./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext/tree_dsw.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext/tree_dsw.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8 --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6527731a1486e677feb1440c4f57330edff23abded92b5eda1225729ba969b33 --- 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-e04fb08 [2022-11-16 11:13:32,937 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:13:32,944 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:13:32,990 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:13:32,990 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:13:32,991 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:13:32,993 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:13:32,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:13:32,997 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:13:32,998 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:13:33,005 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:13:33,009 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:13:33,010 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:13:33,018 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:13:33,019 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:13:33,021 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:13:33,022 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:13:33,023 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:13:33,024 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:13:33,027 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:13:33,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:13:33,036 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:13:33,042 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:13:33,044 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:13:33,054 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:13:33,054 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:13:33,054 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:13:33,055 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:13:33,056 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:13:33,057 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:13:33,057 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:13:33,058 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:13:33,059 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:13:33,060 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:13:33,061 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:13:33,061 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:13:33,062 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:13:33,069 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:13:33,071 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:13:33,072 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:13:33,072 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:13:33,073 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-16 11:13:33,121 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:13:33,121 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:13:33,122 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:13:33,122 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:13:33,123 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:13:33,123 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:13:33,124 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:13:33,124 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:13:33,124 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:13:33,125 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:13:33,126 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:13:33,126 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 11:13:33,126 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:13:33,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:13:33,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:13:33,127 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 11:13:33,127 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 11:13:33,127 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 11:13:33,128 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:13:33,128 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 11:13:33,128 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:13:33,128 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:13:33,128 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:13:33,129 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:13:33,130 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:13:33,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:13:33,131 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:13:33,131 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:13:33,131 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:13:33,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:13:33,132 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_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6527731a1486e677feb1440c4f57330edff23abded92b5eda1225729ba969b33 [2022-11-16 11:13:33,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:13:33,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:13:33,485 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:13:33,487 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:13:33,488 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:13:33,489 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/memsafety-ext/tree_dsw.i [2022-11-16 11:13:33,570 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/data/aa962e08b/548507a915b443d09e15cb4097ee6d22/FLAG87176a017 [2022-11-16 11:13:34,152 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:13:34,161 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/sv-benchmarks/c/memsafety-ext/tree_dsw.i [2022-11-16 11:13:34,174 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/data/aa962e08b/548507a915b443d09e15cb4097ee6d22/FLAG87176a017 [2022-11-16 11:13:34,455 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/data/aa962e08b/548507a915b443d09e15cb4097ee6d22 [2022-11-16 11:13:34,458 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:13:34,459 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:13:34,463 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:13:34,463 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:13:34,468 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:13:34,469 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:13:34" (1/1) ... [2022-11-16 11:13:34,470 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1965f417 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:13:34, skipping insertion in model container [2022-11-16 11:13:34,471 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:13:34" (1/1) ... [2022-11-16 11:13:34,480 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:13:34,527 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:13:35,029 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:13:35,049 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) [2022-11-16 11:13:35,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@722d2d43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:13:35, skipping insertion in model container [2022-11-16 11:13:35,051 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:13:35,052 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-16 11:13:35,055 INFO L158 Benchmark]: Toolchain (without parser) took 594.33ms. Allocated memory is still 138.4MB. Free memory was 99.7MB in the beginning and 111.0MB in the end (delta: -11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 11:13:35,057 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 138.4MB. Free memory was 118.0MB in the beginning and 117.9MB in the end (delta: 118.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 11:13:35,060 INFO L158 Benchmark]: CACSL2BoogieTranslator took 589.16ms. Allocated memory is still 138.4MB. Free memory was 99.6MB in the beginning and 111.0MB in the end (delta: -11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 11:13:35,063 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 138.4MB. Free memory was 118.0MB in the beginning and 117.9MB in the end (delta: 118.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 589.16ms. Allocated memory is still 138.4MB. Free memory was 99.6MB in the beginning and 111.0MB in the end (delta: -11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 571]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext/tree_dsw.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8 --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6527731a1486e677feb1440c4f57330edff23abded92b5eda1225729ba969b33 --- 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-e04fb08 [2022-11-16 11:13:37,561 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:13:37,563 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:13:37,585 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:13:37,585 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:13:37,587 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:13:37,588 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:13:37,590 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:13:37,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:13:37,594 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:13:37,595 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:13:37,596 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:13:37,597 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:13:37,598 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:13:37,600 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:13:37,601 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:13:37,602 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:13:37,603 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:13:37,605 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:13:37,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:13:37,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:13:37,615 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:13:37,616 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:13:37,618 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:13:37,624 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:13:37,634 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:13:37,635 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:13:37,636 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:13:37,637 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:13:37,638 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:13:37,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:13:37,639 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:13:37,640 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:13:37,643 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:13:37,647 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:13:37,648 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:13:37,649 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:13:37,649 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:13:37,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:13:37,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:13:37,654 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:13:37,655 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-16 11:13:37,704 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:13:37,705 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:13:37,706 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:13:37,706 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:13:37,707 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:13:37,708 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:13:37,710 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:13:37,710 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:13:37,710 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:13:37,711 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:13:37,712 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:13:37,712 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 11:13:37,712 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:13:37,713 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:13:37,713 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:13:37,713 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 11:13:37,713 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 11:13:37,713 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 11:13:37,714 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:13:37,714 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 11:13:37,714 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-16 11:13:37,714 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-16 11:13:37,715 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:13:37,715 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:13:37,715 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:13:37,716 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:13:37,716 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:13:37,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:13:37,716 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:13:37,717 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:13:37,717 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-16 11:13:37,717 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-16 11:13:37,718 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-16 11:13:37,718 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_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6527731a1486e677feb1440c4f57330edff23abded92b5eda1225729ba969b33 [2022-11-16 11:13:38,175 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:13:38,212 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:13:38,214 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:13:38,215 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:13:38,219 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:13:38,221 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/memsafety-ext/tree_dsw.i [2022-11-16 11:13:38,309 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/data/60c4a1c29/9228e8a2df134b69bb5c2d456b7cf080/FLAG84781f9e9 [2022-11-16 11:13:38,915 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:13:38,916 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/sv-benchmarks/c/memsafety-ext/tree_dsw.i [2022-11-16 11:13:38,937 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/data/60c4a1c29/9228e8a2df134b69bb5c2d456b7cf080/FLAG84781f9e9 [2022-11-16 11:13:39,192 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/data/60c4a1c29/9228e8a2df134b69bb5c2d456b7cf080 [2022-11-16 11:13:39,195 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:13:39,198 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:13:39,204 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:13:39,204 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:13:39,209 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:13:39,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:13:39" (1/1) ... [2022-11-16 11:13:39,212 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@596148d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:13:39, skipping insertion in model container [2022-11-16 11:13:39,212 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:13:39" (1/1) ... [2022-11-16 11:13:39,221 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:13:39,273 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:13:39,723 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:13:39,736 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-16 11:13:39,743 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:13:39,778 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:13:39,781 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:13:39,841 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:13:39,885 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:13:39,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:13:39 WrapperNode [2022-11-16 11:13:39,886 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:13:39,888 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:13:39,888 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:13:39,889 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:13:39,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:13:39" (1/1) ... [2022-11-16 11:13:39,934 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:13:39" (1/1) ... [2022-11-16 11:13:39,977 INFO L138 Inliner]: procedures = 125, calls = 52, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 155 [2022-11-16 11:13:39,977 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:13:39,978 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:13:39,978 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:13:39,979 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:13:39,988 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:13:39" (1/1) ... [2022-11-16 11:13:39,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:13:39" (1/1) ... [2022-11-16 11:13:40,012 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:13:39" (1/1) ... [2022-11-16 11:13:40,013 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:13:39" (1/1) ... [2022-11-16 11:13:40,024 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:13:39" (1/1) ... [2022-11-16 11:13:40,044 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:13:39" (1/1) ... [2022-11-16 11:13:40,046 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:13:39" (1/1) ... [2022-11-16 11:13:40,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:13:39" (1/1) ... [2022-11-16 11:13:40,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:13:40,064 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:13:40,065 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:13:40,065 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:13:40,066 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:13:39" (1/1) ... [2022-11-16 11:13:40,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:13:40,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:13:40,136 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:13:40,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:13:40,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:13:40,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:13:40,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:13:40,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-16 11:13:40,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-16 11:13:40,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:13:40,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-16 11:13:40,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:13:40,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:13:40,358 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:13:40,360 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:13:41,440 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:13:41,452 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:13:41,452 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-16 11:13:41,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:13:41 BoogieIcfgContainer [2022-11-16 11:13:41,455 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:13:41,458 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:13:41,459 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:13:41,463 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:13:41,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:13:39" (1/3) ... [2022-11-16 11:13:41,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@724d5d2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:13:41, skipping insertion in model container [2022-11-16 11:13:41,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:13:39" (2/3) ... [2022-11-16 11:13:41,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@724d5d2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:13:41, skipping insertion in model container [2022-11-16 11:13:41,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:13:41" (3/3) ... [2022-11-16 11:13:41,467 INFO L112 eAbstractionObserver]: Analyzing ICFG tree_dsw.i [2022-11-16 11:13:41,491 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:13:41,492 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 77 error locations. [2022-11-16 11:13:41,601 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:13:41,619 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;@7aec593c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:13:41,619 INFO L358 AbstractCegarLoop]: Starting to check reachability of 77 error locations. [2022-11-16 11:13:41,625 INFO L276 IsEmpty]: Start isEmpty. Operand has 155 states, 77 states have (on average 2.207792207792208) internal successors, (170), 154 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:41,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 11:13:41,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:13:41,634 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 11:13:41,635 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-16 11:13:41,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:41,645 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2022-11-16 11:13:41,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:13:41,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [373855802] [2022-11-16 11:13:41,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:41,663 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 [2022-11-16 11:13:41,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:13:41,669 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:13:41,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:13:41,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:41,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:13:41,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:13:41,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 11:13:41,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:41,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:13:41,904 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:13:41,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [373855802] [2022-11-16 11:13:41,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [373855802] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:13:41,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:13:41,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:13:41,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119452799] [2022-11-16 11:13:41,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:13:41,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:13:41,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:13:41,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:13:41,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:13:41,971 INFO L87 Difference]: Start difference. First operand has 155 states, 77 states have (on average 2.207792207792208) internal successors, (170), 154 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:42,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:13:42,409 INFO L93 Difference]: Finished difference Result 169 states and 181 transitions. [2022-11-16 11:13:42,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:13:42,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-16 11:13:42,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:13:42,426 INFO L225 Difference]: With dead ends: 169 [2022-11-16 11:13:42,427 INFO L226 Difference]: Without dead ends: 167 [2022-11-16 11:13:42,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:13:42,433 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 117 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:13:42,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 127 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:13:42,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-11-16 11:13:42,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 151. [2022-11-16 11:13:42,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 76 states have (on average 2.1315789473684212) internal successors, (162), 150 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:42,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 162 transitions. [2022-11-16 11:13:42,509 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 162 transitions. Word has length 3 [2022-11-16 11:13:42,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:13:42,510 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 162 transitions. [2022-11-16 11:13:42,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:42,511 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 162 transitions. [2022-11-16 11:13:42,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 11:13:42,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:13:42,512 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 11:13:42,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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)] Ended with exit code 0 [2022-11-16 11:13:42,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:13:42,726 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-16 11:13:42,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:42,726 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2022-11-16 11:13:42,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:13:42,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [260605690] [2022-11-16 11:13:42,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:42,728 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 [2022-11-16 11:13:42,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:13:42,729 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:13:42,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:13:42,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:42,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:13:42,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:13:42,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:13:42,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:42,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:13:42,834 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:13:42,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [260605690] [2022-11-16 11:13:42,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [260605690] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:13:42,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:13:42,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:13:42,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118000009] [2022-11-16 11:13:42,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:13:42,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:13:42,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:13:42,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:13:42,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:13:42,838 INFO L87 Difference]: Start difference. First operand 151 states and 162 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:43,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:13:43,236 INFO L93 Difference]: Finished difference Result 149 states and 160 transitions. [2022-11-16 11:13:43,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:13:43,237 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-16 11:13:43,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:13:43,238 INFO L225 Difference]: With dead ends: 149 [2022-11-16 11:13:43,238 INFO L226 Difference]: Without dead ends: 149 [2022-11-16 11:13:43,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:13:43,240 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 152 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:13:43,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 83 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:13:43,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-11-16 11:13:43,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2022-11-16 11:13:43,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 76 states have (on average 2.1052631578947367) internal successors, (160), 148 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:43,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 160 transitions. [2022-11-16 11:13:43,250 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 160 transitions. Word has length 3 [2022-11-16 11:13:43,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:13:43,250 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 160 transitions. [2022-11-16 11:13:43,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:43,251 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 160 transitions. [2022-11-16 11:13:43,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 11:13:43,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:13:43,252 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 11:13:43,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:13:43,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:13:43,466 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-16 11:13:43,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:43,466 INFO L85 PathProgramCache]: Analyzing trace with hash 889446412, now seen corresponding path program 1 times [2022-11-16 11:13:43,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:13:43,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1285764704] [2022-11-16 11:13:43,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:43,467 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 [2022-11-16 11:13:43,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:13:43,469 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:13:43,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:13:43,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:43,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:13:43,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:13:43,557 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 [2022-11-16 11:13:43,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:43,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:13:43,585 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:13:43,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1285764704] [2022-11-16 11:13:43,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1285764704] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:13:43,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:13:43,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:13:43,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579483185] [2022-11-16 11:13:43,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:13:43,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:13:43,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:13:43,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:13:43,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:13:43,588 INFO L87 Difference]: Start difference. First operand 149 states and 160 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:44,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:13:44,135 INFO L93 Difference]: Finished difference Result 159 states and 174 transitions. [2022-11-16 11:13:44,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:13:44,136 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 11:13:44,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:13:44,137 INFO L225 Difference]: With dead ends: 159 [2022-11-16 11:13:44,137 INFO L226 Difference]: Without dead ends: 159 [2022-11-16 11:13:44,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:13:44,139 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 206 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:13:44,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 91 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:13:44,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-11-16 11:13:44,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 134. [2022-11-16 11:13:44,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 79 states have (on average 1.8734177215189873) internal successors, (148), 133 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:44,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 148 transitions. [2022-11-16 11:13:44,149 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 148 transitions. Word has length 6 [2022-11-16 11:13:44,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:13:44,149 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 148 transitions. [2022-11-16 11:13:44,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:44,150 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 148 transitions. [2022-11-16 11:13:44,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 11:13:44,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:13:44,151 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 11:13:44,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:13:44,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:13:44,365 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-16 11:13:44,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:44,366 INFO L85 PathProgramCache]: Analyzing trace with hash 889446413, now seen corresponding path program 1 times [2022-11-16 11:13:44,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:13:44,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [722295193] [2022-11-16 11:13:44,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:44,367 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 [2022-11-16 11:13:44,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:13:44,369 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:13:44,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:13:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:44,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:13:44,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:13:44,476 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 [2022-11-16 11:13:44,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:44,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:13:44,542 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:13:44,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [722295193] [2022-11-16 11:13:44,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [722295193] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:13:44,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:13:44,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:13:44,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584124642] [2022-11-16 11:13:44,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:13:44,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:13:44,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:13:44,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:13:44,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:13:44,544 INFO L87 Difference]: Start difference. First operand 134 states and 148 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:45,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:13:45,197 INFO L93 Difference]: Finished difference Result 185 states and 204 transitions. [2022-11-16 11:13:45,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:13:45,198 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 11:13:45,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:13:45,200 INFO L225 Difference]: With dead ends: 185 [2022-11-16 11:13:45,200 INFO L226 Difference]: Without dead ends: 185 [2022-11-16 11:13:45,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:13:45,201 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 242 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:13:45,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 110 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 11:13:45,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-16 11:13:45,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 165. [2022-11-16 11:13:45,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 110 states have (on average 1.709090909090909) internal successors, (188), 164 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:45,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 188 transitions. [2022-11-16 11:13:45,211 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 188 transitions. Word has length 6 [2022-11-16 11:13:45,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:13:45,211 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 188 transitions. [2022-11-16 11:13:45,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:45,211 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 188 transitions. [2022-11-16 11:13:45,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:13:45,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:13:45,212 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:13:45,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:13:45,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:13:45,431 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-16 11:13:45,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:45,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1845826674, now seen corresponding path program 1 times [2022-11-16 11:13:45,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:13:45,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [868303929] [2022-11-16 11:13:45,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:45,433 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:13:45,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:13:45,436 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:13:45,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:13:45,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:45,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:13:45,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:13:45,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 11:13:45,575 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:13:45,575 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 [2022-11-16 11:13:45,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:45,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:13:45,589 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:13:45,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [868303929] [2022-11-16 11:13:45,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [868303929] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:13:45,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:13:45,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:13:45,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253596584] [2022-11-16 11:13:45,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:13:45,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:13:45,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:13:45,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:13:45,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:13:45,593 INFO L87 Difference]: Start difference. First operand 165 states and 188 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:46,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:13:46,008 INFO L93 Difference]: Finished difference Result 182 states and 205 transitions. [2022-11-16 11:13:46,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:13:46,009 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 11:13:46,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:13:46,010 INFO L225 Difference]: With dead ends: 182 [2022-11-16 11:13:46,010 INFO L226 Difference]: Without dead ends: 182 [2022-11-16 11:13:46,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:13:46,011 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 113 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:13:46,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 175 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:13:46,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-11-16 11:13:46,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 165. [2022-11-16 11:13:46,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 110 states have (on average 1.7) internal successors, (187), 164 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:46,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 187 transitions. [2022-11-16 11:13:46,020 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 187 transitions. Word has length 9 [2022-11-16 11:13:46,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:13:46,020 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 187 transitions. [2022-11-16 11:13:46,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:46,020 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 187 transitions. [2022-11-16 11:13:46,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:13:46,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:13:46,021 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:13:46,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:13:46,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:13:46,235 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-16 11:13:46,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:46,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1772597097, now seen corresponding path program 1 times [2022-11-16 11:13:46,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:13:46,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1369214941] [2022-11-16 11:13:46,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:46,236 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 [2022-11-16 11:13:46,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:13:46,237 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:13:46,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:13:46,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:46,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:13:46,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:13:46,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:46,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:13:46,341 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:13:46,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1369214941] [2022-11-16 11:13:46,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1369214941] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:13:46,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:13:46,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:13:46,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759599955] [2022-11-16 11:13:46,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:13:46,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:13:46,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:13:46,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:13:46,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:13:46,345 INFO L87 Difference]: Start difference. First operand 165 states and 187 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:46,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:13:46,363 INFO L93 Difference]: Finished difference Result 167 states and 189 transitions. [2022-11-16 11:13:46,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:13:46,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 11:13:46,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:13:46,365 INFO L225 Difference]: With dead ends: 167 [2022-11-16 11:13:46,365 INFO L226 Difference]: Without dead ends: 167 [2022-11-16 11:13:46,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:13:46,366 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 0 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:13:46,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 276 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:13:46,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-11-16 11:13:46,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2022-11-16 11:13:46,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 112 states have (on average 1.6875) internal successors, (189), 166 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:46,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 189 transitions. [2022-11-16 11:13:46,373 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 189 transitions. Word has length 13 [2022-11-16 11:13:46,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:13:46,373 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 189 transitions. [2022-11-16 11:13:46,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:46,374 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 189 transitions. [2022-11-16 11:13:46,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:13:46,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:13:46,375 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:13:46,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:13:46,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:13:46,587 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-16 11:13:46,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:46,587 INFO L85 PathProgramCache]: Analyzing trace with hash 131239230, now seen corresponding path program 1 times [2022-11-16 11:13:46,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:13:46,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [568016401] [2022-11-16 11:13:46,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:46,588 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 [2022-11-16 11:13:46,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:13:46,589 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:13:46,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:13:46,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:46,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:13:46,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:13:46,709 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 [2022-11-16 11:13:46,731 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 [2022-11-16 11:13:46,775 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 [2022-11-16 11:13:46,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:46,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:13:46,790 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:13:46,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [568016401] [2022-11-16 11:13:46,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [568016401] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:13:46,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:13:46,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:13:46,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259858489] [2022-11-16 11:13:46,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:13:46,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:13:46,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:13:46,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:13:46,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:13:46,795 INFO L87 Difference]: Start difference. First operand 167 states and 189 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:47,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:13:47,346 INFO L93 Difference]: Finished difference Result 166 states and 187 transitions. [2022-11-16 11:13:47,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:13:47,346 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-11-16 11:13:47,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:13:47,347 INFO L225 Difference]: With dead ends: 166 [2022-11-16 11:13:47,347 INFO L226 Difference]: Without dead ends: 166 [2022-11-16 11:13:47,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:13:47,349 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 7 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:13:47,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 328 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:13:47,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-11-16 11:13:47,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2022-11-16 11:13:47,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 112 states have (on average 1.6696428571428572) internal successors, (187), 165 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:47,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 187 transitions. [2022-11-16 11:13:47,358 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 187 transitions. Word has length 15 [2022-11-16 11:13:47,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:13:47,358 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 187 transitions. [2022-11-16 11:13:47,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:47,359 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 187 transitions. [2022-11-16 11:13:47,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:13:47,359 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:13:47,359 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:13:47,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:13:47,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:13:47,571 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-16 11:13:47,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:47,571 INFO L85 PathProgramCache]: Analyzing trace with hash 131239231, now seen corresponding path program 1 times [2022-11-16 11:13:47,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:13:47,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1662852271] [2022-11-16 11:13:47,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:47,572 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 [2022-11-16 11:13:47,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:13:47,573 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:13:47,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:13:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:47,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 11:13:47,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:13:47,704 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 [2022-11-16 11:13:47,737 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 [2022-11-16 11:13:47,747 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 [2022-11-16 11:13:47,795 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 [2022-11-16 11:13:47,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:13:47,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:47,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:13:47,832 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:13:47,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1662852271] [2022-11-16 11:13:47,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1662852271] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:13:47,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:13:47,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:13:47,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98616134] [2022-11-16 11:13:47,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:13:47,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:13:47,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:13:47,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:13:47,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:13:47,839 INFO L87 Difference]: Start difference. First operand 166 states and 187 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:48,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:13:48,573 INFO L93 Difference]: Finished difference Result 165 states and 185 transitions. [2022-11-16 11:13:48,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:13:48,574 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-11-16 11:13:48,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:13:48,575 INFO L225 Difference]: With dead ends: 165 [2022-11-16 11:13:48,575 INFO L226 Difference]: Without dead ends: 165 [2022-11-16 11:13:48,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:13:48,577 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 5 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:13:48,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 310 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:13:48,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-16 11:13:48,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-11-16 11:13:48,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 112 states have (on average 1.6517857142857142) internal successors, (185), 164 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:48,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 185 transitions. [2022-11-16 11:13:48,583 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 185 transitions. Word has length 15 [2022-11-16 11:13:48,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:13:48,584 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 185 transitions. [2022-11-16 11:13:48,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:48,584 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 185 transitions. [2022-11-16 11:13:48,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:13:48,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:13:48,585 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:13:48,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:13:48,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:13:48,786 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-16 11:13:48,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:48,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1899349350, now seen corresponding path program 1 times [2022-11-16 11:13:48,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:13:48,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1528785148] [2022-11-16 11:13:48,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:48,787 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 [2022-11-16 11:13:48,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:13:48,788 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:13:48,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:13:48,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:48,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 11:13:48,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:13:48,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:13:48,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:13:49,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-16 11:13:49,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-16 11:13:49,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:49,058 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:13:49,058 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:13:49,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1528785148] [2022-11-16 11:13:49,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1528785148] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:13:49,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:13:49,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:13:49,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904779948] [2022-11-16 11:13:49,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:13:49,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:13:49,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:13:49,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:13:49,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:13:49,060 INFO L87 Difference]: Start difference. First operand 165 states and 185 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:49,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:13:49,859 INFO L93 Difference]: Finished difference Result 203 states and 230 transitions. [2022-11-16 11:13:49,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:13:49,860 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-11-16 11:13:49,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:13:49,861 INFO L225 Difference]: With dead ends: 203 [2022-11-16 11:13:49,861 INFO L226 Difference]: Without dead ends: 203 [2022-11-16 11:13:49,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:13:49,862 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 48 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:13:49,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 523 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:13:49,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-11-16 11:13:49,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 176. [2022-11-16 11:13:49,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 123 states have (on average 1.6260162601626016) internal successors, (200), 175 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:49,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 200 transitions. [2022-11-16 11:13:49,867 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 200 transitions. Word has length 15 [2022-11-16 11:13:49,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:13:49,868 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 200 transitions. [2022-11-16 11:13:49,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:49,868 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 200 transitions. [2022-11-16 11:13:49,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 11:13:49,868 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:13:49,869 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:13:49,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:13:50,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:13:50,085 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-16 11:13:50,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:50,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1534751881, now seen corresponding path program 1 times [2022-11-16 11:13:50,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:13:50,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1044430347] [2022-11-16 11:13:50,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:50,086 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 [2022-11-16 11:13:50,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:13:50,087 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:13:50,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:13:50,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:50,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:13:50,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:13:50,212 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 [2022-11-16 11:13:50,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:13:50,258 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 11 [2022-11-16 11:13:50,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:50,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:13:50,272 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:13:50,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1044430347] [2022-11-16 11:13:50,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1044430347] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:13:50,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:13:50,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:13:50,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109353603] [2022-11-16 11:13:50,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:13:50,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:13:50,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:13:50,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:13:50,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:13:50,275 INFO L87 Difference]: Start difference. First operand 176 states and 200 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:50,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:13:50,888 INFO L93 Difference]: Finished difference Result 175 states and 198 transitions. [2022-11-16 11:13:50,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:13:50,889 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 11:13:50,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:13:50,890 INFO L225 Difference]: With dead ends: 175 [2022-11-16 11:13:50,890 INFO L226 Difference]: Without dead ends: 175 [2022-11-16 11:13:50,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:13:50,891 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 7 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:13:50,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 323 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 11:13:50,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-16 11:13:50,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2022-11-16 11:13:50,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 123 states have (on average 1.6097560975609757) internal successors, (198), 174 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:50,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 198 transitions. [2022-11-16 11:13:50,897 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 198 transitions. Word has length 17 [2022-11-16 11:13:50,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:13:50,898 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 198 transitions. [2022-11-16 11:13:50,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:50,898 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 198 transitions. [2022-11-16 11:13:50,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 11:13:50,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:13:50,899 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:13:50,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:13:51,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:13:51,112 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-16 11:13:51,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:51,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1534751880, now seen corresponding path program 1 times [2022-11-16 11:13:51,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:13:51,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1670735609] [2022-11-16 11:13:51,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:51,114 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 [2022-11-16 11:13:51,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:13:51,115 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:13:51,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:13:51,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:51,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 11:13:51,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:13:51,251 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 [2022-11-16 11:13:51,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:13:51,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:13:51,346 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 21 treesize of output 9 [2022-11-16 11:13:51,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-16 11:13:51,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:51,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:13:51,372 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:13:51,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1670735609] [2022-11-16 11:13:51,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1670735609] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:13:51,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:13:51,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:13:51,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296070137] [2022-11-16 11:13:51,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:13:51,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:13:51,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:13:51,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:13:51,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:13:51,375 INFO L87 Difference]: Start difference. First operand 175 states and 198 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:52,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:13:52,130 INFO L93 Difference]: Finished difference Result 174 states and 196 transitions. [2022-11-16 11:13:52,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:13:52,131 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 11:13:52,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:13:52,132 INFO L225 Difference]: With dead ends: 174 [2022-11-16 11:13:52,133 INFO L226 Difference]: Without dead ends: 174 [2022-11-16 11:13:52,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:13:52,133 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 5 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:13:52,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 305 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:13:52,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-16 11:13:52,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2022-11-16 11:13:52,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 123 states have (on average 1.5934959349593496) internal successors, (196), 173 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:52,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 196 transitions. [2022-11-16 11:13:52,141 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 196 transitions. Word has length 17 [2022-11-16 11:13:52,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:13:52,141 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 196 transitions. [2022-11-16 11:13:52,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:52,142 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 196 transitions. [2022-11-16 11:13:52,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 11:13:52,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:13:52,143 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:13:52,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:13:52,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:13:52,354 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-16 11:13:52,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:52,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1696190880, now seen corresponding path program 1 times [2022-11-16 11:13:52,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:13:52,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1728848609] [2022-11-16 11:13:52,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:52,355 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 [2022-11-16 11:13:52,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:13:52,356 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:13:52,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:13:52,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:52,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:13:52,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:13:52,498 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 [2022-11-16 11:13:52,505 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 [2022-11-16 11:13:52,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 11:13:52,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 11:13:52,599 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 [2022-11-16 11:13:52,609 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 [2022-11-16 11:13:52,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:52,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:13:52,692 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:13:52,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1728848609] [2022-11-16 11:13:52,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1728848609] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:13:52,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:13:52,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:13:52,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631276656] [2022-11-16 11:13:52,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:13:52,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:13:52,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:13:52,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:13:52,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:13:52,695 INFO L87 Difference]: Start difference. First operand 174 states and 196 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:53,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:13:53,476 INFO L93 Difference]: Finished difference Result 287 states and 315 transitions. [2022-11-16 11:13:53,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:13:53,480 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 11:13:53,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:13:53,481 INFO L225 Difference]: With dead ends: 287 [2022-11-16 11:13:53,481 INFO L226 Difference]: Without dead ends: 287 [2022-11-16 11:13:53,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:13:53,483 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 161 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:13:53,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 588 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:13:53,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-11-16 11:13:53,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 184. [2022-11-16 11:13:53,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 133 states have (on average 1.5488721804511278) internal successors, (206), 183 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:53,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 206 transitions. [2022-11-16 11:13:53,489 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 206 transitions. Word has length 17 [2022-11-16 11:13:53,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:13:53,489 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 206 transitions. [2022-11-16 11:13:53,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:53,489 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 206 transitions. [2022-11-16 11:13:53,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 11:13:53,490 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:13:53,490 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:13:53,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 11:13:53,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:13:53,702 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-16 11:13:53,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:53,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1696188958, now seen corresponding path program 1 times [2022-11-16 11:13:53,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:13:53,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [385732594] [2022-11-16 11:13:53,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:53,703 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 [2022-11-16 11:13:53,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:13:53,704 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:13:53,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:13:53,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:53,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:13:53,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:13:53,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:53,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:13:53,835 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:13:53,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [385732594] [2022-11-16 11:13:53,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [385732594] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:13:53,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:13:53,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:13:53,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406130859] [2022-11-16 11:13:53,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:13:53,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:13:53,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:13:53,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:13:53,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:13:53,838 INFO L87 Difference]: Start difference. First operand 184 states and 206 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:54,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:13:54,356 INFO L93 Difference]: Finished difference Result 225 states and 251 transitions. [2022-11-16 11:13:54,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:13:54,357 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 11:13:54,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:13:54,358 INFO L225 Difference]: With dead ends: 225 [2022-11-16 11:13:54,359 INFO L226 Difference]: Without dead ends: 225 [2022-11-16 11:13:54,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:13:54,360 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 132 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:13:54,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 166 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:13:54,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-11-16 11:13:54,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 186. [2022-11-16 11:13:54,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 135 states have (on average 1.5555555555555556) internal successors, (210), 185 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:54,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 210 transitions. [2022-11-16 11:13:54,366 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 210 transitions. Word has length 17 [2022-11-16 11:13:54,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:13:54,366 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 210 transitions. [2022-11-16 11:13:54,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:54,367 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 210 transitions. [2022-11-16 11:13:54,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 11:13:54,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:13:54,367 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:13:54,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:13:54,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:13:54,575 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-16 11:13:54,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:54,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1696188959, now seen corresponding path program 1 times [2022-11-16 11:13:54,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:13:54,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1187235623] [2022-11-16 11:13:54,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:54,576 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 [2022-11-16 11:13:54,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:13:54,577 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:13:54,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:13:54,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:54,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:13:54,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:13:54,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:54,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:13:54,809 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:13:54,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1187235623] [2022-11-16 11:13:54,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1187235623] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:13:54,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:13:54,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:13:54,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496335283] [2022-11-16 11:13:54,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:13:54,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:13:54,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:13:54,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:13:54,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:13:54,811 INFO L87 Difference]: Start difference. First operand 186 states and 210 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:55,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:13:55,893 INFO L93 Difference]: Finished difference Result 302 states and 335 transitions. [2022-11-16 11:13:55,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:13:55,894 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 11:13:55,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:13:55,895 INFO L225 Difference]: With dead ends: 302 [2022-11-16 11:13:55,896 INFO L226 Difference]: Without dead ends: 302 [2022-11-16 11:13:55,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:13:55,896 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 409 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:13:55,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 306 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 11:13:55,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-11-16 11:13:55,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 189. [2022-11-16 11:13:55,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 138 states have (on average 1.5579710144927537) internal successors, (215), 188 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:55,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 215 transitions. [2022-11-16 11:13:55,909 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 215 transitions. Word has length 17 [2022-11-16 11:13:55,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:13:55,909 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 215 transitions. [2022-11-16 11:13:55,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:55,910 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 215 transitions. [2022-11-16 11:13:55,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:13:55,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:13:55,911 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:13:55,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:13:56,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:13:56,124 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-16 11:13:56,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:56,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1327705298, now seen corresponding path program 1 times [2022-11-16 11:13:56,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:13:56,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [860500229] [2022-11-16 11:13:56,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:56,125 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 [2022-11-16 11:13:56,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:13:56,126 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:13:56,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-16 11:13:56,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:56,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:13:56,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:13:56,263 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 [2022-11-16 11:13:56,309 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:13:56,310 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 [2022-11-16 11:13:56,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:13:56,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 11:13:56,371 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 [2022-11-16 11:13:56,473 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 11:13:56,473 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-11-16 11:13:56,480 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 18 treesize of output 20 [2022-11-16 11:13:56,519 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 13 [2022-11-16 11:13:56,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:13:56,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:56,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:13:56,554 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:13:56,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [860500229] [2022-11-16 11:13:56,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [860500229] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:13:56,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:13:56,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:13:56,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60008185] [2022-11-16 11:13:56,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:13:56,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:13:56,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:13:56,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:13:56,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:13:56,557 INFO L87 Difference]: Start difference. First operand 189 states and 215 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:57,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:13:57,695 INFO L93 Difference]: Finished difference Result 207 states and 234 transitions. [2022-11-16 11:13:57,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:13:57,696 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 11:13:57,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:13:57,697 INFO L225 Difference]: With dead ends: 207 [2022-11-16 11:13:57,697 INFO L226 Difference]: Without dead ends: 207 [2022-11-16 11:13:57,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:13:57,698 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 184 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:13:57,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 195 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 11:13:57,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-11-16 11:13:57,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 188. [2022-11-16 11:13:57,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 138 states have (on average 1.5434782608695652) internal successors, (213), 187 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:57,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 213 transitions. [2022-11-16 11:13:57,703 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 213 transitions. Word has length 18 [2022-11-16 11:13:57,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:13:57,704 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 213 transitions. [2022-11-16 11:13:57,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:13:57,704 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 213 transitions. [2022-11-16 11:13:57,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:13:57,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:13:57,705 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:13:57,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-11-16 11:13:57,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:13:57,918 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-16 11:13:57,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:57,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1327705297, now seen corresponding path program 1 times [2022-11-16 11:13:57,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:13:57,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [846033391] [2022-11-16 11:13:57,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:57,919 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 [2022-11-16 11:13:57,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:13:57,921 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:13:57,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-16 11:13:58,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:58,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:13:58,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:13:58,084 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:13:58,085 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 [2022-11-16 11:13:58,282 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-16 11:13:58,284 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 28 treesize of output 45 [2022-11-16 11:13:58,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 11:13:58,548 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 11:13:58,548 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2022-11-16 11:13:58,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 27 [2022-11-16 11:13:58,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:58,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:13:58,743 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:13:58,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [846033391] [2022-11-16 11:13:58,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [846033391] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:13:58,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:13:58,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:13:58,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926727836] [2022-11-16 11:13:58,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:13:58,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:13:58,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:13:58,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:13:58,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:13:58,745 INFO L87 Difference]: Start difference. First operand 188 states and 213 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:00,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:14:00,039 INFO L93 Difference]: Finished difference Result 206 states and 231 transitions. [2022-11-16 11:14:00,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:14:00,040 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 11:14:00,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:14:00,041 INFO L225 Difference]: With dead ends: 206 [2022-11-16 11:14:00,041 INFO L226 Difference]: Without dead ends: 206 [2022-11-16 11:14:00,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:14:00,042 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 321 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:14:00,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 220 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 339 Invalid, 0 Unknown, 92 Unchecked, 0.8s Time] [2022-11-16 11:14:00,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-11-16 11:14:00,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 187. [2022-11-16 11:14:00,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 138 states have (on average 1.5217391304347827) internal successors, (210), 186 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:00,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 210 transitions. [2022-11-16 11:14:00,049 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 210 transitions. Word has length 18 [2022-11-16 11:14:00,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:14:00,050 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 210 transitions. [2022-11-16 11:14:00,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:00,050 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 210 transitions. [2022-11-16 11:14:00,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:14:00,051 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:14:00,051 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:14:00,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-16 11:14:00,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:14:00,265 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-16 11:14:00,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:14:00,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1042249152, now seen corresponding path program 1 times [2022-11-16 11:14:00,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:14:00,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [466324028] [2022-11-16 11:14:00,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:14:00,266 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 [2022-11-16 11:14:00,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:14:00,267 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:14:00,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:14:00,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:14:00,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:14:00,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:14:00,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:14:00,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:14:00,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:14:00,494 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:14:00,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [466324028] [2022-11-16 11:14:00,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [466324028] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:14:00,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:14:00,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-11-16 11:14:00,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902314909] [2022-11-16 11:14:00,496 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:14:00,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:14:00,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:14:00,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:14:00,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:14:00,497 INFO L87 Difference]: Start difference. First operand 187 states and 210 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:01,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:14:01,076 INFO L93 Difference]: Finished difference Result 264 states and 290 transitions. [2022-11-16 11:14:01,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:14:01,077 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 11:14:01,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:14:01,078 INFO L225 Difference]: With dead ends: 264 [2022-11-16 11:14:01,078 INFO L226 Difference]: Without dead ends: 264 [2022-11-16 11:14:01,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:14:01,079 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 311 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:14:01,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 467 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:14:01,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-11-16 11:14:01,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 186. [2022-11-16 11:14:01,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 137 states have (on average 1.5182481751824817) internal successors, (208), 185 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:01,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 208 transitions. [2022-11-16 11:14:01,087 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 208 transitions. Word has length 18 [2022-11-16 11:14:01,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:14:01,087 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 208 transitions. [2022-11-16 11:14:01,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:01,088 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 208 transitions. [2022-11-16 11:14:01,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 11:14:01,088 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:14:01,089 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] [2022-11-16 11:14:01,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:14:01,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:14:01,297 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-16 11:14:01,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:14:01,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1866350413, now seen corresponding path program 1 times [2022-11-16 11:14:01,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:14:01,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769637453] [2022-11-16 11:14:01,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:14:01,299 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 [2022-11-16 11:14:01,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:14:01,300 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:14:01,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-16 11:14:01,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:14:01,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:14:01,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:14:01,482 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:14:01,483 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 [2022-11-16 11:14:01,668 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-16 11:14:01,668 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 28 treesize of output 45 [2022-11-16 11:14:01,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:14:01,951 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 11:14:01,952 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 53 [2022-11-16 11:14:02,006 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 51 treesize of output 27 [2022-11-16 11:14:02,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:14:02,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:14:02,095 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:14:02,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769637453] [2022-11-16 11:14:02,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769637453] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:14:02,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:14:02,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:14:02,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339495707] [2022-11-16 11:14:02,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:14:02,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:14:02,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:14:02,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:14:02,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:14:02,097 INFO L87 Difference]: Start difference. First operand 186 states and 208 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:03,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:14:03,550 INFO L93 Difference]: Finished difference Result 205 states and 229 transitions. [2022-11-16 11:14:03,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:14:03,551 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-16 11:14:03,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:14:03,552 INFO L225 Difference]: With dead ends: 205 [2022-11-16 11:14:03,552 INFO L226 Difference]: Without dead ends: 205 [2022-11-16 11:14:03,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:14:03,553 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 318 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:14:03,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 255 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 429 Invalid, 0 Unknown, 91 Unchecked, 1.0s Time] [2022-11-16 11:14:03,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-11-16 11:14:03,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 185. [2022-11-16 11:14:03,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 137 states have (on average 1.510948905109489) internal successors, (207), 184 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:03,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 207 transitions. [2022-11-16 11:14:03,559 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 207 transitions. Word has length 20 [2022-11-16 11:14:03,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:14:03,560 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 207 transitions. [2022-11-16 11:14:03,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:03,560 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 207 transitions. [2022-11-16 11:14:03,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 11:14:03,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:14:03,575 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] [2022-11-16 11:14:03,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-16 11:14:03,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:14:03,776 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-16 11:14:03,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:14:03,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1866350412, now seen corresponding path program 1 times [2022-11-16 11:14:03,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:14:03,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1194337562] [2022-11-16 11:14:03,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:14:03,777 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 [2022-11-16 11:14:03,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:14:03,778 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:14:03,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-16 11:14:03,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:14:03,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:14:03,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:14:03,968 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 [2022-11-16 11:14:04,020 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 [2022-11-16 11:14:04,033 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:14:04,034 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 [2022-11-16 11:14:04,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:14:04,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:14:04,209 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 11:14:04,210 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2022-11-16 11:14:04,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-16 11:14:04,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-16 11:14:04,266 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 31 treesize of output 13 [2022-11-16 11:14:04,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:14:04,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:14:04,296 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:14:04,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1194337562] [2022-11-16 11:14:04,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1194337562] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:14:04,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:14:04,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:14:04,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44668040] [2022-11-16 11:14:04,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:14:04,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:14:04,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:14:04,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:14:04,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:14:04,298 INFO L87 Difference]: Start difference. First operand 185 states and 207 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:05,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:14:05,507 INFO L93 Difference]: Finished difference Result 204 states and 228 transitions. [2022-11-16 11:14:05,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:14:05,508 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-16 11:14:05,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:14:05,509 INFO L225 Difference]: With dead ends: 204 [2022-11-16 11:14:05,509 INFO L226 Difference]: Without dead ends: 204 [2022-11-16 11:14:05,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:14:05,510 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 173 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:14:05,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 194 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 11:14:05,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-11-16 11:14:05,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 184. [2022-11-16 11:14:05,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 137 states have (on average 1.5036496350364963) internal successors, (206), 183 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:05,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 206 transitions. [2022-11-16 11:14:05,515 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 206 transitions. Word has length 20 [2022-11-16 11:14:05,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:14:05,515 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 206 transitions. [2022-11-16 11:14:05,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:05,516 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 206 transitions. [2022-11-16 11:14:05,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-16 11:14:05,516 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:14:05,516 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:14:05,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-16 11:14:05,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:14:05,717 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-16 11:14:05,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:14:05,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1776483090, now seen corresponding path program 1 times [2022-11-16 11:14:05,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:14:05,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1404351295] [2022-11-16 11:14:05,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:14:05,718 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 [2022-11-16 11:14:05,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:14:05,719 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:14:05,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:14:05,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:14:05,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-16 11:14:05,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:14:05,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:14:05,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:14:06,005 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 27 treesize of output 20 [2022-11-16 11:14:06,019 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 27 treesize of output 20 [2022-11-16 11:14:06,088 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:14:06,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 36 treesize of output 23 [2022-11-16 11:14:06,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-16 11:14:06,171 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 15 treesize of output 7 [2022-11-16 11:14:06,177 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 [2022-11-16 11:14:06,273 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:14:06,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:14:06,439 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:14:06,439 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:14:06,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1404351295] [2022-11-16 11:14:06,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1404351295] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:14:06,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:14:06,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2022-11-16 11:14:06,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401797757] [2022-11-16 11:14:06,440 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:14:06,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:14:06,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:14:06,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:14:06,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:14:06,441 INFO L87 Difference]: Start difference. First operand 184 states and 206 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:07,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:14:07,871 INFO L93 Difference]: Finished difference Result 224 states and 249 transitions. [2022-11-16 11:14:07,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 11:14:07,872 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-16 11:14:07,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:14:07,873 INFO L225 Difference]: With dead ends: 224 [2022-11-16 11:14:07,873 INFO L226 Difference]: Without dead ends: 224 [2022-11-16 11:14:07,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:14:07,874 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 72 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:14:07,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 831 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 11:14:07,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-11-16 11:14:07,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 193. [2022-11-16 11:14:07,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 146 states have (on average 1.4726027397260273) internal successors, (215), 192 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:07,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 215 transitions. [2022-11-16 11:14:07,879 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 215 transitions. Word has length 26 [2022-11-16 11:14:07,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:14:07,880 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 215 transitions. [2022-11-16 11:14:07,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:07,880 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 215 transitions. [2022-11-16 11:14:07,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-16 11:14:07,881 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:14:07,881 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:14:07,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:14:08,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:14:08,082 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-16 11:14:08,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:14:08,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1040719994, now seen corresponding path program 1 times [2022-11-16 11:14:08,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:14:08,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1356904643] [2022-11-16 11:14:08,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:14:08,083 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 [2022-11-16 11:14:08,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:14:08,085 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:14:08,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:14:08,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:14:08,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:14:08,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:14:08,307 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 [2022-11-16 11:14:08,453 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:14:08,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 11:14:08,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:14:08,696 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 11:14:08,696 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 37 [2022-11-16 11:14:08,829 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 11:14:08,830 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 37 [2022-11-16 11:14:09,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 15 [2022-11-16 11:14:09,103 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:14:09,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:14:09,252 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_539 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem20#1.base| v_ArrVal_539) |c_ULTIMATE.start_main_~root~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~root~0#1.offset|))) (_ bv1 1)))) is different from false [2022-11-16 11:14:09,298 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_539 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base|) (bvadd |c_ULTIMATE.start_main_~n~0#1.offset| (_ bv4 32))) v_ArrVal_539) |c_ULTIMATE.start_main_~root~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~root~0#1.offset|))) (_ bv1 1)) (_ bv0 1))) is different from false [2022-11-16 11:14:09,333 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_538 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_539 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem19#1.base| v_ArrVal_538))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~n~0#1.base|) (bvadd |c_ULTIMATE.start_main_~n~0#1.offset| (_ bv4 32))) v_ArrVal_539)) |c_ULTIMATE.start_main_~root~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~root~0#1.offset|))) (_ bv1 1)))) is different from false [2022-11-16 11:14:09,353 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_538 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_539 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (select |c_#valid| (select (select (let ((.cse1 (bvadd |c_ULTIMATE.start_main_~n~0#1.offset| (_ bv4 32)))) (let ((.cse0 (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base|) .cse1) v_ArrVal_538))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~n~0#1.base|) .cse1) v_ArrVal_539))) |c_ULTIMATE.start_main_~root~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~root~0#1.offset|))) (_ bv1 1)) (_ bv0 1))) is different from false [2022-11-16 11:14:09,378 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:14:09,379 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 48 treesize of output 39 [2022-11-16 11:14:09,403 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:14:09,404 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 310 treesize of output 267 [2022-11-16 11:14:09,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 252 treesize of output 236 [2022-11-16 11:14:09,453 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:14:09,453 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 236 treesize of output 212 [2022-11-16 11:14:29,554 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:14:29,554 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:14:29,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1356904643] [2022-11-16 11:14:29,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1356904643] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:14:29,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:14:29,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2022-11-16 11:14:29,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466556905] [2022-11-16 11:14:29,555 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:14:29,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 11:14:29,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:14:29,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 11:14:29,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=260, Unknown=9, NotChecked=148, Total=506 [2022-11-16 11:14:29,560 INFO L87 Difference]: Start difference. First operand 193 states and 215 transitions. Second operand has 23 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:35,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:14:37,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:14:43,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:14:43,696 INFO L93 Difference]: Finished difference Result 393 states and 450 transitions. [2022-11-16 11:14:43,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 11:14:43,697 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-16 11:14:43,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:14:43,699 INFO L225 Difference]: With dead ends: 393 [2022-11-16 11:14:43,699 INFO L226 Difference]: Without dead ends: 393 [2022-11-16 11:14:43,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 26.0s TimeCoverageRelationStatistics Valid=208, Invalid=498, Unknown=12, NotChecked=212, Total=930 [2022-11-16 11:14:43,700 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 517 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 66 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 2120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 1364 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:14:43,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 686 Invalid, 2120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 688 Invalid, 2 Unknown, 1364 Unchecked, 7.4s Time] [2022-11-16 11:14:43,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-11-16 11:14:43,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 281. [2022-11-16 11:14:43,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 234 states have (on average 1.4658119658119657) internal successors, (343), 280 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:43,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 343 transitions. [2022-11-16 11:14:43,710 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 343 transitions. Word has length 32 [2022-11-16 11:14:43,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:14:43,711 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 343 transitions. [2022-11-16 11:14:43,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:14:43,719 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 343 transitions. [2022-11-16 11:14:43,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-16 11:14:43,719 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:14:43,720 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:14:43,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:14:43,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:14:43,920 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-16 11:14:43,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:14:43,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1040719993, now seen corresponding path program 1 times [2022-11-16 11:14:43,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:14:43,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [919717384] [2022-11-16 11:14:43,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:14:43,921 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 [2022-11-16 11:14:43,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:14:43,922 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:14:43,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:14:44,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:14:44,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 11:14:44,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:14:44,129 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 [2022-11-16 11:14:44,286 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 [2022-11-16 11:14:44,318 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:14:44,319 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 [2022-11-16 11:14:44,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:14:44,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:14:44,577 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 11:14:44,578 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2022-11-16 11:14:44,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-16 11:14:44,748 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 11:14:44,748 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 45 [2022-11-16 11:14:44,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-16 11:14:44,987 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 [2022-11-16 11:14:44,994 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 13 [2022-11-16 11:14:45,072 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:14:45,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:14:45,699 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~root~0#1.offset|))) (and (forall ((v_ArrVal_582 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_583 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem20#1.base| v_ArrVal_583) |c_ULTIMATE.start_main_~root~0#1.base|) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem20#1.base| v_ArrVal_582) |c_ULTIMATE.start_main_~root~0#1.base|) .cse0)))) (forall ((v_ArrVal_583 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem20#1.base| v_ArrVal_583) |c_ULTIMATE.start_main_~root~0#1.base|) .cse0))) (bvule .cse1 (bvadd (_ bv4 32) .cse1)))))) is different from false [2022-11-16 11:14:45,756 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base|) (bvadd |c_ULTIMATE.start_main_~n~0#1.offset| (_ bv4 32)))) (.cse2 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~root~0#1.offset|))) (and (forall ((v_ArrVal_583 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_583) |c_ULTIMATE.start_main_~root~0#1.base|) .cse2))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((v_ArrVal_582 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_583 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_583) |c_ULTIMATE.start_main_~root~0#1.base|) .cse2)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_582) |c_ULTIMATE.start_main_~root~0#1.base|) .cse2)))))) is different from false [2022-11-16 11:14:45,849 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse2 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~root~0#1.offset|)) (.cse1 (bvadd |c_ULTIMATE.start_main_~n~0#1.offset| (_ bv4 32)))) (and (forall ((v_ArrVal_581 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_583 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_580 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem19#1.base| v_ArrVal_581) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem19#1.base| v_ArrVal_580) |c_ULTIMATE.start_main_~n~0#1.base|) .cse1) v_ArrVal_583) |c_ULTIMATE.start_main_~root~0#1.base|) .cse2))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((v_ArrVal_581 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_582 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_583 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_580 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem19#1.base| v_ArrVal_580))) (let ((.cse3 (select (select .cse4 |c_ULTIMATE.start_main_~n~0#1.base|) .cse1))) (bvule (bvadd (_ bv4 32) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem19#1.base| v_ArrVal_581) .cse3 v_ArrVal_583) |c_ULTIMATE.start_main_~root~0#1.base|) .cse2)) (select |c_#length| (select (select (store .cse4 .cse3 v_ArrVal_582) |c_ULTIMATE.start_main_~root~0#1.base|) .cse2)))))))) is different from false [2022-11-16 11:14:45,948 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse2 (bvadd |c_ULTIMATE.start_main_~n~0#1.offset| (_ bv4 32)))) (let ((.cse3 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~root~0#1.offset|)) (.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base|) .cse2))) (and (forall ((v_ArrVal_581 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_583 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_580 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_581) (select (select (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_580) |c_ULTIMATE.start_main_~n~0#1.base|) .cse2) v_ArrVal_583) |c_ULTIMATE.start_main_~root~0#1.base|) .cse3))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((v_ArrVal_581 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_582 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_583 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_580 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse5 (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_580))) (let ((.cse4 (select (select .cse5 |c_ULTIMATE.start_main_~n~0#1.base|) .cse2))) (bvule (bvadd (_ bv4 32) (select (select (store (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_581) .cse4 v_ArrVal_583) |c_ULTIMATE.start_main_~root~0#1.base|) .cse3)) (select |c_#length| (select (select (store .cse5 .cse4 v_ArrVal_582) |c_ULTIMATE.start_main_~root~0#1.base|) .cse3))))))))) is different from false [2022-11-16 11:14:46,023 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:14:46,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 78 [2022-11-16 11:14:46,041 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:14:46,042 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 67 treesize of output 58 [2022-11-16 11:14:46,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 80 [2022-11-16 11:14:46,119 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:14:46,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 266 treesize of output 235 [2022-11-16 11:14:46,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 220 treesize of output 180 [2022-11-16 11:14:46,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 138 [2022-11-16 11:14:46,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 114 [2022-11-16 11:14:46,438 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:14:46,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 90 [2022-11-16 11:14:46,459 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:14:46,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 60 [2022-11-16 11:14:46,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:14:46,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:14:46,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:14:46,476 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 56 [2022-11-16 11:14:46,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:14:46,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:14:46,489 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 32 [2022-11-16 11:14:46,510 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 11:14:47,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:14:47,022 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:14:47,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [919717384] [2022-11-16 11:14:47,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [919717384] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:14:47,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:14:47,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2022-11-16 11:14:47,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815366584] [2022-11-16 11:14:47,024 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:14:47,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 11:14:47,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:14:47,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 11:14:47,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=290, Unknown=4, NotChecked=148, Total=506 [2022-11-16 11:14:47,026 INFO L87 Difference]: Start difference. First operand 281 states and 343 transitions. Second operand has 23 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:00,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:15:00,812 INFO L93 Difference]: Finished difference Result 473 states and 563 transitions. [2022-11-16 11:15:00,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 11:15:00,814 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-16 11:15:00,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:15:00,816 INFO L225 Difference]: With dead ends: 473 [2022-11-16 11:15:00,817 INFO L226 Difference]: Without dead ends: 473 [2022-11-16 11:15:00,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=230, Invalid=774, Unknown=4, NotChecked=252, Total=1260 [2022-11-16 11:15:00,818 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 684 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 1436 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 2495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 968 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:15:00,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [684 Valid, 847 Invalid, 2495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1436 Invalid, 0 Unknown, 968 Unchecked, 8.9s Time] [2022-11-16 11:15:00,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2022-11-16 11:15:00,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 357. [2022-11-16 11:15:00,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 315 states have (on average 1.4) internal successors, (441), 356 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:00,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 441 transitions. [2022-11-16 11:15:00,830 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 441 transitions. Word has length 32 [2022-11-16 11:15:00,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:15:00,830 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 441 transitions. [2022-11-16 11:15:00,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:00,831 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 441 transitions. [2022-11-16 11:15:00,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-16 11:15:00,831 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:15:00,832 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:15:00,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:15:01,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:15:01,046 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-16 11:15:01,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:01,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1040904692, now seen corresponding path program 1 times [2022-11-16 11:15:01,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:15:01,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1507131257] [2022-11-16 11:15:01,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:01,048 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 [2022-11-16 11:15:01,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:15:01,050 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:15:01,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:15:01,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:01,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 11:15:01,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:15:01,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 11:15:01,353 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 6 treesize of output 5 [2022-11-16 11:15:01,365 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 6 treesize of output 5 [2022-11-16 11:15:02,348 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:15:02,348 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 [2022-11-16 11:15:02,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:15:02,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 11:15:02,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:15:02,530 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 21 treesize of output 20 [2022-11-16 11:15:03,033 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 11:15:03,033 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2022-11-16 11:15:03,050 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 20 treesize of output 22 [2022-11-16 11:15:03,381 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 11:15:03,381 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2022-11-16 11:15:03,398 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 20 treesize of output 22 [2022-11-16 11:15:03,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 11 [2022-11-16 11:15:03,726 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 [2022-11-16 11:15:03,918 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:15:03,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:15:04,236 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_627 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem20#1.base| v_ArrVal_627) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) (_ bv0 32))) (forall ((v_ArrVal_628 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem20#1.base| v_ArrVal_628) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) (_ bv0 32)))) is different from false [2022-11-16 11:15:04,288 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base|) (bvadd |c_ULTIMATE.start_main_~n~0#1.offset| (_ bv4 32))))) (and (forall ((v_ArrVal_628 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_628) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) (_ bv0 32))) (forall ((v_ArrVal_627 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_627) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) (_ bv0 32))))) is different from false [2022-11-16 11:15:04,372 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd |c_ULTIMATE.start_main_~n~0#1.offset| (_ bv4 32)))) (and (forall ((v_ArrVal_626 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_628 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_625 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem19#1.base| v_ArrVal_626) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem19#1.base| v_ArrVal_625) |c_ULTIMATE.start_main_~n~0#1.base|) .cse0) v_ArrVal_628) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) (_ bv0 32))) (forall ((v_ArrVal_627 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_625 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem19#1.base| v_ArrVal_625))) (store .cse1 (select (select .cse1 |c_ULTIMATE.start_main_~n~0#1.base|) .cse0) v_ArrVal_627)) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) (_ bv0 32))))) is different from false [2022-11-16 11:15:04,434 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_ULTIMATE.start_main_~n~0#1.offset| (_ bv4 32)))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base|) .cse1))) (and (forall ((v_ArrVal_626 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_628 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_625 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_626) (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_625) |c_ULTIMATE.start_main_~n~0#1.base|) .cse1) v_ArrVal_628) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) (_ bv0 32))) (forall ((v_ArrVal_627 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_625 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (let ((.cse2 (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_625))) (store .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~n~0#1.base|) .cse1) v_ArrVal_627)) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) (_ bv0 32)))))) is different from false [2022-11-16 11:15:04,557 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_ULTIMATE.start_main_~n~0#1.offset| (_ bv4 32)))) (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base|) .cse1 |c_ULTIMATE.start_main_#t~malloc18#1.base|)))) (and (forall ((v_ArrVal_627 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_625 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (let ((.cse0 (store .cse2 |c_ULTIMATE.start_main_#t~malloc18#1.base| v_ArrVal_625))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~n~0#1.base|) .cse1) v_ArrVal_627)) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) (_ bv0 32))) (forall ((v_ArrVal_622 (_ BitVec 32)) (v_ArrVal_626 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_628 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_625 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~n~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~n~0#1.base|) .cse1 v_ArrVal_622)) |c_ULTIMATE.start_main_#t~malloc18#1.base| v_ArrVal_626) (select (select (store .cse2 |c_ULTIMATE.start_main_#t~malloc18#1.base| v_ArrVal_625) |c_ULTIMATE.start_main_~n~0#1.base|) .cse1) v_ArrVal_628) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) (_ bv0 32)))))) is different from false [2022-11-16 11:15:12,885 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:15:12,885 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 47 [2022-11-16 11:15:12,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 88 [2022-11-16 11:15:12,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 72 [2022-11-16 11:15:12,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-16 11:15:12,974 INFO L321 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2022-11-16 11:15:12,974 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 1 [2022-11-16 11:15:12,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:15:12,992 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:15:12,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1507131257] [2022-11-16 11:15:12,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1507131257] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:15:12,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:15:12,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 27 [2022-11-16 11:15:12,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658350692] [2022-11-16 11:15:12,993 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:15:12,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 11:15:12,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:15:12,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 11:15:12,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=379, Unknown=12, NotChecked=220, Total=702 [2022-11-16 11:15:12,995 INFO L87 Difference]: Start difference. First operand 357 states and 441 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:21,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:15:21,524 INFO L93 Difference]: Finished difference Result 500 states and 608 transitions. [2022-11-16 11:15:21,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:15:21,525 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-16 11:15:21,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:15:21,527 INFO L225 Difference]: With dead ends: 500 [2022-11-16 11:15:21,528 INFO L226 Difference]: Without dead ends: 500 [2022-11-16 11:15:21,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=278, Invalid=852, Unknown=12, NotChecked=340, Total=1482 [2022-11-16 11:15:21,529 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 279 mSDsluCounter, 1132 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 1228 SdHoareTripleChecker+Invalid, 2060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1216 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:15:21,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 1228 Invalid, 2060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 812 Invalid, 0 Unknown, 1216 Unchecked, 4.4s Time] [2022-11-16 11:15:21,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2022-11-16 11:15:21,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 417. [2022-11-16 11:15:21,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 375 states have (on average 1.3866666666666667) internal successors, (520), 416 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:21,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 520 transitions. [2022-11-16 11:15:21,542 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 520 transitions. Word has length 32 [2022-11-16 11:15:21,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:15:21,542 INFO L495 AbstractCegarLoop]: Abstraction has 417 states and 520 transitions. [2022-11-16 11:15:21,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:21,543 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 520 transitions. [2022-11-16 11:15:21,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-16 11:15:21,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:15:21,544 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:15:21,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:15:21,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:15:21,758 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-16 11:15:21,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:21,759 INFO L85 PathProgramCache]: Analyzing trace with hash 892950918, now seen corresponding path program 1 times [2022-11-16 11:15:21,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:15:21,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2108545215] [2022-11-16 11:15:21,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:21,759 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 [2022-11-16 11:15:21,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:15:21,761 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:15:21,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-16 11:15:21,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:21,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 11:15:21,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:15:21,999 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 [2022-11-16 11:15:22,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:15:22,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:15:22,666 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:15:22,667 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 [2022-11-16 11:15:22,843 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 21 treesize of output 20 [2022-11-16 11:15:22,874 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 21 treesize of output 20 [2022-11-16 11:15:23,320 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 11:15:23,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 38 treesize of output 37 [2022-11-16 11:15:23,355 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 20 treesize of output 22 [2022-11-16 11:15:23,678 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 11:15:23,678 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-11-16 11:15:23,707 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 20 treesize of output 22 [2022-11-16 11:15:24,210 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 [2022-11-16 11:15:24,225 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:15:24,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 11 [2022-11-16 11:15:24,450 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:15:24,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:15:25,131 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|)) (.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~root~0#1.offset|))) (and (forall ((v_ArrVal_675 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_675) |c_ULTIMATE.start_main_~root~0#1.base|) .cse1) (_ bv0 32))) (forall ((v_ArrVal_674 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 32) (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_674) |c_ULTIMATE.start_main_~root~0#1.base|) .cse1))))) is different from false [2022-11-16 11:15:25,212 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~root~0#1.offset|))) (and (forall ((v_ArrVal_673 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_674 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_672 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem14#1.base| v_ArrVal_672) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem14#1.base| v_ArrVal_673) |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|) v_ArrVal_674) |c_ULTIMATE.start_main_~root~0#1.base|) .cse0) (_ bv0 32))) (forall ((v_ArrVal_673 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_675 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem14#1.base| v_ArrVal_673))) (store .cse1 (select (select .cse1 |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|) v_ArrVal_675)) |c_ULTIMATE.start_main_~root~0#1.base|) .cse0) (_ bv0 32))))) is different from false [2022-11-16 11:15:25,275 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|)) (.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~root~0#1.offset|))) (and (forall ((v_ArrVal_673 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_674 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_672 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 32) (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_672) (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_673) |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|) v_ArrVal_674) |c_ULTIMATE.start_main_~root~0#1.base|) .cse1))) (forall ((v_ArrVal_673 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_675 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (let ((.cse2 (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_673))) (store .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|) v_ArrVal_675)) |c_ULTIMATE.start_main_~root~0#1.base|) .cse1) (_ bv0 32))))) is different from false [2022-11-16 11:15:25,386 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset| |c_ULTIMATE.start_main_#t~malloc13#1.base|))) (.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~root~0#1.offset|))) (and (forall ((v_ArrVal_673 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_674 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_669 (_ BitVec 32)) (v_ArrVal_672 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~n~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset| v_ArrVal_669)) |c_ULTIMATE.start_main_#t~malloc13#1.base| v_ArrVal_672) (select (select (store .cse0 |c_ULTIMATE.start_main_#t~malloc13#1.base| v_ArrVal_673) |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|) v_ArrVal_674) |c_ULTIMATE.start_main_~root~0#1.base|) .cse1) (_ bv0 32))) (forall ((v_ArrVal_673 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_675 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (let ((.cse2 (store .cse0 |c_ULTIMATE.start_main_#t~malloc13#1.base| v_ArrVal_673))) (store .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|) v_ArrVal_675)) |c_ULTIMATE.start_main_~root~0#1.base|) .cse1) (_ bv0 32))))) is different from false [2022-11-16 11:15:27,265 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:15:27,266 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 2 case distinctions, treesize of input 48 treesize of output 41 [2022-11-16 11:15:27,289 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:15:27,289 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 242 treesize of output 164 [2022-11-16 11:15:27,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 117 [2022-11-16 11:15:27,325 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:15:27,326 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 117 treesize of output 97 [2022-11-16 11:15:27,399 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-11-16 11:15:27,399 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 2 case distinctions, treesize of input 48 treesize of output 1 [2022-11-16 11:15:27,586 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:15:27,586 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:15:27,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2108545215] [2022-11-16 11:15:27,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2108545215] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:15:27,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:15:27,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2022-11-16 11:15:27,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394591694] [2022-11-16 11:15:27,587 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:15:27,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 11:15:27,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:15:27,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 11:15:27,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=269, Unknown=18, NotChecked=148, Total=506 [2022-11-16 11:15:27,589 INFO L87 Difference]: Start difference. First operand 417 states and 520 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:35,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:15:35,387 INFO L93 Difference]: Finished difference Result 707 states and 884 transitions. [2022-11-16 11:15:35,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:15:35,388 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-16 11:15:35,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:15:35,391 INFO L225 Difference]: With dead ends: 707 [2022-11-16 11:15:35,391 INFO L226 Difference]: Without dead ends: 707 [2022-11-16 11:15:35,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 4 IntricatePredicates, 1 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=249, Invalid=678, Unknown=19, NotChecked=244, Total=1190 [2022-11-16 11:15:35,392 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 214 mSDsluCounter, 1147 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 1258 SdHoareTripleChecker+Invalid, 2224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1253 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:15:35,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 1258 Invalid, 2224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 939 Invalid, 0 Unknown, 1253 Unchecked, 5.2s Time] [2022-11-16 11:15:35,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2022-11-16 11:15:35,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 445. [2022-11-16 11:15:35,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 403 states have (on average 1.3771712158808933) internal successors, (555), 444 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:35,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 555 transitions. [2022-11-16 11:15:35,408 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 555 transitions. Word has length 32 [2022-11-16 11:15:35,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:15:35,408 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 555 transitions. [2022-11-16 11:15:35,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:35,409 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 555 transitions. [2022-11-16 11:15:35,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-16 11:15:35,409 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:15:35,410 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 11:15:35,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-16 11:15:35,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:15:35,624 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-16 11:15:35,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:35,625 INFO L85 PathProgramCache]: Analyzing trace with hash -2089686132, now seen corresponding path program 1 times [2022-11-16 11:15:35,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:15:35,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1609324969] [2022-11-16 11:15:35,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:35,626 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 [2022-11-16 11:15:35,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:15:35,627 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:15:35,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-16 11:15:35,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:35,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-16 11:15:35,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:15:35,888 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 [2022-11-16 11:15:35,930 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 6 treesize of output 5 [2022-11-16 11:15:35,941 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 6 treesize of output 5 [2022-11-16 11:15:36,787 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:15:36,787 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 [2022-11-16 11:15:36,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:15:36,953 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 21 treesize of output 20 [2022-11-16 11:15:36,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:15:37,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 11:15:37,476 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 11:15:37,476 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2022-11-16 11:15:37,493 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 20 treesize of output 22 [2022-11-16 11:15:37,807 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 11:15:37,807 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2022-11-16 11:15:37,838 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 20 treesize of output 22 [2022-11-16 11:15:38,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 11 [2022-11-16 11:15:38,199 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 [2022-11-16 11:15:38,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:15:38,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:15:39,952 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_ULTIMATE.start_main_~n~0#1.offset| (_ bv4 32)))) (and (forall ((v_ArrVal_732 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_733 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem19#1.base| v_ArrVal_732))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~n~0#1.base|) .cse1) v_ArrVal_733)) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) (_ bv0 32))) (forall ((v_ArrVal_731 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_732 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_734 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem19#1.base| v_ArrVal_731) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem19#1.base| v_ArrVal_732) |c_ULTIMATE.start_main_~n~0#1.base|) .cse1) v_ArrVal_734) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) (_ bv0 32))))) is different from false [2022-11-16 11:15:40,007 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_ULTIMATE.start_main_~n~0#1.offset| (_ bv4 32)))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base|) .cse1))) (and (forall ((v_ArrVal_731 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_732 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_734 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_731) (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_732) |c_ULTIMATE.start_main_~n~0#1.base|) .cse1) v_ArrVal_734) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) (_ bv0 32))) (forall ((v_ArrVal_732 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_733 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (let ((.cse2 (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_732))) (store .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~n~0#1.base|) .cse1) v_ArrVal_733)) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) (_ bv0 32)))))) is different from false [2022-11-16 11:15:40,158 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_ULTIMATE.start_main_~n~0#1.offset| (_ bv4 32)))) (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base|) .cse1 |c_ULTIMATE.start_main_#t~malloc18#1.base|)))) (and (forall ((v_ArrVal_732 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_733 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (let ((.cse0 (store .cse2 |c_ULTIMATE.start_main_#t~malloc18#1.base| v_ArrVal_732))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~n~0#1.base|) .cse1) v_ArrVal_733)) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) (_ bv0 32))) (forall ((v_ArrVal_731 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_730 (_ BitVec 32)) (v_ArrVal_732 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_734 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 32) (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~n~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~n~0#1.base|) .cse1 v_ArrVal_730)) |c_ULTIMATE.start_main_#t~malloc18#1.base| v_ArrVal_731) (select (select (store .cse2 |c_ULTIMATE.start_main_#t~malloc18#1.base| v_ArrVal_732) |c_ULTIMATE.start_main_~n~0#1.base|) .cse1) v_ArrVal_734) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|)))))) is different from false [2022-11-16 11:15:52,189 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:15:52,189 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 47 [2022-11-16 11:15:52,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 230 treesize of output 164 [2022-11-16 11:15:52,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 105 [2022-11-16 11:15:52,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 97 [2022-11-16 11:15:52,311 INFO L321 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2022-11-16 11:15:52,311 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 1 [2022-11-16 11:15:52,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:15:52,332 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:15:52,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1609324969] [2022-11-16 11:15:52,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1609324969] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:15:52,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:15:52,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2022-11-16 11:15:52,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120055735] [2022-11-16 11:15:52,333 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:15:52,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 11:15:52,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:15:52,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 11:15:52,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=488, Unknown=28, NotChecked=144, Total=756 [2022-11-16 11:15:52,334 INFO L87 Difference]: Start difference. First operand 445 states and 555 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:55,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:15:55,099 INFO L93 Difference]: Finished difference Result 493 states and 605 transitions. [2022-11-16 11:15:55,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 11:15:55,100 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-16 11:15:55,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:15:55,102 INFO L225 Difference]: With dead ends: 493 [2022-11-16 11:15:55,102 INFO L226 Difference]: Without dead ends: 493 [2022-11-16 11:15:55,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=174, Invalid=866, Unknown=28, NotChecked=192, Total=1260 [2022-11-16 11:15:55,104 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 72 mSDsluCounter, 977 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 752 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:15:55,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 1094 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 164 Invalid, 0 Unknown, 752 Unchecked, 0.9s Time] [2022-11-16 11:15:55,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-11-16 11:15:55,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 455. [2022-11-16 11:15:55,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 413 states have (on average 1.3704600484261502) internal successors, (566), 454 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:55,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 566 transitions. [2022-11-16 11:15:55,116 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 566 transitions. Word has length 34 [2022-11-16 11:15:55,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:15:55,116 INFO L495 AbstractCegarLoop]: Abstraction has 455 states and 566 transitions. [2022-11-16 11:15:55,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:55,117 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 566 transitions. [2022-11-16 11:15:55,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-16 11:15:55,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:15:55,118 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 11:15:55,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-16 11:15:55,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:15:55,333 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-16 11:15:55,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:55,334 INFO L85 PathProgramCache]: Analyzing trace with hash 742188428, now seen corresponding path program 1 times [2022-11-16 11:15:55,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:15:55,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1265442532] [2022-11-16 11:15:55,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:55,334 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 [2022-11-16 11:15:55,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:15:55,337 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:15:55,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:15:55,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:55,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-16 11:15:55,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:15:55,626 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 [2022-11-16 11:15:55,956 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:15:55,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 11:15:56,110 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 [2022-11-16 11:15:56,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 11:15:56,618 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 11:15:56,619 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2022-11-16 11:15:56,641 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 18 treesize of output 20 [2022-11-16 11:15:56,916 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 11:15:56,917 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2022-11-16 11:15:56,928 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 18 treesize of output 20 [2022-11-16 11:15:57,343 INFO L321 Elim1Store]: treesize reduction 32, result has 49.2 percent of original size [2022-11-16 11:15:57,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 48 [2022-11-16 11:15:57,632 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 35 treesize of output 19 [2022-11-16 11:15:57,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:15:58,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:15:58,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:16:00,241 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_791 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_main_~#sentinel~0#1.base_16| (_ BitVec 32)) (v_ArrVal_793 (_ BitVec 1))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem15#1.base| v_ArrVal_791) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|))) (or (= (_ bv0 1) (bvadd (select (store |c_#valid| |v_ULTIMATE.start_main_~#sentinel~0#1.base_16| v_ArrVal_793) .cse0) (_ bv1 1))) (= .cse0 |v_ULTIMATE.start_main_~#sentinel~0#1.base_16|)))) (forall ((v_ArrVal_792 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem15#1.base| v_ArrVal_792) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) (_ bv0 32)))) is different from false [2022-11-16 11:16:00,304 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|))) (and (forall ((v_ArrVal_792 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_792) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) (_ bv0 32))) (forall ((v_ArrVal_791 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_main_~#sentinel~0#1.base_16| (_ BitVec 32)) (v_ArrVal_793 (_ BitVec 1))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_791) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|))) (or (= (_ bv0 1) (bvadd (select (store |c_#valid| |v_ULTIMATE.start_main_~#sentinel~0#1.base_16| v_ArrVal_793) .cse1) (_ bv1 1))) (= .cse1 |v_ULTIMATE.start_main_~#sentinel~0#1.base_16|)))))) is different from false [2022-11-16 11:16:00,401 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_790 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_792 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_789 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem14#1.base| v_ArrVal_790) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem14#1.base| v_ArrVal_789) |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|) v_ArrVal_792) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) (_ bv0 32))) (forall ((v_ArrVal_791 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_main_~#sentinel~0#1.base_16| (_ BitVec 32)) (v_ArrVal_793 (_ BitVec 1)) (v_ArrVal_789 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem14#1.base| v_ArrVal_789))) (store .cse1 (select (select .cse1 |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|) v_ArrVal_791)) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|))) (or (= .cse0 |v_ULTIMATE.start_main_~#sentinel~0#1.base_16|) (= (_ bv0 1) (bvadd (select (store |c_#valid| |v_ULTIMATE.start_main_~#sentinel~0#1.base_16| v_ArrVal_793) .cse0) (_ bv1 1))))))) is different from false [2022-11-16 11:16:00,464 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|))) (and (forall ((v_ArrVal_791 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_main_~#sentinel~0#1.base_16| (_ BitVec 32)) (v_ArrVal_793 (_ BitVec 1)) (v_ArrVal_789 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| .cse2 v_ArrVal_789))) (store .cse1 (select (select .cse1 |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|) v_ArrVal_791)) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|))) (or (= (_ bv0 1) (bvadd (select (store |c_#valid| |v_ULTIMATE.start_main_~#sentinel~0#1.base_16| v_ArrVal_793) .cse0) (_ bv1 1))) (= .cse0 |v_ULTIMATE.start_main_~#sentinel~0#1.base_16|)))) (forall ((v_ArrVal_790 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_792 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_789 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store (store |c_#memory_$Pointer$.offset| .cse2 v_ArrVal_790) (select (select (store |c_#memory_$Pointer$.base| .cse2 v_ArrVal_789) |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|) v_ArrVal_792) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) (_ bv0 32))))) is different from false [2022-11-16 11:16:00,535 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:16:00,536 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 36 treesize of output 37 [2022-11-16 11:16:00,557 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:16:00,557 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 28 treesize of output 29 [2022-11-16 11:16:00,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2022-11-16 11:16:00,627 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:16:00,628 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 166 treesize of output 161 [2022-11-16 11:16:00,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 136 [2022-11-16 11:16:00,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 110 [2022-11-16 11:16:00,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 98 [2022-11-16 11:16:00,906 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:16:00,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 56 [2022-11-16 11:16:00,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:16:00,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:16:00,924 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 53 [2022-11-16 11:16:00,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-11-16 11:16:02,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:16:02,080 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:16:02,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1265442532] [2022-11-16 11:16:02,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1265442532] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:16:02,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:16:02,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2022-11-16 11:16:02,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513945763] [2022-11-16 11:16:02,080 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:16:02,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-16 11:16:02,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:16:02,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-16 11:16:02,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=345, Unknown=4, NotChecked=164, Total=600 [2022-11-16 11:16:02,082 INFO L87 Difference]: Start difference. First operand 455 states and 566 transitions. Second operand has 25 states, 24 states have (on average 2.625) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:09,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:16:09,201 INFO L93 Difference]: Finished difference Result 909 states and 1144 transitions. [2022-11-16 11:16:09,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:16:09,202 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.625) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-16 11:16:09,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:16:09,205 INFO L225 Difference]: With dead ends: 909 [2022-11-16 11:16:09,206 INFO L226 Difference]: Without dead ends: 909 [2022-11-16 11:16:09,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 4 IntricatePredicates, 1 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=227, Invalid=777, Unknown=4, NotChecked=252, Total=1260 [2022-11-16 11:16:09,207 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 499 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 1777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1032 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:16:09,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [499 Valid, 619 Invalid, 1777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 687 Invalid, 0 Unknown, 1032 Unchecked, 4.0s Time] [2022-11-16 11:16:09,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-11-16 11:16:09,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 752. [2022-11-16 11:16:09,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 710 states have (on average 1.380281690140845) internal successors, (980), 751 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:09,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 980 transitions. [2022-11-16 11:16:09,228 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 980 transitions. Word has length 34 [2022-11-16 11:16:09,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:16:09,228 INFO L495 AbstractCegarLoop]: Abstraction has 752 states and 980 transitions. [2022-11-16 11:16:09,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.625) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:09,229 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 980 transitions. [2022-11-16 11:16:09,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-16 11:16:09,229 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:09,230 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 11:16:09,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:16:09,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:09,445 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-16 11:16:09,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:09,446 INFO L85 PathProgramCache]: Analyzing trace with hash 742188429, now seen corresponding path program 1 times [2022-11-16 11:16:09,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:16:09,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1197286533] [2022-11-16 11:16:09,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:09,446 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 [2022-11-16 11:16:09,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:16:09,447 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:16:09,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 11:16:09,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:16:09,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-16 11:16:09,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:09,680 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 [2022-11-16 11:16:09,953 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:16:09,954 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 [2022-11-16 11:16:09,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:16:10,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 11:16:10,138 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 [2022-11-16 11:16:10,510 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 11:16:10,510 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-11-16 11:16:10,541 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 18 treesize of output 20 [2022-11-16 11:16:10,806 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 11:16:10,807 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-11-16 11:16:10,836 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 18 treesize of output 20 [2022-11-16 11:16:11,159 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 11:16:11,160 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 1 case distinctions, treesize of input 16 treesize of output 26 [2022-11-16 11:16:11,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2022-11-16 11:16:11,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:16:12,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:16:12,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:16:14,995 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_850 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem15#1.base| v_ArrVal_850) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) (_ bv0 32))) (forall ((|v_ULTIMATE.start_main_~#sentinel~0#1.base_18| (_ BitVec 32)) (v_ArrVal_850 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_851 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem15#1.base| v_ArrVal_851) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|))) (or (forall ((v_ArrVal_852 (_ BitVec 32))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem15#1.base| v_ArrVal_850) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|)) (select (store |c_#length| |v_ULTIMATE.start_main_~#sentinel~0#1.base_18| v_ArrVal_852) .cse0))) (= .cse0 |v_ULTIMATE.start_main_~#sentinel~0#1.base_18|))))) is different from false [2022-11-16 11:16:15,061 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|))) (and (forall ((|v_ULTIMATE.start_main_~#sentinel~0#1.base_18| (_ BitVec 32)) (v_ArrVal_850 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_851 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_851) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|))) (or (= .cse0 |v_ULTIMATE.start_main_~#sentinel~0#1.base_18|) (forall ((v_ArrVal_852 (_ BitVec 32))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_850) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|)) (select (store |c_#length| |v_ULTIMATE.start_main_~#sentinel~0#1.base_18| v_ArrVal_852) .cse0)))))) (forall ((v_ArrVal_850 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_850) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) (_ bv0 32))))) is different from false [2022-11-16 11:16:15,207 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~#sentinel~0#1.base_18| (_ BitVec 32)) (v_ArrVal_850 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_851 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_848 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_849 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem14#1.base| v_ArrVal_849))) (let ((.cse0 (select (select .cse2 |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|))) (let ((.cse1 (select (select (store .cse2 .cse0 v_ArrVal_851) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|))) (or (forall ((v_ArrVal_852 (_ BitVec 32))) (bvule (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem14#1.base| v_ArrVal_848) .cse0 v_ArrVal_850) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) (_ bv4 32)) (select (store |c_#length| |v_ULTIMATE.start_main_~#sentinel~0#1.base_18| v_ArrVal_852) .cse1))) (= .cse1 |v_ULTIMATE.start_main_~#sentinel~0#1.base_18|)))))) (forall ((v_ArrVal_850 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_848 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_849 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem14#1.base| v_ArrVal_848) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem14#1.base| v_ArrVal_849) |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|) v_ArrVal_850) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) (_ bv0 32)))) is different from false [2022-11-16 11:16:15,285 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|))) (and (forall ((|v_ULTIMATE.start_main_~#sentinel~0#1.base_18| (_ BitVec 32)) (v_ArrVal_850 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_851 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_848 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_849 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_849))) (let ((.cse2 (select (select .cse3 |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|))) (let ((.cse0 (select (select (store .cse3 .cse2 v_ArrVal_851) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|))) (or (= .cse0 |v_ULTIMATE.start_main_~#sentinel~0#1.base_18|) (forall ((v_ArrVal_852 (_ BitVec 32))) (bvule (bvadd (_ bv4 32) (select (select (store (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_848) .cse2 v_ArrVal_850) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|)) (select (store |c_#length| |v_ULTIMATE.start_main_~#sentinel~0#1.base_18| v_ArrVal_852) .cse0)))))))) (forall ((v_ArrVal_850 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_848 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_849 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_848) (select (select (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_849) |c_ULTIMATE.start_main_~n~0#1.base|) |c_ULTIMATE.start_main_~n~0#1.offset|) v_ArrVal_850) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|) (_ bv0 32))))) is different from false [2022-11-16 11:16:15,366 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:16:15,366 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 36 treesize of output 37 [2022-11-16 11:16:15,387 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:16:15,388 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 28 treesize of output 29 [2022-11-16 11:16:15,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2022-11-16 11:16:15,446 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:16:15,447 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 100 treesize of output 99 [2022-11-16 11:16:15,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 52 [2022-11-16 11:16:15,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 70 [2022-11-16 11:16:15,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 46 [2022-11-16 11:16:15,691 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:16:15,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 77 [2022-11-16 11:16:15,719 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:16:15,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 73 [2022-11-16 11:16:15,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:16:15,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:16:15,735 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 73 [2022-11-16 11:16:15,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:16:15,752 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2022-11-16 11:16:15,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-11-16 11:16:19,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:16:19,046 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:16:19,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1197286533] [2022-11-16 11:16:19,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1197286533] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:16:19,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:16:19,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2022-11-16 11:16:19,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45951536] [2022-11-16 11:16:19,046 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:16:19,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 11:16:19,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:16:19,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 11:16:19,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=403, Unknown=5, NotChecked=172, Total=650 [2022-11-16 11:16:19,048 INFO L87 Difference]: Start difference. First operand 752 states and 980 transitions. Second operand has 26 states, 25 states have (on average 2.56) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:42,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:16:42,550 INFO L93 Difference]: Finished difference Result 1032 states and 1315 transitions. [2022-11-16 11:16:42,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-16 11:16:42,552 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.56) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-16 11:16:42,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:16:42,556 INFO L225 Difference]: With dead ends: 1032 [2022-11-16 11:16:42,556 INFO L226 Difference]: Without dead ends: 1032 [2022-11-16 11:16:42,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 4 IntricatePredicates, 2 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=323, Invalid=1492, Unknown=7, NotChecked=340, Total=2162 [2022-11-16 11:16:42,558 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 378 mSDsluCounter, 1019 mSDsCounter, 0 mSdLazyCounter, 1660 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 1105 SdHoareTripleChecker+Invalid, 2891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1188 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:16:42,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 1105 Invalid, 2891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1660 Invalid, 0 Unknown, 1188 Unchecked, 11.7s Time] [2022-11-16 11:16:42,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2022-11-16 11:16:42,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 833. [2022-11-16 11:16:42,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 791 states have (on average 1.3742098609355247) internal successors, (1087), 832 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:42,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1087 transitions. [2022-11-16 11:16:42,578 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1087 transitions. Word has length 34 [2022-11-16 11:16:42,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:16:42,579 INFO L495 AbstractCegarLoop]: Abstraction has 833 states and 1087 transitions. [2022-11-16 11:16:42,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.56) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:42,579 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1087 transitions. [2022-11-16 11:16:42,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-16 11:16:42,580 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:42,580 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, 1, 1, 1, 1] [2022-11-16 11:16:42,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-16 11:16:42,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:42,795 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-16 11:16:42,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:42,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1533003794, now seen corresponding path program 1 times [2022-11-16 11:16:42,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:16:42,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1533908768] [2022-11-16 11:16:42,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:42,796 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 [2022-11-16 11:16:42,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:16:42,797 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:16:42,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-16 11:16:42,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:16:42,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:16:42,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:43,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:16:43,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:16:43,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:16:43,900 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:16:43,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1533908768] [2022-11-16 11:16:43,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1533908768] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:16:43,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:16:43,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2022-11-16 11:16:43,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103712643] [2022-11-16 11:16:43,901 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:16:43,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:16:43,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:16:43,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:16:43,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:16:43,903 INFO L87 Difference]: Start difference. First operand 833 states and 1087 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:44,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:16:44,948 INFO L93 Difference]: Finished difference Result 897 states and 1167 transitions. [2022-11-16 11:16:44,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:16:44,949 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-16 11:16:44,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:16:44,951 INFO L225 Difference]: With dead ends: 897 [2022-11-16 11:16:44,951 INFO L226 Difference]: Without dead ends: 897 [2022-11-16 11:16:44,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:16:44,951 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 234 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:16:44,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 293 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 11:16:44,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2022-11-16 11:16:44,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 836. [2022-11-16 11:16:44,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 794 states have (on average 1.3753148614609572) internal successors, (1092), 835 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:44,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1092 transitions. [2022-11-16 11:16:44,968 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1092 transitions. Word has length 35 [2022-11-16 11:16:44,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:16:44,968 INFO L495 AbstractCegarLoop]: Abstraction has 836 states and 1092 transitions. [2022-11-16 11:16:44,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:44,969 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1092 transitions. [2022-11-16 11:16:44,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-16 11:16:44,970 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:44,970 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:44,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-16 11:16:45,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:45,184 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-16 11:16:45,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:45,185 INFO L85 PathProgramCache]: Analyzing trace with hash -396121760, now seen corresponding path program 2 times [2022-11-16 11:16:45,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:16:45,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [507174399] [2022-11-16 11:16:45,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:16:45,185 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 [2022-11-16 11:16:45,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:16:45,186 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:16:45,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-16 11:16:45,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:16:45,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:16:45,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 11:16:45,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:45,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 11:16:45,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:16:45,728 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 31 treesize of output 24 [2022-11-16 11:16:45,871 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:16:45,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 40 treesize of output 27 [2022-11-16 11:16:46,037 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 [2022-11-16 11:16:46,330 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:16:46,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:16:46,680 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:16:46,680 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:16:46,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [507174399] [2022-11-16 11:16:46,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [507174399] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:16:46,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:16:46,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2022-11-16 11:16:46,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419788478] [2022-11-16 11:16:46,681 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:16:46,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 11:16:46,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:16:46,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 11:16:46,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:16:46,682 INFO L87 Difference]: Start difference. First operand 836 states and 1092 transitions. Second operand has 13 states, 12 states have (on average 3.25) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:54,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:16:54,544 INFO L93 Difference]: Finished difference Result 979 states and 1249 transitions. [2022-11-16 11:16:54,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 11:16:54,545 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.25) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-16 11:16:54,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:16:54,550 INFO L225 Difference]: With dead ends: 979 [2022-11-16 11:16:54,550 INFO L226 Difference]: Without dead ends: 979 [2022-11-16 11:16:54,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2022-11-16 11:16:54,551 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 245 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 1289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:16:54,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 675 Invalid, 1289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1267 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-11-16 11:16:54,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2022-11-16 11:16:54,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 881. [2022-11-16 11:16:54,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 839 states have (on average 1.369487485101311) internal successors, (1149), 880 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:54,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 1149 transitions. [2022-11-16 11:16:54,571 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 1149 transitions. Word has length 35 [2022-11-16 11:16:54,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:16:54,571 INFO L495 AbstractCegarLoop]: Abstraction has 881 states and 1149 transitions. [2022-11-16 11:16:54,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.25) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:54,572 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 1149 transitions. [2022-11-16 11:16:54,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-16 11:16:54,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:54,573 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:54,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-11-16 11:16:54,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:16:54,788 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-16 11:16:54,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:54,789 INFO L85 PathProgramCache]: Analyzing trace with hash -396121759, now seen corresponding path program 1 times [2022-11-16 11:16:54,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:16:54,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1869743695] [2022-11-16 11:16:54,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:54,790 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 [2022-11-16 11:16:54,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:16:54,791 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:16:54,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-16 11:16:55,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:16:55,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-16 11:16:55,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:55,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:16:55,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:16:55,817 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 27 treesize of output 20 [2022-11-16 11:16:55,852 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 27 treesize of output 20 [2022-11-16 11:16:56,065 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:16:56,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 36 treesize of output 23 [2022-11-16 11:16:56,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 23 [2022-11-16 11:16:56,384 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 [2022-11-16 11:16:56,393 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 [2022-11-16 11:16:56,938 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:16:56,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:16:58,717 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:16:58,717 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:16:58,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1869743695] [2022-11-16 11:16:58,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1869743695] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:16:58,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:16:58,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2022-11-16 11:16:58,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708558954] [2022-11-16 11:16:58,718 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:16:58,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 11:16:58,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:16:58,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 11:16:58,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:16:58,719 INFO L87 Difference]: Start difference. First operand 881 states and 1149 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:07,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:17:07,633 INFO L93 Difference]: Finished difference Result 964 states and 1237 transitions. [2022-11-16 11:17:07,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 11:17:07,635 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-16 11:17:07,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:17:07,637 INFO L225 Difference]: With dead ends: 964 [2022-11-16 11:17:07,637 INFO L226 Difference]: Without dead ends: 964 [2022-11-16 11:17:07,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2022-11-16 11:17:07,639 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 181 mSDsluCounter, 1960 mSDsCounter, 0 mSdLazyCounter, 1326 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 2152 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:17:07,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 2152 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1326 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2022-11-16 11:17:07,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2022-11-16 11:17:07,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 882. [2022-11-16 11:17:07,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 840 states have (on average 1.369047619047619) internal successors, (1150), 881 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:07,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1150 transitions. [2022-11-16 11:17:07,660 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1150 transitions. Word has length 35 [2022-11-16 11:17:07,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:17:07,661 INFO L495 AbstractCegarLoop]: Abstraction has 882 states and 1150 transitions. [2022-11-16 11:17:07,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:07,661 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1150 transitions. [2022-11-16 11:17:07,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-16 11:17:07,662 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:17:07,662 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, 1, 1, 1, 1, 1] [2022-11-16 11:17:07,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-16 11:17:07,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:17:07,878 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-16 11:17:07,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:17:07,878 INFO L85 PathProgramCache]: Analyzing trace with hash 278482478, now seen corresponding path program 1 times [2022-11-16 11:17:07,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:17:07,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [762620226] [2022-11-16 11:17:07,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:17:07,879 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 [2022-11-16 11:17:07,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:17:07,880 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:17:07,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-16 11:17:08,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:17:08,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:17:08,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:17:08,078 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 [2022-11-16 11:17:08,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:17:08,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:17:08,103 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:17:08,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [762620226] [2022-11-16 11:17:08,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [762620226] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:17:08,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:17:08,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:17:08,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834384481] [2022-11-16 11:17:08,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:17:08,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:17:08,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:17:08,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:17:08,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:17:08,106 INFO L87 Difference]: Start difference. First operand 882 states and 1150 transitions. Second operand has 3 states, 2 states have (on average 18.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:08,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:17:08,589 INFO L93 Difference]: Finished difference Result 884 states and 1153 transitions. [2022-11-16 11:17:08,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:17:08,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 18.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2022-11-16 11:17:08,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:17:08,592 INFO L225 Difference]: With dead ends: 884 [2022-11-16 11:17:08,592 INFO L226 Difference]: Without dead ends: 884 [2022-11-16 11:17:08,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:17:08,593 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 8 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:17:08,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 178 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:17:08,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-11-16 11:17:08,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 882. [2022-11-16 11:17:08,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 842 states have (on average 1.368171021377672) internal successors, (1152), 881 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:08,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1152 transitions. [2022-11-16 11:17:08,610 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1152 transitions. Word has length 36 [2022-11-16 11:17:08,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:17:08,610 INFO L495 AbstractCegarLoop]: Abstraction has 882 states and 1152 transitions. [2022-11-16 11:17:08,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 18.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:08,611 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1152 transitions. [2022-11-16 11:17:08,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-16 11:17:08,612 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:17:08,612 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, 1, 1, 1, 1, 1] [2022-11-16 11:17:08,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-16 11:17:08,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:17:08,827 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-16 11:17:08,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:17:08,827 INFO L85 PathProgramCache]: Analyzing trace with hash 278482479, now seen corresponding path program 1 times [2022-11-16 11:17:08,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:17:08,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [710327271] [2022-11-16 11:17:08,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:17:08,828 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:17:08,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:17:08,829 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:17:08,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-16 11:17:09,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:17:09,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:17:09,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:17:09,048 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 [2022-11-16 11:17:09,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:17:09,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:17:09,102 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:17:09,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [710327271] [2022-11-16 11:17:09,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [710327271] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:17:09,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:17:09,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:17:09,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312526224] [2022-11-16 11:17:09,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:17:09,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:17:09,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:17:09,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:17:09,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:17:09,104 INFO L87 Difference]: Start difference. First operand 882 states and 1152 transitions. Second operand has 3 states, 2 states have (on average 18.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:09,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:17:09,722 INFO L93 Difference]: Finished difference Result 884 states and 1152 transitions. [2022-11-16 11:17:09,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:17:09,723 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 18.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2022-11-16 11:17:09,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:17:09,726 INFO L225 Difference]: With dead ends: 884 [2022-11-16 11:17:09,726 INFO L226 Difference]: Without dead ends: 884 [2022-11-16 11:17:09,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:17:09,728 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 7 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:17:09,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 173 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 11:17:09,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-11-16 11:17:09,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 880. [2022-11-16 11:17:09,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 842 states have (on average 1.3646080760095012) internal successors, (1149), 879 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:09,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1149 transitions. [2022-11-16 11:17:09,745 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1149 transitions. Word has length 36 [2022-11-16 11:17:09,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:17:09,746 INFO L495 AbstractCegarLoop]: Abstraction has 880 states and 1149 transitions. [2022-11-16 11:17:09,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 18.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:09,746 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1149 transitions. [2022-11-16 11:17:09,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-16 11:17:09,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:17:09,747 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:17:09,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-16 11:17:09,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:17:09,963 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 74 more)] === [2022-11-16 11:17:09,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:17:09,963 INFO L85 PathProgramCache]: Analyzing trace with hash 99445590, now seen corresponding path program 1 times [2022-11-16 11:17:09,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:17:09,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [98118500] [2022-11-16 11:17:09,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:17:09,964 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 [2022-11-16 11:17:09,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:17:09,965 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:17:10,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2c58355-9cb2-46db-b864-08183ad827b8/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-16 11:17:10,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:17:10,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 11:17:10,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:17:10,347 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 [2022-11-16 11:17:10,752 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:17:10,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 11:17:10,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 11:17:11,358 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 11:17:11,358 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2022-11-16 11:17:11,680 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 11:17:11,680 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2022-11-16 11:17:12,067 INFO L321 Elim1Store]: treesize reduction 56, result has 35.6 percent of original size [2022-11-16 11:17:12,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 51 [2022-11-16 11:17:12,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:17:12,306 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 41 treesize of output 32 [2022-11-16 11:17:13,015 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 11:17:13,015 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 51 [2022-11-16 11:17:13,502 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 11:17:13,502 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 51 [2022-11-16 11:17:14,331 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:17:14,331 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 51 treesize of output 23 [2022-11-16 11:17:14,603 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:17:14,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:17:19,595 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1189 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1190 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem19#1.base| v_ArrVal_1189))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~n~0#1.base|) (bvadd |c_ULTIMATE.start_main_~n~0#1.offset| (_ bv4 32))) v_ArrVal_1190)) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|)) (_ bv1 1)))) is different from false [2022-11-16 11:17:19,638 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1189 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1190 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (let ((.cse1 (bvadd |c_ULTIMATE.start_main_~n~0#1.offset| (_ bv4 32)))) (let ((.cse0 (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base|) .cse1) v_ArrVal_1189))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~n~0#1.base|) .cse1) v_ArrVal_1190))) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|)) (_ bv1 1)))) is different from false [2022-11-16 11:17:19,707 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1189 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1190 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (select |c_#valid| (select (select (let ((.cse1 (bvadd |c_ULTIMATE.start_main_~n~0#1.offset| (_ bv4 32)))) (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base|) .cse1 |c_ULTIMATE.start_main_#t~malloc18#1.base|)) |c_ULTIMATE.start_main_#t~malloc18#1.base| v_ArrVal_1189))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~n~0#1.base|) .cse1) v_ArrVal_1190))) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|)) (_ bv1 1)) (_ bv0 1))) is different from false [2022-11-16 11:17:19,761 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1189 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_main_#t~malloc18#1.base_22| (_ BitVec 32)) (v_ArrVal_1186 (_ BitVec 1)) (v_ArrVal_1190 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (_ bv0 1) (bvadd (select (store |c_#valid| |v_ULTIMATE.start_main_#t~malloc18#1.base_22| v_ArrVal_1186) (select (select (let ((.cse1 (bvadd |c_ULTIMATE.start_main_~n~0#1.offset| (_ bv4 32)))) (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~n~0#1.base|) .cse1 |v_ULTIMATE.start_main_#t~malloc18#1.base_22|)) |v_ULTIMATE.start_main_#t~malloc18#1.base_22| v_ArrVal_1189))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~n~0#1.base|) .cse1) v_ArrVal_1190))) |c_ULTIMATE.start_main_~root~0#1.base|) |c_ULTIMATE.start_main_~root~0#1.offset|)) (_ bv1 1))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc18#1.base_22|))))) is different from false [2022-11-16 11:17:22,023 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:17:22,024 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 165 treesize of output 110 [2022-11-16 11:17:22,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:17:22,281 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:17:22,284 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 195062 treesize of output 193492 [2022-11-16 11:17:23,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193478 treesize of output 186310 [2022-11-16 11:17:24,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186310 treesize of output 182726 [2022-11-16 11:17:25,605 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:17:25,608 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 188102 treesize of output 186306 [2022-11-16 11:17:26,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 189882 treesize of output 188474