./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0134.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 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_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0134.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 554aa7448188134a862651a68c0992659f18748881f2b6912b6dbf17d440798c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 13:47:19,829 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 13:47:19,830 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 13:47:19,862 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 13:47:19,863 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 13:47:19,864 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 13:47:19,865 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 13:47:19,867 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 13:47:19,869 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 13:47:19,870 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 13:47:19,876 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 13:47:19,881 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 13:47:19,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 13:47:19,890 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 13:47:19,894 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 13:47:19,895 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 13:47:19,895 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 13:47:19,896 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 13:47:19,898 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 13:47:19,899 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 13:47:19,901 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 13:47:19,908 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 13:47:19,911 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 13:47:19,912 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 13:47:19,921 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 13:47:19,922 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 13:47:19,922 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 13:47:19,923 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 13:47:19,923 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 13:47:19,924 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 13:47:19,924 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 13:47:19,925 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 13:47:19,926 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 13:47:19,927 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 13:47:19,928 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 13:47:19,928 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 13:47:19,929 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 13:47:19,929 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 13:47:19,929 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 13:47:19,930 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 13:47:19,935 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 13:47:19,936 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-23 13:47:19,979 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 13:47:19,979 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 13:47:19,980 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 13:47:19,980 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 13:47:19,981 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 13:47:19,981 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 13:47:19,982 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 13:47:19,982 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 13:47:19,982 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 13:47:19,982 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 13:47:19,983 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 13:47:19,984 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 13:47:19,984 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 13:47:19,984 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 13:47:19,984 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 13:47:19,985 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 13:47:19,985 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 13:47:19,985 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 13:47:19,995 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 13:47:19,995 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 13:47:19,995 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 13:47:19,996 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 13:47:19,996 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 13:47:19,996 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 13:47:19,996 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 13:47:19,996 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 13:47:19,997 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 13:47:19,997 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 13:47:19,997 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 13:47:19,998 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 13:47:19,998 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 13:47:19,998 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 13:47:19,998 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 13:47:19,999 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 13:47:19,999 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 13:47:19,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:47:20,000 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 13:47:20,000 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 13:47:20,001 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 13:47:20,001 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 13:47:20,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 13:47:20,001 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 13:47:20,002 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_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 554aa7448188134a862651a68c0992659f18748881f2b6912b6dbf17d440798c [2022-11-23 13:47:20,303 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 13:47:20,337 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 13:47:20,340 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 13:47:20,341 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 13:47:20,342 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 13:47:20,343 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/memsafety/test-0134.i [2022-11-23 13:47:23,379 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 13:47:23,773 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 13:47:23,774 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/sv-benchmarks/c/memsafety/test-0134.i [2022-11-23 13:47:23,791 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/data/79511c6e9/bc56b13627964a68bb4a83a1d60e6786/FLAGecb010841 [2022-11-23 13:47:23,808 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/data/79511c6e9/bc56b13627964a68bb4a83a1d60e6786 [2022-11-23 13:47:23,811 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 13:47:23,813 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 13:47:23,815 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 13:47:23,815 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 13:47:23,819 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 13:47:23,820 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:47:23" (1/1) ... [2022-11-23 13:47:23,821 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25bac85d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:23, skipping insertion in model container [2022-11-23 13:47:23,821 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:47:23" (1/1) ... [2022-11-23 13:47:23,828 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 13:47:23,883 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 13:47:24,237 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:47:24,252 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-23 13:47:24,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@11ef5fd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:24, skipping insertion in model container [2022-11-23 13:47:24,253 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 13:47:24,253 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-23 13:47:24,255 INFO L158 Benchmark]: Toolchain (without parser) took 441.66ms. Allocated memory is still 132.1MB. Free memory was 103.1MB in the beginning and 90.7MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-23 13:47:24,256 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 109.1MB. Free memory is still 74.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 13:47:24,256 INFO L158 Benchmark]: CACSL2BoogieTranslator took 438.55ms. Allocated memory is still 132.1MB. Free memory was 102.9MB in the beginning and 90.7MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-23 13:47:24,258 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 109.1MB. Free memory is still 74.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 438.55ms. Allocated memory is still 132.1MB. Free memory was 102.9MB in the beginning and 90.7MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 585]: 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_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0134.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 554aa7448188134a862651a68c0992659f18748881f2b6912b6dbf17d440798c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 13:47:26,451 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 13:47:26,453 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 13:47:26,473 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 13:47:26,474 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 13:47:26,475 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 13:47:26,480 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 13:47:26,484 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 13:47:26,486 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 13:47:26,492 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 13:47:26,493 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 13:47:26,495 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 13:47:26,495 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 13:47:26,498 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 13:47:26,501 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 13:47:26,506 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 13:47:26,507 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 13:47:26,508 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 13:47:26,509 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 13:47:26,511 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 13:47:26,512 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 13:47:26,517 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 13:47:26,518 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 13:47:26,521 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 13:47:26,530 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 13:47:26,531 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 13:47:26,531 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 13:47:26,532 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 13:47:26,532 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 13:47:26,538 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 13:47:26,538 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 13:47:26,540 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 13:47:26,541 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 13:47:26,543 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 13:47:26,562 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 13:47:26,562 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 13:47:26,563 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 13:47:26,563 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 13:47:26,564 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 13:47:26,564 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 13:47:26,565 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 13:47:26,566 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-23 13:47:26,613 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 13:47:26,613 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 13:47:26,614 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 13:47:26,614 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 13:47:26,615 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 13:47:26,615 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 13:47:26,616 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 13:47:26,616 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 13:47:26,616 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 13:47:26,616 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 13:47:26,617 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 13:47:26,618 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 13:47:26,618 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 13:47:26,619 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 13:47:26,619 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 13:47:26,619 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 13:47:26,620 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 13:47:26,620 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 13:47:26,620 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 13:47:26,620 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 13:47:26,621 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 13:47:26,621 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 13:47:26,621 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 13:47:26,621 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 13:47:26,622 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 13:47:26,622 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-23 13:47:26,622 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-23 13:47:26,622 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 13:47:26,623 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 13:47:26,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 13:47:26,623 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 13:47:26,624 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 13:47:26,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:47:26,624 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 13:47:26,625 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 13:47:26,625 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-23 13:47:26,625 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-23 13:47:26,625 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 13:47:26,626 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 13:47:26,626 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_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 554aa7448188134a862651a68c0992659f18748881f2b6912b6dbf17d440798c [2022-11-23 13:47:27,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 13:47:27,088 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 13:47:27,090 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 13:47:27,092 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 13:47:27,092 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 13:47:27,094 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/memsafety/test-0134.i [2022-11-23 13:47:30,233 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 13:47:30,526 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 13:47:30,527 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/sv-benchmarks/c/memsafety/test-0134.i [2022-11-23 13:47:30,539 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/data/980a40522/e19e537fe16b4266acf4763386f744a4/FLAG0073d3bac [2022-11-23 13:47:30,573 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/data/980a40522/e19e537fe16b4266acf4763386f744a4 [2022-11-23 13:47:30,576 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 13:47:30,577 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 13:47:30,578 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 13:47:30,582 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 13:47:30,585 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 13:47:30,587 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:47:30" (1/1) ... [2022-11-23 13:47:30,588 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b337367 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:30, skipping insertion in model container [2022-11-23 13:47:30,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:47:30" (1/1) ... [2022-11-23 13:47:30,597 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 13:47:30,663 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 13:47:31,090 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:47:31,110 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-23 13:47:31,121 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 13:47:31,176 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:47:31,211 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 13:47:31,263 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:47:31,307 INFO L208 MainTranslator]: Completed translation [2022-11-23 13:47:31,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:31 WrapperNode [2022-11-23 13:47:31,308 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 13:47:31,310 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 13:47:31,310 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 13:47:31,310 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 13:47:31,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:31" (1/1) ... [2022-11-23 13:47:31,335 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:31" (1/1) ... [2022-11-23 13:47:31,364 INFO L138 Inliner]: procedures = 140, calls = 54, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 133 [2022-11-23 13:47:31,365 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 13:47:31,366 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 13:47:31,366 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 13:47:31,366 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 13:47:31,373 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:31" (1/1) ... [2022-11-23 13:47:31,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:31" (1/1) ... [2022-11-23 13:47:31,378 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:31" (1/1) ... [2022-11-23 13:47:31,382 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:31" (1/1) ... [2022-11-23 13:47:31,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:31" (1/1) ... [2022-11-23 13:47:31,397 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:31" (1/1) ... [2022-11-23 13:47:31,399 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:31" (1/1) ... [2022-11-23 13:47:31,401 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:31" (1/1) ... [2022-11-23 13:47:31,404 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 13:47:31,405 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 13:47:31,405 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 13:47:31,405 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 13:47:31,406 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:31" (1/1) ... [2022-11-23 13:47:31,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:47:31,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:47:31,439 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 13:47:31,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 13:47:31,471 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2022-11-23 13:47:31,471 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2022-11-23 13:47:31,471 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-23 13:47:31,472 INFO L130 BoogieDeclarations]: Found specification of procedure __list_del [2022-11-23 13:47:31,472 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_del [2022-11-23 13:47:31,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 13:47:31,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 13:47:31,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 13:47:31,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 13:47:31,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 13:47:31,473 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2022-11-23 13:47:31,473 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2022-11-23 13:47:31,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 13:47:31,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-23 13:47:31,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 13:47:31,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-23 13:47:31,474 INFO L130 BoogieDeclarations]: Found specification of procedure val_from_node [2022-11-23 13:47:31,474 INFO L138 BoogieDeclarations]: Found implementation of procedure val_from_node [2022-11-23 13:47:31,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 13:47:31,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 13:47:31,611 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 13:47:31,614 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 13:47:32,285 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 13:47:32,298 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 13:47:32,301 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-23 13:47:32,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:47:32 BoogieIcfgContainer [2022-11-23 13:47:32,305 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 13:47:32,308 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 13:47:32,308 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 13:47:32,311 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 13:47:32,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:47:30" (1/3) ... [2022-11-23 13:47:32,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ed6eb37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:47:32, skipping insertion in model container [2022-11-23 13:47:32,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:47:31" (2/3) ... [2022-11-23 13:47:32,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ed6eb37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:47:32, skipping insertion in model container [2022-11-23 13:47:32,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:47:32" (3/3) ... [2022-11-23 13:47:32,317 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0134.i [2022-11-23 13:47:32,337 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 13:47:32,337 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 48 error locations. [2022-11-23 13:47:32,401 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 13:47:32,408 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;@67be3c96, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 13:47:32,408 INFO L358 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2022-11-23 13:47:32,413 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 69 states have (on average 1.8695652173913044) internal successors, (129), 117 states have internal predecessors, (129), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-23 13:47:32,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 13:47:32,420 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:47:32,421 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 13:47:32,421 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:47:32,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:47:32,430 INFO L85 PathProgramCache]: Analyzing trace with hash 66866992, now seen corresponding path program 1 times [2022-11-23 13:47:32,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:47:32,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1404528721] [2022-11-23 13:47:32,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:47:32,447 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:47:32,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:47:32,455 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:47:32,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-23 13:47:32,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:47:32,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-23 13:47:32,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:47:32,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:47:32,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:47:32,598 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:47:32,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1404528721] [2022-11-23 13:47:32,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1404528721] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:47:32,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:47:32,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 13:47:32,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162863570] [2022-11-23 13:47:32,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:47:32,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 13:47:32,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:47:32,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 13:47:32,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 13:47:32,666 INFO L87 Difference]: Start difference. First operand has 131 states, 69 states have (on average 1.8695652173913044) internal successors, (129), 117 states have internal predecessors, (129), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:32,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:47:32,712 INFO L93 Difference]: Finished difference Result 131 states and 142 transitions. [2022-11-23 13:47:32,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 13:47:32,714 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-23 13:47:32,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:47:32,725 INFO L225 Difference]: With dead ends: 131 [2022-11-23 13:47:32,725 INFO L226 Difference]: Without dead ends: 129 [2022-11-23 13:47:32,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 13:47:32,731 INFO L413 NwaCegarLoop]: 142 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, 142 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 [2022-11-23 13:47:32,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 13:47:32,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-23 13:47:32,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-11-23 13:47:32,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 68 states have (on average 1.7941176470588236) internal successors, (122), 115 states have internal predecessors, (122), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-23 13:47:32,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 140 transitions. [2022-11-23 13:47:32,806 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 140 transitions. Word has length 5 [2022-11-23 13:47:32,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:47:32,807 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 140 transitions. [2022-11-23 13:47:32,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:32,808 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 140 transitions. [2022-11-23 13:47:32,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 13:47:32,808 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:47:32,809 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 13:47:32,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-23 13:47:33,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:47:33,032 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:47:33,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:47:33,032 INFO L85 PathProgramCache]: Analyzing trace with hash 66867054, now seen corresponding path program 1 times [2022-11-23 13:47:33,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:47:33,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1669599997] [2022-11-23 13:47:33,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:47:33,033 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:47:33,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:47:33,066 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:47:33,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-23 13:47:33,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:47:33,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 13:47:33,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:47:33,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 13:47:33,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:47:33,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:47:33,223 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:47:33,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1669599997] [2022-11-23 13:47:33,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1669599997] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:47:33,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:47:33,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 13:47:33,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297102356] [2022-11-23 13:47:33,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:47:33,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:47:33,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:47:33,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:47:33,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:47:33,226 INFO L87 Difference]: Start difference. First operand 129 states and 140 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:33,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:47:33,495 INFO L93 Difference]: Finished difference Result 151 states and 162 transitions. [2022-11-23 13:47:33,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:47:33,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-23 13:47:33,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:47:33,496 INFO L225 Difference]: With dead ends: 151 [2022-11-23 13:47:33,497 INFO L226 Difference]: Without dead ends: 151 [2022-11-23 13:47:33,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:47:33,498 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 75 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:47:33,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 141 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 13:47:33,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-23 13:47:33,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 128. [2022-11-23 13:47:33,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 68 states have (on average 1.7794117647058822) internal successors, (121), 114 states have internal predecessors, (121), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-23 13:47:33,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 139 transitions. [2022-11-23 13:47:33,510 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 139 transitions. Word has length 5 [2022-11-23 13:47:33,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:47:33,511 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 139 transitions. [2022-11-23 13:47:33,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:33,511 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 139 transitions. [2022-11-23 13:47:33,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 13:47:33,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:47:33,512 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 13:47:33,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-23 13:47:33,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:47:33,723 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:47:33,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:47:33,724 INFO L85 PathProgramCache]: Analyzing trace with hash 66867055, now seen corresponding path program 1 times [2022-11-23 13:47:33,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:47:33,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [66952101] [2022-11-23 13:47:33,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:47:33,725 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:47:33,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:47:33,726 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:47:33,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-23 13:47:33,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:47:33,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 13:47:33,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:47:33,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 13:47:33,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:47:33,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:47:33,876 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:47:33,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [66952101] [2022-11-23 13:47:33,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [66952101] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:47:33,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:47:33,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 13:47:33,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303790415] [2022-11-23 13:47:33,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:47:33,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:47:33,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:47:33,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:47:33,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:47:33,882 INFO L87 Difference]: Start difference. First operand 128 states and 139 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:34,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:47:34,202 INFO L93 Difference]: Finished difference Result 150 states and 161 transitions. [2022-11-23 13:47:34,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:47:34,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-23 13:47:34,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:47:34,206 INFO L225 Difference]: With dead ends: 150 [2022-11-23 13:47:34,206 INFO L226 Difference]: Without dead ends: 150 [2022-11-23 13:47:34,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:47:34,207 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 28 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 13:47:34,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 211 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 13:47:34,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-23 13:47:34,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 127. [2022-11-23 13:47:34,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 68 states have (on average 1.7647058823529411) internal successors, (120), 113 states have internal predecessors, (120), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-23 13:47:34,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 138 transitions. [2022-11-23 13:47:34,228 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 138 transitions. Word has length 5 [2022-11-23 13:47:34,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:47:34,229 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 138 transitions. [2022-11-23 13:47:34,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:34,229 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 138 transitions. [2022-11-23 13:47:34,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 13:47:34,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:47:34,230 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:47:34,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-23 13:47:34,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:47:34,442 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting list_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:47:34,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:47:34,443 INFO L85 PathProgramCache]: Analyzing trace with hash -828261384, now seen corresponding path program 1 times [2022-11-23 13:47:34,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:47:34,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1687886848] [2022-11-23 13:47:34,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:47:34,444 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:47:34,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:47:34,446 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:47:34,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-23 13:47:34,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:47:34,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 13:47:34,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:47:34,632 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 13:47:34,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 13:47:34,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:47:34,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:47:34,741 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:47:34,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1687886848] [2022-11-23 13:47:34,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1687886848] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:47:34,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:47:34,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:47:34,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461801255] [2022-11-23 13:47:34,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:47:34,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 13:47:34,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:47:34,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 13:47:34,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:47:34,748 INFO L87 Difference]: Start difference. First operand 127 states and 138 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:35,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:47:35,269 INFO L93 Difference]: Finished difference Result 165 states and 175 transitions. [2022-11-23 13:47:35,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 13:47:35,270 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-23 13:47:35,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:47:35,271 INFO L225 Difference]: With dead ends: 165 [2022-11-23 13:47:35,272 INFO L226 Difference]: Without dead ends: 165 [2022-11-23 13:47:35,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 13:47:35,273 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 179 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 13:47:35,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 208 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 13:47:35,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-23 13:47:35,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 142. [2022-11-23 13:47:35,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 83 states have (on average 1.783132530120482) internal successors, (148), 127 states have internal predecessors, (148), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-23 13:47:35,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 166 transitions. [2022-11-23 13:47:35,285 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 166 transitions. Word has length 8 [2022-11-23 13:47:35,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:47:35,285 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 166 transitions. [2022-11-23 13:47:35,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:35,286 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 166 transitions. [2022-11-23 13:47:35,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 13:47:35,286 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:47:35,286 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:47:35,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-11-23 13:47:35,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:47:35,499 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting list_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:47:35,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:47:35,500 INFO L85 PathProgramCache]: Analyzing trace with hash -828261383, now seen corresponding path program 1 times [2022-11-23 13:47:35,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:47:35,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1877855917] [2022-11-23 13:47:35,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:47:35,500 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:47:35,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:47:35,501 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:47:35,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-23 13:47:35,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:47:35,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 13:47:35,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:47:35,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:47:35,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 13:47:35,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:47:35,772 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:47:35,772 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:47:35,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1877855917] [2022-11-23 13:47:35,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1877855917] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:47:35,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:47:35,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 13:47:35,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528923479] [2022-11-23 13:47:35,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:47:35,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 13:47:35,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:47:35,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 13:47:35,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:47:35,788 INFO L87 Difference]: Start difference. First operand 142 states and 166 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:36,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:47:36,397 INFO L93 Difference]: Finished difference Result 146 states and 159 transitions. [2022-11-23 13:47:36,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 13:47:36,398 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-23 13:47:36,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:47:36,399 INFO L225 Difference]: With dead ends: 146 [2022-11-23 13:47:36,399 INFO L226 Difference]: Without dead ends: 146 [2022-11-23 13:47:36,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 13:47:36,400 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 304 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 13:47:36,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 146 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 13:47:36,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-23 13:47:36,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 134. [2022-11-23 13:47:36,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 79 states have (on average 1.6962025316455696) internal successors, (134), 119 states have internal predecessors, (134), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-23 13:47:36,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 152 transitions. [2022-11-23 13:47:36,412 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 152 transitions. Word has length 8 [2022-11-23 13:47:36,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:47:36,413 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 152 transitions. [2022-11-23 13:47:36,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:36,413 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 152 transitions. [2022-11-23 13:47:36,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-23 13:47:36,414 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:47:36,414 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:47:36,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-23 13:47:36,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:47:36,614 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting list_addErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:47:36,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:47:36,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1390240455, now seen corresponding path program 1 times [2022-11-23 13:47:36,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:47:36,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [536424458] [2022-11-23 13:47:36,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:47:36,616 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:47:36,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:47:36,617 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:47:36,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-23 13:47:36,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:47:36,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 13:47:36,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:47:36,817 INFO L321 Elim1Store]: treesize reduction 17, result has 19.0 percent of original size [2022-11-23 13:47:36,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 16 [2022-11-23 13:47:36,867 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 14 treesize of output 16 [2022-11-23 13:47:36,947 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 [2022-11-23 13:47:36,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:47:36,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:47:36,990 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:47:36,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [536424458] [2022-11-23 13:47:36,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [536424458] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:47:36,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:47:36,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 13:47:36,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480247916] [2022-11-23 13:47:36,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:47:36,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 13:47:36,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:47:36,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 13:47:36,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-23 13:47:36,993 INFO L87 Difference]: Start difference. First operand 134 states and 152 transitions. Second operand has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:37,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:47:37,712 INFO L93 Difference]: Finished difference Result 155 states and 173 transitions. [2022-11-23 13:47:37,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 13:47:37,712 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-23 13:47:37,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:47:37,714 INFO L225 Difference]: With dead ends: 155 [2022-11-23 13:47:37,715 INFO L226 Difference]: Without dead ends: 155 [2022-11-23 13:47:37,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-11-23 13:47:37,716 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 38 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 13:47:37,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 656 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 13:47:37,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-23 13:47:37,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 148. [2022-11-23 13:47:37,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 91 states have (on average 1.6813186813186813) internal successors, (153), 132 states have internal predecessors, (153), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-23 13:47:37,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 173 transitions. [2022-11-23 13:47:37,724 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 173 transitions. Word has length 10 [2022-11-23 13:47:37,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:47:37,724 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 173 transitions. [2022-11-23 13:47:37,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:37,725 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 173 transitions. [2022-11-23 13:47:37,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-23 13:47:37,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:47:37,725 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:47:37,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-23 13:47:37,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:47:37,938 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting list_addErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:47:37,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:47:37,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1390240454, now seen corresponding path program 1 times [2022-11-23 13:47:37,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:47:37,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277175578] [2022-11-23 13:47:37,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:47:37,939 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:47:37,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:47:37,940 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:47:37,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-23 13:47:38,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:47:38,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 13:47:38,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:47:38,198 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 13:47:38,199 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 12 treesize of output 18 [2022-11-23 13:47:38,235 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 13:47:38,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 13:47:38,311 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 14 treesize of output 16 [2022-11-23 13:47:38,326 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 14 treesize of output 16 [2022-11-23 13:47:38,450 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 [2022-11-23 13:47:38,455 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 [2022-11-23 13:47:38,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:47:38,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:47:38,509 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:47:38,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277175578] [2022-11-23 13:47:38,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277175578] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:47:38,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:47:38,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 13:47:38,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850088823] [2022-11-23 13:47:38,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:47:38,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 13:47:38,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:47:38,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 13:47:38,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-23 13:47:38,511 INFO L87 Difference]: Start difference. First operand 148 states and 173 transitions. Second operand has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:39,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:47:39,688 INFO L93 Difference]: Finished difference Result 154 states and 172 transitions. [2022-11-23 13:47:39,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 13:47:39,689 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-23 13:47:39,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:47:39,690 INFO L225 Difference]: With dead ends: 154 [2022-11-23 13:47:39,690 INFO L226 Difference]: Without dead ends: 154 [2022-11-23 13:47:39,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-11-23 13:47:39,691 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 45 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 13:47:39,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 599 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 13:47:39,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-23 13:47:39,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 148. [2022-11-23 13:47:39,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 91 states have (on average 1.6703296703296704) internal successors, (152), 132 states have internal predecessors, (152), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-23 13:47:39,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 172 transitions. [2022-11-23 13:47:39,698 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 172 transitions. Word has length 10 [2022-11-23 13:47:39,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:47:39,699 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 172 transitions. [2022-11-23 13:47:39,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:39,699 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 172 transitions. [2022-11-23 13:47:39,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 13:47:39,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:47:39,700 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:47:39,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-23 13:47:39,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:47:39,911 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting list_addErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:47:39,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:47:39,912 INFO L85 PathProgramCache]: Analyzing trace with hash -147781147, now seen corresponding path program 1 times [2022-11-23 13:47:39,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:47:39,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1807213973] [2022-11-23 13:47:39,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:47:39,912 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:47:39,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:47:39,914 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:47:39,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-23 13:47:40,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:47:40,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 13:47:40,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:47:40,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 13:47:40,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:47:40,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:47:40,067 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:47:40,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1807213973] [2022-11-23 13:47:40,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1807213973] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:47:40,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:47:40,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 13:47:40,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530185190] [2022-11-23 13:47:40,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:47:40,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 13:47:40,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:47:40,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 13:47:40,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:47:40,069 INFO L87 Difference]: Start difference. First operand 148 states and 172 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:40,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:47:40,670 INFO L93 Difference]: Finished difference Result 169 states and 183 transitions. [2022-11-23 13:47:40,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 13:47:40,673 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-23 13:47:40,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:47:40,674 INFO L225 Difference]: With dead ends: 169 [2022-11-23 13:47:40,674 INFO L226 Difference]: Without dead ends: 169 [2022-11-23 13:47:40,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-23 13:47:40,675 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 113 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 13:47:40,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 301 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 13:47:40,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-23 13:47:40,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 147. [2022-11-23 13:47:40,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 91 states have (on average 1.6153846153846154) internal successors, (147), 131 states have internal predecessors, (147), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-23 13:47:40,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 167 transitions. [2022-11-23 13:47:40,681 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 167 transitions. Word has length 11 [2022-11-23 13:47:40,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:47:40,681 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 167 transitions. [2022-11-23 13:47:40,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:40,681 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 167 transitions. [2022-11-23 13:47:40,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 13:47:40,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:47:40,682 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:47:40,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-23 13:47:40,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:47:40,896 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting list_addErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:47:40,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:47:40,897 INFO L85 PathProgramCache]: Analyzing trace with hash -147781146, now seen corresponding path program 1 times [2022-11-23 13:47:40,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:47:40,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [26817734] [2022-11-23 13:47:40,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:47:40,897 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:47:40,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:47:40,899 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:47:40,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-23 13:47:41,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:47:41,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 13:47:41,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:47:41,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 13:47:41,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:47:41,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:47:41,103 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:47:41,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [26817734] [2022-11-23 13:47:41,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [26817734] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:47:41,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:47:41,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 13:47:41,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97422239] [2022-11-23 13:47:41,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:47:41,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 13:47:41,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:47:41,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 13:47:41,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:47:41,105 INFO L87 Difference]: Start difference. First operand 147 states and 167 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:41,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:47:41,668 INFO L93 Difference]: Finished difference Result 169 states and 181 transitions. [2022-11-23 13:47:41,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 13:47:41,672 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-23 13:47:41,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:47:41,673 INFO L225 Difference]: With dead ends: 169 [2022-11-23 13:47:41,673 INFO L226 Difference]: Without dead ends: 169 [2022-11-23 13:47:41,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-23 13:47:41,674 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 57 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 13:47:41,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 436 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 13:47:41,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-23 13:47:41,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 147. [2022-11-23 13:47:41,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 91 states have (on average 1.5714285714285714) internal successors, (143), 131 states have internal predecessors, (143), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-23 13:47:41,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 163 transitions. [2022-11-23 13:47:41,680 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 163 transitions. Word has length 11 [2022-11-23 13:47:41,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:47:41,680 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 163 transitions. [2022-11-23 13:47:41,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:41,681 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 163 transitions. [2022-11-23 13:47:41,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 13:47:41,681 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:47:41,681 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:47:41,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-23 13:47:41,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:47:41,882 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting list_addErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:47:41,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:47:41,882 INFO L85 PathProgramCache]: Analyzing trace with hash -283761464, now seen corresponding path program 1 times [2022-11-23 13:47:41,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:47:41,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [649765853] [2022-11-23 13:47:41,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:47:41,883 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:47:41,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:47:41,884 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:47:41,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-23 13:47:41,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:47:41,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 13:47:41,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:47:42,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:47:42,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:47:42,022 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:47:42,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [649765853] [2022-11-23 13:47:42,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [649765853] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:47:42,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:47:42,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:47:42,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896757779] [2022-11-23 13:47:42,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:47:42,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 13:47:42,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:47:42,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 13:47:42,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:47:42,024 INFO L87 Difference]: Start difference. First operand 147 states and 163 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), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:42,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:47:42,266 INFO L93 Difference]: Finished difference Result 146 states and 160 transitions. [2022-11-23 13:47:42,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 13:47:42,267 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), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-23 13:47:42,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:47:42,268 INFO L225 Difference]: With dead ends: 146 [2022-11-23 13:47:42,269 INFO L226 Difference]: Without dead ends: 146 [2022-11-23 13:47:42,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:47:42,269 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 22 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:47:42,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 269 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 13:47:42,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-23 13:47:42,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-11-23 13:47:42,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 91 states have (on average 1.5384615384615385) internal successors, (140), 130 states have internal predecessors, (140), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-23 13:47:42,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 160 transitions. [2022-11-23 13:47:42,276 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 160 transitions. Word has length 13 [2022-11-23 13:47:42,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:47:42,276 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 160 transitions. [2022-11-23 13:47:42,276 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), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:42,276 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 160 transitions. [2022-11-23 13:47:42,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 13:47:42,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:47:42,277 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:47:42,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-23 13:47:42,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:47:42,488 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting list_addErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:47:42,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:47:42,489 INFO L85 PathProgramCache]: Analyzing trace with hash -283761463, now seen corresponding path program 1 times [2022-11-23 13:47:42,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:47:42,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693996923] [2022-11-23 13:47:42,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:47:42,489 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:47:42,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:47:42,490 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:47:42,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-23 13:47:42,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:47:42,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 13:47:42,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:47:42,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:47:42,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:47:42,693 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:47:42,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693996923] [2022-11-23 13:47:42,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [693996923] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:47:42,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:47:42,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 13:47:42,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65195957] [2022-11-23 13:47:42,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:47:42,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 13:47:42,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:47:42,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 13:47:42,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 13:47:42,695 INFO L87 Difference]: Start difference. First operand 146 states and 160 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:43,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:47:43,205 INFO L93 Difference]: Finished difference Result 148 states and 158 transitions. [2022-11-23 13:47:43,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 13:47:43,205 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-23 13:47:43,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:47:43,207 INFO L225 Difference]: With dead ends: 148 [2022-11-23 13:47:43,207 INFO L226 Difference]: Without dead ends: 148 [2022-11-23 13:47:43,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-23 13:47:43,208 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 162 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 13:47:43,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 514 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 13:47:43,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-23 13:47:43,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2022-11-23 13:47:43,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 91 states have (on average 1.5164835164835164) internal successors, (138), 130 states have internal predecessors, (138), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-23 13:47:43,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 158 transitions. [2022-11-23 13:47:43,213 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 158 transitions. Word has length 13 [2022-11-23 13:47:43,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:47:43,214 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 158 transitions. [2022-11-23 13:47:43,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:47:43,214 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 158 transitions. [2022-11-23 13:47:43,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-23 13:47:43,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:47:43,215 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] [2022-11-23 13:47:43,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-23 13:47:43,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:47:43,426 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:47:43,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:47:43,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1628861501, now seen corresponding path program 1 times [2022-11-23 13:47:43,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:47:43,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [685936635] [2022-11-23 13:47:43,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:47:43,427 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:47:43,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:47:43,428 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:47:43,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-23 13:47:43,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:47:43,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 13:47:43,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:47:43,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:47:43,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:47:43,638 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:47:43,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [685936635] [2022-11-23 13:47:43,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [685936635] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:47:43,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:47:43,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 13:47:43,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921815728] [2022-11-23 13:47:43,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:47:43,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 13:47:43,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:47:43,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 13:47:43,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 13:47:43,641 INFO L87 Difference]: Start difference. First operand 146 states and 158 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 13:47:44,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:47:44,215 INFO L93 Difference]: Finished difference Result 145 states and 157 transitions. [2022-11-23 13:47:44,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 13:47:44,215 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-11-23 13:47:44,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:47:44,216 INFO L225 Difference]: With dead ends: 145 [2022-11-23 13:47:44,217 INFO L226 Difference]: Without dead ends: 145 [2022-11-23 13:47:44,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-23 13:47:44,217 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 151 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 13:47:44,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 294 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 13:47:44,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-11-23 13:47:44,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-11-23 13:47:44,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 91 states have (on average 1.5054945054945055) internal successors, (137), 129 states have internal predecessors, (137), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-23 13:47:44,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 157 transitions. [2022-11-23 13:47:44,223 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 157 transitions. Word has length 22 [2022-11-23 13:47:44,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:47:44,224 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 157 transitions. [2022-11-23 13:47:44,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 13:47:44,224 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 157 transitions. [2022-11-23 13:47:44,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-23 13:47:44,224 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:47:44,225 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] [2022-11-23 13:47:44,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-11-23 13:47:44,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:47:44,437 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting list_emptyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:47:44,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:47:44,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1628861500, now seen corresponding path program 1 times [2022-11-23 13:47:44,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:47:44,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [178636782] [2022-11-23 13:47:44,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:47:44,438 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 [2022-11-23 13:47:44,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:47:44,439 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:47:44,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-23 13:47:44,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:47:44,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 13:47:44,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:47:44,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:47:44,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:47:44,787 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:47:44,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [178636782] [2022-11-23 13:47:44,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [178636782] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:47:44,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:47:44,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 13:47:44,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301934295] [2022-11-23 13:47:44,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:47:44,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 13:47:44,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:47:44,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 13:47:44,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-23 13:47:44,788 INFO L87 Difference]: Start difference. First operand 145 states and 157 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 13:47:45,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:47:45,623 INFO L93 Difference]: Finished difference Result 144 states and 156 transitions. [2022-11-23 13:47:45,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 13:47:45,624 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-11-23 13:47:45,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:47:45,625 INFO L225 Difference]: With dead ends: 144 [2022-11-23 13:47:45,625 INFO L226 Difference]: Without dead ends: 144 [2022-11-23 13:47:45,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-23 13:47:45,626 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 154 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 13:47:45,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 299 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 13:47:45,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-23 13:47:45,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-11-23 13:47:45,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 91 states have (on average 1.4945054945054945) internal successors, (136), 128 states have internal predecessors, (136), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-23 13:47:45,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 156 transitions. [2022-11-23 13:47:45,632 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 156 transitions. Word has length 22 [2022-11-23 13:47:45,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:47:45,632 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 156 transitions. [2022-11-23 13:47:45,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 13:47:45,633 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 156 transitions. [2022-11-23 13:47:45,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-23 13:47:45,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:47:45,634 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:47:45,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-23 13:47:45,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:47:45,843 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting list_addErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:47:45,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:47:45,843 INFO L85 PathProgramCache]: Analyzing trace with hash 508658616, now seen corresponding path program 1 times [2022-11-23 13:47:45,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:47:45,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [44158387] [2022-11-23 13:47:45,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:47:45,844 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:47:45,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:47:45,845 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:47:45,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-23 13:47:46,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:47:46,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-23 13:47:46,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:47:46,138 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-23 13:47:46,138 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 12 treesize of output 22 [2022-11-23 13:47:46,391 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 [2022-11-23 13:47:46,600 INFO L321 Elim1Store]: treesize reduction 116, result has 26.6 percent of original size [2022-11-23 13:47:46,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 43 treesize of output 73 [2022-11-23 13:47:46,759 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 42 treesize of output 40 [2022-11-23 13:47:47,272 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 92 treesize of output 68 [2022-11-23 13:47:47,541 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:47:47,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:47:47,779 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_345 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_gl_insert_~node~0#1.base| v_ArrVal_345) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|)) (_ bv1 1)) (_ bv0 1))) is different from false [2022-11-23 13:47:50,260 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:47:50,261 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2022-11-23 13:47:50,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:47:50,269 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 23 treesize of output 15 [2022-11-23 13:47:50,329 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:47:50,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [44158387] [2022-11-23 13:47:50,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [44158387] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:47:50,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [52182446] [2022-11-23 13:47:50,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:47:50,329 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:47:50,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:47:50,335 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:47:50,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-23 13:47:50,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:47:50,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-23 13:47:50,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:47:50,976 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 13:47:50,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 13:47:51,567 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 [2022-11-23 13:47:51,884 INFO L321 Elim1Store]: treesize reduction 106, result has 28.4 percent of original size [2022-11-23 13:47:51,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 37 treesize of output 67 [2022-11-23 13:47:52,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 26 [2022-11-23 13:47:52,260 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 19 treesize of output 11 [2022-11-23 13:47:52,407 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:47:52,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:47:52,450 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_410 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_gl_insert_~node~0#1.base| v_ArrVal_410) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|)) (_ bv1 1)))) is different from false [2022-11-23 13:47:52,869 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:47:52,870 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2022-11-23 13:47:52,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:47:52,875 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 23 treesize of output 15 [2022-11-23 13:47:54,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [52182446] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:47:54,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670577848] [2022-11-23 13:47:54,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:47:54,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:47:54,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:47:54,953 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:47:54,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-23 13:47:55,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:47:55,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-23 13:47:55,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:47:55,299 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 11 treesize of output 7 [2022-11-23 13:47:55,459 INFO L321 Elim1Store]: treesize reduction 70, result has 30.7 percent of original size [2022-11-23 13:47:55,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 51 [2022-11-23 13:47:55,610 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 26 treesize of output 26 [2022-11-23 13:47:55,794 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 [2022-11-23 13:47:55,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:47:55,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:47:55,884 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_474 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_gl_insert_~node~0#1.base| v_ArrVal_474) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|)) (_ bv1 1)) (_ bv0 1))) is different from false [2022-11-23 13:47:55,905 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_474 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_473 (_ BitVec 1)) (|v_ULTIMATE.start_gl_insert_~node~0#1.base_16| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_gl_insert_~node~0#1.base_16|))) (= (_ bv0 1) (bvadd (select (store |c_#valid| |v_ULTIMATE.start_gl_insert_~node~0#1.base_16| v_ArrVal_473) (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_gl_insert_~node~0#1.base_16| v_ArrVal_474) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|)) (_ bv1 1))))) is different from false [2022-11-23 13:47:56,164 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:47:56,164 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2022-11-23 13:47:56,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:47:56,170 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 23 treesize of output 15 [2022-11-23 13:47:58,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670577848] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:47:58,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:47:58,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 13] total 34 [2022-11-23 13:47:58,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600892684] [2022-11-23 13:47:58,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:47:58,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-23 13:47:58,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:47:58,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-23 13:47:58,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1585, Unknown=32, NotChecked=340, Total=2162 [2022-11-23 13:47:58,269 INFO L87 Difference]: Start difference. First operand 144 states and 156 transitions. Second operand has 35 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 6 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 13:48:03,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:03,785 INFO L93 Difference]: Finished difference Result 225 states and 241 transitions. [2022-11-23 13:48:03,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-23 13:48:03,786 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 6 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2022-11-23 13:48:03,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:03,789 INFO L225 Difference]: With dead ends: 225 [2022-11-23 13:48:03,790 INFO L226 Difference]: Without dead ends: 225 [2022-11-23 13:48:03,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=660, Invalid=3484, Unknown=32, NotChecked=516, Total=4692 [2022-11-23 13:48:03,791 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 938 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 938 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 1371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:03,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [938 Valid, 853 Invalid, 1371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1241 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-23 13:48:03,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-11-23 13:48:03,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 183. [2022-11-23 13:48:03,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 123 states have (on average 1.5040650406504066) internal successors, (185), 161 states have internal predecessors, (185), 14 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-23 13:48:03,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 213 transitions. [2022-11-23 13:48:03,798 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 213 transitions. Word has length 26 [2022-11-23 13:48:03,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:03,798 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 213 transitions. [2022-11-23 13:48:03,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 6 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 13:48:03,798 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 213 transitions. [2022-11-23 13:48:03,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-23 13:48:03,806 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:03,807 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:48:03,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-11-23 13:48:04,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-23 13:48:04,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-23 13:48:04,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:48:04,411 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting list_addErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:48:04,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:04,412 INFO L85 PathProgramCache]: Analyzing trace with hash 508658617, now seen corresponding path program 1 times [2022-11-23 13:48:04,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:48:04,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [809183769] [2022-11-23 13:48:04,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:04,412 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:48:04,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:48:04,413 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:48:04,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-23 13:48:04,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:04,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-23 13:48:04,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:48:04,673 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 5 [2022-11-23 13:48:04,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 13:48:05,014 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 [2022-11-23 13:48:05,022 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 [2022-11-23 13:48:05,250 INFO L321 Elim1Store]: treesize reduction 26, result has 33.3 percent of original size [2022-11-23 13:48:05,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 26 [2022-11-23 13:48:05,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-23 13:48:05,326 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 24 treesize of output 24 [2022-11-23 13:48:05,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 13:48:05,469 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 [2022-11-23 13:48:05,473 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 9 [2022-11-23 13:48:05,549 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:48:05,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:48:06,062 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_542 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_gl_insert_~node~0#1.base| v_ArrVal_542) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_542 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_543 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_gl_insert_~node~0#1.base| v_ArrVal_542) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_gl_insert_~node~0#1.base| v_ArrVal_543) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|))))) is different from false [2022-11-23 13:48:06,148 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_gl_insert_~node~0#1.base_19| (_ BitVec 32))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_gl_insert_~node~0#1.base_19|) (_ bv0 1))) (forall ((v_ArrVal_542 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_gl_insert_~node~0#1.base_19| v_ArrVal_542) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))))) (forall ((|v_ULTIMATE.start_gl_insert_~node~0#1.base_19| (_ BitVec 32))) (or (forall ((v_ArrVal_542 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_543 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_541 (_ BitVec 32))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_gl_insert_~node~0#1.base_19| v_ArrVal_542) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|)) (select (store |c_#length| |v_ULTIMATE.start_gl_insert_~node~0#1.base_19| v_ArrVal_541) (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_gl_insert_~node~0#1.base_19| v_ArrVal_543) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|)))) (not (= (select |c_#valid| |v_ULTIMATE.start_gl_insert_~node~0#1.base_19|) (_ bv0 1)))))) is different from false [2022-11-23 13:48:06,783 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:48:06,784 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 32 [2022-11-23 13:48:06,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:48:06,790 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 14 [2022-11-23 13:48:06,817 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:48:06,818 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 43 [2022-11-23 13:48:06,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:48:06,823 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 40 treesize of output 32 [2022-11-23 13:48:06,836 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:48:06,837 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2022-11-23 13:48:06,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:48:06,843 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 25 treesize of output 17 [2022-11-23 13:48:07,135 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:48:07,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [809183769] [2022-11-23 13:48:07,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [809183769] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:48:07,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1331085371] [2022-11-23 13:48:07,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:07,135 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:48:07,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:48:07,137 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:48:07,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-23 13:48:07,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:07,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-23 13:48:07,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:48:07,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 13:48:07,715 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 [2022-11-23 13:48:08,508 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 [2022-11-23 13:48:08,532 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 [2022-11-23 13:48:08,939 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-23 13:48:08,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2022-11-23 13:48:08,973 INFO L321 Elim1Store]: treesize reduction 26, result has 33.3 percent of original size [2022-11-23 13:48:08,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 26 [2022-11-23 13:48:09,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 13:48:09,119 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 24 treesize of output 24 [2022-11-23 13:48:09,375 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 [2022-11-23 13:48:09,380 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 9 [2022-11-23 13:48:09,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:48:09,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:48:09,473 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_615 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_616 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_gl_insert_~node~0#1.base| v_ArrVal_616) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_gl_insert_~node~0#1.base| v_ArrVal_615) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|)))) (forall ((v_ArrVal_616 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_gl_insert_~node~0#1.base| v_ArrVal_616) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0))))) is different from false [2022-11-23 13:48:10,710 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:48:10,710 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 43 [2022-11-23 13:48:10,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:48:10,718 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 40 treesize of output 32 [2022-11-23 13:48:10,730 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:48:10,730 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2022-11-23 13:48:10,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:48:10,735 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 25 treesize of output 17 [2022-11-23 13:48:10,756 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:48:10,756 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 32 [2022-11-23 13:48:10,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:48:10,761 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 14 [2022-11-23 13:48:10,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1331085371] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:48:10,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564017822] [2022-11-23 13:48:10,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:10,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:48:10,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:48:10,996 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:48:10,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-23 13:48:11,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:11,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-23 13:48:11,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:48:11,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 13:48:11,444 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 [2022-11-23 13:48:11,452 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 [2022-11-23 13:48:11,578 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-23 13:48:11,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2022-11-23 13:48:11,630 INFO L321 Elim1Store]: treesize reduction 26, result has 33.3 percent of original size [2022-11-23 13:48:11,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 26 [2022-11-23 13:48:11,674 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 24 treesize of output 24 [2022-11-23 13:48:11,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 13:48:11,711 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 [2022-11-23 13:48:11,714 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 9 [2022-11-23 13:48:11,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:48:11,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:48:11,819 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_687 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_688 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_gl_insert_~node~0#1.base| v_ArrVal_687) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_gl_insert_~node~0#1.base| v_ArrVal_688) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|)))) (forall ((v_ArrVal_687 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_gl_insert_~node~0#1.base| v_ArrVal_687) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0))))) is different from false [2022-11-23 13:48:13,166 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:48:13,166 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 32 [2022-11-23 13:48:13,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:48:13,171 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 14 [2022-11-23 13:48:13,191 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:48:13,191 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 43 [2022-11-23 13:48:13,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:48:13,196 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 40 treesize of output 32 [2022-11-23 13:48:13,208 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:48:13,208 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2022-11-23 13:48:13,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:48:13,213 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 25 treesize of output 17 [2022-11-23 13:48:13,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564017822] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:48:13,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:48:13,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 15] total 27 [2022-11-23 13:48:13,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94852779] [2022-11-23 13:48:13,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:48:13,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-23 13:48:13,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:48:13,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-23 13:48:13,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1184, Unknown=15, NotChecked=292, Total=1640 [2022-11-23 13:48:13,461 INFO L87 Difference]: Start difference. First operand 183 states and 213 transitions. Second operand has 28 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 13:48:19,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:19,295 INFO L93 Difference]: Finished difference Result 220 states and 240 transitions. [2022-11-23 13:48:19,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-23 13:48:19,296 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-11-23 13:48:19,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:19,297 INFO L225 Difference]: With dead ends: 220 [2022-11-23 13:48:19,297 INFO L226 Difference]: Without dead ends: 220 [2022-11-23 13:48:19,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=455, Invalid=2302, Unknown=15, NotChecked=420, Total=3192 [2022-11-23 13:48:19,299 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 517 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 1271 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 1365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:19,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 573 Invalid, 1365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1271 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-23 13:48:19,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-11-23 13:48:19,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 169. [2022-11-23 13:48:19,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 111 states have (on average 1.5495495495495495) internal successors, (172), 148 states have internal predecessors, (172), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-23 13:48:19,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 198 transitions. [2022-11-23 13:48:19,306 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 198 transitions. Word has length 26 [2022-11-23 13:48:19,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:19,306 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 198 transitions. [2022-11-23 13:48:19,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 13:48:19,307 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 198 transitions. [2022-11-23 13:48:19,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-23 13:48:19,307 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:19,307 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:48:19,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-23 13:48:19,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-23 13:48:19,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-23 13:48:19,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:48:19,921 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:48:19,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:19,922 INFO L85 PathProgramCache]: Analyzing trace with hash -961621695, now seen corresponding path program 1 times [2022-11-23 13:48:19,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:48:19,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1779212546] [2022-11-23 13:48:19,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:19,922 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 [2022-11-23 13:48:19,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:48:19,923 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:48:19,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-23 13:48:20,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:20,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 13:48:20,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:48:20,223 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 [2022-11-23 13:48:20,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:48:20,529 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:48:20,530 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:48:20,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1779212546] [2022-11-23 13:48:20,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1779212546] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:20,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:48:20,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-23 13:48:20,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982685206] [2022-11-23 13:48:20,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:20,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 13:48:20,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:48:20,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 13:48:20,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-23 13:48:20,531 INFO L87 Difference]: Start difference. First operand 169 states and 198 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 13:48:21,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:21,818 INFO L93 Difference]: Finished difference Result 191 states and 210 transitions. [2022-11-23 13:48:21,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-23 13:48:21,819 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (2), 2 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 31 [2022-11-23 13:48:21,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:21,820 INFO L225 Difference]: With dead ends: 191 [2022-11-23 13:48:21,821 INFO L226 Difference]: Without dead ends: 191 [2022-11-23 13:48:21,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-11-23 13:48:21,822 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 329 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:21,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 692 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 13:48:21,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-11-23 13:48:21,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 167. [2022-11-23 13:48:21,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 109 states have (on average 1.5504587155963303) internal successors, (169), 146 states have internal predecessors, (169), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-23 13:48:21,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 195 transitions. [2022-11-23 13:48:21,829 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 195 transitions. Word has length 31 [2022-11-23 13:48:21,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:21,829 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 195 transitions. [2022-11-23 13:48:21,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 13:48:21,829 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 195 transitions. [2022-11-23 13:48:21,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-23 13:48:21,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:21,831 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:48:21,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-23 13:48:22,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:48:22,043 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:48:22,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:22,043 INFO L85 PathProgramCache]: Analyzing trace with hash -149006513, now seen corresponding path program 1 times [2022-11-23 13:48:22,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:48:22,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [422769737] [2022-11-23 13:48:22,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:22,044 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:48:22,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:48:22,045 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:48:22,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-23 13:48:22,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:22,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-23 13:48:22,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:48:22,363 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 [2022-11-23 13:48:22,712 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:48:22,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:48:22,712 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:48:22,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [422769737] [2022-11-23 13:48:22,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [422769737] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:22,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:48:22,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-23 13:48:22,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858009561] [2022-11-23 13:48:22,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:22,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 13:48:22,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:48:22,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 13:48:22,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-23 13:48:22,714 INFO L87 Difference]: Start difference. First operand 167 states and 195 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 13:48:24,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:24,124 INFO L93 Difference]: Finished difference Result 191 states and 209 transitions. [2022-11-23 13:48:24,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-23 13:48:24,125 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (3), 2 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 37 [2022-11-23 13:48:24,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:24,126 INFO L225 Difference]: With dead ends: 191 [2022-11-23 13:48:24,126 INFO L226 Difference]: Without dead ends: 191 [2022-11-23 13:48:24,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-11-23 13:48:24,127 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 224 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:24,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 719 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-23 13:48:24,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-11-23 13:48:24,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 167. [2022-11-23 13:48:24,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 109 states have (on average 1.5412844036697249) internal successors, (168), 146 states have internal predecessors, (168), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-23 13:48:24,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 194 transitions. [2022-11-23 13:48:24,134 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 194 transitions. Word has length 37 [2022-11-23 13:48:24,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:24,135 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 194 transitions. [2022-11-23 13:48:24,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 13:48:24,135 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 194 transitions. [2022-11-23 13:48:24,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-23 13:48:24,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:24,136 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:48:24,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-23 13:48:24,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:48:24,343 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:48:24,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:24,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1437435270, now seen corresponding path program 1 times [2022-11-23 13:48:24,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:48:24,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [664442060] [2022-11-23 13:48:24,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:24,347 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:48:24,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:48:24,348 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:48:24,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-23 13:48:24,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:24,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 13:48:24,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:48:24,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 13:48:24,731 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 [2022-11-23 13:48:24,855 INFO L321 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2022-11-23 13:48:24,855 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 23 treesize of output 35 [2022-11-23 13:48:24,885 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 [2022-11-23 13:48:24,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 13:48:24,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:48:24,985 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:48:24,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [664442060] [2022-11-23 13:48:24,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [664442060] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:24,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:48:24,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-23 13:48:24,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914420591] [2022-11-23 13:48:24,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:24,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 13:48:24,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:48:24,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 13:48:24,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-23 13:48:24,987 INFO L87 Difference]: Start difference. First operand 167 states and 194 transitions. Second operand has 12 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 13:48:27,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:27,438 INFO L93 Difference]: Finished difference Result 252 states and 283 transitions. [2022-11-23 13:48:27,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 13:48:27,439 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-11-23 13:48:27,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:27,441 INFO L225 Difference]: With dead ends: 252 [2022-11-23 13:48:27,441 INFO L226 Difference]: Without dead ends: 252 [2022-11-23 13:48:27,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2022-11-23 13:48:27,442 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 430 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:27,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 487 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-23 13:48:27,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-11-23 13:48:27,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 172. [2022-11-23 13:48:27,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 113 states have (on average 1.5221238938053097) internal successors, (172), 150 states have internal predecessors, (172), 13 states have call successors, (13), 9 states have call predecessors, (13), 9 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-23 13:48:27,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 198 transitions. [2022-11-23 13:48:27,449 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 198 transitions. Word has length 39 [2022-11-23 13:48:27,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:27,449 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 198 transitions. [2022-11-23 13:48:27,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 13:48:27,450 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 198 transitions. [2022-11-23 13:48:27,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-23 13:48:27,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:27,451 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:48:27,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-23 13:48:27,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:48:27,664 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:48:27,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:27,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1437435269, now seen corresponding path program 1 times [2022-11-23 13:48:27,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:48:27,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1737874808] [2022-11-23 13:48:27,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:27,665 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:48:27,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:48:27,666 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:48:27,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-23 13:48:27,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:27,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-23 13:48:27,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:48:27,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 13:48:27,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 13:48:28,187 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 [2022-11-23 13:48:28,194 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 [2022-11-23 13:48:28,462 INFO L321 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2022-11-23 13:48:28,462 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 17 treesize of output 17 [2022-11-23 13:48:28,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-23 13:48:28,557 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 [2022-11-23 13:48:28,562 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 9 [2022-11-23 13:48:28,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:48:28,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:48:35,506 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:48:35,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1737874808] [2022-11-23 13:48:35,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1737874808] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:48:35,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [282802739] [2022-11-23 13:48:35,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:35,507 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:48:35,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:48:35,508 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:48:35,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-23 13:48:35,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:35,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-23 13:48:36,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:48:36,006 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 9 treesize of output 3 [2022-11-23 13:48:36,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 13:48:36,762 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 [2022-11-23 13:48:36,772 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 [2022-11-23 13:48:37,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:48:37,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-23 13:48:39,713 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-11-23 13:48:39,713 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 31 treesize of output 24 [2022-11-23 13:48:39,729 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 [2022-11-23 13:48:40,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:48:40,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:48:40,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [282802739] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:48:40,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690535879] [2022-11-23 13:48:40,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:40,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:48:40,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:48:40,615 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:48:40,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-23 13:48:40,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:40,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-23 13:48:40,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:48:40,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 13:48:40,816 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 [2022-11-23 13:48:41,019 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 [2022-11-23 13:48:41,026 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 [2022-11-23 13:48:41,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:48:41,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-23 13:48:41,204 INFO L321 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2022-11-23 13:48:41,204 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 17 treesize of output 17 [2022-11-23 13:48:41,262 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 [2022-11-23 13:48:41,265 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 9 [2022-11-23 13:48:41,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:48:41,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:48:43,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690535879] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:48:43,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:48:43,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-23 13:48:43,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77991762] [2022-11-23 13:48:43,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:48:43,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 13:48:43,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:48:43,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 13:48:43,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=891, Unknown=2, NotChecked=0, Total=992 [2022-11-23 13:48:43,605 INFO L87 Difference]: Start difference. First operand 172 states and 198 transitions. Second operand has 25 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 13:48:47,501 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] [2022-11-23 13:48:55,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 13:49:00,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 13:49:02,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 13:49:04,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 13:49:06,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 13:49:08,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 13:49:11,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 13:49:14,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 13:49:16,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 13:49:18,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 13:49:20,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 13:49:23,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:49:23,932 INFO L93 Difference]: Finished difference Result 272 states and 295 transitions. [2022-11-23 13:49:23,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-23 13:49:23,933 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) Word has length 39 [2022-11-23 13:49:23,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:49:23,934 INFO L225 Difference]: With dead ends: 272 [2022-11-23 13:49:23,934 INFO L226 Difference]: Without dead ends: 272 [2022-11-23 13:49:23,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=416, Invalid=2233, Unknown=3, NotChecked=0, Total=2652 [2022-11-23 13:49:23,936 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 920 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 1673 mSolverCounterSat, 167 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 920 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 1850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 1673 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:49:23,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [920 Valid, 678 Invalid, 1850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 1673 Invalid, 10 Unknown, 0 Unchecked, 32.2s Time] [2022-11-23 13:49:23,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-11-23 13:49:23,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 177. [2022-11-23 13:49:23,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 117 states have (on average 1.4871794871794872) internal successors, (174), 154 states have internal predecessors, (174), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-23 13:49:23,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 200 transitions. [2022-11-23 13:49:23,943 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 200 transitions. Word has length 39 [2022-11-23 13:49:23,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:49:23,944 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 200 transitions. [2022-11-23 13:49:23,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 13:49:23,944 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 200 transitions. [2022-11-23 13:49:23,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-23 13:49:23,945 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:49:23,945 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:49:23,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2022-11-23 13:49:24,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-23 13:49:24,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-23 13:49:24,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:49:24,559 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:49:24,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:49:24,560 INFO L85 PathProgramCache]: Analyzing trace with hash -410698476, now seen corresponding path program 1 times [2022-11-23 13:49:24,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:49:24,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [773359596] [2022-11-23 13:49:24,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:49:24,560 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:49:24,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:49:24,561 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:49:24,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-23 13:49:24,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:49:24,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-23 13:49:24,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:49:24,942 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 13:49:24,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 13:49:24,974 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 14 treesize of output 16 [2022-11-23 13:49:24,986 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 7 treesize of output 3 [2022-11-23 13:49:25,191 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 [2022-11-23 13:49:25,257 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 [2022-11-23 13:49:25,319 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-23 13:49:25,320 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 30 [2022-11-23 13:49:25,330 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 [2022-11-23 13:49:25,469 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 43 treesize of output 35 [2022-11-23 13:49:25,924 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 23 treesize of output 15 [2022-11-23 13:49:26,268 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-23 13:49:26,269 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 14 [2022-11-23 13:49:26,471 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:49:26,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:49:26,918 INFO L321 Elim1Store]: treesize reduction 7, result has 68.2 percent of original size [2022-11-23 13:49:26,919 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 28 treesize of output 27 [2022-11-23 13:49:27,120 INFO L321 Elim1Store]: treesize reduction 7, result has 68.2 percent of original size [2022-11-23 13:49:27,120 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 28 treesize of output 27 [2022-11-23 13:49:28,874 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 76 treesize of output 72 [2022-11-23 13:49:39,867 INFO L321 Elim1Store]: treesize reduction 132, result has 62.2 percent of original size [2022-11-23 13:49:39,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 34088 treesize of output 29060 [2022-11-23 13:56:41,791 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-23 13:56:49,030 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:56:49,031 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:56:49,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [773359596] [2022-11-23 13:56:49,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [773359596] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 13:56:49,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:56:49,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [20] total 41 [2022-11-23 13:56:49,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211085813] [2022-11-23 13:56:49,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:56:49,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-23 13:56:49,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:56:49,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-23 13:56:49,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1566, Unknown=23, NotChecked=0, Total=1722 [2022-11-23 13:56:49,033 INFO L87 Difference]: Start difference. First operand 177 states and 200 transitions. Second operand has 22 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-23 13:56:49,605 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_gl_insert_~node~0#1.base_30| (_ BitVec 32))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_gl_insert_~node~0#1.base_30|) (_ bv0 1))) (forall ((v_ArrVal_1021 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_gl_insert_~node~0#1.base_30| v_ArrVal_1021) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|) |c_~#gl_list~0.base|)))) (= (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|)) (select (select |c_#memory_$Pointer$.offset| |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|)) |c_~#gl_list~0.base|) (forall ((v_ArrVal_1021 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_gl_insert_~node~0#1.base| v_ArrVal_1021) |c_~#gl_list~0.base|) |c_~#gl_list~0.offset|) |c_~#gl_list~0.base|))) is different from false [2022-11-23 13:56:57,674 WARN L233 SmtUtils]: Spent 6.70s on a formula simplification. DAG size of input: 70 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:57:16,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:57:16,360 INFO L93 Difference]: Finished difference Result 314 states and 354 transitions. [2022-11-23 13:57:16,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-23 13:57:16,361 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 49 [2022-11-23 13:57:16,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:57:16,362 INFO L225 Difference]: With dead ends: 314 [2022-11-23 13:57:16,362 INFO L226 Difference]: Without dead ends: 314 [2022-11-23 13:57:16,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1078 ImplicationChecksByTransitivity, 37.2s TimeCoverageRelationStatistics Valid=445, Invalid=5082, Unknown=27, NotChecked=146, Total=5700 [2022-11-23 13:57:16,365 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 530 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 1700 mSolverCounterSat, 128 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 1840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1700 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-11-23 13:57:16,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 744 Invalid, 1840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1700 Invalid, 11 Unknown, 1 Unchecked, 7.6s Time] [2022-11-23 13:57:16,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-11-23 13:57:16,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 220. [2022-11-23 13:57:16,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 151 states have (on average 1.4105960264900663) internal successors, (213), 188 states have internal predecessors, (213), 18 states have call successors, (18), 14 states have call predecessors, (18), 14 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-23 13:57:16,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 249 transitions. [2022-11-23 13:57:16,376 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 249 transitions. Word has length 49 [2022-11-23 13:57:16,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:57:16,377 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 249 transitions. [2022-11-23 13:57:16,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-23 13:57:16,377 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 249 transitions. [2022-11-23 13:57:16,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-23 13:57:16,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:57:16,379 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:57:16,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-11-23 13:57:16,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:57:16,595 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [val_from_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, val_from_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, list_emptyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-23 13:57:16,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:57:16,595 INFO L85 PathProgramCache]: Analyzing trace with hash -410698475, now seen corresponding path program 1 times [2022-11-23 13:57:16,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:57:16,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [712577889] [2022-11-23 13:57:16,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:16,596 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:57:16,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:57:16,597 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:57:16,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03c1d044-e802-4a35-b33a-a5c260ee0e6a/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-23 13:57:16,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:57:16,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-23 13:57:16,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:57:16,996 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 13:57:16,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 13:57:17,065 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 14 treesize of output 16 [2022-11-23 13:57:17,078 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 14 treesize of output 16 [2022-11-23 13:57:17,097 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 7 treesize of output 3 [2022-11-23 13:57:17,111 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 7 treesize of output 3 [2022-11-23 13:57:17,482 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 [2022-11-23 13:57:17,506 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 [2022-11-23 13:57:17,617 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 [2022-11-23 13:57:17,656 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 [2022-11-23 13:57:17,750 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-23 13:57:17,750 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 30 [2022-11-23 13:57:17,815 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-23 13:57:17,816 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 27 treesize of output 38 [2022-11-23 13:57:18,098 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 43 treesize of output 35 [2022-11-23 13:57:18,117 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 43 treesize of output 35 [2022-11-23 13:57:19,152 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-23 13:57:19,152 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 36 [2022-11-23 13:57:19,158 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 10 [2022-11-23 13:57:19,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 13:57:19,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:57:29,048 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:57:29,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 54649 treesize of output 48449 [2022-11-23 13:57:31,635 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 77416 treesize of output 76376