42:12,908 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 04:42:12,909 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 04:42:12,909 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 04:42:12,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 04:42:12,909 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 04:42:12,909 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_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb0a504b43b0de742fcc89ebbe9d313056bb1824edece6c56238a649b6f48626 [2022-12-14 04:42:13,106 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 04:42:13,123 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 04:42:13,125 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 04:42:13,126 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 04:42:13,127 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 04:42:13,127 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i [2022-12-14 04:42:15,619 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 04:42:15,831 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 04:42:15,831 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i [2022-12-14 04:42:15,840 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/data/8b996cc97/bb32d78f73654f5982be4d6e7d5aadb0/FLAG830d2578d [2022-12-14 04:42:16,186 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/data/8b996cc97/bb32d78f73654f5982be4d6e7d5aadb0 [2022-12-14 04:42:16,189 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 04:42:16,190 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 04:42:16,191 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 04:42:16,191 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 04:42:16,195 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 04:42:16,196 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:42:16" (1/1) ... [2022-12-14 04:42:16,197 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5271fb49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:42:16, skipping insertion in model container [2022-12-14 04:42:16,197 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:42:16" (1/1) ... [2022-12-14 04:42:16,204 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 04:42:16,229 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 04:42:16,469 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 04:42:16,484 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) [2022-12-14 04:42:16,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@354530d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:42:16, skipping insertion in model container [2022-12-14 04:42:16,484 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 04:42:16,485 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 04:42:16,486 INFO L158 Benchmark]: Toolchain (without parser) took 295.75ms. Allocated memory is still 178.3MB. Free memory was 145.6MB in the beginning and 131.7MB in the end (delta: 13.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-12-14 04:42:16,486 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 109.1MB. Free memory is still 81.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 04:42:16,487 INFO L158 Benchmark]: CACSL2BoogieTranslator took 293.62ms. Allocated memory is still 178.3MB. Free memory was 144.9MB in the beginning and 131.7MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-14 04:42:16,488 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 109.1MB. Free memory is still 81.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 293.62ms. Allocated memory is still 178.3MB. Free memory was 144.9MB in the beginning and 131.7MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh --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 bb0a504b43b0de742fcc89ebbe9d313056bb1824edece6c56238a649b6f48626 --- 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-2329fc7 [2022-12-14 04:42:17,868 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 04:42:17,870 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 04:42:17,898 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 04:42:17,898 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 04:42:17,899 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 04:42:17,900 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 04:42:17,902 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 04:42:17,903 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 04:42:17,904 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 04:42:17,905 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 04:42:17,906 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 04:42:17,906 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 04:42:17,907 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 04:42:17,908 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 04:42:17,909 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 04:42:17,910 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 04:42:17,910 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 04:42:17,912 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 04:42:17,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 04:42:17,915 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 04:42:17,916 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 04:42:17,917 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 04:42:17,918 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 04:42:17,921 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 04:42:17,921 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 04:42:17,922 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 04:42:17,922 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 04:42:17,923 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 04:42:17,924 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 04:42:17,924 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 04:42:17,925 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 04:42:17,925 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 04:42:17,926 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 04:42:17,927 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 04:42:17,927 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 04:42:17,928 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 04:42:17,928 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 04:42:17,928 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 04:42:17,929 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 04:42:17,929 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 04:42:17,930 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 04:42:17,945 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 04:42:17,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 04:42:17,945 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 04:42:17,945 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 04:42:17,946 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 04:42:17,946 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 04:42:17,946 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 04:42:17,946 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 04:42:17,946 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 04:42:17,946 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 04:42:17,947 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 04:42:17,947 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 04:42:17,947 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 04:42:17,947 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 04:42:17,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 04:42:17,947 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 04:42:17,948 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 04:42:17,948 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 04:42:17,948 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 04:42:17,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 04:42:17,948 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 04:42:17,948 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 04:42:17,948 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 04:42:17,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 04:42:17,948 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 04:42:17,948 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 04:42:17,948 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 04:42:17,949 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 04:42:17,949 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 04:42:17,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 04:42:17,949 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 04:42:17,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 04:42:17,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 04:42:17,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 04:42:17,949 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 04:42:17,949 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 04:42:17,949 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 04:42:17,950 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 04:42:17,950 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 04:42:17,950 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_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb0a504b43b0de742fcc89ebbe9d313056bb1824edece6c56238a649b6f48626 [2022-12-14 04:42:18,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 04:42:18,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 04:42:18,184 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 04:42:18,185 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 04:42:18,186 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 04:42:18,186 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i [2022-12-14 04:42:20,717 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 04:42:20,932 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 04:42:20,932 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i [2022-12-14 04:42:20,942 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/data/e2302abc2/4ef66442f60a4beb93b36d70ae66db9e/FLAG454ad34a7 [2022-12-14 04:42:21,275 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/data/e2302abc2/4ef66442f60a4beb93b36d70ae66db9e [2022-12-14 04:42:21,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 04:42:21,279 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 04:42:21,280 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 04:42:21,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 04:42:21,283 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 04:42:21,283 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:42:21" (1/1) ... [2022-12-14 04:42:21,284 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37db1ac6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:42:21, skipping insertion in model container [2022-12-14 04:42:21,285 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:42:21" (1/1) ... [2022-12-14 04:42:21,290 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 04:42:21,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 04:42:21,627 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 04:42:21,647 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 04:42:21,655 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 04:42:21,704 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 04:42:21,712 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 04:42:21,759 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 04:42:21,826 INFO L208 MainTranslator]: Completed translation [2022-12-14 04:42:21,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:42:21 WrapperNode [2022-12-14 04:42:21,826 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 04:42:21,827 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 04:42:21,828 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 04:42:21,828 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 04:42:21,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:42:21" (1/1) ... [2022-12-14 04:42:21,853 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:42:21" (1/1) ... [2022-12-14 04:42:21,873 INFO L138 Inliner]: procedures = 167, calls = 80, calls flagged for inlining = 24, calls inlined = 6, statements flattened = 99 [2022-12-14 04:42:21,874 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 04:42:21,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 04:42:21,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 04:42:21,875 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 04:42:21,883 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:42:21" (1/1) ... [2022-12-14 04:42:21,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:42:21" (1/1) ... [2022-12-14 04:42:21,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:42:21" (1/1) ... [2022-12-14 04:42:21,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:42:21" (1/1) ... [2022-12-14 04:42:21,894 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:42:21" (1/1) ... [2022-12-14 04:42:21,897 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:42:21" (1/1) ... [2022-12-14 04:42:21,899 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:42:21" (1/1) ... [2022-12-14 04:42:21,900 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:42:21" (1/1) ... [2022-12-14 04:42:21,903 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 04:42:21,904 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 04:42:21,904 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 04:42:21,904 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 04:42:21,905 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:42:21" (1/1) ... [2022-12-14 04:42:21,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 04:42:21,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:42:21,930 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 04:42:21,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 04:42:21,963 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-12-14 04:42:21,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-12-14 04:42:21,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 04:42:21,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 04:42:21,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 04:42:21,964 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 04:42:21,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 04:42:21,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 04:42:21,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 04:42:21,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 04:42:22,060 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 04:42:22,062 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 04:42:22,317 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 04:42:22,323 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 04:42:22,324 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-14 04:42:22,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:42:22 BoogieIcfgContainer [2022-12-14 04:42:22,326 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 04:42:22,328 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 04:42:22,329 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 04:42:22,331 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 04:42:22,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:42:21" (1/3) ... [2022-12-14 04:42:22,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@329a39a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:42:22, skipping insertion in model container [2022-12-14 04:42:22,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:42:21" (2/3) ... [2022-12-14 04:42:22,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@329a39a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:42:22, skipping insertion in model container [2022-12-14 04:42:22,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:42:22" (3/3) ... [2022-12-14 04:42:22,334 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test17_2-2.i [2022-12-14 04:42:22,349 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 04:42:22,349 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-12-14 04:42:22,395 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 04:42:22,400 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;@1b08d9db, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 04:42:22,400 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-12-14 04:42:22,405 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 63 states have internal predecessors, (76), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 04:42:22,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 04:42:22,411 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:42:22,411 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:42:22,412 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:42:22,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:42:22,416 INFO L85 PathProgramCache]: Analyzing trace with hash 858994893, now seen corresponding path program 1 times [2022-12-14 04:42:22,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:42:22,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1093418202] [2022-12-14 04:42:22,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:22,426 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:42:22,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:42:22,428 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:42:22,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-14 04:42:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:22,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-14 04:42:22,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:42:22,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:42:22,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:42:22,565 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:42:22,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1093418202] [2022-12-14 04:42:22,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1093418202] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:42:22,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:42:22,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 04:42:22,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210482220] [2022-12-14 04:42:22,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:42:22,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 04:42:22,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:42:22,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 04:42:22,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 04:42:22,596 INFO L87 Difference]: Start difference. First operand has 67 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 63 states have internal predecessors, (76), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 04:42:22,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:42:22,611 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2022-12-14 04:42:22,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 04:42:22,613 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-12-14 04:42:22,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:42:22,618 INFO L225 Difference]: With dead ends: 67 [2022-12-14 04:42:22,618 INFO L226 Difference]: Without dead ends: 65 [2022-12-14 04:42:22,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 04:42:22,622 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:42:22,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 04:42:22,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-12-14 04:42:22,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-12-14 04:42:22,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 61 states have internal predecessors, (69), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 04:42:22,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2022-12-14 04:42:22,648 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 14 [2022-12-14 04:42:22,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:42:22,649 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2022-12-14 04:42:22,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 04:42:22,649 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2022-12-14 04:42:22,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 04:42:22,650 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:42:22,650 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:42:22,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-14 04:42:22,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:42:22,853 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:42:22,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:42:22,855 INFO L85 PathProgramCache]: Analyzing trace with hash 465967883, now seen corresponding path program 1 times [2022-12-14 04:42:22,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:42:22,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1961430658] [2022-12-14 04:42:22,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:22,857 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:42:22,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:42:22,861 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:42:22,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-14 04:42:22,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:23,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 04:42:23,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:42:23,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:42:23,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:42:23,043 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:42:23,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1961430658] [2022-12-14 04:42:23,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1961430658] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:42:23,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:42:23,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 04:42:23,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869271473] [2022-12-14 04:42:23,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:42:23,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 04:42:23,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:42:23,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 04:42:23,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 04:42:23,047 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 04:42:23,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:42:23,134 INFO L93 Difference]: Finished difference Result 121 states and 137 transitions. [2022-12-14 04:42:23,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 04:42:23,135 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-12-14 04:42:23,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:42:23,137 INFO L225 Difference]: With dead ends: 121 [2022-12-14 04:42:23,137 INFO L226 Difference]: Without dead ends: 121 [2022-12-14 04:42:23,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 04:42:23,139 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 57 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:42:23,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 249 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:42:23,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-12-14 04:42:23,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 69. [2022-12-14 04:42:23,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 45 states have (on average 1.6) internal successors, (72), 64 states have internal predecessors, (72), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 04:42:23,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2022-12-14 04:42:23,150 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 14 [2022-12-14 04:42:23,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:42:23,150 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2022-12-14 04:42:23,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 04:42:23,150 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2022-12-14 04:42:23,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 04:42:23,151 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:42:23,151 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:42:23,158 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-14 04:42:23,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:42:23,353 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:42:23,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:42:23,356 INFO L85 PathProgramCache]: Analyzing trace with hash 465866789, now seen corresponding path program 1 times [2022-12-14 04:42:23,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:42:23,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [24056974] [2022-12-14 04:42:23,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:23,359 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:42:23,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:42:23,363 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:42:23,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-14 04:42:23,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:23,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 04:42:23,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:42:23,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:42:23,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:42:23,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:42:23,506 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:42:23,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [24056974] [2022-12-14 04:42:23,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [24056974] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:42:23,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:42:23,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 04:42:23,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448878142] [2022-12-14 04:42:23,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:42:23,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 04:42:23,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:42:23,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 04:42:23,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 04:42:23,508 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 04:42:23,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:42:23,655 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2022-12-14 04:42:23,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 04:42:23,656 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-12-14 04:42:23,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:42:23,656 INFO L225 Difference]: With dead ends: 93 [2022-12-14 04:42:23,657 INFO L226 Difference]: Without dead ends: 93 [2022-12-14 04:42:23,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 04:42:23,658 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 24 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:42:23,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 188 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:42:23,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-12-14 04:42:23,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 80. [2022-12-14 04:42:23,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 56 states have (on average 1.5892857142857142) internal successors, (89), 75 states have internal predecessors, (89), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 04:42:23,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2022-12-14 04:42:23,667 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 14 [2022-12-14 04:42:23,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:42:23,667 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2022-12-14 04:42:23,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 04:42:23,667 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2022-12-14 04:42:23,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 04:42:23,668 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:42:23,668 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:42:23,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-14 04:42:23,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:42:23,870 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:42:23,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:42:23,872 INFO L85 PathProgramCache]: Analyzing trace with hash 465866790, now seen corresponding path program 1 times [2022-12-14 04:42:23,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:42:23,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1119657853] [2022-12-14 04:42:23,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:23,876 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:42:23,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:42:23,879 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:42:23,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-14 04:42:23,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:23,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 04:42:23,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:42:23,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:42:24,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:42:24,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:42:24,174 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:42:24,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1119657853] [2022-12-14 04:42:24,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1119657853] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:42:24,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:42:24,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-14 04:42:24,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764280371] [2022-12-14 04:42:24,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:42:24,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 04:42:24,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:42:24,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 04:42:24,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-12-14 04:42:24,175 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 04:42:24,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:42:24,786 INFO L93 Difference]: Finished difference Result 117 states and 138 transitions. [2022-12-14 04:42:24,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 04:42:24,786 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-12-14 04:42:24,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:42:24,787 INFO L225 Difference]: With dead ends: 117 [2022-12-14 04:42:24,787 INFO L226 Difference]: Without dead ends: 117 [2022-12-14 04:42:24,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-12-14 04:42:24,789 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 222 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 04:42:24,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 429 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 04:42:24,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-12-14 04:42:24,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 100. [2022-12-14 04:42:24,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 76 states have (on average 1.5657894736842106) internal successors, (119), 95 states have internal predecessors, (119), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 04:42:24,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 125 transitions. [2022-12-14 04:42:24,795 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 125 transitions. Word has length 14 [2022-12-14 04:42:24,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:42:24,795 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 125 transitions. [2022-12-14 04:42:24,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 04:42:24,795 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 125 transitions. [2022-12-14 04:42:24,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 04:42:24,796 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:42:24,796 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:42:24,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-14 04:42:24,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:42:24,998 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:42:25,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:42:25,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1353471564, now seen corresponding path program 1 times [2022-12-14 04:42:25,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:42:25,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1579437377] [2022-12-14 04:42:25,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:25,003 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:42:25,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:42:25,007 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:42:25,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-14 04:42:25,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:25,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 04:42:25,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:42:25,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:42:25,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:42:25,159 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:42:25,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1579437377] [2022-12-14 04:42:25,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1579437377] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:42:25,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:42:25,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 04:42:25,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806513501] [2022-12-14 04:42:25,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:42:25,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 04:42:25,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:42:25,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 04:42:25,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 04:42:25,161 INFO L87 Difference]: Start difference. First operand 100 states and 125 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 04:42:25,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:42:25,264 INFO L93 Difference]: Finished difference Result 144 states and 174 transitions. [2022-12-14 04:42:25,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 04:42:25,264 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-12-14 04:42:25,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:42:25,266 INFO L225 Difference]: With dead ends: 144 [2022-12-14 04:42:25,266 INFO L226 Difference]: Without dead ends: 142 [2022-12-14 04:42:25,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 04:42:25,267 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 48 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:42:25,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 200 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:42:25,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-12-14 04:42:25,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 100. [2022-12-14 04:42:25,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 76 states have (on average 1.5526315789473684) internal successors, (118), 95 states have internal predecessors, (118), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 04:42:25,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2022-12-14 04:42:25,276 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 14 [2022-12-14 04:42:25,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:42:25,276 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2022-12-14 04:42:25,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 04:42:25,276 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2022-12-14 04:42:25,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 04:42:25,277 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:42:25,277 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:42:25,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-12-14 04:42:25,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:42:25,478 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:42:25,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:42:25,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1353370470, now seen corresponding path program 1 times [2022-12-14 04:42:25,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:42:25,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [158585668] [2022-12-14 04:42:25,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:25,482 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:42:25,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:42:25,484 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:42:25,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-14 04:42:25,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:25,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 04:42:25,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:42:25,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:42:25,666 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:42:25,666 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:42:25,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [158585668] [2022-12-14 04:42:25,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [158585668] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:42:25,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:42:25,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 04:42:25,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257215473] [2022-12-14 04:42:25,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:42:25,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 04:42:25,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:42:25,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 04:42:25,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 04:42:25,668 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 04:42:25,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:42:25,708 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2022-12-14 04:42:25,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 04:42:25,709 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-12-14 04:42:25,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:42:25,710 INFO L225 Difference]: With dead ends: 86 [2022-12-14 04:42:25,710 INFO L226 Difference]: Without dead ends: 84 [2022-12-14 04:42:25,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 04:42:25,711 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 0 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:42:25,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 275 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 04:42:25,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-12-14 04:42:25,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-12-14 04:42:25,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 80 states have internal predecessors, (95), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 04:42:25,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2022-12-14 04:42:25,717 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 14 [2022-12-14 04:42:25,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:42:25,717 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2022-12-14 04:42:25,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 04:42:25,718 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2022-12-14 04:42:25,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 04:42:25,718 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:42:25,718 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:42:25,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-14 04:42:25,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:42:25,920 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:42:25,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:42:25,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1598186502, now seen corresponding path program 1 times [2022-12-14 04:42:25,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:42:25,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888490579] [2022-12-14 04:42:25,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:25,922 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:42:25,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:42:25,925 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:42:25,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-14 04:42:26,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:26,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 04:42:26,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:42:26,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:42:26,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:42:26,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:42:27,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:42:27,426 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:42:27,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888490579] [2022-12-14 04:42:27,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888490579] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:42:27,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [368660354] [2022-12-14 04:42:27,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:27,426 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:42:27,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:42:27,428 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:42:27,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-12-14 04:42:27,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:27,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 04:42:27,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:42:27,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:42:27,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:42:27,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:42:27,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:42:27,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [368660354] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:42:27,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011362564] [2022-12-14 04:42:27,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:27,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:42:27,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:42:27,916 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:42:27,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 04:42:27,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:27,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 04:42:27,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:42:27,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:42:28,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:42:28,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:42:28,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:42:28,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011362564] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:42:28,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 04:42:28,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 9, 11, 9] total 20 [2022-12-14 04:42:28,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17670968] [2022-12-14 04:42:28,395 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 04:42:28,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 04:42:28,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:42:28,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 04:42:28,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-12-14 04:42:28,396 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand has 21 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 04:42:30,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:42:30,796 INFO L93 Difference]: Finished difference Result 138 states and 159 transitions. [2022-12-14 04:42:30,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 04:42:30,797 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-12-14 04:42:30,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:42:30,797 INFO L225 Difference]: With dead ends: 138 [2022-12-14 04:42:30,797 INFO L226 Difference]: Without dead ends: 138 [2022-12-14 04:42:30,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=259, Invalid=1001, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 04:42:30,798 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 561 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:42:30,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 501 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 04:42:30,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-12-14 04:42:30,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 93. [2022-12-14 04:42:30,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 70 states have (on average 1.5285714285714285) internal successors, (107), 89 states have internal predecessors, (107), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 04:42:30,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2022-12-14 04:42:30,804 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 17 [2022-12-14 04:42:30,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:42:30,804 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2022-12-14 04:42:30,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 04:42:30,805 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2022-12-14 04:42:30,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 04:42:30,805 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:42:30,805 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:42:30,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2022-12-14 04:42:31,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-12-14 04:42:31,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 04:42:31,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:42:31,410 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:42:31,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:42:31,411 INFO L85 PathProgramCache]: Analyzing trace with hash 740047555, now seen corresponding path program 1 times [2022-12-14 04:42:31,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:42:31,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1186973590] [2022-12-14 04:42:31,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:31,413 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:42:31,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:42:31,416 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:42:31,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-14 04:42:31,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:31,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 04:42:31,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:42:31,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:42:31,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 04:42:31,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:42:31,515 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:42:31,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1186973590] [2022-12-14 04:42:31,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1186973590] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:42:31,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:42:31,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 04:42:31,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968674578] [2022-12-14 04:42:31,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:42:31,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 04:42:31,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:42:31,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 04:42:31,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 04:42:31,516 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 04:42:31,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:42:31,665 INFO L93 Difference]: Finished difference Result 103 states and 123 transitions. [2022-12-14 04:42:31,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 04:42:31,666 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-12-14 04:42:31,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:42:31,667 INFO L225 Difference]: With dead ends: 103 [2022-12-14 04:42:31,667 INFO L226 Difference]: Without dead ends: 103 [2022-12-14 04:42:31,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 04:42:31,668 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 33 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:42:31,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 218 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:42:31,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-12-14 04:42:31,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2022-12-14 04:42:31,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 71 states have (on average 1.5352112676056338) internal successors, (109), 90 states have internal predecessors, (109), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 04:42:31,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 114 transitions. [2022-12-14 04:42:31,673 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 114 transitions. Word has length 22 [2022-12-14 04:42:31,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:42:31,673 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 114 transitions. [2022-12-14 04:42:31,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 04:42:31,673 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 114 transitions. [2022-12-14 04:42:31,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 04:42:31,674 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:42:31,674 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:42:31,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-12-14 04:42:31,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:42:31,875 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:42:31,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:42:31,875 INFO L85 PathProgramCache]: Analyzing trace with hash 740047556, now seen corresponding path program 1 times [2022-12-14 04:42:31,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:42:31,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [624458808] [2022-12-14 04:42:31,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:31,876 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:42:31,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:42:31,877 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:42:31,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-14 04:42:31,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:31,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 04:42:31,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:42:31,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:42:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:42:32,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:42:33,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:42:33,132 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:42:33,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [624458808] [2022-12-14 04:42:33,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [624458808] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 04:42:33,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 04:42:33,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 16 [2022-12-14 04:42:33,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021529209] [2022-12-14 04:42:33,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:42:33,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 04:42:33,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:42:33,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 04:42:33,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-12-14 04:42:33,134 INFO L87 Difference]: Start difference. First operand 94 states and 114 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 04:42:34,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:42:34,512 INFO L93 Difference]: Finished difference Result 151 states and 170 transitions. [2022-12-14 04:42:34,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 04:42:34,514 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-12-14 04:42:34,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:42:34,515 INFO L225 Difference]: With dead ends: 151 [2022-12-14 04:42:34,515 INFO L226 Difference]: Without dead ends: 151 [2022-12-14 04:42:34,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-12-14 04:42:34,516 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 145 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:42:34,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 276 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 04:42:34,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-12-14 04:42:34,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 94. [2022-12-14 04:42:34,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 71 states have (on average 1.5211267605633803) internal successors, (108), 90 states have internal predecessors, (108), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 04:42:34,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2022-12-14 04:42:34,519 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 22 [2022-12-14 04:42:34,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:42:34,519 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2022-12-14 04:42:34,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 04:42:34,519 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2022-12-14 04:42:34,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 04:42:34,520 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:42:34,520 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:42:34,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-12-14 04:42:34,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:42:34,721 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:42:34,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:42:34,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1466637803, now seen corresponding path program 1 times [2022-12-14 04:42:34,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:42:34,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1305985123] [2022-12-14 04:42:34,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:34,724 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:42:34,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:42:34,727 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:42:34,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-12-14 04:42:34,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:34,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 04:42:34,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:42:34,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 treesize of output 7 [2022-12-14 04:42:34,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 04:42:34,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:42:34,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:42:34,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-14 04:42:34,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-12-14 04:42:34,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:42:34,870 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:42:34,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1305985123] [2022-12-14 04:42:34,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1305985123] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:42:34,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [13158932] [2022-12-14 04:42:34,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:34,871 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:42:34,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:42:34,872 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:42:34,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-12-14 04:42:34,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:34,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 04:42:34,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:42:35,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:42:35,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:42:35,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:42:35,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [13158932] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:42:35,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050322193] [2022-12-14 04:42:35,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:35,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:42:35,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:42:35,309 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:42:35,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 04:42:35,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:35,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 04:42:35,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:42:35,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:42:35,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:42:35,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:42:35,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050322193] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:42:35,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 04:42:35,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 9, 7, 9, 7] total 19 [2022-12-14 04:42:35,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397341217] [2022-12-14 04:42:35,432 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 04:42:35,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 04:42:35,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:42:35,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 04:42:35,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-12-14 04:42:35,433 INFO L87 Difference]: Start difference. First operand 94 states and 113 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 04:42:36,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:42:36,614 INFO L93 Difference]: Finished difference Result 300 states and 323 transitions. [2022-12-14 04:42:36,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 04:42:36,614 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2022-12-14 04:42:36,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:42:36,615 INFO L225 Difference]: With dead ends: 300 [2022-12-14 04:42:36,615 INFO L226 Difference]: Without dead ends: 300 [2022-12-14 04:42:36,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=451, Invalid=1271, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 04:42:36,616 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 1523 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1523 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 04:42:36,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1523 Valid, 489 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 04:42:36,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-12-14 04:42:36,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 94. [2022-12-14 04:42:36,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 70 states have (on average 1.5714285714285714) internal successors, (110), 89 states have internal predecessors, (110), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 04:42:36,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 118 transitions. [2022-12-14 04:42:36,620 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 118 transitions. Word has length 23 [2022-12-14 04:42:36,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:42:36,620 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 118 transitions. [2022-12-14 04:42:36,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 04:42:36,620 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 118 transitions. [2022-12-14 04:42:36,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 04:42:36,621 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:42:36,621 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:42:36,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 04:42:36,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-12-14 04:42:37,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2022-12-14 04:42:37,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 04:42:37,223 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:42:37,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:42:37,225 INFO L85 PathProgramCache]: Analyzing trace with hash -878858933, now seen corresponding path program 1 times [2022-12-14 04:42:37,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:42:37,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1684213980] [2022-12-14 04:42:37,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:37,226 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:42:37,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:42:37,227 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:42:37,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-12-14 04:42:37,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:37,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 04:42:37,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:42:37,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:42:37,343 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| (_ bv1 1)) |c_#valid|)) is different from true [2022-12-14 04:42:37,356 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 04:42:37,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 04:42:37,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-12-14 04:42:37,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:42:37,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 04:42:37,488 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:42:37,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1684213980] [2022-12-14 04:42:37,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1684213980] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:42:37,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1935304523] [2022-12-14 04:42:37,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:37,489 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:42:37,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:42:37,489 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:42:37,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-12-14 04:42:37,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:37,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 04:42:37,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:42:37,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:42:37,613 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_111 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_111))))) is different from true [2022-12-14 04:42:37,632 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 04:42:37,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 04:42:37,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-12-14 04:42:37,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:42:37,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 04:42:37,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1935304523] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:42:37,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344710730] [2022-12-14 04:42:37,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:37,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:42:37,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:42:37,750 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:42:37,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 04:42:37,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:37,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 04:42:37,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:42:37,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:42:37,847 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_127 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_127))))) is different from true [2022-12-14 04:42:37,871 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 04:42:37,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 04:42:37,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-12-14 04:42:37,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:42:37,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 04:42:37,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344710730] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:42:37,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 04:42:37,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7, 6, 7, 6] total 10 [2022-12-14 04:42:37,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662929951] [2022-12-14 04:42:37,987 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 04:42:37,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 04:42:37,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:42:37,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 04:42:37,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=45, Unknown=3, NotChecked=42, Total=110 [2022-12-14 04:42:37,988 INFO L87 Difference]: Start difference. First operand 94 states and 118 transitions. Second operand has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 04:42:38,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:42:38,257 INFO L93 Difference]: Finished difference Result 146 states and 180 transitions. [2022-12-14 04:42:38,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 04:42:38,258 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 26 [2022-12-14 04:42:38,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:42:38,258 INFO L225 Difference]: With dead ends: 146 [2022-12-14 04:42:38,258 INFO L226 Difference]: Without dead ends: 146 [2022-12-14 04:42:38,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 132 SyntacticMatches, 9 SemanticMatches, 11 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=71, Unknown=3, NotChecked=54, Total=156 [2022-12-14 04:42:38,259 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 101 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 04:42:38,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 268 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 189 Invalid, 0 Unknown, 210 Unchecked, 0.2s Time] [2022-12-14 04:42:38,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-12-14 04:42:38,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104. [2022-12-14 04:42:38,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 82 states have (on average 1.524390243902439) internal successors, (125), 99 states have internal predecessors, (125), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 04:42:38,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 133 transitions. [2022-12-14 04:42:38,264 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 133 transitions. Word has length 26 [2022-12-14 04:42:38,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:42:38,264 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 133 transitions. [2022-12-14 04:42:38,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 04:42:38,264 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 133 transitions. [2022-12-14 04:42:38,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 04:42:38,265 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:42:38,265 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:42:38,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 04:42:38,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-12-14 04:42:38,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-12-14 04:42:38,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 04:42:38,868 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:42:38,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:42:38,869 INFO L85 PathProgramCache]: Analyzing trace with hash -878858932, now seen corresponding path program 1 times [2022-12-14 04:42:38,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:42:38,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917846187] [2022-12-14 04:42:38,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:38,870 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:42:38,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:42:38,873 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:42:38,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-12-14 04:42:38,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:38,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 04:42:38,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:42:38,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:42:39,254 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| |c_ldv_malloc_#in~size|) |c_#length|)) is different from true [2022-12-14 04:42:39,276 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 04:42:39,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 04:42:39,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-14 04:42:39,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:42:39,667 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:42:39,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [917846187] [2022-12-14 04:42:39,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [917846187] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:42:39,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1617867014] [2022-12-14 04:42:39,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:39,668 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:42:39,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:42:39,669 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:42:39,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-12-14 04:42:39,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:39,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 04:42:39,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:42:39,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:42:39,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:42:40,239 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_157 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_157) |c_#length|)))) is different from true [2022-12-14 04:42:40,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:40,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 04:42:40,262 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 04:42:40,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 04:42:40,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-14 04:42:40,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:42:44,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1617867014] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:42:44,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368196144] [2022-12-14 04:42:44,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:42:44,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:42:44,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:42:44,602 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:42:44,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 04:42:44,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:42:44,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 04:42:44,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:42:44,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:42:44,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:42:44,831 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_173 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_173))) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-12-14 04:42:44,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:42:44,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 04:42:44,863 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 04:42:44,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 04:42:44,887 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-14 04:42:44,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:42:45,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368196144] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:42:45,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:42:45,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 25 [2022-12-14 04:42:45,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851702342] [2022-12-14 04:42:45,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:42:45,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 04:42:45,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:42:45,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 04:42:45,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=564, Unknown=4, NotChecked=150, Total=812 [2022-12-14 04:42:45,145 INFO L87 Difference]: Start difference. First operand 104 states and 133 transitions. Second operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 04:42:47,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:42:47,687 INFO L93 Difference]: Finished difference Result 391 states and 470 transitions. [2022-12-14 04:42:47,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 04:42:47,687 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 26 [2022-12-14 04:42:47,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:42:47,688 INFO L225 Difference]: With dead ends: 391 [2022-12-14 04:42:47,689 INFO L226 Difference]: Without dead ends: 391 [2022-12-14 04:42:47,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=254, Invalid=1314, Unknown=4, NotChecked=234, Total=1806 [2022-12-14 04:42:47,689 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 818 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 1169 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 1849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 621 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 04:42:47,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [818 Valid, 927 Invalid, 1849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1169 Invalid, 0 Unknown, 621 Unchecked, 1.9s Time] [2022-12-14 04:42:47,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-12-14 04:42:47,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 155. [2022-12-14 04:42:47,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 129 states have (on average 1.5348837209302326) internal successors, (198), 145 states have internal predecessors, (198), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2022-12-14 04:42:47,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 218 transitions. [2022-12-14 04:42:47,694 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 218 transitions. Word has length 26 [2022-12-14 04:42:47,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:42:47,694 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 218 transitions. [2022-12-14 04:42:47,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 04:42:47,694 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 218 transitions. [2022-12-14 04:42:47,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 04:42:47,695 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:42:47,695 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:42:47,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-12-14 04:42:47,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2022-12-14 04:42:48,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 04:42:48,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:42:48,296 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:42:48,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:42:48,297 INFO L85 PathProgramCache]: Analyzing trace with hash 245332006, now seen corresponding path program 2 times [2022-12-14 04:42:48,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:42:48,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1461889446] [2022-12-14 04:42:48,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 04:42:48,297 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:42:48,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:42:48,298 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:42:48,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-12-14 04:42:48,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 04:42:48,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:42:48,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 04:42:48,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:42:48,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:42:49,012 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:42:49,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:42:51,375 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:42:51,376 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:42:51,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1461889446] [2022-12-14 04:42:51,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1461889446] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:42:51,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [555467197] [2022-12-14 04:42:51,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 04:42:51,376 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:42:51,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:42:51,377 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:42:51,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-12-14 04:42:51,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 04:42:51,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:42:51,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 04:42:51,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:42:51,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:42:51,678 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:42:51,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:42:52,445 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:42:52,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [555467197] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:42:52,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103794967] [2022-12-14 04:42:52,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 04:42:52,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:42:52,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:42:52,446 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:42:52,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 04:42:52,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 04:42:52,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:42:52,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 04:42:52,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:42:52,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:42:52,751 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:42:52,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:42:55,617 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:42:55,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103794967] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:42:55,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 04:42:55,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 15, 13, 15, 13] total 34 [2022-12-14 04:42:55,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591596154] [2022-12-14 04:42:55,618 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 04:42:55,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 04:42:55,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:42:55,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 04:42:55,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 04:42:55,620 INFO L87 Difference]: Start difference. First operand 155 states and 218 transitions. Second operand has 35 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 04:43:06,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:43:06,707 INFO L93 Difference]: Finished difference Result 191 states and 272 transitions. [2022-12-14 04:43:06,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-14 04:43:06,707 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-12-14 04:43:06,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:43:06,708 INFO L225 Difference]: With dead ends: 191 [2022-12-14 04:43:06,708 INFO L226 Difference]: Without dead ends: 191 [2022-12-14 04:43:06,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 114 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=900, Invalid=3132, Unknown=0, NotChecked=0, Total=4032 [2022-12-14 04:43:06,709 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 402 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-12-14 04:43:06,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 809 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-12-14 04:43:06,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-12-14 04:43:06,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 173. [2022-12-14 04:43:06,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 147 states have (on average 1.510204081632653) internal successors, (222), 163 states have internal predecessors, (222), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2022-12-14 04:43:06,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 242 transitions. [2022-12-14 04:43:06,713 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 242 transitions. Word has length 26 [2022-12-14 04:43:06,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:43:06,714 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 242 transitions. [2022-12-14 04:43:06,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 04:43:06,714 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 242 transitions. [2022-12-14 04:43:06,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 04:43:06,714 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:43:06,714 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 04:43:06,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2022-12-14 04:43:06,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-14 04:43:07,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-12-14 04:43:07,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:43:07,317 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:43:07,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:43:07,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1525074233, now seen corresponding path program 1 times [2022-12-14 04:43:07,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:43:07,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [191057503] [2022-12-14 04:43:07,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:43:07,319 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:43:07,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:43:07,322 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:43:07,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-12-14 04:43:07,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:43:07,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 04:43:07,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:43:07,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 04:43:07,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:43:07,417 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:43:07,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [191057503] [2022-12-14 04:43:07,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [191057503] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:43:07,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:43:07,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 04:43:07,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659721707] [2022-12-14 04:43:07,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:43:07,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 04:43:07,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:43:07,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 04:43:07,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 04:43:07,418 INFO L87 Difference]: Start difference. First operand 173 states and 242 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 04:43:07,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:43:07,459 INFO L93 Difference]: Finished difference Result 241 states and 330 transitions. [2022-12-14 04:43:07,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 04:43:07,459 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-12-14 04:43:07,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:43:07,460 INFO L225 Difference]: With dead ends: 241 [2022-12-14 04:43:07,460 INFO L226 Difference]: Without dead ends: 241 [2022-12-14 04:43:07,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 04:43:07,461 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 29 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:43:07,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 266 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 04:43:07,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-12-14 04:43:07,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 179. [2022-12-14 04:43:07,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 153 states have (on average 1.4836601307189543) internal successors, (227), 166 states have internal predecessors, (227), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2022-12-14 04:43:07,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 247 transitions. [2022-12-14 04:43:07,468 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 247 transitions. Word has length 28 [2022-12-14 04:43:07,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:43:07,468 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 247 transitions. [2022-12-14 04:43:07,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 04:43:07,468 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 247 transitions. [2022-12-14 04:43:07,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 04:43:07,469 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:43:07,469 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2022-12-14 04:43:07,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-12-14 04:43:07,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:43:07,670 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:43:07,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:43:07,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1027082728, now seen corresponding path program 1 times [2022-12-14 04:43:07,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:43:07,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940383012] [2022-12-14 04:43:07,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:43:07,673 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:43:07,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:43:07,675 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:43:07,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-12-14 04:43:07,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:43:07,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 04:43:07,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:43:07,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 04:43:07,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:43:07,746 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:43:07,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940383012] [2022-12-14 04:43:07,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940383012] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:43:07,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:43:07,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 04:43:07,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307890948] [2022-12-14 04:43:07,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:43:07,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 04:43:07,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:43:07,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 04:43:07,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 04:43:07,747 INFO L87 Difference]: Start difference. First operand 179 states and 247 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 04:43:07,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:43:07,812 INFO L93 Difference]: Finished difference Result 201 states and 262 transitions. [2022-12-14 04:43:07,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 04:43:07,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-12-14 04:43:07,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:43:07,813 INFO L225 Difference]: With dead ends: 201 [2022-12-14 04:43:07,813 INFO L226 Difference]: Without dead ends: 201 [2022-12-14 04:43:07,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 04:43:07,814 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 50 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:43:07,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 204 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:43:07,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-12-14 04:43:07,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 169. [2022-12-14 04:43:07,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 143 states have (on average 1.4545454545454546) internal successors, (208), 156 states have internal predecessors, (208), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2022-12-14 04:43:07,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 228 transitions. [2022-12-14 04:43:07,818 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 228 transitions. Word has length 28 [2022-12-14 04:43:07,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:43:07,819 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 228 transitions. [2022-12-14 04:43:07,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 04:43:07,819 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 228 transitions. [2022-12-14 04:43:07,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 04:43:07,820 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:43:07,820 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:43:07,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-12-14 04:43:08,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:43:08,021 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:43:08,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:43:08,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1822208300, now seen corresponding path program 2 times [2022-12-14 04:43:08,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:43:08,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [961841843] [2022-12-14 04:43:08,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 04:43:08,024 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:43:08,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:43:08,026 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:43:08,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-12-14 04:43:08,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 04:43:08,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:43:08,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 04:43:08,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:43:08,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:43:08,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:43:08,795 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_297 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_297) |c_#length|)))) is different from true [2022-12-14 04:43:08,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:43:08,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-12-14 04:43:08,833 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 04:43:08,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 04:43:08,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-14 04:43:08,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:43:13,372 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:43:13,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [961841843] [2022-12-14 04:43:13,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [961841843] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:43:13,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1935517449] [2022-12-14 04:43:13,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 04:43:13,372 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:43:13,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:43:13,373 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:43:13,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-12-14 04:43:13,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 04:43:13,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:43:13,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 04:43:13,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:43:13,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:43:13,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:43:13,742 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_319 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_319) |c_#length|)))) is different from true [2022-12-14 04:43:13,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:43:13,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-12-14 04:43:13,779 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 04:43:13,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 04:43:13,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-14 04:43:13,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:43:14,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1935517449] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:43:14,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384529231] [2022-12-14 04:43:14,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 04:43:14,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:43:14,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:43:14,107 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:43:14,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-14 04:43:14,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 04:43:14,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:43:14,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 04:43:14,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:43:14,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:43:14,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:43:14,399 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_341 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_341) |c_#length|)))) is different from true [2022-12-14 04:43:14,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:43:14,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-12-14 04:43:14,433 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 04:43:14,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 04:43:14,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-14 04:43:14,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:43:18,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384529231] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:43:18,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:43:18,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 19 [2022-12-14 04:43:18,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289871067] [2022-12-14 04:43:18,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:43:18,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 04:43:18,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:43:18,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 04:43:18,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=287, Unknown=4, NotChecked=108, Total=462 [2022-12-14 04:43:18,778 INFO L87 Difference]: Start difference. First operand 169 states and 228 transitions. Second operand has 20 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 19 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 04:43:20,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:43:20,858 INFO L93 Difference]: Finished difference Result 325 states and 404 transitions. [2022-12-14 04:43:20,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 04:43:20,859 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 19 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-12-14 04:43:20,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:43:20,859 INFO L225 Difference]: With dead ends: 325 [2022-12-14 04:43:20,860 INFO L226 Difference]: Without dead ends: 325 [2022-12-14 04:43:20,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 70 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=191, Invalid=873, Unknown=4, NotChecked=192, Total=1260 [2022-12-14 04:43:20,860 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 431 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 1623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 619 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 04:43:20,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 871 Invalid, 1623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 971 Invalid, 0 Unknown, 619 Unchecked, 1.5s Time] [2022-12-14 04:43:20,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-12-14 04:43:20,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 178. [2022-12-14 04:43:20,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 151 states have (on average 1.4370860927152318) internal successors, (217), 163 states have internal predecessors, (217), 8 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (15), 13 states have call predecessors, (15), 8 states have call successors, (15) [2022-12-14 04:43:20,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 240 transitions. [2022-12-14 04:43:20,866 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 240 transitions. Word has length 29 [2022-12-14 04:43:20,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:43:20,867 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 240 transitions. [2022-12-14 04:43:20,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 19 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 04:43:20,867 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 240 transitions. [2022-12-14 04:43:20,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 04:43:20,867 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:43:20,867 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-12-14 04:43:20,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-14 04:43:21,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2022-12-14 04:43:21,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-12-14 04:43:21,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:43:21,470 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:43:21,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:43:21,471 INFO L85 PathProgramCache]: Analyzing trace with hash -475836742, now seen corresponding path program 1 times [2022-12-14 04:43:21,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:43:21,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1848540642] [2022-12-14 04:43:21,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:43:21,473 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:43:21,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:43:21,475 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:43:21,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-12-14 04:43:21,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:43:21,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 04:43:21,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:43:21,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:43:21,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 04:43:21,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:43:21,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 04:43:21,778 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:43:21,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1848540642] [2022-12-14 04:43:21,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1848540642] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:43:21,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1078280599] [2022-12-14 04:43:21,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:43:21,778 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:43:21,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:43:21,779 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:43:21,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-12-14 04:43:21,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:43:21,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 04:43:21,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:43:21,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:43:21,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 04:43:21,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:43:21,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 04:43:21,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1078280599] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:43:21,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042065878] [2022-12-14 04:43:21,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:43:21,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:43:21,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:43:21,976 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:43:21,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-14 04:43:22,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:43:22,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 04:43:22,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:43:22,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:43:22,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 04:43:22,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:43:22,140 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 04:43:22,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042065878] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:43:22,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 04:43:22,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 7 [2022-12-14 04:43:22,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250694281] [2022-12-14 04:43:22,140 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 04:43:22,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 04:43:22,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:43:22,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 04:43:22,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 04:43:22,141 INFO L87 Difference]: Start difference. First operand 178 states and 240 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 04:43:22,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:43:22,356 INFO L93 Difference]: Finished difference Result 204 states and 271 transitions. [2022-12-14 04:43:22,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 04:43:22,357 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-12-14 04:43:22,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:43:22,357 INFO L225 Difference]: With dead ends: 204 [2022-12-14 04:43:22,358 INFO L226 Difference]: Without dead ends: 204 [2022-12-14 04:43:22,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 172 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-12-14 04:43:22,358 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 48 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 04:43:22,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 279 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 04:43:22,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-12-14 04:43:22,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 180. [2022-12-14 04:43:22,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 153 states have (on average 1.4379084967320261) internal successors, (220), 165 states have internal predecessors, (220), 8 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (15), 13 states have call predecessors, (15), 8 states have call successors, (15) [2022-12-14 04:43:22,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 243 transitions. [2022-12-14 04:43:22,361 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 243 transitions. Word has length 31 [2022-12-14 04:43:22,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:43:22,361 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 243 transitions. [2022-12-14 04:43:22,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 04:43:22,362 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 243 transitions. [2022-12-14 04:43:22,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 04:43:22,362 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:43:22,362 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-12-14 04:43:22,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-12-14 04:43:22,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-14 04:43:22,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-12-14 04:43:22,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:43:22,965 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:43:22,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:43:22,966 INFO L85 PathProgramCache]: Analyzing trace with hash -475836741, now seen corresponding path program 1 times [2022-12-14 04:43:22,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:43:22,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [304187017] [2022-12-14 04:43:22,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:43:22,967 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:43:22,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:43:22,970 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:43:22,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-12-14 04:43:23,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:43:23,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 04:43:23,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:43:23,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:43:23,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:43:23,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:43:24,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:43:24,468 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:43:24,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [304187017] [2022-12-14 04:43:24,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [304187017] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:43:24,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2092203104] [2022-12-14 04:43:24,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:43:24,469 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:43:24,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:43:24,469 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:43:24,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-12-14 04:43:24,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:43:24,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 04:43:24,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:43:24,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:43:25,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:43:25,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:43:27,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:43:27,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2092203104] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:43:27,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645170900] [2022-12-14 04:43:27,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:43:27,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:43:27,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:43:27,341 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:43:27,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-14 04:43:27,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:43:27,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 04:43:27,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:43:27,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:43:27,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:43:27,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:43:28,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:43:28,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645170900] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:43:28,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 04:43:28,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 13, 11, 13, 11] total 31 [2022-12-14 04:43:28,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367492891] [2022-12-14 04:43:28,447 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 04:43:28,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 04:43:28,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:43:28,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 04:43:28,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2022-12-14 04:43:28,449 INFO L87 Difference]: Start difference. First operand 180 states and 243 transitions. Second operand has 32 states, 30 states have (on average 2.566666666666667) internal successors, (77), 28 states have internal predecessors, (77), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-14 04:43:36,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:43:36,007 INFO L93 Difference]: Finished difference Result 419 states and 506 transitions. [2022-12-14 04:43:36,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 04:43:36,009 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.566666666666667) internal successors, (77), 28 states have internal predecessors, (77), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) Word has length 31 [2022-12-14 04:43:36,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:43:36,009 INFO L225 Difference]: With dead ends: 419 [2022-12-14 04:43:36,010 INFO L226 Difference]: Without dead ends: 419 [2022-12-14 04:43:36,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 147 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=467, Invalid=2289, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 04:43:36,010 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 861 mSDsluCounter, 1654 mSDsCounter, 0 mSdLazyCounter, 1455 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 1776 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-12-14 04:43:36,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [861 Valid, 1776 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1455 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-12-14 04:43:36,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-12-14 04:43:36,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 205. [2022-12-14 04:43:36,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 177 states have (on average 1.4519774011299436) internal successors, (257), 189 states have internal predecessors, (257), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (17), 14 states have call predecessors, (17), 9 states have call successors, (17) [2022-12-14 04:43:36,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 283 transitions. [2022-12-14 04:43:36,018 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 283 transitions. Word has length 31 [2022-12-14 04:43:36,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:43:36,018 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 283 transitions. [2022-12-14 04:43:36,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.566666666666667) internal successors, (77), 28 states have internal predecessors, (77), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-14 04:43:36,018 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 283 transitions. [2022-12-14 04:43:36,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-14 04:43:36,019 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:43:36,019 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2022-12-14 04:43:36,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-12-14 04:43:36,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-12-14 04:43:36,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-12-14 04:43:36,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:43:36,621 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:43:36,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:43:36,622 INFO L85 PathProgramCache]: Analyzing trace with hash 818465469, now seen corresponding path program 1 times [2022-12-14 04:43:36,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:43:36,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1066799304] [2022-12-14 04:43:36,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:43:36,624 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:43:36,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:43:36,627 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:43:36,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-12-14 04:43:36,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:43:36,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 04:43:36,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:43:36,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 04:43:36,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:43:37,005 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:43:37,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-12-14 04:43:37,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 04:43:37,324 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:43:37,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1066799304] [2022-12-14 04:43:37,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1066799304] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:43:37,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [578411616] [2022-12-14 04:43:37,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:43:37,324 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:43:37,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:43:37,325 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:43:37,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-12-14 04:43:37,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:43:37,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 04:43:37,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:43:37,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 04:43:37,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:43:37,609 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:43:37,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-12-14 04:43:37,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 04:43:37,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [578411616] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:43:37,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411398702] [2022-12-14 04:43:37,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:43:37,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:43:37,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:43:37,754 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:43:37,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-14 04:43:37,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:43:37,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 04:43:37,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:43:37,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 04:43:37,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:43:37,980 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:43:37,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-12-14 04:43:38,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 04:43:38,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411398702] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:43:38,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 04:43:38,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 13 [2022-12-14 04:43:38,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339103042] [2022-12-14 04:43:38,170 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 04:43:38,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 04:43:38,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:43:38,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 04:43:38,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-12-14 04:43:38,170 INFO L87 Difference]: Start difference. First operand 205 states and 283 transitions. Second operand has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 04:43:39,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:43:39,820 INFO L93 Difference]: Finished difference Result 457 states and 602 transitions. [2022-12-14 04:43:39,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 04:43:39,821 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2022-12-14 04:43:39,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:43:39,822 INFO L225 Difference]: With dead ends: 457 [2022-12-14 04:43:39,822 INFO L226 Difference]: Without dead ends: 457 [2022-12-14 04:43:39,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2022-12-14 04:43:39,822 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 442 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 04:43:39,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [443 Valid, 534 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 04:43:39,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-12-14 04:43:39,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 166. [2022-12-14 04:43:39,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 141 states have (on average 1.425531914893617) internal successors, (201), 154 states have internal predecessors, (201), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2022-12-14 04:43:39,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 221 transitions. [2022-12-14 04:43:39,827 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 221 transitions. Word has length 32 [2022-12-14 04:43:39,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:43:39,827 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 221 transitions. [2022-12-14 04:43:39,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 04:43:39,827 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 221 transitions. [2022-12-14 04:43:39,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-14 04:43:39,828 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:43:39,828 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:43:39,837 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-12-14 04:43:40,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-12-14 04:43:40,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2022-12-14 04:43:40,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 04:43:40,430 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:43:40,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:43:40,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1191141044, now seen corresponding path program 3 times [2022-12-14 04:43:40,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:43:40,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [496071048] [2022-12-14 04:43:40,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 04:43:40,433 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:43:40,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:43:40,434 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:43:40,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-12-14 04:43:40,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 04:43:40,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:43:40,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 04:43:40,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:43:40,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:43:40,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:43:40,834 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_477 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_477) |c_#length|)))) is different from true [2022-12-14 04:43:40,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:43:40,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 04:43:40,864 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 04:43:40,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 04:43:40,914 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 2 not checked. [2022-12-14 04:43:40,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:43:43,453 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:43:43,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [496071048] [2022-12-14 04:43:43,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [496071048] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:43:43,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1730849504] [2022-12-14 04:43:43,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 04:43:43,454 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:43:43,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:43:43,455 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:43:43,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-12-14 04:43:43,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 04:43:43,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:43:43,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 04:43:43,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:43:43,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:43:43,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:43:43,767 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_505 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_505) |c_#length|)))) is different from true [2022-12-14 04:43:43,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:43:43,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 04:43:43,795 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 04:43:43,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 04:43:43,822 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 2 not checked. [2022-12-14 04:43:43,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:43:46,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1730849504] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:43:46,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821546483] [2022-12-14 04:43:46,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 04:43:46,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:43:46,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:43:46,067 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:43:46,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-14 04:43:46,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 04:43:46,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:43:46,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 04:43:46,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:43:46,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:43:46,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:43:46,361 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_533 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_533) |c_#length|)))) is different from true [2022-12-14 04:43:46,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:43:46,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 04:43:46,384 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 04:43:46,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 04:43:46,418 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 2 not checked. [2022-12-14 04:43:46,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:43:47,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821546483] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:43:47,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:43:47,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 14 [2022-12-14 04:43:47,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920237058] [2022-12-14 04:43:47,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:43:47,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 04:43:47,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:43:47,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 04:43:47,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=155, Unknown=3, NotChecked=78, Total=272 [2022-12-14 04:43:47,503 INFO L87 Difference]: Start difference. First operand 166 states and 221 transitions. Second operand has 15 states, 13 states have (on average 2.0) internal successors, (26), 14 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 04:43:48,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:43:48,644 INFO L93 Difference]: Finished difference Result 219 states and 272 transitions. [2022-12-14 04:43:48,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 04:43:48,645 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.0) internal successors, (26), 14 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-12-14 04:43:48,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:43:48,646 INFO L225 Difference]: With dead ends: 219 [2022-12-14 04:43:48,646 INFO L226 Difference]: Without dead ends: 219 [2022-12-14 04:43:48,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=106, Invalid=409, Unknown=3, NotChecked=132, Total=650 [2022-12-14 04:43:48,647 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 332 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 375 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 04:43:48,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 410 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 404 Invalid, 0 Unknown, 375 Unchecked, 0.8s Time] [2022-12-14 04:43:48,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-12-14 04:43:48,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 157. [2022-12-14 04:43:48,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 133 states have (on average 1.4285714285714286) internal successors, (190), 147 states have internal predecessors, (190), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2022-12-14 04:43:48,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 207 transitions. [2022-12-14 04:43:48,650 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 207 transitions. Word has length 32 [2022-12-14 04:43:48,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:43:48,650 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 207 transitions. [2022-12-14 04:43:48,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.0) internal successors, (26), 14 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 04:43:48,650 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 207 transitions. [2022-12-14 04:43:48,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 04:43:48,650 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:43:48,650 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-12-14 04:43:48,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-12-14 04:43:48,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2022-12-14 04:43:49,057 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-12-14 04:43:49,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:43:49,252 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:43:49,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:43:49,252 INFO L85 PathProgramCache]: Analyzing trace with hash -397374190, now seen corresponding path program 1 times [2022-12-14 04:43:49,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:43:49,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2115083161] [2022-12-14 04:43:49,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:43:49,252 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:43:49,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:43:49,253 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:43:49,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-12-14 04:43:49,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:43:49,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 04:43:49,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:43:49,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 treesize of output 7 [2022-12-14 04:43:49,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 04:43:49,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 04:43:49,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:43:49,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-12-14 04:43:49,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 04:43:49,666 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:43:49,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2115083161] [2022-12-14 04:43:49,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2115083161] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:43:49,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1768224618] [2022-12-14 04:43:49,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:43:49,666 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:43:49,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:43:49,667 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:43:49,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-12-14 04:43:49,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:43:49,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 04:43:49,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:43:49,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 treesize of output 7 [2022-12-14 04:43:50,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 04:43:50,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 04:43:50,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:43:50,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-12-14 04:43:50,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 04:43:50,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1768224618] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:43:50,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671835430] [2022-12-14 04:43:50,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:43:50,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:43:50,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:43:50,171 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:43:50,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-12-14 04:43:50,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:43:50,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 04:43:50,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:43:50,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 treesize of output 7 [2022-12-14 04:43:50,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 04:43:50,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 04:43:50,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:43:50,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-12-14 04:43:50,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 04:43:50,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671835430] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:43:50,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 04:43:50,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 10, 8, 10, 8] total 19 [2022-12-14 04:43:50,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088792491] [2022-12-14 04:43:50,417 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 04:43:50,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 04:43:50,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:43:50,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 04:43:50,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-12-14 04:43:50,419 INFO L87 Difference]: Start difference. First operand 157 states and 207 transitions. Second operand has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 16 states have internal predecessors, (53), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-14 04:43:51,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:43:51,003 INFO L93 Difference]: Finished difference Result 254 states and 311 transitions. [2022-12-14 04:43:51,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 04:43:51,004 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 16 states have internal predecessors, (53), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 33 [2022-12-14 04:43:51,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:43:51,004 INFO L225 Difference]: With dead ends: 254 [2022-12-14 04:43:51,004 INFO L226 Difference]: Without dead ends: 254 [2022-12-14 04:43:51,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2022-12-14 04:43:51,005 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 195 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 04:43:51,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 545 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 04:43:51,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-12-14 04:43:51,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 177. [2022-12-14 04:43:51,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 153 states have (on average 1.457516339869281) internal successors, (223), 166 states have internal predecessors, (223), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2022-12-14 04:43:51,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 240 transitions. [2022-12-14 04:43:51,008 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 240 transitions. Word has length 33 [2022-12-14 04:43:51,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:43:51,009 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 240 transitions. [2022-12-14 04:43:51,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 16 states have internal predecessors, (53), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-14 04:43:51,009 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 240 transitions. [2022-12-14 04:43:51,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 04:43:51,009 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:43:51,009 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2022-12-14 04:43:51,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-12-14 04:43:51,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2022-12-14 04:43:51,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-12-14 04:43:51,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:43:51,612 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:43:51,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:43:51,613 INFO L85 PathProgramCache]: Analyzing trace with hash -2012618870, now seen corresponding path program 1 times [2022-12-14 04:43:51,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:43:51,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [418972876] [2022-12-14 04:43:51,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:43:51,614 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:43:51,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:43:51,617 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:43:51,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-12-14 04:43:51,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:43:51,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 04:43:51,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:43:51,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 04:43:51,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:43:51,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 04:43:51,963 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:43:51,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [418972876] [2022-12-14 04:43:51,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [418972876] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:43:51,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [134770953] [2022-12-14 04:43:51,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:43:51,963 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:43:51,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:43:51,964 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:43:51,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-12-14 04:43:52,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:43:52,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 04:43:52,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:43:52,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 04:43:52,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:43:52,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 04:43:52,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [134770953] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:43:52,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693066940] [2022-12-14 04:43:52,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:43:52,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:43:52,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:43:52,162 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:43:52,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-12-14 04:43:52,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:43:52,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 04:43:52,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:43:52,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 04:43:52,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:43:52,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 04:43:52,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693066940] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:43:52,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 04:43:52,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 4, 9, 7] total 21 [2022-12-14 04:43:52,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429471430] [2022-12-14 04:43:52,538 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 04:43:52,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 04:43:52,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:43:52,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 04:43:52,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-12-14 04:43:52,540 INFO L87 Difference]: Start difference. First operand 177 states and 240 transitions. Second operand has 21 states, 21 states have (on average 4.571428571428571) internal successors, (96), 19 states have internal predecessors, (96), 7 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-12-14 04:43:53,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:43:53,372 INFO L93 Difference]: Finished difference Result 313 states and 414 transitions. [2022-12-14 04:43:53,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 04:43:53,373 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.571428571428571) internal successors, (96), 19 states have internal predecessors, (96), 7 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) Word has length 33 [2022-12-14 04:43:53,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:43:53,374 INFO L225 Difference]: With dead ends: 313 [2022-12-14 04:43:53,374 INFO L226 Difference]: Without dead ends: 311 [2022-12-14 04:43:53,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 172 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=252, Invalid=804, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 04:43:53,374 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 677 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 04:43:53,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [677 Valid, 421 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 04:43:53,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-12-14 04:43:53,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 175. [2022-12-14 04:43:53,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 152 states have (on average 1.4078947368421053) internal successors, (214), 163 states have internal predecessors, (214), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2022-12-14 04:43:53,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 231 transitions. [2022-12-14 04:43:53,378 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 231 transitions. Word has length 33 [2022-12-14 04:43:53,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:43:53,378 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 231 transitions. [2022-12-14 04:43:53,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.571428571428571) internal successors, (96), 19 states have internal predecessors, (96), 7 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-12-14 04:43:53,379 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 231 transitions. [2022-12-14 04:43:53,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 04:43:53,379 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:43:53,379 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2022-12-14 04:43:53,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-12-14 04:43:53,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (46)] Ended with exit code 0 [2022-12-14 04:43:53,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-12-14 04:43:53,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:43:53,982 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:43:53,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:43:53,983 INFO L85 PathProgramCache]: Analyzing trace with hash -2012573126, now seen corresponding path program 1 times [2022-12-14 04:43:53,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:43:53,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1449503333] [2022-12-14 04:43:53,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:43:53,984 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:43:53,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:43:53,987 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:43:53,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-12-14 04:43:54,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:43:54,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 04:43:54,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:43:54,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 treesize of output 7 [2022-12-14 04:43:54,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 04:43:54,232 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:43:54,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:43:54,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-14 04:43:54,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-12-14 04:43:54,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 04:43:54,367 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:43:54,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1449503333] [2022-12-14 04:43:54,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1449503333] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:43:54,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1385402339] [2022-12-14 04:43:54,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:43:54,367 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:43:54,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:43:54,368 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:43:54,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-12-14 04:43:54,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:43:54,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 04:43:54,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:43:54,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 04:43:54,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 04:43:54,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:43:54,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:43:54,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-14 04:43:54,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-12-14 04:43:55,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 04:43:55,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1385402339] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:43:55,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245316534] [2022-12-14 04:43:55,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:43:55,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:43:55,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:43:55,024 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:43:55,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-12-14 04:43:55,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:43:55,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 04:43:55,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:43:55,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 treesize of output 7 [2022-12-14 04:43:55,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 04:43:55,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:43:55,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:43:55,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-14 04:43:55,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-12-14 04:43:55,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 04:43:55,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245316534] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:43:55,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 04:43:55,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 9, 6, 9, 6] total 26 [2022-12-14 04:43:55,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875458421] [2022-12-14 04:43:55,538 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 04:43:55,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 04:43:55,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:43:55,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 04:43:55,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-12-14 04:43:55,539 INFO L87 Difference]: Start difference. First operand 175 states and 231 transitions. Second operand has 27 states, 26 states have (on average 3.8461538461538463) internal successors, (100), 25 states have internal predecessors, (100), 6 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-12-14 04:43:57,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:43:59,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:44:02,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:44:04,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:44:06,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:44:06,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:44:06,717 INFO L93 Difference]: Finished difference Result 249 states and 316 transitions. [2022-12-14 04:44:06,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 04:44:06,718 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.8461538461538463) internal successors, (100), 25 states have internal predecessors, (100), 6 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 33 [2022-12-14 04:44:06,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:44:06,718 INFO L225 Difference]: With dead ends: 249 [2022-12-14 04:44:06,718 INFO L226 Difference]: Without dead ends: 249 [2022-12-14 04:44:06,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 164 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 04:44:06,719 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 292 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 12 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2022-12-14 04:44:06,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 562 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 450 Invalid, 5 Unknown, 0 Unchecked, 10.8s Time] [2022-12-14 04:44:06,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-12-14 04:44:06,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 188. [2022-12-14 04:44:06,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 163 states have (on average 1.3865030674846626) internal successors, (226), 175 states have internal predecessors, (226), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2022-12-14 04:44:06,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 243 transitions. [2022-12-14 04:44:06,725 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 243 transitions. Word has length 33 [2022-12-14 04:44:06,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:44:06,725 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 243 transitions. [2022-12-14 04:44:06,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.8461538461538463) internal successors, (100), 25 states have internal predecessors, (100), 6 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-12-14 04:44:06,725 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 243 transitions. [2022-12-14 04:44:06,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 04:44:06,726 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:44:06,726 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2022-12-14 04:44:06,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-12-14 04:44:06,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (49)] Ended with exit code 0 [2022-12-14 04:44:07,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Ended with exit code 0 [2022-12-14 04:44:07,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:44:07,328 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:44:07,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:44:07,329 INFO L85 PathProgramCache]: Analyzing trace with hash 566302140, now seen corresponding path program 1 times [2022-12-14 04:44:07,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:44:07,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1220098583] [2022-12-14 04:44:07,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:07,329 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:44:07,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:44:07,331 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:44:07,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-12-14 04:44:07,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:07,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 04:44:07,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:44:07,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 treesize of output 7 [2022-12-14 04:44:07,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 04:44:07,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 04:44:07,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:44:07,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-12-14 04:44:08,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 04:44:08,173 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:44:08,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1220098583] [2022-12-14 04:44:08,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1220098583] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:44:08,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1407189244] [2022-12-14 04:44:08,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:08,174 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:44:08,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:44:08,175 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:44:08,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-12-14 04:44:08,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:08,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 04:44:08,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:44:08,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 treesize of output 7 [2022-12-14 04:44:08,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 04:44:08,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 04:44:08,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:44:08,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-12-14 04:44:08,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 04:44:08,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1407189244] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:44:08,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864387647] [2022-12-14 04:44:08,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:08,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:44:08,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:44:08,926 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:44:08,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-12-14 04:44:09,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:09,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 04:44:09,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:44:09,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 treesize of output 7 [2022-12-14 04:44:09,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 04:44:09,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 04:44:09,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:44:09,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-12-14 04:44:09,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 04:44:09,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864387647] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:44:09,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 04:44:09,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11, 8, 11, 8] total 26 [2022-12-14 04:44:09,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713957127] [2022-12-14 04:44:09,219 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 04:44:09,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 04:44:09,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:44:09,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 04:44:09,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2022-12-14 04:44:09,221 INFO L87 Difference]: Start difference. First operand 188 states and 243 transitions. Second operand has 27 states, 26 states have (on average 3.076923076923077) internal successors, (80), 23 states have internal predecessors, (80), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-12-14 04:44:11,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:44:11,006 INFO L93 Difference]: Finished difference Result 240 states and 287 transitions. [2022-12-14 04:44:11,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 04:44:11,007 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.076923076923077) internal successors, (80), 23 states have internal predecessors, (80), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 34 [2022-12-14 04:44:11,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:44:11,007 INFO L225 Difference]: With dead ends: 240 [2022-12-14 04:44:11,008 INFO L226 Difference]: Without dead ends: 240 [2022-12-14 04:44:11,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=264, Invalid=1296, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 04:44:11,008 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 430 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 04:44:11,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 618 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 04:44:11,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-12-14 04:44:11,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 189. [2022-12-14 04:44:11,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 164 states have (on average 1.3841463414634145) internal successors, (227), 176 states have internal predecessors, (227), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2022-12-14 04:44:11,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 244 transitions. [2022-12-14 04:44:11,012 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 244 transitions. Word has length 34 [2022-12-14 04:44:11,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:44:11,013 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 244 transitions. [2022-12-14 04:44:11,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.076923076923077) internal successors, (80), 23 states have internal predecessors, (80), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-12-14 04:44:11,013 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 244 transitions. [2022-12-14 04:44:11,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 04:44:11,013 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:44:11,013 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2022-12-14 04:44:11,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (52)] Ended with exit code 0 [2022-12-14 04:44:11,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-12-14 04:44:11,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Ended with exit code 0 [2022-12-14 04:44:11,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:44:11,616 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:44:11,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:44:11,617 INFO L85 PathProgramCache]: Analyzing trace with hash 375497300, now seen corresponding path program 1 times [2022-12-14 04:44:11,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:44:11,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1517976197] [2022-12-14 04:44:11,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:11,618 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:44:11,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:44:11,619 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:44:11,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-12-14 04:44:11,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:11,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 04:44:11,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:44:11,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:44:11,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 treesize of output 7 [2022-12-14 04:44:11,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 04:44:11,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 04:44:11,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:44:11,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2022-12-14 04:44:12,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 04:44:12,183 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:44:12,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1517976197] [2022-12-14 04:44:12,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1517976197] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:44:12,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1977224609] [2022-12-14 04:44:12,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:12,183 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:44:12,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:44:12,184 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:44:12,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2022-12-14 04:44:12,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:12,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 04:44:12,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:44:12,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:44:12,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 treesize of output 7 [2022-12-14 04:44:12,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 04:44:12,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 04:44:12,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:44:12,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2022-12-14 04:44:12,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 04:44:12,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1977224609] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:44:12,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009523663] [2022-12-14 04:44:12,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:12,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:44:12,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:44:12,821 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:44:12,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-12-14 04:44:12,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:12,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 04:44:12,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:44:12,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:44:12,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 treesize of output 7 [2022-12-14 04:44:13,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 04:44:13,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 04:44:13,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:44:13,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2022-12-14 04:44:13,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 04:44:13,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009523663] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:44:13,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 04:44:13,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11, 8, 11, 8] total 20 [2022-12-14 04:44:13,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306737057] [2022-12-14 04:44:13,186 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 04:44:13,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 04:44:13,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:44:13,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 04:44:13,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-12-14 04:44:13,188 INFO L87 Difference]: Start difference. First operand 189 states and 244 transitions. Second operand has 21 states, 20 states have (on average 2.85) internal successors, (57), 17 states have internal predecessors, (57), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-14 04:44:13,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:44:13,851 INFO L93 Difference]: Finished difference Result 215 states and 270 transitions. [2022-12-14 04:44:13,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 04:44:13,852 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 17 states have internal predecessors, (57), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 35 [2022-12-14 04:44:13,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:44:13,853 INFO L225 Difference]: With dead ends: 215 [2022-12-14 04:44:13,853 INFO L226 Difference]: Without dead ends: 215 [2022-12-14 04:44:13,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 180 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-12-14 04:44:13,853 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 180 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 04:44:13,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 497 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 04:44:13,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-12-14 04:44:13,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 190. [2022-12-14 04:44:13,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 165 states have (on average 1.3818181818181818) internal successors, (228), 177 states have internal predecessors, (228), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2022-12-14 04:44:13,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 245 transitions. [2022-12-14 04:44:13,859 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 245 transitions. Word has length 35 [2022-12-14 04:44:13,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:44:13,859 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 245 transitions. [2022-12-14 04:44:13,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 17 states have internal predecessors, (57), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-14 04:44:13,859 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 245 transitions. [2022-12-14 04:44:13,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 04:44:13,860 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:44:13,860 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:44:13,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-12-14 04:44:14,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-12-14 04:44:14,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (55)] Ended with exit code 0 [2022-12-14 04:44:14,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 04:44:14,462 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:44:14,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:44:14,464 INFO L85 PathProgramCache]: Analyzing trace with hash -2027972411, now seen corresponding path program 1 times [2022-12-14 04:44:14,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:44:14,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780354150] [2022-12-14 04:44:14,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:14,465 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:44:14,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:44:14,467 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:44:14,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-12-14 04:44:14,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:14,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 04:44:14,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:44:14,742 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 04:44:14,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:44:14,960 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 04:44:14,960 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:44:14,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780354150] [2022-12-14 04:44:14,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [780354150] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:44:14,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1641214561] [2022-12-14 04:44:14,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:14,960 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:44:14,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:44:14,961 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:44:14,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-12-14 04:44:15,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:15,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 04:44:15,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:44:15,143 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 04:44:15,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:44:15,192 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 04:44:15,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1641214561] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:44:15,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957311856] [2022-12-14 04:44:15,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:15,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:44:15,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:44:15,193 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:44:15,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-12-14 04:44:15,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:15,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 04:44:15,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:44:15,341 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 04:44:15,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:44:15,386 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 04:44:15,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957311856] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:44:15,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 04:44:15,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 10, 7, 10, 7] total 16 [2022-12-14 04:44:15,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137808519] [2022-12-14 04:44:15,387 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 04:44:15,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 04:44:15,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:44:15,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 04:44:15,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-12-14 04:44:15,388 INFO L87 Difference]: Start difference. First operand 190 states and 245 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-14 04:44:15,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:44:15,940 INFO L93 Difference]: Finished difference Result 299 states and 358 transitions. [2022-12-14 04:44:15,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 04:44:15,941 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 36 [2022-12-14 04:44:15,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:44:15,942 INFO L225 Difference]: With dead ends: 299 [2022-12-14 04:44:15,942 INFO L226 Difference]: Without dead ends: 299 [2022-12-14 04:44:15,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2022-12-14 04:44:15,942 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 578 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 04:44:15,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [578 Valid, 484 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 04:44:15,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-12-14 04:44:15,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 203. [2022-12-14 04:44:15,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 177 states have (on average 1.3615819209039548) internal successors, (241), 188 states have internal predecessors, (241), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2022-12-14 04:44:15,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 261 transitions. [2022-12-14 04:44:15,946 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 261 transitions. Word has length 36 [2022-12-14 04:44:15,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:44:15,946 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 261 transitions. [2022-12-14 04:44:15,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-14 04:44:15,946 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 261 transitions. [2022-12-14 04:44:15,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 04:44:15,946 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:44:15,947 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:44:15,954 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Ended with exit code 0 [2022-12-14 04:44:16,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-12-14 04:44:16,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (58)] Ended with exit code 0 [2022-12-14 04:44:16,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 04:44:16,549 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:44:16,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:44:16,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1883049109, now seen corresponding path program 1 times [2022-12-14 04:44:16,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:44:16,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [458027890] [2022-12-14 04:44:16,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:16,551 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:44:16,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:44:16,554 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:44:16,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-12-14 04:44:16,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:16,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 04:44:16,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:44:16,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 04:44:16,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 04:44:16,674 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:44:16,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [458027890] [2022-12-14 04:44:16,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [458027890] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:44:16,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:44:16,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 04:44:16,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925245522] [2022-12-14 04:44:16,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:44:16,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 04:44:16,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:44:16,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 04:44:16,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 04:44:16,675 INFO L87 Difference]: Start difference. First operand 203 states and 261 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 04:44:16,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:44:16,693 INFO L93 Difference]: Finished difference Result 195 states and 231 transitions. [2022-12-14 04:44:16,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 04:44:16,695 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2022-12-14 04:44:16,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:44:16,695 INFO L225 Difference]: With dead ends: 195 [2022-12-14 04:44:16,695 INFO L226 Difference]: Without dead ends: 195 [2022-12-14 04:44:16,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 04:44:16,696 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 37 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:44:16,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 245 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 04:44:16,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-12-14 04:44:16,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 165. [2022-12-14 04:44:16,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 141 states have (on average 1.3191489361702127) internal successors, (186), 153 states have internal predecessors, (186), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2022-12-14 04:44:16,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 200 transitions. [2022-12-14 04:44:16,699 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 200 transitions. Word has length 35 [2022-12-14 04:44:16,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:44:16,699 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 200 transitions. [2022-12-14 04:44:16,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 04:44:16,699 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 200 transitions. [2022-12-14 04:44:16,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 04:44:16,699 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:44:16,700 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:44:16,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Ended with exit code 0 [2022-12-14 04:44:16,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:44:16,901 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:44:16,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:44:16,902 INFO L85 PathProgramCache]: Analyzing trace with hash 2145816479, now seen corresponding path program 1 times [2022-12-14 04:44:16,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:44:16,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1347331580] [2022-12-14 04:44:16,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:16,904 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:44:16,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:44:16,907 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:44:16,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-12-14 04:44:17,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:17,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 04:44:17,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:44:17,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 04:44:17,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:44:17,393 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 04:44:17,393 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:44:17,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1347331580] [2022-12-14 04:44:17,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1347331580] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:44:17,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1516621751] [2022-12-14 04:44:17,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:17,394 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:44:17,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:44:17,394 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:44:17,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2022-12-14 04:44:17,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:17,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 04:44:17,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:44:17,619 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 04:44:17,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:44:17,676 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 04:44:17,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1516621751] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:44:17,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79523603] [2022-12-14 04:44:17,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:17,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:44:17,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:44:17,677 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:44:17,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-12-14 04:44:17,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:17,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 04:44:17,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:44:17,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 04:44:18,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 04:44:18,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 04:44:18,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:44:18,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:44:20,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2022-12-14 04:44:20,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-14 04:44:20,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-12-14 04:44:20,587 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 04:44:20,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79523603] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:44:20,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 04:44:20,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 10, 7, 10, 9] total 33 [2022-12-14 04:44:20,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003997858] [2022-12-14 04:44:20,588 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 04:44:20,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-14 04:44:20,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:44:20,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-14 04:44:20,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=949, Unknown=1, NotChecked=0, Total=1056 [2022-12-14 04:44:20,590 INFO L87 Difference]: Start difference. First operand 165 states and 200 transitions. Second operand has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 31 states have internal predecessors, (108), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-12-14 04:44:23,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:44:26,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:44:28,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:44:28,134 INFO L93 Difference]: Finished difference Result 243 states and 277 transitions. [2022-12-14 04:44:28,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-14 04:44:28,135 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 31 states have internal predecessors, (108), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 37 [2022-12-14 04:44:28,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:44:28,136 INFO L225 Difference]: With dead ends: 243 [2022-12-14 04:44:28,136 INFO L226 Difference]: Without dead ends: 243 [2022-12-14 04:44:28,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=796, Invalid=3625, Unknown=1, NotChecked=0, Total=4422 [2022-12-14 04:44:28,137 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 718 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 44 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-12-14 04:44:28,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [718 Valid, 699 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 509 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2022-12-14 04:44:28,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-12-14 04:44:28,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 187. [2022-12-14 04:44:28,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 163 states have (on average 1.2822085889570551) internal successors, (209), 174 states have internal predecessors, (209), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) [2022-12-14 04:44:28,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 223 transitions. [2022-12-14 04:44:28,140 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 223 transitions. Word has length 37 [2022-12-14 04:44:28,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:44:28,140 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 223 transitions. [2022-12-14 04:44:28,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 31 states have internal predecessors, (108), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-12-14 04:44:28,140 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 223 transitions. [2022-12-14 04:44:28,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 04:44:28,141 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:44:28,141 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:44:28,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-12-14 04:44:28,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (62)] Ended with exit code 0 [2022-12-14 04:44:28,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Ended with exit code 0 [2022-12-14 04:44:28,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:44:28,743 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:44:28,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:44:28,744 INFO L85 PathProgramCache]: Analyzing trace with hash 731071653, now seen corresponding path program 2 times [2022-12-14 04:44:28,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:44:28,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1801763294] [2022-12-14 04:44:28,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 04:44:28,746 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:44:28,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:44:28,747 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:44:28,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-12-14 04:44:28,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 04:44:28,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:44:28,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-14 04:44:28,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:44:28,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:44:28,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:44:29,437 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_883 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_883) |c_#length|)))) is different from true [2022-12-14 04:44:29,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:44:29,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-12-14 04:44:29,463 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 04:44:29,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 04:44:29,714 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_884 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_884) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-12-14 04:44:29,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:44:29,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-12-14 04:44:29,741 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 04:44:29,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 04:44:29,847 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 6 not checked. [2022-12-14 04:44:29,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:44:32,304 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:44:32,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1801763294] [2022-12-14 04:44:32,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1801763294] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:44:32,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1191876508] [2022-12-14 04:44:32,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 04:44:32,304 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:44:32,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:44:32,305 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:44:32,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2022-12-14 04:44:32,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 04:44:32,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:44:32,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-14 04:44:32,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:44:32,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:44:32,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:44:32,732 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_914 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_914) |c_#length|)))) is different from true [2022-12-14 04:44:32,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:44:32,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-12-14 04:44:32,757 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 04:44:32,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 04:44:32,916 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_915 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_915) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-12-14 04:44:32,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:44:32,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-12-14 04:44:32,945 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 04:44:32,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 04:44:32,982 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 6 not checked. [2022-12-14 04:44:32,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:44:33,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1191876508] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:44:33,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372587499] [2022-12-14 04:44:33,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 04:44:33,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:44:33,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:44:33,807 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:44:33,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-12-14 04:44:33,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 04:44:33,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:44:33,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-14 04:44:33,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:44:33,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:44:33,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:44:34,206 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_945 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_945) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-12-14 04:44:34,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:44:34,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-12-14 04:44:34,227 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 04:44:34,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 04:44:34,395 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_946 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_946) |c_#length|)))) is different from true [2022-12-14 04:44:34,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:44:34,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-12-14 04:44:34,417 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 04:44:34,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 04:44:34,455 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 6 not checked. [2022-12-14 04:44:34,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:44:34,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372587499] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:44:34,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:44:34,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 24 [2022-12-14 04:44:34,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82862353] [2022-12-14 04:44:34,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:44:34,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 04:44:34,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:44:34,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 04:44:34,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=361, Unknown=6, NotChecked=258, Total=702 [2022-12-14 04:44:34,744 INFO L87 Difference]: Start difference. First operand 187 states and 223 transitions. Second operand has 25 states, 23 states have (on average 1.826086956521739) internal successors, (42), 24 states have internal predecessors, (42), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 04:44:37,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:44:37,267 INFO L93 Difference]: Finished difference Result 296 states and 341 transitions. [2022-12-14 04:44:37,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 04:44:37,268 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.826086956521739) internal successors, (42), 24 states have internal predecessors, (42), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 39 [2022-12-14 04:44:37,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:44:37,268 INFO L225 Difference]: With dead ends: 296 [2022-12-14 04:44:37,268 INFO L226 Difference]: Without dead ends: 296 [2022-12-14 04:44:37,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 93 SyntacticMatches, 8 SemanticMatches, 41 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=226, Invalid=1124, Unknown=6, NotChecked=450, Total=1806 [2022-12-14 04:44:37,269 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 448 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 2007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 933 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 04:44:37,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 877 Invalid, 2007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1027 Invalid, 0 Unknown, 933 Unchecked, 1.7s Time] [2022-12-14 04:44:37,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-12-14 04:44:37,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 199. [2022-12-14 04:44:37,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 173 states have (on average 1.2716763005780347) internal successors, (220), 184 states have internal predecessors, (220), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2022-12-14 04:44:37,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 240 transitions. [2022-12-14 04:44:37,272 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 240 transitions. Word has length 39 [2022-12-14 04:44:37,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:44:37,272 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 240 transitions. [2022-12-14 04:44:37,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.826086956521739) internal successors, (42), 24 states have internal predecessors, (42), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 04:44:37,273 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 240 transitions. [2022-12-14 04:44:37,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 04:44:37,273 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:44:37,273 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:44:37,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Ended with exit code 0 [2022-12-14 04:44:37,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (65)] Ended with exit code 0 [2022-12-14 04:44:37,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-12-14 04:44:37,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:44:37,876 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:44:37,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:44:37,877 INFO L85 PathProgramCache]: Analyzing trace with hash -275846323, now seen corresponding path program 1 times [2022-12-14 04:44:37,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:44:37,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [180716881] [2022-12-14 04:44:37,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:37,878 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:44:37,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:44:37,881 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:44:37,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-12-14 04:44:37,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:37,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 04:44:37,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:44:37,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:44:38,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 04:44:38,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 04:44:38,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 04:44:38,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 04:44:38,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:44:38,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:44:38,397 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:44:38,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [180716881] [2022-12-14 04:44:38,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [180716881] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:44:38,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1101601313] [2022-12-14 04:44:38,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:38,398 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:44:38,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:44:38,398 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:44:38,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2022-12-14 04:44:38,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:38,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 04:44:38,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:44:38,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:44:38,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 04:44:38,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 04:44:38,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 04:44:38,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 04:44:38,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:44:38,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:44:38,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1101601313] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:44:38,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133213204] [2022-12-14 04:44:38,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:38,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:44:38,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:44:38,992 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:44:38,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-12-14 04:44:39,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:39,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 04:44:39,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:44:39,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:44:39,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 04:44:39,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 04:44:39,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 04:44:39,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 04:44:39,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:44:39,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:44:39,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133213204] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:44:39,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:44:39,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 16 [2022-12-14 04:44:39,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710435874] [2022-12-14 04:44:39,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:44:39,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 04:44:39,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:44:39,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 04:44:39,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-12-14 04:44:39,382 INFO L87 Difference]: Start difference. First operand 199 states and 240 transitions. Second operand has 17 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 04:44:39,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:44:39,961 INFO L93 Difference]: Finished difference Result 219 states and 260 transitions. [2022-12-14 04:44:39,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 04:44:39,961 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 40 [2022-12-14 04:44:39,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:44:39,962 INFO L225 Difference]: With dead ends: 219 [2022-12-14 04:44:39,962 INFO L226 Difference]: Without dead ends: 219 [2022-12-14 04:44:39,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 146 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-12-14 04:44:39,962 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 48 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 04:44:39,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 555 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 04:44:39,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-12-14 04:44:39,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 211. [2022-12-14 04:44:39,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 185 states have (on average 1.2540540540540541) internal successors, (232), 196 states have internal predecessors, (232), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2022-12-14 04:44:39,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 252 transitions. [2022-12-14 04:44:39,967 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 252 transitions. Word has length 40 [2022-12-14 04:44:39,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:44:39,967 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 252 transitions. [2022-12-14 04:44:39,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 04:44:39,967 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 252 transitions. [2022-12-14 04:44:39,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 04:44:39,968 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:44:39,968 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 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, 1] [2022-12-14 04:44:39,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (68)] Ended with exit code 0 [2022-12-14 04:44:40,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Ended with exit code 0 [2022-12-14 04:44:40,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-12-14 04:44:40,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:44:40,570 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:44:40,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:44:40,572 INFO L85 PathProgramCache]: Analyzing trace with hash -72017103, now seen corresponding path program 1 times [2022-12-14 04:44:40,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:44:40,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1743592680] [2022-12-14 04:44:40,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:40,573 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:44:40,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:44:40,576 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:44:40,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-12-14 04:44:40,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:40,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 04:44:40,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:44:40,989 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 04:44:40,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:44:41,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-12-14 04:44:41,784 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 04:44:41,784 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:44:41,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1743592680] [2022-12-14 04:44:41,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1743592680] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:44:41,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1636421827] [2022-12-14 04:44:41,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:41,784 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:44:41,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:44:41,785 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:44:41,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (71)] Waiting until timeout for monitored process [2022-12-14 04:44:41,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:41,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 04:44:41,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:44:42,023 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 04:44:42,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:44:46,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-12-14 04:44:46,374 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 04:44:46,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1636421827] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:44:46,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234151995] [2022-12-14 04:44:46,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:46,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:44:46,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:44:46,375 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:44:46,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-12-14 04:44:46,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:46,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 04:44:46,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:44:46,562 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 04:44:46,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:44:53,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-12-14 04:44:53,473 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 04:44:53,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234151995] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:44:53,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 04:44:53,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 19 [2022-12-14 04:44:53,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560417808] [2022-12-14 04:44:53,473 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 04:44:53,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 04:44:53,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:44:53,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 04:44:53,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=323, Unknown=5, NotChecked=0, Total=380 [2022-12-14 04:44:53,474 INFO L87 Difference]: Start difference. First operand 211 states and 252 transitions. Second operand has 20 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 5 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 04:44:55,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:44:55,570 INFO L93 Difference]: Finished difference Result 284 states and 318 transitions. [2022-12-14 04:44:55,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 04:44:55,571 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 5 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 41 [2022-12-14 04:44:55,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:44:55,572 INFO L225 Difference]: With dead ends: 284 [2022-12-14 04:44:55,572 INFO L226 Difference]: Without dead ends: 284 [2022-12-14 04:44:55,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=137, Invalid=728, Unknown=5, NotChecked=0, Total=870 [2022-12-14 04:44:55,573 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 478 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 910 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 04:44:55,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [478 Valid, 910 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 04:44:55,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-12-14 04:44:55,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 208. [2022-12-14 04:44:55,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 183 states have (on average 1.2349726775956285) internal successors, (226), 193 states have internal predecessors, (226), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2022-12-14 04:44:55,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 246 transitions. [2022-12-14 04:44:55,578 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 246 transitions. Word has length 41 [2022-12-14 04:44:55,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:44:55,578 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 246 transitions. [2022-12-14 04:44:55,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 5 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 04:44:55,579 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 246 transitions. [2022-12-14 04:44:55,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 04:44:55,579 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:44:55,579 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1] [2022-12-14 04:44:55,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-12-14 04:44:55,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Ended with exit code 0 [2022-12-14 04:44:55,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (71)] Forceful destruction successful, exit code 0 [2022-12-14 04:44:56,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 04:44:56,182 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:44:56,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:44:56,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1776836544, now seen corresponding path program 1 times [2022-12-14 04:44:56,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:44:56,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [545551280] [2022-12-14 04:44:56,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:56,184 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:44:56,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:44:56,187 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:44:56,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-12-14 04:44:56,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:56,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 04:44:56,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:44:56,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:44:57,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:44:57,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:44:58,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:44:58,656 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:44:58,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [545551280] [2022-12-14 04:44:58,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [545551280] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:44:58,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [456440601] [2022-12-14 04:44:58,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:44:58,657 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:44:58,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:44:58,657 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:44:58,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (74)] Waiting until timeout for monitored process [2022-12-14 04:44:58,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:44:58,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 04:44:58,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:44:58,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:44:59,739 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:44:59,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:45:02,176 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:45:02,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [456440601] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:45:02,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044308883] [2022-12-14 04:45:02,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:45:02,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:45:02,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:45:02,177 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:45:02,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-12-14 04:45:02,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:45:02,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 04:45:02,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:45:02,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:45:02,661 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:45:02,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:45:04,698 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:45:04,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044308883] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:45:04,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 04:45:04,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 16, 13, 14, 12] total 47 [2022-12-14 04:45:04,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221316891] [2022-12-14 04:45:04,699 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 04:45:04,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-14 04:45:04,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:45:04,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-14 04:45:04,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=2013, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 04:45:04,701 INFO L87 Difference]: Start difference. First operand 208 states and 246 transitions. Second operand has 48 states, 45 states have (on average 2.6666666666666665) internal successors, (120), 43 states have internal predecessors, (120), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-12-14 04:45:15,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:45:15,807 INFO L93 Difference]: Finished difference Result 367 states and 400 transitions. [2022-12-14 04:45:15,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-14 04:45:15,809 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 2.6666666666666665) internal successors, (120), 43 states have internal predecessors, (120), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 40 [2022-12-14 04:45:15,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:45:15,810 INFO L225 Difference]: With dead ends: 367 [2022-12-14 04:45:15,810 INFO L226 Difference]: Without dead ends: 367 [2022-12-14 04:45:15,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 186 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1559 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=900, Invalid=5262, Unknown=0, NotChecked=0, Total=6162 [2022-12-14 04:45:15,811 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 1175 mSDsluCounter, 2142 mSDsCounter, 0 mSdLazyCounter, 2039 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1175 SdHoareTripleChecker+Valid, 2237 SdHoareTripleChecker+Invalid, 2131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-12-14 04:45:15,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1175 Valid, 2237 Invalid, 2131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2039 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-12-14 04:45:15,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-12-14 04:45:15,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 208. [2022-12-14 04:45:15,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 183 states have (on average 1.2349726775956285) internal successors, (226), 193 states have internal predecessors, (226), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2022-12-14 04:45:15,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 246 transitions. [2022-12-14 04:45:15,815 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 246 transitions. Word has length 40 [2022-12-14 04:45:15,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:45:15,815 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 246 transitions. [2022-12-14 04:45:15,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 2.6666666666666665) internal successors, (120), 43 states have internal predecessors, (120), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-12-14 04:45:15,815 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 246 transitions. [2022-12-14 04:45:15,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 04:45:15,816 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:45:15,816 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:45:15,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (74)] Ended with exit code 0 [2022-12-14 04:45:16,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-12-14 04:45:16,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Ended with exit code 0 [2022-12-14 04:45:16,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:45:16,418 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:45:16,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:45:16,419 INFO L85 PathProgramCache]: Analyzing trace with hash 392679819, now seen corresponding path program 1 times [2022-12-14 04:45:16,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:45:16,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1495306359] [2022-12-14 04:45:16,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:45:16,421 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:45:16,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:45:16,423 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:45:16,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-12-14 04:45:16,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:45:16,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 04:45:16,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:45:16,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:45:16,695 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 04:45:16,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 04:45:16,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 04:45:16,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-12-14 04:45:16,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 04:45:16,865 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 04:45:16,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:45:16,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2022-12-14 04:45:16,982 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:45:16,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 56 [2022-12-14 04:45:17,221 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:45:17,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1495306359] [2022-12-14 04:45:17,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1495306359] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:45:17,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1001804690] [2022-12-14 04:45:17,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:45:17,221 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:45:17,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:45:17,222 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:45:17,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (77)] Waiting until timeout for monitored process [2022-12-14 04:45:17,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:45:17,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 04:45:17,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:45:17,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:45:17,672 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 04:45:17,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 04:45:17,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 04:45:17,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-12-14 04:45:17,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 04:45:17,985 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 04:45:17,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:45:18,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2022-12-14 04:45:18,087 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:45:18,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 56 [2022-12-14 04:45:20,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1001804690] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:45:20,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239529757] [2022-12-14 04:45:20,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:45:20,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:45:20,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:45:20,210 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:45:20,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-12-14 04:45:20,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:45:20,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 04:45:20,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:45:20,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:45:20,364 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 04:45:20,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 04:45:20,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 04:45:20,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-12-14 04:45:20,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 04:45:20,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 04:45:20,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:45:20,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2022-12-14 04:45:20,530 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:45:20,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 56 [2022-12-14 04:45:20,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239529757] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:45:20,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:45:20,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 20 [2022-12-14 04:45:20,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845058442] [2022-12-14 04:45:20,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:45:20,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 04:45:20,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:45:20,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 04:45:20,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-12-14 04:45:20,663 INFO L87 Difference]: Start difference. First operand 208 states and 246 transitions. Second operand has 21 states, 20 states have (on average 2.8) internal successors, (56), 17 states have internal predecessors, (56), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 04:45:21,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:45:21,398 INFO L93 Difference]: Finished difference Result 229 states and 268 transitions. [2022-12-14 04:45:21,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 04:45:21,398 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.8) internal successors, (56), 17 states have internal predecessors, (56), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2022-12-14 04:45:21,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:45:21,398 INFO L225 Difference]: With dead ends: 229 [2022-12-14 04:45:21,399 INFO L226 Difference]: Without dead ends: 229 [2022-12-14 04:45:21,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 149 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-12-14 04:45:21,399 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 48 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 04:45:21,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 645 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 04:45:21,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-12-14 04:45:21,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 202. [2022-12-14 04:45:21,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 177 states have (on average 1.2485875706214689) internal successors, (221), 187 states have internal predecessors, (221), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2022-12-14 04:45:21,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 241 transitions. [2022-12-14 04:45:21,402 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 241 transitions. Word has length 41 [2022-12-14 04:45:21,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:45:21,402 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 241 transitions. [2022-12-14 04:45:21,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.8) internal successors, (56), 17 states have internal predecessors, (56), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 04:45:21,403 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 241 transitions. [2022-12-14 04:45:21,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 04:45:21,403 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:45:21,403 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:45:21,410 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Ended with exit code 0 [2022-12-14 04:45:21,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-12-14 04:45:21,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (77)] Ended with exit code 0 [2022-12-14 04:45:22,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 04:45:22,006 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:45:22,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:45:22,007 INFO L85 PathProgramCache]: Analyzing trace with hash -503073279, now seen corresponding path program 1 times [2022-12-14 04:45:22,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:45:22,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [743958935] [2022-12-14 04:45:22,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:45:22,008 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:45:22,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:45:22,009 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:45:22,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-12-14 04:45:22,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:45:22,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 04:45:22,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:45:22,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:45:22,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-12-14 04:45:22,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 04:45:22,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:45:23,491 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 04:45:23,491 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:45:23,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [743958935] [2022-12-14 04:45:23,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [743958935] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:45:23,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [381659451] [2022-12-14 04:45:23,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:45:23,492 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:45:23,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:45:23,492 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:45:23,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (80)] Waiting until timeout for monitored process [2022-12-14 04:45:23,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:45:23,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 04:45:23,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:45:23,894 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 04:45:23,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:45:24,139 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 04:45:24,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [381659451] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:45:24,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701923598] [2022-12-14 04:45:24,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:45:24,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:45:24,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:45:24,141 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:45:24,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-12-14 04:45:24,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:45:24,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 04:45:24,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:45:24,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 04:45:24,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:45:24,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 04:45:24,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701923598] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:45:24,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 04:45:24,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 12, 9, 12, 9] total 33 [2022-12-14 04:45:24,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419648482] [2022-12-14 04:45:24,484 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 04:45:24,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-14 04:45:24,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:45:24,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-14 04:45:24,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 04:45:24,485 INFO L87 Difference]: Start difference. First operand 202 states and 241 transitions. Second operand has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 31 states have internal predecessors, (75), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-14 04:45:26,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:45:26,953 INFO L93 Difference]: Finished difference Result 415 states and 461 transitions. [2022-12-14 04:45:26,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 04:45:26,954 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 31 states have internal predecessors, (75), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 41 [2022-12-14 04:45:26,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:45:26,955 INFO L225 Difference]: With dead ends: 415 [2022-12-14 04:45:26,955 INFO L226 Difference]: Without dead ends: 415 [2022-12-14 04:45:26,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 205 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=601, Invalid=2479, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 04:45:26,956 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 1559 mSDsluCounter, 1167 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1559 SdHoareTripleChecker+Valid, 1260 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:45:26,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1559 Valid, 1260 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 04:45:26,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-12-14 04:45:26,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 193. [2022-12-14 04:45:26,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 168 states have (on average 1.244047619047619) internal successors, (209), 178 states have internal predecessors, (209), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2022-12-14 04:45:26,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 229 transitions. [2022-12-14 04:45:26,962 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 229 transitions. Word has length 41 [2022-12-14 04:45:26,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:45:26,962 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 229 transitions. [2022-12-14 04:45:26,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 31 states have internal predecessors, (75), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-14 04:45:26,962 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 229 transitions. [2022-12-14 04:45:26,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 04:45:26,963 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:45:26,963 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 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, 1, 1] [2022-12-14 04:45:26,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (80)] Forceful destruction successful, exit code 0 [2022-12-14 04:45:27,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Ended with exit code 0 [2022-12-14 04:45:27,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-12-14 04:45:27,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:45:27,565 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:45:27,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:45:27,566 INFO L85 PathProgramCache]: Analyzing trace with hash 2062437122, now seen corresponding path program 1 times [2022-12-14 04:45:27,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:45:27,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [568263132] [2022-12-14 04:45:27,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:45:27,567 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:45:27,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:45:27,570 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:45:27,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-12-14 04:45:27,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:45:27,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 04:45:27,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:45:27,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 15 treesize of output 11 [2022-12-14 04:45:28,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 04:45:28,020 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 04:45:28,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:45:28,207 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 04:45:28,207 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:45:28,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [568263132] [2022-12-14 04:45:28,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [568263132] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:45:28,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [751907632] [2022-12-14 04:45:28,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:45:28,207 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:45:28,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:45:28,208 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:45:28,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (83)] Waiting until timeout for monitored process [2022-12-14 04:45:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:45:28,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 04:45:28,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:45:28,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 15 treesize of output 11 [2022-12-14 04:45:28,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 04:45:28,547 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 04:45:28,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:45:28,604 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 04:45:28,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [751907632] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:45:28,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516031233] [2022-12-14 04:45:28,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:45:28,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:45:28,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:45:28,605 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:45:28,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-12-14 04:45:28,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:45:28,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 04:45:28,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:45:28,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 15 treesize of output 11 [2022-12-14 04:45:28,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 04:45:28,872 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 04:45:28,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:45:28,927 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 04:45:28,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516031233] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:45:28,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 04:45:28,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 12, 8, 12, 8] total 17 [2022-12-14 04:45:28,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467264217] [2022-12-14 04:45:28,927 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 04:45:28,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 04:45:28,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:45:28,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 04:45:28,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-12-14 04:45:28,928 INFO L87 Difference]: Start difference. First operand 193 states and 229 transitions. Second operand has 18 states, 17 states have (on average 3.0) internal successors, (51), 15 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 04:45:31,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:45:32,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:45:32,256 INFO L93 Difference]: Finished difference Result 287 states and 318 transitions. [2022-12-14 04:45:32,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 04:45:32,257 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.0) internal successors, (51), 15 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 42 [2022-12-14 04:45:32,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:45:32,257 INFO L225 Difference]: With dead ends: 287 [2022-12-14 04:45:32,258 INFO L226 Difference]: Without dead ends: 287 [2022-12-14 04:45:32,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 226 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=231, Invalid=1175, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 04:45:32,258 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 575 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-12-14 04:45:32,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 904 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 470 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-12-14 04:45:32,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-12-14 04:45:32,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 195. [2022-12-14 04:45:32,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 170 states have (on average 1.2411764705882353) internal successors, (211), 180 states have internal predecessors, (211), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2022-12-14 04:45:32,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 231 transitions. [2022-12-14 04:45:32,261 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 231 transitions. Word has length 42 [2022-12-14 04:45:32,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:45:32,261 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 231 transitions. [2022-12-14 04:45:32,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.0) internal successors, (51), 15 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 04:45:32,261 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 231 transitions. [2022-12-14 04:45:32,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 04:45:32,262 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:45:32,262 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:45:32,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (83)] Ended with exit code 0 [2022-12-14 04:45:32,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Ended with exit code 0 [2022-12-14 04:45:32,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-12-14 04:45:32,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:45:32,864 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:45:32,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:45:32,865 INFO L85 PathProgramCache]: Analyzing trace with hash -752641937, now seen corresponding path program 1 times [2022-12-14 04:45:32,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:45:32,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1850512395] [2022-12-14 04:45:32,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:45:32,867 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:45:32,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:45:32,868 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:45:32,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-12-14 04:45:33,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:45:33,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 04:45:33,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:45:33,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 13 treesize of output 9 [2022-12-14 04:45:33,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-12-14 04:45:33,275 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:45:33,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:45:37,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-12-14 04:45:37,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-12-14 04:45:37,450 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 04:45:37,451 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:45:37,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1850512395] [2022-12-14 04:45:37,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1850512395] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:45:37,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2016098714] [2022-12-14 04:45:37,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:45:37,451 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:45:37,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:45:37,452 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:45:37,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (86)] Waiting until timeout for monitored process [2022-12-14 04:45:37,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:45:37,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 04:45:37,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:45:37,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 13 treesize of output 9 [2022-12-14 04:45:37,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 04:45:37,986 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:45:37,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:45:38,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-12-14 04:45:38,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-12-14 04:45:38,066 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 04:45:38,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2016098714] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:45:38,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456345365] [2022-12-14 04:45:38,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:45:38,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:45:38,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:45:38,068 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:45:38,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-12-14 04:45:38,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:45:38,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 04:45:38,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:45:38,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 13 treesize of output 9 [2022-12-14 04:45:38,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 04:45:38,369 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:45:38,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:45:38,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-12-14 04:45:38,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-12-14 04:45:38,445 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 04:45:38,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456345365] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:45:38,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 04:45:38,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 11, 7, 11, 7] total 21 [2022-12-14 04:45:38,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628904061] [2022-12-14 04:45:38,446 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 04:45:38,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 04:45:38,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:45:38,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 04:45:38,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=393, Unknown=2, NotChecked=0, Total=462 [2022-12-14 04:45:38,447 INFO L87 Difference]: Start difference. First operand 195 states and 231 transitions. Second operand has 22 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 21 states have internal predecessors, (83), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 04:45:40,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:45:42,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:45:44,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:45:46,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:45:49,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:45:51,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:45:51,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:45:51,248 INFO L93 Difference]: Finished difference Result 239 states and 271 transitions. [2022-12-14 04:45:51,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 04:45:51,248 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 21 states have internal predecessors, (83), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2022-12-14 04:45:51,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:45:51,249 INFO L225 Difference]: With dead ends: 239 [2022-12-14 04:45:51,249 INFO L226 Difference]: Without dead ends: 239 [2022-12-14 04:45:51,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 216 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=177, Invalid=943, Unknown=2, NotChecked=0, Total=1122 [2022-12-14 04:45:51,249 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 149 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 6 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2022-12-14 04:45:51,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 952 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 465 Invalid, 6 Unknown, 0 Unchecked, 12.6s Time] [2022-12-14 04:45:51,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-12-14 04:45:51,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 205. [2022-12-14 04:45:51,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 177 states have (on average 1.2372881355932204) internal successors, (219), 189 states have internal predecessors, (219), 7 states have call successors, (7), 4 states have call predecessors, (7), 7 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2022-12-14 04:45:51,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 239 transitions. [2022-12-14 04:45:51,252 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 239 transitions. Word has length 41 [2022-12-14 04:45:51,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:45:51,252 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 239 transitions. [2022-12-14 04:45:51,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 21 states have internal predecessors, (83), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 04:45:51,252 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 239 transitions. [2022-12-14 04:45:51,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 04:45:51,253 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:45:51,253 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:45:51,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-12-14 04:45:51,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (86)] Ended with exit code 0 [2022-12-14 04:45:51,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Ended with exit code 0 [2022-12-14 04:45:51,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:45:51,855 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:45:51,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:45:51,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1671328571, now seen corresponding path program 3 times [2022-12-14 04:45:51,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:45:51,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1966046356] [2022-12-14 04:45:51,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 04:45:51,857 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:45:51,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:45:51,860 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:45:51,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-12-14 04:45:52,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 04:45:52,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:45:52,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-14 04:45:52,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:45:52,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:45:52,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:45:52,441 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_1395 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1395))))) is different from true [2022-12-14 04:45:52,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:45:52,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 04:45:52,471 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 04:45:52,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 04:45:52,641 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_1396 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1396))))) is different from true [2022-12-14 04:45:52,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:45:52,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 04:45:52,673 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 04:45:52,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 04:45:52,738 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 6 not checked. [2022-12-14 04:45:52,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:45:54,158 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:45:54,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1966046356] [2022-12-14 04:45:54,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1966046356] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:45:54,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [196728457] [2022-12-14 04:45:54,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 04:45:54,159 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:45:54,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:45:54,160 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:45:54,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (89)] Waiting until timeout for monitored process [2022-12-14 04:45:54,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 04:45:54,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:45:54,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-14 04:45:54,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:45:54,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:45:54,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:45:54,609 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_1432 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1432))))) is different from true [2022-12-14 04:45:54,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:45:54,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 04:45:54,635 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 04:45:54,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 04:45:54,747 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_1433 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1433) |c_#length|)))) is different from true [2022-12-14 04:45:54,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:45:54,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 04:45:54,775 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 04:45:54,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 04:45:54,813 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 6 not checked. [2022-12-14 04:45:54,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:45:55,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [196728457] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:45:55,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951464743] [2022-12-14 04:45:55,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 04:45:55,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:45:55,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:45:55,027 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:45:55,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-12-14 04:45:55,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 04:45:55,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:45:55,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-14 04:45:55,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:45:55,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:45:55,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:45:55,329 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_1469 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1469) |c_#length|)))) is different from true [2022-12-14 04:45:55,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:45:55,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 04:45:55,355 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 04:45:55,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 04:45:55,453 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_1470 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1470))))) is different from true [2022-12-14 04:45:55,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:45:55,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 04:45:55,487 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 04:45:55,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 04:45:55,507 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 6 not checked. [2022-12-14 04:45:55,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:45:57,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951464743] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:45:57,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:45:57,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 20 [2022-12-14 04:45:57,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106600865] [2022-12-14 04:45:57,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:45:57,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 04:45:57,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:45:57,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 04:45:57,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=234, Unknown=6, NotChecked=210, Total=506 [2022-12-14 04:45:57,810 INFO L87 Difference]: Start difference. First operand 205 states and 239 transitions. Second operand has 21 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 20 states have internal predecessors, (37), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 04:45:59,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:45:59,343 INFO L93 Difference]: Finished difference Result 267 states and 294 transitions. [2022-12-14 04:45:59,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 04:45:59,344 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 20 states have internal predecessors, (37), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 42 [2022-12-14 04:45:59,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:45:59,345 INFO L225 Difference]: With dead ends: 267 [2022-12-14 04:45:59,345 INFO L226 Difference]: Without dead ends: 267 [2022-12-14 04:45:59,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 112 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=170, Invalid=718, Unknown=6, NotChecked=366, Total=1260 [2022-12-14 04:45:59,346 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 445 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 849 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 04:45:59,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 571 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 563 Invalid, 0 Unknown, 849 Unchecked, 0.9s Time] [2022-12-14 04:45:59,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-12-14 04:45:59,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 193. [2022-12-14 04:45:59,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 167 states have (on average 1.2455089820359282) internal successors, (208), 179 states have internal predecessors, (208), 5 states have call successors, (5), 4 states have call predecessors, (5), 7 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) [2022-12-14 04:45:59,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 222 transitions. [2022-12-14 04:45:59,350 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 222 transitions. Word has length 42 [2022-12-14 04:45:59,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:45:59,350 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 222 transitions. [2022-12-14 04:45:59,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 20 states have internal predecessors, (37), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 04:45:59,350 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 222 transitions. [2022-12-14 04:45:59,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 04:45:59,350 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:45:59,350 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:45:59,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-12-14 04:45:59,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (89)] Forceful destruction successful, exit code 0 [2022-12-14 04:45:59,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Ended with exit code 0 [2022-12-14 04:45:59,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:45:59,952 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:45:59,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:45:59,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1199661072, now seen corresponding path program 1 times [2022-12-14 04:45:59,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:45:59,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1116466162] [2022-12-14 04:45:59,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:45:59,954 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:45:59,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:45:59,957 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:45:59,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2022-12-14 04:46:00,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:46:00,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 04:46:00,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:46:00,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 treesize of output 7 [2022-12-14 04:46:00,354 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-14 04:46:00,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 04:46:00,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 04:46:00,676 WARN L859 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32))) (exists ((v_ArrVal_1484 (_ BitVec 1)) (|ULTIMATE.start_entry_point_~array~0#1.base| (_ BitVec 32))) (and (= (store (store (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base| v_ArrVal_1484) (_ bv0 32) (_ bv0 1)) |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 1)) |c_#valid|) (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base|) (_ bv0 1))))) is different from true [2022-12-14 04:46:00,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:46:00,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:46:00,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-12-14 04:46:00,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2022-12-14 04:46:09,386 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:46:09,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1116466162] [2022-12-14 04:46:09,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1116466162] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:46:09,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1151073282] [2022-12-14 04:46:09,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:46:09,386 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:46:09,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:46:09,387 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:46:09,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (92)] Waiting until timeout for monitored process [2022-12-14 04:46:09,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:46:09,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 04:46:09,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:46:09,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 treesize of output 7 [2022-12-14 04:46:09,944 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-14 04:46:09,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 04:46:10,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 04:46:10,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:46:10,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:46:10,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-12-14 04:46:10,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2022-12-14 04:46:10,626 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1509 (_ BitVec 1)) (v_arrayElimCell_158 (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_#t~ret45#1.base_158| (_ BitVec 32)) (v_antiDerIndex_entry0_1 (_ BitVec 32))) (let ((.cse0 (select |c_ULTIMATE.start_main_old_#valid#1| v_antiDerIndex_entry0_1)) (.cse1 (store |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret45#1.base_158| v_ArrVal_1509))) (or (= (bvadd .cse0 (select (store (store .cse1 (_ bv0 32) (_ bv0 1)) |v_ULTIMATE.start_entry_point_#t~ret45#1.base_158| (_ bv0 1)) v_antiDerIndex_entry0_1)) (_ bv0 1)) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret45#1.base_158|))) (= (bvadd .cse0 (select (store (store .cse1 v_arrayElimCell_158 (_ bv0 1)) |v_ULTIMATE.start_entry_point_#t~ret45#1.base_158| (_ bv0 1)) v_antiDerIndex_entry0_1)) (_ bv0 1))))) is different from false [2022-12-14 04:46:10,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1151073282] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:46:10,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223138246] [2022-12-14 04:46:10,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:46:10,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:46:10,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:46:10,629 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:46:10,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-12-14 04:46:10,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:46:10,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 04:46:10,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:46:10,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 treesize of output 7 [2022-12-14 04:46:10,879 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-14 04:46:10,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 04:46:11,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 04:46:11,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:46:11,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:46:11,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-12-14 04:46:11,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2022-12-14 04:46:11,512 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_#t~ret45#1.base_161| (_ BitVec 32)) (v_arrayElimCell_158 (_ BitVec 32)) (v_ArrVal_1527 (_ BitVec 1)) (v_antiDerIndex_entry0_1 (_ BitVec 32))) (let ((.cse0 (select |c_ULTIMATE.start_main_old_#valid#1| v_antiDerIndex_entry0_1)) (.cse1 (store |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret45#1.base_161| v_ArrVal_1527))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret45#1.base_161|) (_ bv0 1))) (= (bvadd .cse0 (select (store (store .cse1 (_ bv0 32) (_ bv0 1)) |v_ULTIMATE.start_entry_point_#t~ret45#1.base_161| (_ bv0 1)) v_antiDerIndex_entry0_1)) (_ bv0 1)) (= (_ bv0 1) (bvadd .cse0 (select (store (store .cse1 v_arrayElimCell_158 (_ bv0 1)) |v_ULTIMATE.start_entry_point_#t~ret45#1.base_161| (_ bv0 1)) v_antiDerIndex_entry0_1)))))) is different from false [2022-12-14 04:46:11,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223138246] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:46:11,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:46:11,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-12-14 04:46:11,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205776526] [2022-12-14 04:46:11,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:46:11,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 04:46:11,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:46:11,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 04:46:11,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=814, Unknown=7, NotChecked=180, Total=1122 [2022-12-14 04:46:11,515 INFO L87 Difference]: Start difference. First operand 193 states and 222 transitions. Second operand has 22 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 19 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 04:46:20,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:46:20,863 INFO L93 Difference]: Finished difference Result 211 states and 239 transitions. [2022-12-14 04:46:20,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 04:46:20,864 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 19 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 42 [2022-12-14 04:46:20,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:46:20,864 INFO L225 Difference]: With dead ends: 211 [2022-12-14 04:46:20,864 INFO L226 Difference]: Without dead ends: 190 [2022-12-14 04:46:20,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 179 SyntacticMatches, 11 SemanticMatches, 45 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=267, Invalid=1626, Unknown=11, NotChecked=258, Total=2162 [2022-12-14 04:46:20,865 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 124 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 26 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 04:46:20,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 402 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 403 Invalid, 1 Unknown, 92 Unchecked, 0.7s Time] [2022-12-14 04:46:20,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-12-14 04:46:20,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 186. [2022-12-14 04:46:20,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 161 states have (on average 1.2422360248447204) internal successors, (200), 173 states have internal predecessors, (200), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 04:46:20,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 213 transitions. [2022-12-14 04:46:20,869 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 213 transitions. Word has length 42 [2022-12-14 04:46:20,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:46:20,869 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 213 transitions. [2022-12-14 04:46:20,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 19 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 04:46:20,869 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 213 transitions. [2022-12-14 04:46:20,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 04:46:20,870 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:46:20,870 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 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, 1, 1, 1] [2022-12-14 04:46:20,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (92)] Ended with exit code 0 [2022-12-14 04:46:21,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Ended with exit code 0 [2022-12-14 04:46:21,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-12-14 04:46:21,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:46:21,472 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:46:21,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:46:21,473 INFO L85 PathProgramCache]: Analyzing trace with hash -488958544, now seen corresponding path program 1 times [2022-12-14 04:46:21,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:46:21,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [949509664] [2022-12-14 04:46:21,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:46:21,475 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:46:21,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:46:21,476 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:46:21,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2022-12-14 04:46:21,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:46:21,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 04:46:21,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:46:22,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 15 treesize of output 11 [2022-12-14 04:46:22,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 04:46:22,502 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 04:46:22,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:46:22,922 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 04:46:22,923 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:46:22,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [949509664] [2022-12-14 04:46:22,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [949509664] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:46:22,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1519841406] [2022-12-14 04:46:22,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:46:22,923 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:46:22,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:46:22,924 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:46:22,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (95)] Waiting until timeout for monitored process [2022-12-14 04:46:23,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:46:23,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 04:46:23,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:46:23,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 15 treesize of output 11 [2022-12-14 04:46:23,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 04:46:23,640 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 04:46:23,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:46:23,709 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 04:46:23,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1519841406] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:46:23,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700213150] [2022-12-14 04:46:23,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:46:23,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:46:23,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:46:23,710 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:46:23,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-12-14 04:46:23,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:46:23,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 04:46:23,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:46:23,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 15 treesize of output 11 [2022-12-14 04:46:24,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 04:46:24,097 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 04:46:24,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:46:24,158 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 04:46:24,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700213150] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:46:24,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 04:46:24,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 13, 8, 13, 8] total 32 [2022-12-14 04:46:24,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109394387] [2022-12-14 04:46:24,159 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 04:46:24,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-14 04:46:24,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:46:24,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-14 04:46:24,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 04:46:24,160 INFO L87 Difference]: Start difference. First operand 186 states and 213 transitions. Second operand has 33 states, 32 states have (on average 2.75) internal successors, (88), 28 states have internal predecessors, (88), 7 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-12-14 04:46:26,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:46:28,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:46:30,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:46:32,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:46:34,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:46:38,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:46:38,509 INFO L93 Difference]: Finished difference Result 262 states and 285 transitions. [2022-12-14 04:46:38,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 04:46:38,510 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.75) internal successors, (88), 28 states have internal predecessors, (88), 7 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 43 [2022-12-14 04:46:38,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:46:38,511 INFO L225 Difference]: With dead ends: 262 [2022-12-14 04:46:38,511 INFO L226 Difference]: Without dead ends: 262 [2022-12-14 04:46:38,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 218 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=407, Invalid=2245, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 04:46:38,512 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 663 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 39 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2022-12-14 04:46:38,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [663 Valid, 992 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 849 Invalid, 5 Unknown, 0 Unchecked, 12.4s Time] [2022-12-14 04:46:38,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-12-14 04:46:38,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 188. [2022-12-14 04:46:38,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 163 states have (on average 1.2392638036809815) internal successors, (202), 175 states have internal predecessors, (202), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 04:46:38,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 215 transitions. [2022-12-14 04:46:38,514 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 215 transitions. Word has length 43 [2022-12-14 04:46:38,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:46:38,514 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 215 transitions. [2022-12-14 04:46:38,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.75) internal successors, (88), 28 states have internal predecessors, (88), 7 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-12-14 04:46:38,514 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 215 transitions. [2022-12-14 04:46:38,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 04:46:38,514 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:46:38,515 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:46:38,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-12-14 04:46:38,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Forceful destruction successful, exit code 0 [2022-12-14 04:46:38,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (95)] Forceful destruction successful, exit code 0 [2022-12-14 04:46:39,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 04:46:39,117 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:46:39,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:46:39,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1857063425, now seen corresponding path program 1 times [2022-12-14 04:46:39,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:46:39,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1003949814] [2022-12-14 04:46:39,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:46:39,119 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:46:39,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:46:39,122 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:46:39,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (97)] Waiting until timeout for monitored process [2022-12-14 04:46:39,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:46:39,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 04:46:39,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:46:39,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 13 treesize of output 9 [2022-12-14 04:46:39,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-12-14 04:46:39,566 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:46:39,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:46:39,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-12-14 04:46:39,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-14 04:46:39,946 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 04:46:39,946 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:46:39,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1003949814] [2022-12-14 04:46:39,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1003949814] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:46:39,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [15342042] [2022-12-14 04:46:39,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:46:39,946 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:46:39,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:46:39,947 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:46:39,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (98)] Waiting until timeout for monitored process [2022-12-14 04:46:40,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:46:40,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 04:46:40,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:46:40,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 04:46:41,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 04:46:41,169 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:46:41,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:46:41,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-12-14 04:46:41,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-14 04:46:41,334 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 04:46:41,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [15342042] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:46:41,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556680735] [2022-12-14 04:46:41,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:46:41,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:46:41,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:46:41,336 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:46:41,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-12-14 04:46:41,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:46:41,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 04:46:41,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:46:41,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 13 treesize of output 9 [2022-12-14 04:46:42,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 04:46:42,209 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:46:42,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:46:42,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-12-14 04:46:42,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-14 04:46:42,356 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 04:46:42,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556680735] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:46:42,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 04:46:42,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11, 8, 11, 8] total 34 [2022-12-14 04:46:42,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717805670] [2022-12-14 04:46:42,357 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 04:46:42,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 04:46:42,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:46:42,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 04:46:42,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1025, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 04:46:42,359 INFO L87 Difference]: Start difference. First operand 188 states and 215 transitions. Second operand has 35 states, 34 states have (on average 4.0) internal successors, (136), 33 states have internal predecessors, (136), 6 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-12-14 04:46:44,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:46:46,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:46:49,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:46:51,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:46:53,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:46:55,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:46:57,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:46:59,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:47:00,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:47:00,303 INFO L93 Difference]: Finished difference Result 213 states and 239 transitions. [2022-12-14 04:47:00,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 04:47:00,304 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 4.0) internal successors, (136), 33 states have internal predecessors, (136), 6 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 42 [2022-12-14 04:47:00,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:47:00,305 INFO L225 Difference]: With dead ends: 213 [2022-12-14 04:47:00,305 INFO L226 Difference]: Without dead ends: 213 [2022-12-14 04:47:00,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 210 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=302, Invalid=1678, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 04:47:00,305 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 347 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 15 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.3s IncrementalHoareTripleChecker+Time [2022-12-14 04:47:00,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 804 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 798 Invalid, 8 Unknown, 0 Unchecked, 17.3s Time] [2022-12-14 04:47:00,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-12-14 04:47:00,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 190. [2022-12-14 04:47:00,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 165 states have (on average 1.2363636363636363) internal successors, (204), 177 states have internal predecessors, (204), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 04:47:00,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 217 transitions. [2022-12-14 04:47:00,307 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 217 transitions. Word has length 42 [2022-12-14 04:47:00,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:47:00,307 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 217 transitions. [2022-12-14 04:47:00,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 4.0) internal successors, (136), 33 states have internal predecessors, (136), 6 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2022-12-14 04:47:00,308 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 217 transitions. [2022-12-14 04:47:00,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 04:47:00,308 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:47:00,308 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:47:00,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (97)] Ended with exit code 0 [2022-12-14 04:47:00,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (98)] Ended with exit code 0 [2022-12-14 04:47:00,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-12-14 04:47:00,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:47:00,910 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:47:00,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:47:00,911 INFO L85 PathProgramCache]: Analyzing trace with hash -591810866, now seen corresponding path program 1 times [2022-12-14 04:47:00,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:47:00,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1570390455] [2022-12-14 04:47:00,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:47:00,913 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:47:00,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:47:00,914 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:47:00,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2022-12-14 04:47:01,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:47:01,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 04:47:01,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:47:01,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 treesize of output 7 [2022-12-14 04:47:01,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-12-14 04:47:11,870 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_entry_point_~array~0#1.base| (_ BitVec 32))) (and (exists ((|v_ULTIMATE.start_free_17_#t~mem43#1.base_115| (_ BitVec 32)) (v_ArrVal_1675 (_ BitVec 1))) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base| v_ArrVal_1675))) (and (= (store (store .cse0 |v_ULTIMATE.start_free_17_#t~mem43#1.base_115| (_ bv0 1)) |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 1)) |c_#valid|) (= (_ bv0 1) (select .cse0 |v_ULTIMATE.start_free_17_#t~mem43#1.base_115|))))) (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base|) (_ bv0 1)))) is different from true [2022-12-14 04:47:11,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 04:47:11,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:47:14,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2022-12-14 04:47:34,508 WARN L233 SmtUtils]: Spent 7.06s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:47:34,508 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:47:34,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1570390455] [2022-12-14 04:47:34,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1570390455] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:47:34,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1423706246] [2022-12-14 04:47:34,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:47:34,509 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:47:34,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:47:34,510 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:47:34,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (101)] Waiting until timeout for monitored process [2022-12-14 04:47:34,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:47:34,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-14 04:47:34,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:47:37,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 04:47:38,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-12-14 04:47:38,520 WARN L859 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32))) (exists ((|ULTIMATE.start_entry_point_~array~0#1.base| (_ BitVec 32))) (and (= (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 1)) |c_#valid|) (not (= |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 32))) (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base|) (_ bv0 1))))) is different from true [2022-12-14 04:47:38,533 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 04:47:38,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:47:43,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 108 [2022-12-14 04:48:01,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1423706246] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:48:01,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111853968] [2022-12-14 04:48:01,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:48:01,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:48:01,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:48:01,640 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:48:01,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-12-14 04:48:01,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:48:01,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-14 04:48:01,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:48:06,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 treesize of output 7 [2022-12-14 04:48:07,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-12-14 04:48:07,093 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 04:48:07,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 29 [2022-12-14 04:48:14,775 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 04:48:14,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:48:14,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2022-12-14 04:48:55,943 WARN L233 SmtUtils]: Spent 8.08s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 04:48:55,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111853968] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:48:55,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:48:55,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 15] total 36 [2022-12-14 04:48:55,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259742986] [2022-12-14 04:48:55,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:48:55,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-14 04:48:55,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:48:55,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-14 04:48:55,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=2193, Unknown=38, NotChecked=194, Total=2652 [2022-12-14 04:48:55,945 INFO L87 Difference]: Start difference. First operand 190 states and 217 transitions. Second operand has 37 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 31 states have internal predecessors, (91), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-14 04:48:59,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:48:59,871 INFO L93 Difference]: Finished difference Result 194 states and 220 transitions. [2022-12-14 04:48:59,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 04:48:59,872 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 31 states have internal predecessors, (91), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2022-12-14 04:48:59,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:48:59,873 INFO L225 Difference]: With dead ends: 194 [2022-12-14 04:48:59,873 INFO L226 Difference]: Without dead ends: 167 [2022-12-14 04:48:59,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 131 SyntacticMatches, 8 SemanticMatches, 66 ConstructedPredicates, 2 IntricatePredicates, 3 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 113.7s TimeCoverageRelationStatistics Valid=455, Invalid=3805, Unknown=38, NotChecked=258, Total=4556 [2022-12-14 04:48:59,873 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 170 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 33 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:48:59,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 691 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 900 Invalid, 1 Unknown, 170 Unchecked, 2.1s Time] [2022-12-14 04:48:59,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-12-14 04:48:59,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2022-12-14 04:48:59,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 142 states have (on average 1.267605633802817) internal successors, (180), 154 states have internal predecessors, (180), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 04:48:59,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 191 transitions. [2022-12-14 04:48:59,875 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 191 transitions. Word has length 43 [2022-12-14 04:48:59,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:48:59,876 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 191 transitions. [2022-12-14 04:48:59,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 31 states have internal predecessors, (91), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-14 04:48:59,876 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 191 transitions. [2022-12-14 04:48:59,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 04:48:59,876 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:48:59,876 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 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, 1, 1, 1, 1] [2022-12-14 04:48:59,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-12-14 04:49:00,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (100)] Forceful destruction successful, exit code 0 [2022-12-14 04:49:00,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (101)] Ended with exit code 0 [2022-12-14 04:49:00,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 04:49:00,478 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:49:00,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:49:00,479 INFO L85 PathProgramCache]: Analyzing trace with hash 2022154436, now seen corresponding path program 1 times [2022-12-14 04:49:00,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:49:00,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1211052559] [2022-12-14 04:49:00,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:49:00,480 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:49:00,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:49:00,483 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:49:00,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (103)] Waiting until timeout for monitored process [2022-12-14 04:49:00,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:49:00,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 04:49:00,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:49:00,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:49:00,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 15 treesize of output 11 [2022-12-14 04:49:00,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-12-14 04:49:00,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 04:49:00,884 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 04:49:00,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:49:01,218 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 04:49:01,218 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:49:01,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1211052559] [2022-12-14 04:49:01,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1211052559] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:49:01,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [334042354] [2022-12-14 04:49:01,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:49:01,219 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:49:01,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:49:01,220 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:49:01,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (104)] Waiting until timeout for monitored process [2022-12-14 04:49:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:49:01,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 04:49:01,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:49:01,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:49:01,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 15 treesize of output 11 [2022-12-14 04:49:01,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-12-14 04:49:01,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 04:49:01,526 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 04:49:01,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:49:01,690 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 04:49:01,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [334042354] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:49:01,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334154480] [2022-12-14 04:49:01,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:49:01,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:49:01,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:49:01,692 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:49:01,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-12-14 04:49:01,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:49:01,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 04:49:01,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:49:01,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:49:01,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 15 treesize of output 11 [2022-12-14 04:49:01,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-12-14 04:49:01,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 04:49:01,917 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 04:49:01,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:49:02,109 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 04:49:02,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334154480] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:49:02,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 04:49:02,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 13, 9, 13, 9] total 19 [2022-12-14 04:49:02,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515495717] [2022-12-14 04:49:02,110 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 04:49:02,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 04:49:02,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:49:02,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 04:49:02,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2022-12-14 04:49:02,111 INFO L87 Difference]: Start difference. First operand 165 states and 191 transitions. Second operand has 20 states, 19 states have (on average 3.0) internal successors, (57), 17 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 04:49:04,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:49:04,136 INFO L93 Difference]: Finished difference Result 203 states and 228 transitions. [2022-12-14 04:49:04,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 04:49:04,138 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.0) internal successors, (57), 17 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 44 [2022-12-14 04:49:04,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:49:04,138 INFO L225 Difference]: With dead ends: 203 [2022-12-14 04:49:04,138 INFO L226 Difference]: Without dead ends: 203 [2022-12-14 04:49:04,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 242 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=181, Invalid=1225, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 04:49:04,139 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 206 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 04:49:04,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 662 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 04:49:04,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-12-14 04:49:04,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 167. [2022-12-14 04:49:04,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 144 states have (on average 1.2638888888888888) internal successors, (182), 156 states have internal predecessors, (182), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 04:49:04,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 193 transitions. [2022-12-14 04:49:04,141 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 193 transitions. Word has length 44 [2022-12-14 04:49:04,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:49:04,141 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 193 transitions. [2022-12-14 04:49:04,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.0) internal successors, (57), 17 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 04:49:04,141 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 193 transitions. [2022-12-14 04:49:04,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 04:49:04,141 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:49:04,141 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 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, 1, 1, 1, 1, 1] [2022-12-14 04:49:04,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (103)] Forceful destruction successful, exit code 0 [2022-12-14 04:49:04,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-12-14 04:49:04,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (104)] Ended with exit code 0 [2022-12-14 04:49:04,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 04:49:04,743 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:49:04,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:49:04,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1737721805, now seen corresponding path program 1 times [2022-12-14 04:49:04,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:49:04,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1433439399] [2022-12-14 04:49:04,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:49:04,746 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:49:04,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:49:04,748 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:49:04,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (106)] Waiting until timeout for monitored process [2022-12-14 04:49:05,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:49:05,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 04:49:05,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:49:05,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:49:05,175 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 04:49:05,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 04:49:05,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 04:49:05,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 04:49:09,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-12-14 04:49:09,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 04:49:09,575 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 04:49:09,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:49:10,313 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 04:49:10,313 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:49:10,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1433439399] [2022-12-14 04:49:10,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1433439399] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:49:10,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [267687739] [2022-12-14 04:49:10,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:49:10,313 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:49:10,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:49:10,314 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:49:10,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (107)] Waiting until timeout for monitored process [2022-12-14 04:49:10,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:49:10,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 04:49:10,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:49:10,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:49:10,615 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 04:49:10,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 04:49:10,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 04:49:10,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 04:49:12,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-12-14 04:49:12,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 04:49:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 04:49:12,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:49:15,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-14 04:49:15,423 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 04:49:15,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [267687739] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:49:15,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225819686] [2022-12-14 04:49:15,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:49:15,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:49:15,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:49:15,424 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:49:15,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-12-14 04:49:15,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:49:15,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 04:49:15,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:49:15,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:49:15,617 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 04:49:15,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 04:49:15,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 04:49:17,763 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_91| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_91|) (_ bv0 32)) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_91|))) is different from true [2022-12-14 04:49:17,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-12-14 04:49:17,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 04:49:17,937 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 6 not checked. [2022-12-14 04:49:17,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:49:18,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-14 04:49:18,478 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 04:49:18,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225819686] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:49:18,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 04:49:18,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15, 14, 15, 13] total 39 [2022-12-14 04:49:18,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464415442] [2022-12-14 04:49:18,478 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 04:49:18,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-14 04:49:18,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:49:18,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-14 04:49:18,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1347, Unknown=3, NotChecked=74, Total=1560 [2022-12-14 04:49:18,479 INFO L87 Difference]: Start difference. First operand 167 states and 193 transitions. Second operand has 40 states, 39 states have (on average 2.4358974358974357) internal successors, (95), 34 states have internal predecessors, (95), 7 states have call successors, (8), 7 states have call predecessors, (8), 10 states have return successors, (11), 10 states have call predecessors, (11), 7 states have call successors, (11) [2022-12-14 04:49:20,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:49:22,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:49:24,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:49:26,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:49:28,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:49:34,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:49:36,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:49:36,447 INFO L93 Difference]: Finished difference Result 237 states and 262 transitions. [2022-12-14 04:49:36,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 04:49:36,448 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.4358974358974357) internal successors, (95), 34 states have internal predecessors, (95), 7 states have call successors, (8), 7 states have call predecessors, (8), 10 states have return successors, (11), 10 states have call predecessors, (11), 7 states have call successors, (11) Word has length 45 [2022-12-14 04:49:36,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:49:36,449 INFO L225 Difference]: With dead ends: 237 [2022-12-14 04:49:36,449 INFO L226 Difference]: Without dead ends: 237 [2022-12-14 04:49:36,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 212 SyntacticMatches, 16 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1233 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=402, Invalid=3259, Unknown=3, NotChecked=118, Total=3782 [2022-12-14 04:49:36,450 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 385 mSDsluCounter, 1431 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 42 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 1509 SdHoareTripleChecker+Invalid, 1508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2022-12-14 04:49:36,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 1509 Invalid, 1508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1303 Invalid, 7 Unknown, 156 Unchecked, 14.3s Time] [2022-12-14 04:49:36,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-12-14 04:49:36,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 173. [2022-12-14 04:49:36,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 149 states have (on average 1.261744966442953) internal successors, (188), 161 states have internal predecessors, (188), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 04:49:36,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 199 transitions. [2022-12-14 04:49:36,452 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 199 transitions. Word has length 45 [2022-12-14 04:49:36,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:49:36,452 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 199 transitions. [2022-12-14 04:49:36,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.4358974358974357) internal successors, (95), 34 states have internal predecessors, (95), 7 states have call successors, (8), 7 states have call predecessors, (8), 10 states have return successors, (11), 10 states have call predecessors, (11), 7 states have call successors, (11) [2022-12-14 04:49:36,452 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 199 transitions. [2022-12-14 04:49:36,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 04:49:36,452 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:49:36,452 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:49:36,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-12-14 04:49:36,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (106)] Ended with exit code 0 [2022-12-14 04:49:36,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (107)] Ended with exit code 0 [2022-12-14 04:49:37,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 04:49:37,054 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:49:37,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:49:37,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1988382823, now seen corresponding path program 2 times [2022-12-14 04:49:37,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:49:37,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [331407356] [2022-12-14 04:49:37,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 04:49:37,057 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:49:37,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:49:37,060 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:49:37,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (109)] Waiting until timeout for monitored process [2022-12-14 04:49:37,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 04:49:37,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:49:37,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 04:49:37,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:49:37,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 treesize of output 7 [2022-12-14 04:49:37,536 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-12-14 04:49:37,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-12-14 04:49:37,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 04:49:37,639 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 04:49:37,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:49:38,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-12-14 04:49:38,223 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 04:49:38,223 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:49:38,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [331407356] [2022-12-14 04:49:38,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [331407356] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:49:38,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1980081535] [2022-12-14 04:49:38,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 04:49:38,223 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:49:38,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:49:38,224 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:49:38,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (110)] Waiting until timeout for monitored process [2022-12-14 04:49:38,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 04:49:38,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:49:38,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 04:49:38,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:49:38,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 15 treesize of output 11 [2022-12-14 04:49:39,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:49:39,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 04:49:39,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 04:49:39,239 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 04:49:39,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:49:41,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1980081535] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:49:41,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117310671] [2022-12-14 04:49:41,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 04:49:41,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:49:41,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:49:41,427 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:49:41,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-12-14 04:49:41,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 04:49:41,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:49:41,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 04:49:41,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:49:41,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 11 treesize of output 7 [2022-12-14 04:49:42,174 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-12-14 04:49:42,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-12-14 04:49:42,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 04:49:42,305 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 04:49:42,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:49:44,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-12-14 04:49:44,658 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 04:49:44,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117310671] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:49:44,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 5 imperfect interpolant sequences. [2022-12-14 04:49:44,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 14, 15, 11] total 36 [2022-12-14 04:49:44,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64700203] [2022-12-14 04:49:44,658 INFO L85 oduleStraightlineAll]: Using 5 imperfect interpolants to construct interpolant automaton [2022-12-14 04:49:44,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-14 04:49:44,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:49:44,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-14 04:49:44,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1222, Unknown=2, NotChecked=0, Total=1406 [2022-12-14 04:49:44,660 INFO L87 Difference]: Start difference. First operand 173 states and 199 transitions. Second operand has 37 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 30 states have internal predecessors, (89), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-12-14 04:49:47,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:49:47,109 INFO L93 Difference]: Finished difference Result 229 states and 249 transitions. [2022-12-14 04:49:47,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 04:49:47,111 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 30 states have internal predecessors, (89), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) Word has length 46 [2022-12-14 04:49:47,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:49:47,111 INFO L225 Difference]: With dead ends: 229 [2022-12-14 04:49:47,111 INFO L226 Difference]: Without dead ends: 229 [2022-12-14 04:49:47,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 195 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=496, Invalid=2582, Unknown=2, NotChecked=0, Total=3080 [2022-12-14 04:49:47,112 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 827 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 04:49:47,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [830 Valid, 677 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 04:49:47,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-12-14 04:49:47,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 175. [2022-12-14 04:49:47,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 151 states have (on average 1.271523178807947) internal successors, (192), 163 states have internal predecessors, (192), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 04:49:47,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 203 transitions. [2022-12-14 04:49:47,114 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 203 transitions. Word has length 46 [2022-12-14 04:49:47,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:49:47,114 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 203 transitions. [2022-12-14 04:49:47,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 30 states have internal predecessors, (89), 8 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-12-14 04:49:47,114 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 203 transitions. [2022-12-14 04:49:47,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 04:49:47,114 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:49:47,114 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:49:47,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (110)] Ended with exit code 0 [2022-12-14 04:49:47,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-12-14 04:49:47,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (109)] Ended with exit code 0 [2022-12-14 04:49:47,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:49:47,717 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:49:47,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:49:47,718 INFO L85 PathProgramCache]: Analyzing trace with hash 351491110, now seen corresponding path program 3 times [2022-12-14 04:49:47,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:49:47,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1863615135] [2022-12-14 04:49:47,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 04:49:47,719 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:49:47,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:49:47,722 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:49:47,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (112)] Waiting until timeout for monitored process [2022-12-14 04:49:47,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-12-14 04:49:47,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:49:47,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 04:49:47,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:49:47,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:49:49,298 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:49:49,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:50:01,246 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:50:01,246 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:50:01,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1863615135] [2022-12-14 04:50:01,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1863615135] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:50:01,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [558895638] [2022-12-14 04:50:01,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 04:50:01,247 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:50:01,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:50:01,248 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:50:01,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (113)] Waiting until timeout for monitored process [2022-12-14 04:50:01,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-12-14 04:50:01,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:50:01,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-14 04:50:01,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:50:01,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:50:03,242 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:50:03,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:50:17,774 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:50:17,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [558895638] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:50:17,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343400805] [2022-12-14 04:50:17,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 04:50:17,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:50:17,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:50:17,775 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:50:17,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-12-14 04:50:19,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-12-14 04:50:19,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:50:19,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 04:50:19,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:50:19,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:50:20,394 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:50:20,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:50:22,781 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:50:22,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343400805] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:50:22,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 04:50:22,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 26, 24, 21, 19] total 67 [2022-12-14 04:50:22,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507599898] [2022-12-14 04:50:22,782 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 04:50:22,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-12-14 04:50:22,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:50:22,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-12-14 04:50:22,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=927, Invalid=3629, Unknown=0, NotChecked=0, Total=4556 [2022-12-14 04:50:22,783 INFO L87 Difference]: Start difference. First operand 175 states and 203 transitions. Second operand has 68 states, 65 states have (on average 2.046153846153846) internal successors, (133), 65 states have internal predecessors, (133), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 04:52:55,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:52:55,544 INFO L93 Difference]: Finished difference Result 265 states and 341 transitions. [2022-12-14 04:52:55,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-12-14 04:52:55,546 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 65 states have (on average 2.046153846153846) internal successors, (133), 65 states have internal predecessors, (133), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2022-12-14 04:52:55,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:52:55,546 INFO L225 Difference]: With dead ends: 265 [2022-12-14 04:52:55,546 INFO L226 Difference]: Without dead ends: 265 [2022-12-14 04:52:55,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 186 SyntacticMatches, 6 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4914 ImplicationChecksByTransitivity, 165.0s TimeCoverageRelationStatistics Valid=3887, Invalid=13140, Unknown=3, NotChecked=0, Total=17030 [2022-12-14 04:52:55,548 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 1324 mSDsluCounter, 1128 mSDsCounter, 0 mSdLazyCounter, 2413 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1324 SdHoareTripleChecker+Valid, 1196 SdHoareTripleChecker+Invalid, 2611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 2413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:52:55,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1324 Valid, 1196 Invalid, 2611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 2413 Invalid, 0 Unknown, 0 Unchecked, 12.1s Time] [2022-12-14 04:52:55,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-12-14 04:52:55,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 211. [2022-12-14 04:52:55,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 187 states have (on average 1.2834224598930482) internal successors, (240), 199 states have internal predecessors, (240), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 04:52:55,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 251 transitions. [2022-12-14 04:52:55,551 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 251 transitions. Word has length 44 [2022-12-14 04:52:55,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:52:55,551 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 251 transitions. [2022-12-14 04:52:55,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 65 states have (on average 2.046153846153846) internal successors, (133), 65 states have internal predecessors, (133), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 04:52:55,552 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 251 transitions. [2022-12-14 04:52:55,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 04:52:55,552 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:52:55,552 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 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] [2022-12-14 04:52:55,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-12-14 04:52:55,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (113)] Ended with exit code 0 [2022-12-14 04:52:55,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (112)] Ended with exit code 0 [2022-12-14 04:52:56,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:52:56,154 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:52:56,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:52:56,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1510325227, now seen corresponding path program 2 times [2022-12-14 04:52:56,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:52:56,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [779206189] [2022-12-14 04:52:56,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 04:52:56,157 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:52:56,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:52:56,159 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:52:56,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (115)] Waiting until timeout for monitored process [2022-12-14 04:52:56,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 04:52:56,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:52:56,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 04:52:56,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:52:56,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 15 treesize of output 11 [2022-12-14 04:52:56,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 04:52:56,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 04:52:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 04:52:56,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:52:57,224 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:52:57,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [779206189] [2022-12-14 04:52:57,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [779206189] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:52:57,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1252624662] [2022-12-14 04:52:57,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 04:52:57,224 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:52:57,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:52:57,225 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:52:57,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (116)] Waiting until timeout for monitored process [2022-12-14 04:52:57,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 04:52:57,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:52:57,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 04:52:57,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:52:57,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 15 treesize of output 11 [2022-12-14 04:52:58,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:58,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 04:52:58,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 04:52:58,451 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 04:52:58,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:52:58,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1252624662] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:52:58,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598567962] [2022-12-14 04:52:58,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 04:52:58,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:52:58,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:52:58,925 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:52:58,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-12-14 04:52:59,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 04:52:59,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:52:59,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 04:52:59,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:52:59,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 15 treesize of output 11 [2022-12-14 04:52:59,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:52:59,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 04:52:59,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 04:52:59,491 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 04:52:59,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:52:59,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598567962] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:52:59,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:52:59,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 14] total 23 [2022-12-14 04:52:59,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586437562] [2022-12-14 04:52:59,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:52:59,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 04:52:59,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:52:59,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 04:52:59,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-12-14 04:52:59,908 INFO L87 Difference]: Start difference. First operand 211 states and 251 transitions. Second operand has 24 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 21 states have internal predecessors, (68), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-14 04:53:01,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:53:03,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:53:07,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:53:08,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:53:08,012 INFO L93 Difference]: Finished difference Result 324 states and 362 transitions. [2022-12-14 04:53:08,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 04:53:08,013 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 21 states have internal predecessors, (68), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 47 [2022-12-14 04:53:08,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:53:08,014 INFO L225 Difference]: With dead ends: 324 [2022-12-14 04:53:08,014 INFO L226 Difference]: Without dead ends: 324 [2022-12-14 04:53:08,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 145 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=213, Invalid=1119, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 04:53:08,014 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 369 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 18 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-12-14 04:53:08,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 771 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 880 Invalid, 3 Unknown, 0 Unchecked, 7.6s Time] [2022-12-14 04:53:08,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-12-14 04:53:08,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 242. [2022-12-14 04:53:08,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 215 states have (on average 1.2976744186046512) internal successors, (279), 228 states have internal predecessors, (279), 5 states have call successors, (5), 5 states have call predecessors, (5), 8 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2022-12-14 04:53:08,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 293 transitions. [2022-12-14 04:53:08,018 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 293 transitions. Word has length 47 [2022-12-14 04:53:08,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:53:08,018 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 293 transitions. [2022-12-14 04:53:08,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 21 states have internal predecessors, (68), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-14 04:53:08,018 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 293 transitions. [2022-12-14 04:53:08,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 04:53:08,018 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:53:08,019 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2022-12-14 04:53:08,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (116)] Forceful destruction successful, exit code 0 [2022-12-14 04:53:08,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (115)] Ended with exit code 0 [2022-12-14 04:53:08,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-12-14 04:53:08,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:53:08,620 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:53:08,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:53:08,621 INFO L85 PathProgramCache]: Analyzing trace with hash -791017244, now seen corresponding path program 2 times [2022-12-14 04:53:08,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:53:08,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [717200049] [2022-12-14 04:53:08,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 04:53:08,623 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:53:08,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:53:08,624 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:53:08,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (118)] Waiting until timeout for monitored process [2022-12-14 04:53:08,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 04:53:08,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:53:08,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 04:53:08,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:53:08,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:53:09,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-12-14 04:53:09,573 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 04:53:09,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:53:10,363 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 04:53:10,363 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:53:10,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [717200049] [2022-12-14 04:53:10,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [717200049] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:53:10,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [458753680] [2022-12-14 04:53:10,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 04:53:10,364 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:53:10,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:53:10,364 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:53:10,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (119)] Waiting until timeout for monitored process [2022-12-14 04:53:10,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 04:53:10,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:53:10,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 04:53:10,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:53:11,021 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 04:53:11,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:53:11,375 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 04:53:11,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [458753680] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:53:11,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416161810] [2022-12-14 04:53:11,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 04:53:11,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:53:11,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:53:11,376 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:53:11,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-12-14 04:53:11,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 04:53:11,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:53:11,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 04:53:11,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:53:11,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 04:53:12,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 04:53:12,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 04:53:12,744 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:53:12,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:53:14,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2022-12-14 04:53:15,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-12-14 04:53:15,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-12-14 04:53:15,849 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 04:53:15,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416161810] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:53:15,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 04:53:15,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 13, 10, 12, 11] total 50 [2022-12-14 04:53:15,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415972875] [2022-12-14 04:53:15,850 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 04:53:15,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-14 04:53:15,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:53:15,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-14 04:53:15,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2248, Unknown=1, NotChecked=0, Total=2450 [2022-12-14 04:53:15,851 INFO L87 Difference]: Start difference. First operand 242 states and 293 transitions. Second operand has 50 states, 50 states have (on average 3.16) internal successors, (158), 47 states have internal predecessors, (158), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2022-12-14 04:53:18,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:53:26,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:53:29,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:53:31,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:53:37,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:53:37,081 INFO L93 Difference]: Finished difference Result 433 states and 513 transitions. [2022-12-14 04:53:37,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-12-14 04:53:37,082 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.16) internal successors, (158), 47 states have internal predecessors, (158), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) Word has length 46 [2022-12-14 04:53:37,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:53:37,084 INFO L225 Difference]: With dead ends: 433 [2022-12-14 04:53:37,084 INFO L226 Difference]: Without dead ends: 433 [2022-12-14 04:53:37,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 219 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2177 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=1251, Invalid=8449, Unknown=2, NotChecked=0, Total=9702 [2022-12-14 04:53:37,085 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 1613 mSDsluCounter, 1228 mSDsCounter, 0 mSdLazyCounter, 1414 mSolverCounterSat, 96 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1613 SdHoareTripleChecker+Valid, 1277 SdHoareTripleChecker+Invalid, 1514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1414 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2022-12-14 04:53:37,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1613 Valid, 1277 Invalid, 1514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1414 Invalid, 4 Unknown, 0 Unchecked, 10.6s Time] [2022-12-14 04:53:37,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-12-14 04:53:37,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 369. [2022-12-14 04:53:37,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 338 states have (on average 1.3047337278106508) internal successors, (441), 348 states have internal predecessors, (441), 9 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (17), 15 states have call predecessors, (17), 9 states have call successors, (17) [2022-12-14 04:53:37,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 467 transitions. [2022-12-14 04:53:37,088 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 467 transitions. Word has length 46 [2022-12-14 04:53:37,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:53:37,089 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 467 transitions. [2022-12-14 04:53:37,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.16) internal successors, (158), 47 states have internal predecessors, (158), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2022-12-14 04:53:37,089 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 467 transitions. [2022-12-14 04:53:37,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 04:53:37,089 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:53:37,089 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 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, 1] [2022-12-14 04:53:37,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (119)] Ended with exit code 0 [2022-12-14 04:53:37,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-12-14 04:53:37,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (118)] Ended with exit code 0 [2022-12-14 04:53:37,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:53:37,692 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:53:37,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:53:37,693 INFO L85 PathProgramCache]: Analyzing trace with hash 424558363, now seen corresponding path program 2 times [2022-12-14 04:53:37,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:53:37,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1849475970] [2022-12-14 04:53:37,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 04:53:37,694 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:53:37,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:53:37,697 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:53:37,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (121)] Waiting until timeout for monitored process [2022-12-14 04:53:37,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 04:53:37,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:53:37,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 04:53:37,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:53:37,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:53:38,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 15 treesize of output 11 [2022-12-14 04:53:38,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-12-14 04:53:38,163 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| (_ bv1 1)) |c_#valid|)) is different from true [2022-12-14 04:53:38,196 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-12-14 04:53:38,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2022-12-14 04:53:38,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 04:53:38,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 04:53:38,328 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 2 not checked. [2022-12-14 04:53:38,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:53:41,464 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:53:41,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1849475970] [2022-12-14 04:53:41,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1849475970] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:53:41,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [982481721] [2022-12-14 04:53:41,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 04:53:41,465 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:53:41,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:53:41,466 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:53:41,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (122)] Waiting until timeout for monitored process [2022-12-14 04:53:41,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 04:53:41,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:53:41,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 04:53:41,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:53:41,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:53:42,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 15 treesize of output 11 [2022-12-14 04:53:42,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-12-14 04:53:42,203 INFO L321 Elim1Store]: treesize reduction 44, result has 26.7 percent of original size [2022-12-14 04:53:42,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 29 [2022-12-14 04:53:42,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:42,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 04:53:42,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 04:53:42,436 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 4 not checked. [2022-12-14 04:53:42,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:53:46,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [982481721] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:53:46,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884438417] [2022-12-14 04:53:46,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 04:53:46,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:53:46,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:53:46,834 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:53:46,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-12-14 04:53:46,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 04:53:46,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:53:46,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 04:53:46,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:53:47,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:53:47,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 15 treesize of output 11 [2022-12-14 04:53:47,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-12-14 04:53:47,127 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_2455 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_2455))))) is different from true [2022-12-14 04:53:47,165 INFO L321 Elim1Store]: treesize reduction 49, result has 38.0 percent of original size [2022-12-14 04:53:47,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 45 [2022-12-14 04:53:47,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:53:47,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 04:53:47,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-12-14 04:53:47,262 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 4 not checked. [2022-12-14 04:53:47,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:53:50,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884438417] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:53:50,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:53:50,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 15] total 24 [2022-12-14 04:53:50,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075407490] [2022-12-14 04:53:50,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:53:50,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 04:53:50,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:53:50,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 04:53:50,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=564, Unknown=4, NotChecked=98, Total=756 [2022-12-14 04:53:50,781 INFO L87 Difference]: Start difference. First operand 369 states and 467 transitions. Second operand has 25 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 22 states have internal predecessors, (68), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-14 04:53:54,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:53:54,343 INFO L93 Difference]: Finished difference Result 404 states and 502 transitions. [2022-12-14 04:53:54,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 04:53:54,343 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 22 states have internal predecessors, (68), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 48 [2022-12-14 04:53:54,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:53:54,344 INFO L225 Difference]: With dead ends: 404 [2022-12-14 04:53:54,344 INFO L226 Difference]: Without dead ends: 404 [2022-12-14 04:53:54,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 149 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=127, Invalid=807, Unknown=4, NotChecked=118, Total=1056 [2022-12-14 04:53:54,345 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 178 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 04:53:54,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 671 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 741 Invalid, 0 Unknown, 223 Unchecked, 1.3s Time] [2022-12-14 04:53:54,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-12-14 04:53:54,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 375. [2022-12-14 04:53:54,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 344 states have (on average 1.2994186046511629) internal successors, (447), 354 states have internal predecessors, (447), 9 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (17), 15 states have call predecessors, (17), 9 states have call successors, (17) [2022-12-14 04:53:54,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 473 transitions. [2022-12-14 04:53:54,350 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 473 transitions. Word has length 48 [2022-12-14 04:53:54,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:53:54,351 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 473 transitions. [2022-12-14 04:53:54,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 22 states have internal predecessors, (68), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-14 04:53:54,351 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 473 transitions. [2022-12-14 04:53:54,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 04:53:54,351 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:53:54,351 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:53:54,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-12-14 04:53:54,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (122)] Ended with exit code 0 [2022-12-14 04:53:54,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (121)] Forceful destruction successful, exit code 0 [2022-12-14 04:53:54,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:53:54,953 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:53:54,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:53:54,954 INFO L85 PathProgramCache]: Analyzing trace with hash -507079458, now seen corresponding path program 4 times [2022-12-14 04:53:54,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:53:54,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [579213925] [2022-12-14 04:53:54,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 04:53:54,956 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:53:54,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:53:54,958 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:53:54,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (124)] Waiting until timeout for monitored process [2022-12-14 04:53:55,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 04:53:55,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:53:55,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 04:53:55,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:53:55,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:53:55,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-12-14 04:53:56,341 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 04:53:56,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:53:57,242 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 04:53:57,242 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:53:57,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [579213925] [2022-12-14 04:53:57,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [579213925] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:53:57,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [17436437] [2022-12-14 04:53:57,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 04:53:57,242 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:53:57,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:53:57,243 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:53:57,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (125)] Waiting until timeout for monitored process [2022-12-14 04:53:57,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 04:53:57,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:53:57,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 04:53:57,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:53:58,014 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 04:53:58,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:53:58,409 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 04:53:58,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [17436437] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:53:58,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478025895] [2022-12-14 04:53:58,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 04:53:58,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:53:58,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:53:58,410 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:53:58,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-12-14 04:53:58,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 04:53:58,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:53:58,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 04:53:58,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:53:58,910 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 04:53:58,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:53:59,094 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 04:53:59,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478025895] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:53:59,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 04:53:59,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 13, 10, 13, 10] total 29 [2022-12-14 04:53:59,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578100517] [2022-12-14 04:53:59,095 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 04:53:59,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 04:53:59,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:53:59,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 04:53:59,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2022-12-14 04:53:59,095 INFO L87 Difference]: Start difference. First operand 375 states and 473 transitions. Second operand has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 28 states have internal predecessors, (75), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-12-14 04:54:02,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:54:02,990 INFO L93 Difference]: Finished difference Result 392 states and 450 transitions. [2022-12-14 04:54:02,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 04:54:02,992 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 28 states have internal predecessors, (75), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) Word has length 49 [2022-12-14 04:54:02,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:54:02,993 INFO L225 Difference]: With dead ends: 392 [2022-12-14 04:54:02,993 INFO L226 Difference]: Without dead ends: 392 [2022-12-14 04:54:02,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 259 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=393, Invalid=1863, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 04:54:02,994 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 774 mSDsluCounter, 1347 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 1433 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 04:54:02,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [774 Valid, 1433 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 04:54:02,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-12-14 04:54:02,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 317. [2022-12-14 04:54:02,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 288 states have (on average 1.2743055555555556) internal successors, (367), 299 states have internal predecessors, (367), 7 states have call successors, (7), 5 states have call predecessors, (7), 8 states have return successors, (13), 12 states have call predecessors, (13), 7 states have call successors, (13) [2022-12-14 04:54:02,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 387 transitions. [2022-12-14 04:54:02,997 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 387 transitions. Word has length 49 [2022-12-14 04:54:02,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:54:02,997 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 387 transitions. [2022-12-14 04:54:02,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 28 states have internal predecessors, (75), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-12-14 04:54:02,998 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 387 transitions. [2022-12-14 04:54:02,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 04:54:02,998 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:54:02,998 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2022-12-14 04:54:03,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-12-14 04:54:03,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (124)] Ended with exit code 0 [2022-12-14 04:54:03,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (125)] Ended with exit code 0 [2022-12-14 04:54:03,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 04:54:03,600 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:54:03,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:54:03,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1229413940, now seen corresponding path program 1 times [2022-12-14 04:54:03,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:54:03,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [274202734] [2022-12-14 04:54:03,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:54:03,602 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:54:03,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:54:03,603 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:54:03,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (127)] Waiting until timeout for monitored process [2022-12-14 04:54:03,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:54:04,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 04:54:04,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:54:04,078 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 04:54:04,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:54:04,261 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 04:54:04,261 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:54:04,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [274202734] [2022-12-14 04:54:04,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [274202734] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:54:04,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [249090606] [2022-12-14 04:54:04,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:54:04,262 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:54:04,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:54:04,263 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:54:04,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (128)] Waiting until timeout for monitored process [2022-12-14 04:54:04,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:54:04,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 04:54:04,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:54:04,599 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 04:54:04,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:54:04,691 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 04:54:04,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [249090606] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:54:04,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221122571] [2022-12-14 04:54:04,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:54:04,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:54:04,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:54:04,693 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:54:04,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-12-14 04:54:04,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:54:04,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 04:54:04,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:54:04,856 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 04:54:04,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:54:05,116 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 04:54:05,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221122571] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:54:05,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 04:54:05,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 7] total 13 [2022-12-14 04:54:05,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758568145] [2022-12-14 04:54:05,117 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 04:54:05,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 04:54:05,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:54:05,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 04:54:05,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-12-14 04:54:05,118 INFO L87 Difference]: Start difference. First operand 317 states and 387 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 04:54:05,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:54:05,387 INFO L93 Difference]: Finished difference Result 383 states and 447 transitions. [2022-12-14 04:54:05,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 04:54:05,389 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 48 [2022-12-14 04:54:05,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:54:05,390 INFO L225 Difference]: With dead ends: 383 [2022-12-14 04:54:05,390 INFO L226 Difference]: Without dead ends: 383 [2022-12-14 04:54:05,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-12-14 04:54:05,390 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 277 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 04:54:05,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 649 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 04:54:05,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-12-14 04:54:05,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 307. [2022-12-14 04:54:05,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 278 states have (on average 1.2410071942446044) internal successors, (345), 289 states have internal predecessors, (345), 7 states have call successors, (7), 5 states have call predecessors, (7), 8 states have return successors, (13), 12 states have call predecessors, (13), 7 states have call successors, (13) [2022-12-14 04:54:05,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 365 transitions. [2022-12-14 04:54:05,396 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 365 transitions. Word has length 48 [2022-12-14 04:54:05,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:54:05,397 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 365 transitions. [2022-12-14 04:54:05,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 04:54:05,397 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 365 transitions. [2022-12-14 04:54:05,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 04:54:05,398 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:54:05,398 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:54:05,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-12-14 04:54:05,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (127)] Forceful destruction successful, exit code 0 [2022-12-14 04:54:05,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (128)] Ended with exit code 0 [2022-12-14 04:54:05,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 04:54:06,000 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:54:06,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:54:06,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1289498600, now seen corresponding path program 2 times [2022-12-14 04:54:06,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:54:06,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2142714937] [2022-12-14 04:54:06,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 04:54:06,003 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:54:06,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:54:06,006 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:54:06,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (130)] Waiting until timeout for monitored process [2022-12-14 04:54:06,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 04:54:06,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:54:06,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 04:54:06,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:54:06,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 13 treesize of output 9 [2022-12-14 04:54:06,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:54:06,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-12-14 04:54:06,652 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 04:54:06,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 24 [2022-12-14 04:54:06,708 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:54:06,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:54:07,002 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:54:07,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 196 [2022-12-14 04:54:07,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-12-14 04:54:07,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-12-14 04:54:07,624 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 04:54:07,624 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:54:07,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2142714937] [2022-12-14 04:54:07,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2142714937] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:54:07,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1793279232] [2022-12-14 04:54:07,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 04:54:07,624 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:54:07,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:54:07,625 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:54:07,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (131)] Waiting until timeout for monitored process [2022-12-14 04:54:07,856 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 04:54:07,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306397665] [2022-12-14 04:54:07,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 04:54:07,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:54:07,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:54:07,857 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:54:07,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (131)] Ended with exit code 1 [2022-12-14 04:54:07,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-12-14 04:54:08,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 04:54:08,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:54:08,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 04:54:08,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:54:08,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 13 treesize of output 9 [2022-12-14 04:54:08,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-12-14 04:54:08,473 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 04:54:08,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 24 [2022-12-14 04:54:08,509 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:54:08,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:54:08,742 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:54:08,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 52 [2022-12-14 04:54:09,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-12-14 04:54:09,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-12-14 04:54:09,397 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 04:54:09,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306397665] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:54:09,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-12-14 04:54:09,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9] total 23 [2022-12-14 04:54:09,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999578094] [2022-12-14 04:54:09,398 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-12-14 04:54:09,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 04:54:09,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:54:09,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 04:54:09,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-12-14 04:54:09,399 INFO L87 Difference]: Start difference. First operand 307 states and 365 transitions. Second operand has 24 states, 23 states have (on average 4.695652173913044) internal successors, (108), 24 states have internal predecessors, (108), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 04:54:11,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:54:14,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:54:16,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:54:17,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:54:17,297 INFO L93 Difference]: Finished difference Result 339 states and 396 transitions. [2022-12-14 04:54:17,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 04:54:17,298 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.695652173913044) internal successors, (108), 24 states have internal predecessors, (108), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 49 [2022-12-14 04:54:17,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:54:17,300 INFO L225 Difference]: With dead ends: 339 [2022-12-14 04:54:17,300 INFO L226 Difference]: Without dead ends: 339 [2022-12-14 04:54:17,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 167 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 04:54:17,300 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 155 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 10 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-12-14 04:54:17,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 651 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 440 Invalid, 3 Unknown, 0 Unchecked, 7.2s Time] [2022-12-14 04:54:17,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-12-14 04:54:17,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 313. [2022-12-14 04:54:17,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 284 states have (on average 1.2359154929577465) internal successors, (351), 295 states have internal predecessors, (351), 7 states have call successors, (7), 5 states have call predecessors, (7), 8 states have return successors, (13), 12 states have call predecessors, (13), 7 states have call successors, (13) [2022-12-14 04:54:17,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 371 transitions. [2022-12-14 04:54:17,304 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 371 transitions. Word has length 49 [2022-12-14 04:54:17,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:54:17,304 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 371 transitions. [2022-12-14 04:54:17,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.695652173913044) internal successors, (108), 24 states have internal predecessors, (108), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 04:54:17,304 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 371 transitions. [2022-12-14 04:54:17,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 04:54:17,305 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:54:17,305 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2022-12-14 04:54:17,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (130)] Ended with exit code 0 [2022-12-14 04:54:17,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-12-14 04:54:17,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:54:17,707 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:54:17,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:54:17,708 INFO L85 PathProgramCache]: Analyzing trace with hash -854565691, now seen corresponding path program 2 times [2022-12-14 04:54:17,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:54:17,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [147509964] [2022-12-14 04:54:17,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 04:54:17,709 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:54:17,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:54:17,710 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:54:17,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (133)] Waiting until timeout for monitored process [2022-12-14 04:54:17,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 04:54:17,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:54:17,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 04:54:17,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:54:18,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:54:19,427 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:54:19,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:54:27,589 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:54:27,589 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:54:27,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [147509964] [2022-12-14 04:54:27,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [147509964] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:54:27,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1846530531] [2022-12-14 04:54:27,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 04:54:27,590 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:54:27,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:54:27,591 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:54:27,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (134)] Waiting until timeout for monitored process [2022-12-14 04:54:27,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 04:54:27,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:54:27,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 04:54:27,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:54:27,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:54:30,394 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:54:30,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:54:37,583 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:54:37,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1846530531] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:54:37,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768723018] [2022-12-14 04:54:37,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 04:54:37,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:54:37,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:54:37,585 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:54:37,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-12-14 04:54:37,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 04:54:37,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:54:37,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 04:54:37,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:54:37,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:54:38,746 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:54:38,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:54:47,339 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:54:47,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768723018] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:54:47,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 04:54:47,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 19, 16, 18, 16] total 63 [2022-12-14 04:54:47,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367877112] [2022-12-14 04:54:47,340 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 04:54:47,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-12-14 04:54:47,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:54:47,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-12-14 04:54:47,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=3626, Unknown=2, NotChecked=0, Total=4032 [2022-12-14 04:54:47,342 INFO L87 Difference]: Start difference. First operand 313 states and 371 transitions. Second operand has 64 states, 62 states have (on average 2.8225806451612905) internal successors, (175), 59 states have internal predecessors, (175), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2022-12-14 04:55:16,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:55:16,842 INFO L93 Difference]: Finished difference Result 531 states and 591 transitions. [2022-12-14 04:55:16,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-14 04:55:16,844 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 62 states have (on average 2.8225806451612905) internal successors, (175), 59 states have internal predecessors, (175), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) Word has length 49 [2022-12-14 04:55:16,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:55:16,845 INFO L225 Difference]: With dead ends: 531 [2022-12-14 04:55:16,845 INFO L226 Difference]: Without dead ends: 531 [2022-12-14 04:55:16,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 225 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2648 ImplicationChecksByTransitivity, 37.7s TimeCoverageRelationStatistics Valid=1479, Invalid=9025, Unknown=2, NotChecked=0, Total=10506 [2022-12-14 04:55:16,846 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 1666 mSDsluCounter, 2793 mSDsCounter, 0 mSdLazyCounter, 2926 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1666 SdHoareTripleChecker+Valid, 2902 SdHoareTripleChecker+Invalid, 3044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 2926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2022-12-14 04:55:16,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1666 Valid, 2902 Invalid, 3044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 2926 Invalid, 0 Unknown, 0 Unchecked, 14.4s Time] [2022-12-14 04:55:16,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-12-14 04:55:16,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 354. [2022-12-14 04:55:16,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 324 states have (on average 1.2561728395061729) internal successors, (407), 335 states have internal predecessors, (407), 8 states have call successors, (8), 5 states have call predecessors, (8), 8 states have return successors, (15), 13 states have call predecessors, (15), 8 states have call successors, (15) [2022-12-14 04:55:16,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 430 transitions. [2022-12-14 04:55:16,851 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 430 transitions. Word has length 49 [2022-12-14 04:55:16,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:55:16,851 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 430 transitions. [2022-12-14 04:55:16,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 62 states have (on average 2.8225806451612905) internal successors, (175), 59 states have internal predecessors, (175), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2022-12-14 04:55:16,851 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 430 transitions. [2022-12-14 04:55:16,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 04:55:16,852 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:55:16,852 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 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, 1, 1] [2022-12-14 04:55:16,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (133)] Ended with exit code 0 [2022-12-14 04:55:17,057 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-12-14 04:55:17,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (134)] Ended with exit code 0 [2022-12-14 04:55:17,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 04:55:17,454 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:55:17,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:55:17,455 INFO L85 PathProgramCache]: Analyzing trace with hash -660349958, now seen corresponding path program 2 times [2022-12-14 04:55:17,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:55:17,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [770047107] [2022-12-14 04:55:17,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 04:55:17,457 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:55:17,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:55:17,458 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:55:17,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (136)] Waiting until timeout for monitored process [2022-12-14 04:55:17,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 04:55:17,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:55:17,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 04:55:17,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:55:17,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:55:17,843 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 04:55:17,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 04:55:17,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 04:55:20,146 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_117| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_107| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_117| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_117|) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_107|)))) is different from true [2022-12-14 04:55:20,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-12-14 04:55:20,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-12-14 04:55:20,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 04:55:20,542 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 6 not checked. [2022-12-14 04:55:20,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:55:20,803 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:55:20,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 43 [2022-12-14 04:55:21,010 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:55:21,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [770047107] [2022-12-14 04:55:21,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [770047107] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:55:21,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [422632615] [2022-12-14 04:55:21,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 04:55:21,010 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:55:21,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:55:21,011 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:55:21,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (137)] Waiting until timeout for monitored process [2022-12-14 04:55:21,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 04:55:21,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:55:21,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 04:55:21,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:55:21,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 04:55:21,763 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 04:55:21,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 04:55:21,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 04:55:24,240 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_119| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_119| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_119|) (_ bv0 32))))) is different from true [2022-12-14 04:55:24,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:24,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-12-14 04:55:24,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-12-14 04:55:24,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 04:55:24,706 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2022-12-14 04:55:24,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:55:24,892 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:55:24,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 43 [2022-12-14 04:55:25,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [422632615] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:55:25,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092658719] [2022-12-14 04:55:25,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 04:55:25,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:55:25,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:55:25,070 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:55:25,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-12-14 04:55:25,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 04:55:25,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:55:25,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 04:55:25,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:55:25,546 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 04:55:25,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 04:55:25,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 04:55:27,748 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_121| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_121| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_121|) (_ bv0 32))))) is different from true [2022-12-14 04:55:27,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:27,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-12-14 04:55:28,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-12-14 04:55:28,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 04:55:28,194 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 6 not checked. [2022-12-14 04:55:28,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:55:28,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-14 04:55:28,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092658719] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:55:28,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:55:28,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 34 [2022-12-14 04:55:28,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926185609] [2022-12-14 04:55:28,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:55:28,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 04:55:28,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:55:28,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 04:55:28,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1207, Unknown=3, NotChecked=216, Total=1560 [2022-12-14 04:55:28,785 INFO L87 Difference]: Start difference. First operand 354 states and 430 transitions. Second operand has 35 states, 34 states have (on average 2.588235294117647) internal successors, (88), 30 states have internal predecessors, (88), 5 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 04:55:45,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:55:45,826 INFO L93 Difference]: Finished difference Result 401 states and 478 transitions. [2022-12-14 04:55:45,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-14 04:55:45,826 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.588235294117647) internal successors, (88), 30 states have internal predecessors, (88), 5 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) Word has length 51 [2022-12-14 04:55:45,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:55:45,828 INFO L225 Difference]: With dead ends: 401 [2022-12-14 04:55:45,828 INFO L226 Difference]: Without dead ends: 401 [2022-12-14 04:55:45,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 153 SyntacticMatches, 8 SemanticMatches, 54 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=292, Invalid=2470, Unknown=6, NotChecked=312, Total=3080 [2022-12-14 04:55:45,829 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 268 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 1646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 444 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:55:45,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 1006 Invalid, 1646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1165 Invalid, 0 Unknown, 444 Unchecked, 2.1s Time] [2022-12-14 04:55:45,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-12-14 04:55:45,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 362. [2022-12-14 04:55:45,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 331 states have (on average 1.2537764350453173) internal successors, (415), 343 states have internal predecessors, (415), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (15), 13 states have call predecessors, (15), 8 states have call successors, (15) [2022-12-14 04:55:45,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 438 transitions. [2022-12-14 04:55:45,833 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 438 transitions. Word has length 51 [2022-12-14 04:55:45,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:55:45,833 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 438 transitions. [2022-12-14 04:55:45,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.588235294117647) internal successors, (88), 30 states have internal predecessors, (88), 5 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 04:55:45,833 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 438 transitions. [2022-12-14 04:55:45,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 04:55:45,833 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:55:45,833 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 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, 1, 1] [2022-12-14 04:55:45,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (137)] Ended with exit code 0 [2022-12-14 04:55:46,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-12-14 04:55:46,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (136)] Ended with exit code 0 [2022-12-14 04:55:46,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,138 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:55:46,436 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:55:46,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:55:46,437 INFO L85 PathProgramCache]: Analyzing trace with hash -660349957, now seen corresponding path program 1 times [2022-12-14 04:55:46,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:55:46,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1517236274] [2022-12-14 04:55:46,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:55:46,438 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:55:46,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:55:46,441 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:55:46,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (139)] Waiting until timeout for monitored process [2022-12-14 04:55:46,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:55:46,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 04:55:46,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:55:47,039 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 04:55:47,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:55:47,456 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:55:47,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-12-14 04:55:48,177 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 04:55:48,178 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:55:48,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1517236274] [2022-12-14 04:55:48,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1517236274] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:55:48,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1231029202] [2022-12-14 04:55:48,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:55:48,178 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:55:48,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:55:48,179 INFO L229 MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:55:48,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (140)] Waiting until timeout for monitored process [2022-12-14 04:55:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:55:48,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 04:55:48,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:55:48,742 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 04:55:48,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:55:48,922 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:55:48,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-12-14 04:55:49,332 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 04:55:49,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1231029202] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:55:49,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212349120] [2022-12-14 04:55:49,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:55:49,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:55:49,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:55:49,333 INFO L229 MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:55:49,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-12-14 04:55:49,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:55:49,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 04:55:49,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:55:49,733 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 04:55:49,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:55:49,896 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:55:49,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-12-14 04:55:50,319 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 04:55:50,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212349120] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:55:50,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 04:55:50,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 17 [2022-12-14 04:55:50,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327621504] [2022-12-14 04:55:50,319 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 04:55:50,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 04:55:50,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:55:50,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 04:55:50,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-12-14 04:55:50,320 INFO L87 Difference]: Start difference. First operand 362 states and 438 transitions. Second operand has 18 states, 17 states have (on average 4.0) internal successors, (68), 16 states have internal predecessors, (68), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-14 04:55:54,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:55:54,997 INFO L93 Difference]: Finished difference Result 628 states and 712 transitions. [2022-12-14 04:55:54,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 04:55:54,998 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.0) internal successors, (68), 16 states have internal predecessors, (68), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 51 [2022-12-14 04:55:54,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:55:54,999 INFO L225 Difference]: With dead ends: 628 [2022-12-14 04:55:54,999 INFO L226 Difference]: Without dead ends: 628 [2022-12-14 04:55:55,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 282 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=281, Invalid=1051, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 04:55:55,000 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 805 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:55:55,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [806 Valid, 891 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-12-14 04:55:55,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-12-14 04:55:55,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 383. [2022-12-14 04:55:55,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 351 states have (on average 1.2507122507122508) internal successors, (439), 362 states have internal predecessors, (439), 9 states have call successors, (9), 5 states have call predecessors, (9), 9 states have return successors, (17), 15 states have call predecessors, (17), 9 states have call successors, (17) [2022-12-14 04:55:55,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 465 transitions. [2022-12-14 04:55:55,004 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 465 transitions. Word has length 51 [2022-12-14 04:55:55,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:55:55,005 INFO L495 AbstractCegarLoop]: Abstraction has 383 states and 465 transitions. [2022-12-14 04:55:55,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.0) internal successors, (68), 16 states have internal predecessors, (68), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-14 04:55:55,005 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 465 transitions. [2022-12-14 04:55:55,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 04:55:55,005 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:55:55,005 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:55:55,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (140)] Ended with exit code 0 [2022-12-14 04:55:55,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-12-14 04:55:55,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (139)] Ended with exit code 0 [2022-12-14 04:55:55,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,141 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,139 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:55:55,608 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:55:55,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:55:55,609 INFO L85 PathProgramCache]: Analyzing trace with hash 401683710, now seen corresponding path program 5 times [2022-12-14 04:55:55,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:55:55,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [449437680] [2022-12-14 04:55:55,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 04:55:55,609 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:55:55,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:55:55,610 INFO L229 MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:55:55,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (142)] Waiting until timeout for monitored process [2022-12-14 04:55:55,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-12-14 04:55:55,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:55:55,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-14 04:55:55,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:55:55,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:55:56,967 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_3015 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_3015) |c_#length|)))) is different from true [2022-12-14 04:55:56,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:56,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-12-14 04:55:57,015 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 04:55:57,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 04:55:57,452 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_3016 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_3016) |c_#length|)))) is different from true [2022-12-14 04:55:57,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:57,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-12-14 04:55:57,498 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 04:55:57,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 04:55:57,912 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_3017 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_3017))))) is different from true [2022-12-14 04:55:57,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:55:57,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-12-14 04:55:57,973 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 04:55:57,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 04:55:58,102 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 12 not checked. [2022-12-14 04:55:58,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:56:02,685 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:56:02,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [449437680] [2022-12-14 04:56:02,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [449437680] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:56:02,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1733336290] [2022-12-14 04:56:02,685 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 04:56:02,685 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:56:02,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:56:02,686 INFO L229 MonitoredProcess]: Starting monitored process 143 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:56:02,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (143)] Waiting until timeout for monitored process [2022-12-14 04:56:03,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-12-14 04:56:03,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:56:03,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-14 04:56:03,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:56:03,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:56:04,485 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_3060 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_3060))) (exists ((v_ArrVal_3061 (_ BitVec 1))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_3061) |c_#valid|)))) is different from true [2022-12-14 04:56:04,544 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 04:56:04,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 04:56:04,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 04:56:04,824 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_3062 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_3062) |c_#length|)))) is different from true [2022-12-14 04:56:04,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:56:04,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 04:56:04,861 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 04:56:04,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 04:56:05,229 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_3063 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_3063) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-12-14 04:56:05,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:56:05,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 04:56:05,283 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 04:56:05,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 04:56:05,428 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 12 not checked. [2022-12-14 04:56:05,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:56:05,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1733336290] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:56:05,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136288263] [2022-12-14 04:56:05,785 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 04:56:05,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:56:05,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:56:05,786 INFO L229 MonitoredProcess]: Starting monitored process 144 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:56:05,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-12-14 04:56:06,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-12-14 04:56:06,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:56:06,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-14 04:56:06,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:56:06,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:56:08,287 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_3106 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_3106) |c_#length|)))) is different from true [2022-12-14 04:56:08,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:56:08,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 04:56:08,320 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 04:56:08,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 04:56:08,601 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_3107 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_3107) |c_#length|)))) is different from true [2022-12-14 04:56:08,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:56:08,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 04:56:08,649 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 04:56:08,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 04:56:08,787 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_3108 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_3108) |c_#length|)))) is different from true [2022-12-14 04:56:08,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:56:08,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 04:56:08,823 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 04:56:08,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 04:56:08,866 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 12 not checked. [2022-12-14 04:56:08,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:56:09,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136288263] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:56:09,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:56:09,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 26] total 59 [2022-12-14 04:56:09,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238245038] [2022-12-14 04:56:09,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:56:09,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-12-14 04:56:09,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:56:09,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-12-14 04:56:09,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=2491, Unknown=10, NotChecked=990, Total=3782 [2022-12-14 04:56:09,218 INFO L87 Difference]: Start difference. First operand 383 states and 465 transitions. Second operand has 60 states, 57 states have (on average 1.7894736842105263) internal successors, (102), 57 states have internal predecessors, (102), 9 states have call successors, (9), 2 states have call predecessors, (9), 10 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2022-12-14 04:56:20,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:56:20,014 INFO L93 Difference]: Finished difference Result 671 states and 762 transitions. [2022-12-14 04:56:20,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-14 04:56:20,015 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 57 states have (on average 1.7894736842105263) internal successors, (102), 57 states have internal predecessors, (102), 9 states have call successors, (9), 2 states have call predecessors, (9), 10 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) Word has length 52 [2022-12-14 04:56:20,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:56:20,016 INFO L225 Difference]: With dead ends: 671 [2022-12-14 04:56:20,016 INFO L226 Difference]: Without dead ends: 671 [2022-12-14 04:56:20,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 101 SyntacticMatches, 4 SemanticMatches, 92 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 2102 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=817, Invalid=6349, Unknown=10, NotChecked=1566, Total=8742 [2022-12-14 04:56:20,017 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 1651 mSDsluCounter, 2147 mSDsCounter, 0 mSdLazyCounter, 2766 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1651 SdHoareTripleChecker+Valid, 2260 SdHoareTripleChecker+Invalid, 6023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 2766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3127 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-12-14 04:56:20,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1651 Valid, 2260 Invalid, 6023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 2766 Invalid, 0 Unknown, 3127 Unchecked, 6.7s Time] [2022-12-14 04:56:20,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2022-12-14 04:56:20,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 383. [2022-12-14 04:56:20,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 351 states have (on average 1.2478632478632479) internal successors, (438), 362 states have internal predecessors, (438), 9 states have call successors, (9), 5 states have call predecessors, (9), 9 states have return successors, (17), 15 states have call predecessors, (17), 9 states have call successors, (17) [2022-12-14 04:56:20,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 464 transitions. [2022-12-14 04:56:20,023 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 464 transitions. Word has length 52 [2022-12-14 04:56:20,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:56:20,023 INFO L495 AbstractCegarLoop]: Abstraction has 383 states and 464 transitions. [2022-12-14 04:56:20,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 57 states have (on average 1.7894736842105263) internal successors, (102), 57 states have internal predecessors, (102), 9 states have call successors, (9), 2 states have call predecessors, (9), 10 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2022-12-14 04:56:20,023 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 464 transitions. [2022-12-14 04:56:20,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 04:56:20,024 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:56:20,024 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 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] [2022-12-14 04:56:20,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-12-14 04:56:20,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (142)] Ended with exit code 0 [2022-12-14 04:56:20,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (143)] Ended with exit code 0 [2022-12-14 04:56:20,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,142 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,143 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 04:56:20,626 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:56:20,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:56:20,627 INFO L85 PathProgramCache]: Analyzing trace with hash -721732598, now seen corresponding path program 2 times [2022-12-14 04:56:20,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:56:20,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1734018081] [2022-12-14 04:56:20,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 04:56:20,628 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:56:20,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:56:20,631 INFO L229 MonitoredProcess]: Starting monitored process 145 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:56:20,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (145)] Waiting until timeout for monitored process [2022-12-14 04:56:20,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 04:56:20,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:56:20,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 04:56:20,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:56:20,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 13 treesize of output 9 [2022-12-14 04:56:21,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-12-14 04:56:21,281 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:56:21,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:56:27,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-12-14 04:56:27,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-12-14 04:56:27,713 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 04:56:27,714 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:56:27,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1734018081] [2022-12-14 04:56:27,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1734018081] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:56:27,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [448093694] [2022-12-14 04:56:27,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 04:56:27,714 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:56:27,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:56:27,715 INFO L229 MonitoredProcess]: Starting monitored process 146 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:56:27,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (146)] Waiting until timeout for monitored process [2022-12-14 04:56:27,974 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 04:56:27,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338116613] [2022-12-14 04:56:27,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 04:56:27,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:56:27,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:56:27,975 INFO L229 MonitoredProcess]: Starting monitored process 147 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:56:27,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-12-14 04:56:27,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (146)] Ended with exit code 1 [2022-12-14 04:56:28,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 04:56:28,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:56:28,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 04:56:28,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:56:28,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 04:56:29,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 13 treesize of output 9 [2022-12-14 04:56:29,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 04:56:30,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 04:56:30,674 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:56:30,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:56:31,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-12-14 04:56:31,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-12-14 04:56:32,828 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:56:32,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338116613] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:56:32,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-12-14 04:56:32,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 17, 10] total 39 [2022-12-14 04:56:32,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323132292] [2022-12-14 04:56:32,829 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-12-14 04:56:32,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-14 04:56:32,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:56:32,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-14 04:56:32,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1426, Unknown=3, NotChecked=0, Total=1560 [2022-12-14 04:56:32,829 INFO L87 Difference]: Start difference. First operand 383 states and 464 transitions. Second operand has 40 states, 38 states have (on average 3.9473684210526314) internal successors, (150), 39 states have internal predecessors, (150), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-14 04:56:36,306 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 [0, 1] [2022-12-14 04:56:39,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:56:41,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:56:44,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 04:56:47,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:56:49,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:56:53,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:56:57,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:56:59,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 04:56:59,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:56:59,470 INFO L93 Difference]: Finished difference Result 443 states and 518 transitions. [2022-12-14 04:56:59,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-14 04:56:59,472 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 3.9473684210526314) internal successors, (150), 39 states have internal predecessors, (150), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 50 [2022-12-14 04:56:59,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:56:59,473 INFO L225 Difference]: With dead ends: 443 [2022-12-14 04:56:59,473 INFO L226 Difference]: Without dead ends: 443 [2022-12-14 04:56:59,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 157 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=499, Invalid=4190, Unknown=3, NotChecked=0, Total=4692 [2022-12-14 04:56:59,473 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 651 mSDsluCounter, 1494 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 44 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 1592 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:56:59,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [651 Valid, 1592 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1180 Invalid, 10 Unknown, 0 Unchecked, 22.0s Time] [2022-12-14 04:56:59,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-12-14 04:56:59,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 390. [2022-12-14 04:56:59,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 356 states have (on average 1.2443820224719102) internal successors, (443), 368 states have internal predecessors, (443), 9 states have call successors, (9), 6 states have call predecessors, (9), 11 states have return successors, (17), 15 states have call predecessors, (17), 9 states have call successors, (17) [2022-12-14 04:56:59,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 469 transitions. [2022-12-14 04:56:59,478 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 469 transitions. Word has length 50 [2022-12-14 04:56:59,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:56:59,478 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 469 transitions. [2022-12-14 04:56:59,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 3.9473684210526314) internal successors, (150), 39 states have internal predecessors, (150), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-14 04:56:59,478 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 469 transitions. [2022-12-14 04:56:59,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 04:56:59,478 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:56:59,478 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 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, 1] [2022-12-14 04:56:59,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-12-14 04:56:59,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (145)] Ended with exit code 0 [2022-12-14 04:56:59,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,145 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:56:59,880 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:56:59,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:56:59,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1003987860, now seen corresponding path program 1 times [2022-12-14 04:56:59,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:56:59,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [514947399] [2022-12-14 04:56:59,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:56:59,882 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:56:59,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:56:59,883 INFO L229 MonitoredProcess]: Starting monitored process 148 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:56:59,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (148)] Waiting until timeout for monitored process [2022-12-14 04:57:00,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:57:00,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 04:57:00,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:57:00,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 13 treesize of output 9 [2022-12-14 04:57:00,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-12-14 04:57:00,532 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 04:57:00,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:57:00,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-12-14 04:57:01,161 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 04:57:01,161 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:57:01,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [514947399] [2022-12-14 04:57:01,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [514947399] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:57:01,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1497710001] [2022-12-14 04:57:01,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:57:01,161 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:57:01,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:57:01,162 INFO L229 MonitoredProcess]: Starting monitored process 149 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:57:01,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (149)] Waiting until timeout for monitored process [2022-12-14 04:57:01,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:57:01,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 04:57:01,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:57:02,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 13 treesize of output 9 [2022-12-14 04:57:02,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 04:57:02,429 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 04:57:02,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:57:02,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-12-14 04:57:02,684 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 04:57:02,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1497710001] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:57:02,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081314499] [2022-12-14 04:57:02,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:57:02,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:57:02,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:57:02,685 INFO L229 MonitoredProcess]: Starting monitored process 150 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:57:02,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-12-14 04:57:02,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:57:02,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 04:57:02,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:57:03,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 13 treesize of output 9 [2022-12-14 04:57:03,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 04:57:03,186 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 04:57:03,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:57:03,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-12-14 04:57:03,455 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 04:57:03,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081314499] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:57:03,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 04:57:03,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13, 10, 12, 10] total 27 [2022-12-14 04:57:03,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719061299] [2022-12-14 04:57:03,456 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 04:57:03,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-14 04:57:03,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 04:57:03,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-14 04:57:03,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2022-12-14 04:57:03,458 INFO L87 Difference]: Start difference. First operand 390 states and 469 transitions. Second operand has 28 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 24 states have internal predecessors, (94), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-14 04:57:06,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:57:06,126 INFO L93 Difference]: Finished difference Result 488 states and 566 transitions. [2022-12-14 04:57:06,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 04:57:06,127 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 24 states have internal predecessors, (94), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 52 [2022-12-14 04:57:06,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:57:06,128 INFO L225 Difference]: With dead ends: 488 [2022-12-14 04:57:06,128 INFO L226 Difference]: Without dead ends: 488 [2022-12-14 04:57:06,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=172, Invalid=1160, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 04:57:06,129 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 369 mSDsluCounter, 1161 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 1260 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:57:06,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 1260 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-12-14 04:57:06,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-12-14 04:57:06,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 394. [2022-12-14 04:57:06,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 360 states have (on average 1.2444444444444445) internal successors, (448), 372 states have internal predecessors, (448), 9 states have call successors, (9), 6 states have call predecessors, (9), 11 states have return successors, (17), 15 states have call predecessors, (17), 9 states have call successors, (17) [2022-12-14 04:57:06,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 474 transitions. [2022-12-14 04:57:06,134 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 474 transitions. Word has length 52 [2022-12-14 04:57:06,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:57:06,134 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 474 transitions. [2022-12-14 04:57:06,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 24 states have internal predecessors, (94), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-14 04:57:06,134 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 474 transitions. [2022-12-14 04:57:06,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 04:57:06,134 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:57:06,134 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:57:06,143 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (148)] Ended with exit code 0 [2022-12-14 04:57:06,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2022-12-14 04:57:06,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (149)] Ended with exit code 0 [2022-12-14 04:57:06,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,150 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,149 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 04:57:06,737 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 04:57:06,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:57:06,738 INFO L85 PathProgramCache]: Analyzing trace with hash -2037388821, now seen corresponding path program 2 times [2022-12-14 04:57:06,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 04:57:06,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1456647119] [2022-12-14 04:57:06,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 04:57:06,739 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 04:57:06,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 04:57:06,740 INFO L229 MonitoredProcess]: Starting monitored process 151 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 04:57:06,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (151)] Waiting until timeout for monitored process [2022-12-14 04:57:07,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 04:57:07,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:57:07,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 04:57:07,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:57:07,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 04:57:07,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 04:57:07,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 04:57:08,904 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:57:08,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2022-12-14 04:57:09,134 WARN L859 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32))) (exists ((|ULTIMATE.start_entry_point_~array~0#1.base| (_ BitVec 32))) (and (= (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 1)) |c_#valid|) (not (= |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 32))) (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base|) (_ bv0 1))))) is different from true [2022-12-14 04:57:09,148 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:57:09,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:57:09,516 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3305 (_ BitVec 1))) (= (store (store (store |c_#valid| |c_ULTIMATE.start_free_17_#t~mem43#1.base| v_ArrVal_3305) (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_free_17_~array#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_free_17_~array#1.offset| (bvmul (_ bv4 32) |c_ULTIMATE.start_free_17_~i~1#1|))) (_ bv0 1)) |c_ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 1)) |c_ULTIMATE.start_main_old_#valid#1|)) is different from false [2022-12-14 04:57:09,545 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3305 (_ BitVec 1))) (= (store (let ((.cse0 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_free_17_~array#1.base|)) (.cse1 (bvmul (_ bv4 32) |c_ULTIMATE.start_free_17_~i~1#1|))) (store (store |c_#valid| (select .cse0 (bvadd |c_ULTIMATE.start_free_17_~array#1.offset| .cse1)) v_ArrVal_3305) (select .cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_free_17_~array#1.offset| .cse1)) (_ bv0 1))) |c_ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 1)) |c_ULTIMATE.start_main_old_#valid#1|)) is different from false [2022-12-14 04:57:09,566 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3305 (_ BitVec 1))) (= |c_ULTIMATE.start_main_old_#valid#1| (store (let ((.cse0 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~array~0#1.base|))) (store (store |c_#valid| (select .cse0 |c_ULTIMATE.start_entry_point_~array~0#1.offset|) v_ArrVal_3305) (select .cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_entry_point_~array~0#1.offset|)) (_ bv0 1))) |c_ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 1)))) is different from false [2022-12-14 04:57:09,621 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 04:57:09,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1456647119] [2022-12-14 04:57:09,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1456647119] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:57:09,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [14325356] [2022-12-14 04:57:09,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 04:57:09,621 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 04:57:09,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 04:57:09,622 INFO L229 MonitoredProcess]: Starting monitored process 152 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 04:57:09,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (152)] Waiting until timeout for monitored process [2022-12-14 04:57:09,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 04:57:09,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:57:09,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 04:57:09,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:57:10,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 15 treesize of output 11 [2022-12-14 04:57:10,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 04:57:10,809 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-14 04:57:10,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 04:57:14,120 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:57:14,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2022-12-14 04:57:14,430 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3325 (_ BitVec 1)) (|ULTIMATE.start_entry_point_~array~0#1.base| (_ BitVec 32))) (and (= |c_#valid| (store (store (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base| v_ArrVal_3325) (_ bv0 32) (_ bv0 1)) |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 1))) (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base|) (_ bv0 1)))) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32)))) is different from true [2022-12-14 04:57:14,440 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:57:14,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:57:15,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [14325356] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:57:15,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302752408] [2022-12-14 04:57:15,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 04:57:15,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:57:15,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:57:15,523 INFO L229 MonitoredProcess]: Starting monitored process 153 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:57:15,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e91655fa-d6e8-492e-8744-00f49c0a30eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-12-14 04:57:15,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 04:57:15,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:57:15,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-14 04:57:15,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:57:15,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 15 treesize of output 11 [2022-12-14 04:57:15,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 04:57:16,092 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-14 04:57:16,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 04:57:17,148 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 04:57:17,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2022-12-14 04:57:17,396 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 04:57:17,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:57:20,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2022-12-14 04:57:20,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 519 treesize of output 503