./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/bubblesort-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 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_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/bubblesort-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a --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 71daa4447a811360729951159d42c752715aafb50c3ad4dcb2ed5d242a4f4a78 --- 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-b5237d8 [2022-11-21 16:45:25,920 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:45:25,923 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:45:25,962 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:45:25,962 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:45:25,966 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:45:25,969 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:45:25,972 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:45:25,974 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:45:25,981 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:45:25,983 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:45:25,985 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:45:25,985 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:45:25,988 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:45:25,992 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:45:25,993 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:45:25,995 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:45:25,996 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:45:25,998 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:45:26,004 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:45:26,006 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:45:26,008 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:45:26,010 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:45:26,011 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:45:26,021 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:45:26,022 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:45:26,022 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:45:26,025 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:45:26,026 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:45:26,027 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:45:26,027 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:45:26,028 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:45:26,030 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:45:26,031 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:45:26,032 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:45:26,033 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:45:26,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:45:26,034 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:45:26,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:45:26,036 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:45:26,037 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:45:26,038 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-21 16:45:26,087 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:45:26,089 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:45:26,089 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:45:26,090 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:45:26,091 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:45:26,092 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:45:26,093 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:45:26,093 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:45:26,093 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:45:26,093 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:45:26,095 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:45:26,095 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-21 16:45:26,095 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:45:26,095 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:45:26,096 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:45:26,096 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-21 16:45:26,096 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-21 16:45:26,096 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-21 16:45:26,097 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:45:26,097 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-21 16:45:26,097 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:45:26,101 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:45:26,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:45:26,102 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:45:26,102 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:45:26,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:45:26,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:45:26,103 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:45:26,103 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:45:26,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:45:26,104 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_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71daa4447a811360729951159d42c752715aafb50c3ad4dcb2ed5d242a4f4a78 [2022-11-21 16:45:26,353 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:45:26,388 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:45:26,391 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:45:26,393 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:45:26,393 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:45:26,395 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/array-memsafety/bubblesort-alloca-2.i [2022-11-21 16:45:29,380 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:45:29,656 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:45:29,657 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/sv-benchmarks/c/array-memsafety/bubblesort-alloca-2.i [2022-11-21 16:45:29,670 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/data/76fd5fb1a/bc1fc74613314f4d829f213dc11b5bff/FLAG936cc9252 [2022-11-21 16:45:29,685 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/data/76fd5fb1a/bc1fc74613314f4d829f213dc11b5bff [2022-11-21 16:45:29,688 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:45:29,690 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:45:29,692 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:45:29,692 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:45:29,696 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:45:29,697 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:45:29" (1/1) ... [2022-11-21 16:45:29,698 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28723b29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:45:29, skipping insertion in model container [2022-11-21 16:45:29,699 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:45:29" (1/1) ... [2022-11-21 16:45:29,707 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:45:29,784 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:45:30,070 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:45:30,086 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) [2022-11-21 16:45:30,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6a80c46d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:45:30, skipping insertion in model container [2022-11-21 16:45:30,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:45:30,088 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-21 16:45:30,091 INFO L158 Benchmark]: Toolchain (without parser) took 399.87ms. Allocated memory was 134.2MB in the beginning and 167.8MB in the end (delta: 33.6MB). Free memory was 68.6MB in the beginning and 128.4MB in the end (delta: -59.8MB). Peak memory consumption was 7.6MB. Max. memory is 16.1GB. [2022-11-21 16:45:30,091 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 134.2MB. Free memory is still 101.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-21 16:45:30,093 INFO L158 Benchmark]: CACSL2BoogieTranslator took 396.89ms. Allocated memory was 134.2MB in the beginning and 167.8MB in the end (delta: 33.6MB). Free memory was 68.2MB in the beginning and 128.4MB in the end (delta: -60.2MB). Peak memory consumption was 7.6MB. Max. memory is 16.1GB. [2022-11-21 16:45:30,095 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 134.2MB. Free memory is still 101.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 396.89ms. Allocated memory was 134.2MB in the beginning and 167.8MB in the end (delta: 33.6MB). Free memory was 68.2MB in the beginning and 128.4MB in the end (delta: -60.2MB). Peak memory consumption was 7.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 530]: 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_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/bubblesort-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a --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 71daa4447a811360729951159d42c752715aafb50c3ad4dcb2ed5d242a4f4a78 --- 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-b5237d8 [2022-11-21 16:45:32,499 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:45:32,501 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:45:32,557 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:45:32,557 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:45:32,561 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:45:32,564 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:45:32,568 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:45:32,571 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:45:32,577 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:45:32,579 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:45:32,582 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:45:32,582 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:45:32,585 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:45:32,587 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:45:32,591 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:45:32,595 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:45:32,596 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:45:32,598 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:45:32,603 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:45:32,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:45:32,608 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:45:32,610 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:45:32,611 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:45:32,621 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:45:32,622 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:45:32,622 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:45:32,624 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:45:32,625 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:45:32,626 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:45:32,627 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:45:32,628 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:45:32,630 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:45:32,631 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:45:32,632 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:45:32,632 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:45:32,633 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:45:32,633 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:45:32,633 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:45:32,634 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:45:32,635 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:45:32,636 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-21 16:45:32,678 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:45:32,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:45:32,680 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:45:32,681 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:45:32,682 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:45:32,682 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:45:32,683 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:45:32,683 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:45:32,683 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:45:32,683 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:45:32,685 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:45:32,685 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-21 16:45:32,685 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:45:32,685 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:45:32,685 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:45:32,686 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-21 16:45:32,686 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-21 16:45:32,686 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-21 16:45:32,686 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:45:32,687 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-21 16:45:32,687 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-21 16:45:32,687 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-21 16:45:32,687 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:45:32,687 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:45:32,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:45:32,688 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:45:32,688 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:45:32,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:45:32,689 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:45:32,689 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:45:32,689 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-21 16:45:32,689 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-21 16:45:32,690 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-21 16:45:32,690 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_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71daa4447a811360729951159d42c752715aafb50c3ad4dcb2ed5d242a4f4a78 [2022-11-21 16:45:33,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:45:33,077 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:45:33,080 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:45:33,082 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:45:33,083 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:45:33,084 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/array-memsafety/bubblesort-alloca-2.i [2022-11-21 16:45:36,116 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:45:36,434 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:45:36,440 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/sv-benchmarks/c/array-memsafety/bubblesort-alloca-2.i [2022-11-21 16:45:36,465 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/data/013b2044c/614a835f110646b9868d07ec6a5e49a3/FLAG61ba670f2 [2022-11-21 16:45:36,486 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/data/013b2044c/614a835f110646b9868d07ec6a5e49a3 [2022-11-21 16:45:36,488 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:45:36,489 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:45:36,490 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:45:36,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:45:36,497 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:45:36,498 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:45:36" (1/1) ... [2022-11-21 16:45:36,499 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5df5340 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:45:36, skipping insertion in model container [2022-11-21 16:45:36,499 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:45:36" (1/1) ... [2022-11-21 16:45:36,507 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:45:36,562 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:45:36,857 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:45:36,874 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-21 16:45:36,890 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:45:36,938 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:45:36,950 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:45:37,035 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:45:37,067 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:45:37,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:45:37 WrapperNode [2022-11-21 16:45:37,069 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:45:37,070 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:45:37,070 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:45:37,071 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:45:37,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:45:37" (1/1) ... [2022-11-21 16:45:37,097 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:45:37" (1/1) ... [2022-11-21 16:45:37,117 INFO L138 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2022-11-21 16:45:37,117 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:45:37,118 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:45:37,118 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:45:37,118 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:45:37,128 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:45:37" (1/1) ... [2022-11-21 16:45:37,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:45:37" (1/1) ... [2022-11-21 16:45:37,132 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:45:37" (1/1) ... [2022-11-21 16:45:37,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:45:37" (1/1) ... [2022-11-21 16:45:37,140 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:45:37" (1/1) ... [2022-11-21 16:45:37,144 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:45:37" (1/1) ... [2022-11-21 16:45:37,146 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:45:37" (1/1) ... [2022-11-21 16:45:37,147 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:45:37" (1/1) ... [2022-11-21 16:45:37,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:45:37,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:45:37,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:45:37,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:45:37,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:45:37" (1/1) ... [2022-11-21 16:45:37,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:45:37,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:45:37,195 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:45:37,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:45:37,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-21 16:45:37,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 16:45:37,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 16:45:37,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-21 16:45:37,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:45:37,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:45:37,387 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:45:37,389 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:45:37,769 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:45:37,783 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:45:37,783 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-21 16:45:37,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:45:37 BoogieIcfgContainer [2022-11-21 16:45:37,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:45:37,789 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:45:37,789 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:45:37,793 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:45:37,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:45:36" (1/3) ... [2022-11-21 16:45:37,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6634f9f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:45:37, skipping insertion in model container [2022-11-21 16:45:37,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:45:37" (2/3) ... [2022-11-21 16:45:37,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6634f9f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:45:37, skipping insertion in model container [2022-11-21 16:45:37,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:45:37" (3/3) ... [2022-11-21 16:45:37,800 INFO L112 eAbstractionObserver]: Analyzing ICFG bubblesort-alloca-2.i [2022-11-21 16:45:37,823 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:45:37,824 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-11-21 16:45:37,895 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:45:37,902 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;@73aea6e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:45:37,903 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2022-11-21 16:45:37,907 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 25 states have (on average 1.92) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:37,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-21 16:45:37,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:45:37,917 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-21 16:45:37,918 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 16:45:37,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:37,928 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2022-11-21 16:45:37,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:45:37,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1712948959] [2022-11-21 16:45:37,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:37,945 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 [2022-11-21 16:45:37,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:45:37,959 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:45:38,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:45:38,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:45:38,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 16:45:38,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:45:38,202 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 [2022-11-21 16:45:38,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:45:38,237 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:45:38,238 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:45:38,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1712948959] [2022-11-21 16:45:38,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1712948959] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:45:38,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:45:38,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:45:38,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957265568] [2022-11-21 16:45:38,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:45:38,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:45:38,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:45:38,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:45:38,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:45:38,308 INFO L87 Difference]: Start difference. First operand has 41 states, 25 states have (on average 1.92) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:38,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:45:38,427 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-11-21 16:45:38,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:45:38,431 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-21 16:45:38,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:45:38,439 INFO L225 Difference]: With dead ends: 40 [2022-11-21 16:45:38,440 INFO L226 Difference]: Without dead ends: 38 [2022-11-21 16:45:38,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:45:38,447 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 34 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:45:38,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 31 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:45:38,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-21 16:45:38,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-11-21 16:45:38,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.75) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:38,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-11-21 16:45:38,507 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 6 [2022-11-21 16:45:38,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:45:38,507 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-11-21 16:45:38,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:38,508 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-11-21 16:45:38,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-21 16:45:38,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:45:38,509 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-21 16:45:38,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:45:38,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:45:38,725 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 16:45:38,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:38,726 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2022-11-21 16:45:38,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:45:38,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [902452492] [2022-11-21 16:45:38,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:38,728 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 [2022-11-21 16:45:38,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:45:38,730 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:45:38,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:45:38,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:45:38,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 16:45:38,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:45:38,872 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 [2022-11-21 16:45:38,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:45:38,920 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:45:38,920 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:45:38,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [902452492] [2022-11-21 16:45:38,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [902452492] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:45:38,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:45:38,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:45:38,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210354966] [2022-11-21 16:45:38,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:45:38,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:45:38,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:45:38,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:45:38,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:45:38,932 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:39,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:45:39,223 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2022-11-21 16:45:39,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:45:39,224 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 [2022-11-21 16:45:39,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:45:39,225 INFO L225 Difference]: With dead ends: 77 [2022-11-21 16:45:39,225 INFO L226 Difference]: Without dead ends: 77 [2022-11-21 16:45:39,226 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 [2022-11-21 16:45:39,227 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 44 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:45:39,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 145 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:45:39,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-21 16:45:39,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 41. [2022-11-21 16:45:39,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:39,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-11-21 16:45:39,234 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 6 [2022-11-21 16:45:39,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:45:39,235 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-11-21 16:45:39,235 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) [2022-11-21 16:45:39,235 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-11-21 16:45:39,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-21 16:45:39,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:45:39,236 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-21 16:45:39,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:45:39,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:45:39,455 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 16:45:39,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:39,455 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2022-11-21 16:45:39,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:45:39,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [369925939] [2022-11-21 16:45:39,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:39,456 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 [2022-11-21 16:45:39,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:45:39,458 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:45:39,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:45:39,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:45:39,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 16:45:39,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:45:39,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-21 16:45:39,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:45:39,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:45:39,688 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:45:39,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [369925939] [2022-11-21 16:45:39,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [369925939] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:45:39,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:45:39,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:45:39,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853125427] [2022-11-21 16:45:39,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:45:39,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:45:39,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:45:39,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:45:39,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:45:39,691 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:39,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:45:39,918 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2022-11-21 16:45:39,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:45:39,919 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 [2022-11-21 16:45:39,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:45:39,920 INFO L225 Difference]: With dead ends: 45 [2022-11-21 16:45:39,920 INFO L226 Difference]: Without dead ends: 45 [2022-11-21 16:45:39,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:45:39,922 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 44 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:45:39,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 59 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:45:39,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-21 16:45:39,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2022-11-21 16:45:39,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:39,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-11-21 16:45:39,929 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 6 [2022-11-21 16:45:39,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:45:39,929 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-11-21 16:45:39,930 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) [2022-11-21 16:45:39,930 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-11-21 16:45:39,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-21 16:45:39,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:45:39,931 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:45:39,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:45:40,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:45:40,148 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 16:45:40,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:40,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2022-11-21 16:45:40,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:45:40,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1974835219] [2022-11-21 16:45:40,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:40,149 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:45:40,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:45:40,150 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:45:40,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:45:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:45:40,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 16:45:40,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:45:40,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:45:40,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:45:40,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:45:40,345 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:45:40,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1974835219] [2022-11-21 16:45:40,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1974835219] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:45:40,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:45:40,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-21 16:45:40,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225828180] [2022-11-21 16:45:40,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:45:40,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 16:45:40,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:45:40,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 16:45:40,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:45:40,348 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:40,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:45:40,435 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2022-11-21 16:45:40,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:45:40,436 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-21 16:45:40,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:45:40,437 INFO L225 Difference]: With dead ends: 75 [2022-11-21 16:45:40,437 INFO L226 Difference]: Without dead ends: 75 [2022-11-21 16:45:40,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:45:40,439 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 201 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:45:40,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 135 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:45:40,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-21 16:45:40,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 46. [2022-11-21 16:45:40,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 32 states have (on average 1.5625) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:40,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-11-21 16:45:40,445 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 10 [2022-11-21 16:45:40,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:45:40,446 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-11-21 16:45:40,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:40,446 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-11-21 16:45:40,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-21 16:45:40,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:45:40,447 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:45:40,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:45:40,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:45:40,659 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 16:45:40,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:40,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2022-11-21 16:45:40,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:45:40,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [696022617] [2022-11-21 16:45:40,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:40,660 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:45:40,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:45:40,662 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:45:40,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:45:40,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:45:40,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-21 16:45:40,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:45:40,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-21 16:45:41,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:45:41,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:45:41,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:45:41,547 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:45:41,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [696022617] [2022-11-21 16:45:41,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [696022617] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:45:41,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:45:41,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-21 16:45:41,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290073851] [2022-11-21 16:45:41,548 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:45:41,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 16:45:41,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:45:41,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 16:45:41,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:45:41,550 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 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) [2022-11-21 16:45:42,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:45:42,930 INFO L93 Difference]: Finished difference Result 116 states and 127 transitions. [2022-11-21 16:45:42,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 16:45:42,932 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 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 10 [2022-11-21 16:45:42,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:45:42,933 INFO L225 Difference]: With dead ends: 116 [2022-11-21 16:45:42,933 INFO L226 Difference]: Without dead ends: 116 [2022-11-21 16:45:42,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2022-11-21 16:45:42,935 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 334 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-21 16:45:42,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 105 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-21 16:45:42,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-21 16:45:42,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 58. [2022-11-21 16:45:42,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 44 states have (on average 1.4772727272727273) internal successors, (65), 57 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:42,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2022-11-21 16:45:42,942 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 10 [2022-11-21 16:45:42,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:45:42,943 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2022-11-21 16:45:42,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 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) [2022-11-21 16:45:42,943 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2022-11-21 16:45:42,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-21 16:45:42,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:45:42,944 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:45:42,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:45:43,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:45:43,163 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 16:45:43,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:43,163 INFO L85 PathProgramCache]: Analyzing trace with hash 363893197, now seen corresponding path program 1 times [2022-11-21 16:45:43,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:45:43,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [580980097] [2022-11-21 16:45:43,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:43,164 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 [2022-11-21 16:45:43,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:45:43,166 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:45:43,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:45:43,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:45:43,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 16:45:43,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:45:43,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:45:43,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:45:43,256 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:45:43,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [580980097] [2022-11-21 16:45:43,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [580980097] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:45:43,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:45:43,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:45:43,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737168149] [2022-11-21 16:45:43,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:45:43,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:45:43,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:45:43,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:45:43,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:45:43,259 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:43,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:45:43,331 INFO L93 Difference]: Finished difference Result 112 states and 123 transitions. [2022-11-21 16:45:43,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:45:43,333 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-21 16:45:43,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:45:43,335 INFO L225 Difference]: With dead ends: 112 [2022-11-21 16:45:43,335 INFO L226 Difference]: Without dead ends: 112 [2022-11-21 16:45:43,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:45:43,336 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 84 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:45:43,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 130 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:45:43,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-21 16:45:43,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 60. [2022-11-21 16:45:43,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 46 states have (on average 1.4565217391304348) internal successors, (67), 59 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:43,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2022-11-21 16:45:43,353 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 13 [2022-11-21 16:45:43,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:45:43,353 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2022-11-21 16:45:43,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:43,354 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2022-11-21 16:45:43,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-21 16:45:43,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:45:43,357 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:45:43,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:45:43,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:45:43,567 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 16:45:43,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:43,567 INFO L85 PathProgramCache]: Analyzing trace with hash 363893999, now seen corresponding path program 1 times [2022-11-21 16:45:43,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:45:43,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [103474569] [2022-11-21 16:45:43,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:43,568 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 [2022-11-21 16:45:43,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:45:43,572 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:45:43,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:45:43,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:45:43,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 16:45:43,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:45:43,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:45:43,670 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:45:43,670 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:45:43,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [103474569] [2022-11-21 16:45:43,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [103474569] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:45:43,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:45:43,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:45:43,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516574944] [2022-11-21 16:45:43,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:45:43,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:45:43,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:45:43,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:45:43,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:45:43,672 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:43,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:45:43,730 INFO L93 Difference]: Finished difference Result 90 states and 99 transitions. [2022-11-21 16:45:43,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:45:43,731 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-21 16:45:43,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:45:43,732 INFO L225 Difference]: With dead ends: 90 [2022-11-21 16:45:43,732 INFO L226 Difference]: Without dead ends: 90 [2022-11-21 16:45:43,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:45:43,733 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 37 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:45:43,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 155 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:45:43,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-21 16:45:43,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 61. [2022-11-21 16:45:43,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 47 states have (on average 1.446808510638298) internal successors, (68), 60 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) [2022-11-21 16:45:43,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2022-11-21 16:45:43,741 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 13 [2022-11-21 16:45:43,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:45:43,745 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2022-11-21 16:45:43,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:43,746 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2022-11-21 16:45:43,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-21 16:45:43,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:45:43,747 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:45:43,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:45:43,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:45:43,948 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 16:45:43,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:43,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1064957775, now seen corresponding path program 1 times [2022-11-21 16:45:43,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:45:43,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1127189720] [2022-11-21 16:45:43,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:43,949 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 [2022-11-21 16:45:43,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:45:43,950 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:45:43,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:45:44,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:45:44,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 16:45:44,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:45:44,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:45:44,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:45:44,129 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:45:44,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1127189720] [2022-11-21 16:45:44,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1127189720] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:45:44,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:45:44,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:45:44,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619693517] [2022-11-21 16:45:44,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:45:44,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:45:44,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:45:44,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:45:44,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:45:44,136 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:44,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:45:44,196 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2022-11-21 16:45:44,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:45:44,197 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-21 16:45:44,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:45:44,198 INFO L225 Difference]: With dead ends: 86 [2022-11-21 16:45:44,198 INFO L226 Difference]: Without dead ends: 86 [2022-11-21 16:45:44,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:45:44,199 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 85 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:45:44,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 68 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:45:44,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-21 16:45:44,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 62. [2022-11-21 16:45:44,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 48 states have (on average 1.4375) internal successors, (69), 61 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:44,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2022-11-21 16:45:44,204 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 13 [2022-11-21 16:45:44,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:45:44,204 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2022-11-21 16:45:44,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:44,204 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2022-11-21 16:45:44,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-21 16:45:44,205 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:45:44,205 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:45:44,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:45:44,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:45:44,406 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 16:45:44,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:44,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1064958577, now seen corresponding path program 1 times [2022-11-21 16:45:44,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:45:44,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1381999886] [2022-11-21 16:45:44,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:44,407 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 [2022-11-21 16:45:44,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:45:44,408 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:45:44,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:45:44,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:45:44,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 16:45:44,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:45:44,484 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 [2022-11-21 16:45:44,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:45:44,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:45:44,520 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:45:44,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1381999886] [2022-11-21 16:45:44,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1381999886] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:45:44,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:45:44,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:45:44,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705079192] [2022-11-21 16:45:44,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:45:44,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:45:44,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:45:44,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:45:44,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:45:44,524 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:44,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:45:44,654 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2022-11-21 16:45:44,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:45:44,655 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-21 16:45:44,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:45:44,655 INFO L225 Difference]: With dead ends: 56 [2022-11-21 16:45:44,655 INFO L226 Difference]: Without dead ends: 56 [2022-11-21 16:45:44,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:45:44,656 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 44 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:45:44,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 28 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:45:44,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-21 16:45:44,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-11-21 16:45:44,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 48 states have (on average 1.3125) internal successors, (63), 55 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) [2022-11-21 16:45:44,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2022-11-21 16:45:44,660 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 13 [2022-11-21 16:45:44,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:45:44,660 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2022-11-21 16:45:44,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:44,660 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2022-11-21 16:45:44,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-21 16:45:44,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:45:44,661 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:45:44,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:45:44,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:45:44,871 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 16:45:44,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:44,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1064958578, now seen corresponding path program 1 times [2022-11-21 16:45:44,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:45:44,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [108660276] [2022-11-21 16:45:44,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:44,872 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 [2022-11-21 16:45:44,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:45:44,873 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:45:44,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:45:44,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:45:44,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 16:45:44,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:45:44,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-21 16:45:45,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:45:45,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:45:45,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:45:45,785 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:45:45,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [108660276] [2022-11-21 16:45:45,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [108660276] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-21 16:45:45,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:45:45,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-11-21 16:45:45,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188954280] [2022-11-21 16:45:45,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:45:45,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:45:45,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:45:45,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:45:45,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:45:45,787 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:46,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:45:46,219 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2022-11-21 16:45:46,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:45:46,220 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-21 16:45:46,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:45:46,220 INFO L225 Difference]: With dead ends: 61 [2022-11-21 16:45:46,220 INFO L226 Difference]: Without dead ends: 61 [2022-11-21 16:45:46,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-21 16:45:46,222 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 114 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:45:46,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 42 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:45:46,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-21 16:45:46,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2022-11-21 16:45:46,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.28) internal successors, (64), 55 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) [2022-11-21 16:45:46,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2022-11-21 16:45:46,226 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 13 [2022-11-21 16:45:46,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:45:46,227 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2022-11-21 16:45:46,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:46,227 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2022-11-21 16:45:46,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-21 16:45:46,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:45:46,228 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:45:46,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:45:46,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:45:46,435 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 16:45:46,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:46,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1346022463, now seen corresponding path program 1 times [2022-11-21 16:45:46,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:45:46,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [726224915] [2022-11-21 16:45:46,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:46,436 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 [2022-11-21 16:45:46,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:45:46,437 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:45:46,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:45:46,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:45:46,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-21 16:45:46,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:45:46,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-21 16:45:46,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:45:46,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:45:46,862 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:45:46,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [726224915] [2022-11-21 16:45:46,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [726224915] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:45:46,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:45:46,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:45:46,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563099551] [2022-11-21 16:45:46,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:45:46,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 16:45:46,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:45:46,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 16:45:46,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:45:46,863 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:47,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:45:47,540 INFO L93 Difference]: Finished difference Result 84 states and 96 transitions. [2022-11-21 16:45:47,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:45:47,541 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-21 16:45:47,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:45:47,542 INFO L225 Difference]: With dead ends: 84 [2022-11-21 16:45:47,542 INFO L226 Difference]: Without dead ends: 84 [2022-11-21 16:45:47,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:45:47,543 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 98 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 16:45:47,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 49 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 16:45:47,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-21 16:45:47,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2022-11-21 16:45:47,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 65 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:47,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2022-11-21 16:45:47,548 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 14 [2022-11-21 16:45:47,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:45:47,548 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2022-11-21 16:45:47,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:47,548 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2022-11-21 16:45:47,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-21 16:45:47,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:45:47,549 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:45:47,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:45:47,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:45:47,759 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 16:45:47,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:47,759 INFO L85 PathProgramCache]: Analyzing trace with hash 267720213, now seen corresponding path program 1 times [2022-11-21 16:45:47,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:45:47,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1045945262] [2022-11-21 16:45:47,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:47,760 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 [2022-11-21 16:45:47,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:45:47,761 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:45:47,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:45:47,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:45:47,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 16:45:47,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:45:47,960 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_#t~malloc9#1.base_8| (_ BitVec 32))) (and (= (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_#t~malloc9#1.base_8| (_ bv0 1)) |c_#valid|) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_#t~malloc9#1.base_8|)))) is different from true [2022-11-21 16:45:47,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:45:47,961 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:45:47,961 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:45:47,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1045945262] [2022-11-21 16:45:47,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1045945262] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:45:47,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:45:47,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:45:47,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64215355] [2022-11-21 16:45:47,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:45:47,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:45:47,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:45:47,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:45:47,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=8, Unknown=1, NotChecked=4, Total=20 [2022-11-21 16:45:47,963 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:48,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:45:48,062 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2022-11-21 16:45:48,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:45:48,064 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2022-11-21 16:45:48,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:45:48,064 INFO L225 Difference]: With dead ends: 65 [2022-11-21 16:45:48,064 INFO L226 Difference]: Without dead ends: 63 [2022-11-21 16:45:48,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2022-11-21 16:45:48,065 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 18 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:45:48,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 46 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2022-11-21 16:45:48,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-21 16:45:48,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-11-21 16:45:48,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.2586206896551724) internal successors, (73), 62 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:48,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2022-11-21 16:45:48,069 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 16 [2022-11-21 16:45:48,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:45:48,069 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2022-11-21 16:45:48,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:48,069 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2022-11-21 16:45:48,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-21 16:45:48,070 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:45:48,070 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:45:48,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:45:48,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:45:48,270 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 16:45:48,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:48,271 INFO L85 PathProgramCache]: Analyzing trace with hash -290583109, now seen corresponding path program 1 times [2022-11-21 16:45:48,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:45:48,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [866577891] [2022-11-21 16:45:48,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:48,272 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 [2022-11-21 16:45:48,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:45:48,273 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:45:48,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:45:48,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:45:48,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 16:45:48,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:45:48,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:45:48,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:45:48,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:45:48,458 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:45:48,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [866577891] [2022-11-21 16:45:48,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [866577891] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:45:48,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:45:48,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-21 16:45:48,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633641054] [2022-11-21 16:45:48,459 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:45:48,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 16:45:48,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:45:48,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 16:45:48,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:45:48,460 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:48,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:45:48,535 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2022-11-21 16:45:48,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:45:48,536 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 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 [2022-11-21 16:45:48,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:45:48,537 INFO L225 Difference]: With dead ends: 65 [2022-11-21 16:45:48,537 INFO L226 Difference]: Without dead ends: 54 [2022-11-21 16:45:48,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:45:48,538 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 4 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:45:48,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 141 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:45:48,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-21 16:45:48,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-11-21 16:45:48,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 53 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) [2022-11-21 16:45:48,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-11-21 16:45:48,541 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 17 [2022-11-21 16:45:48,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:45:48,541 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-11-21 16:45:48,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:48,542 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-11-21 16:45:48,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-21 16:45:48,542 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:45:48,542 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:45:48,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:45:48,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:45:48,751 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 16:45:48,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:48,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1570446787, now seen corresponding path program 1 times [2022-11-21 16:45:48,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:45:48,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [656678205] [2022-11-21 16:45:48,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:48,752 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 [2022-11-21 16:45:48,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:45:48,753 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:45:48,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:45:48,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:45:48,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 16:45:48,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:45:48,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:45:48,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:45:48,917 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:45:48,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [656678205] [2022-11-21 16:45:48,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [656678205] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:45:48,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:45:48,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 16:45:48,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542908100] [2022-11-21 16:45:48,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:45:48,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 16:45:48,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:45:48,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 16:45:48,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:45:48,919 INFO L87 Difference]: Start difference. First operand 54 states and 63 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) [2022-11-21 16:45:49,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:45:49,202 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2022-11-21 16:45:49,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:45:49,203 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 [2022-11-21 16:45:49,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:45:49,204 INFO L225 Difference]: With dead ends: 73 [2022-11-21 16:45:49,204 INFO L226 Difference]: Without dead ends: 71 [2022-11-21 16:45:49,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:45:49,205 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 97 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:45:49,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 72 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:45:49,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-21 16:45:49,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 54. [2022-11-21 16:45:49,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 53 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:49,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-11-21 16:45:49,208 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 17 [2022-11-21 16:45:49,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:45:49,209 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-11-21 16:45:49,209 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) [2022-11-21 16:45:49,209 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-11-21 16:45:49,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-21 16:45:49,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:45:49,210 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:45:49,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:45:49,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:45:49,411 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 16:45:49,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:49,411 INFO L85 PathProgramCache]: Analyzing trace with hash -511225436, now seen corresponding path program 1 times [2022-11-21 16:45:49,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:45:49,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1260020954] [2022-11-21 16:45:49,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:49,412 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:45:49,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:45:49,413 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:45:49,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:45:49,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:45:49,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 16:45:49,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:45:49,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-21 16:45:51,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:45:51,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:45:52,488 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:45:52,488 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:45:52,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1260020954] [2022-11-21 16:45:52,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1260020954] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:45:52,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:45:52,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2022-11-21 16:45:52,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305376772] [2022-11-21 16:45:52,489 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:45:52,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-21 16:45:52,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:45:52,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-21 16:45:52,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-21 16:45:52,490 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:55,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:45:55,346 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2022-11-21 16:45:55,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 16:45:55,348 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 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 [2022-11-21 16:45:55,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:45:55,348 INFO L225 Difference]: With dead ends: 82 [2022-11-21 16:45:55,348 INFO L226 Difference]: Without dead ends: 82 [2022-11-21 16:45:55,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2022-11-21 16:45:55,349 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 212 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:45:55,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 64 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-21 16:45:55,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-21 16:45:55,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 57. [2022-11-21 16:45:55,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 56 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) [2022-11-21 16:45:55,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2022-11-21 16:45:55,353 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 18 [2022-11-21 16:45:55,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:45:55,354 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2022-11-21 16:45:55,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:55,354 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2022-11-21 16:45:55,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-21 16:45:55,355 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:45:55,355 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:45:55,366 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:45:55,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:45:55,563 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 16:45:55,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:55,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1331880655, now seen corresponding path program 1 times [2022-11-21 16:45:55,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:45:55,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1332876412] [2022-11-21 16:45:55,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:45:55,564 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 [2022-11-21 16:45:55,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:45:55,565 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:45:55,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:45:55,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:45:55,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-21 16:45:55,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:45:55,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-21 16:45:55,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:45:55,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:45:57,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:45:57,288 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:45:57,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1332876412] [2022-11-21 16:45:57,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1332876412] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:45:57,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:45:57,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2022-11-21 16:45:57,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494311816] [2022-11-21 16:45:57,289 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:45:57,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-21 16:45:57,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:45:57,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-21 16:45:57,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-11-21 16:45:57,291 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 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) [2022-11-21 16:45:58,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:45:58,505 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2022-11-21 16:45:58,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 16:45:58,507 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 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 19 [2022-11-21 16:45:58,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:45:58,507 INFO L225 Difference]: With dead ends: 62 [2022-11-21 16:45:58,507 INFO L226 Difference]: Without dead ends: 57 [2022-11-21 16:45:58,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2022-11-21 16:45:58,508 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 94 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-21 16:45:58,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 76 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-21 16:45:58,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-21 16:45:58,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-11-21 16:45:58,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:45:58,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-11-21 16:45:58,511 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 19 [2022-11-21 16:45:58,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:45:58,512 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-11-21 16:45:58,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 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) [2022-11-21 16:45:58,512 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-11-21 16:45:58,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-21 16:45:58,513 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:45:58,513 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1] [2022-11-21 16:45:58,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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)] Ended with exit code 0 [2022-11-21 16:45:58,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:45:58,723 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 16:45:58,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:45:58,723 INFO L85 PathProgramCache]: Analyzing trace with hash 302966996, now seen corresponding path program 2 times [2022-11-21 16:45:58,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:45:58,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1677385733] [2022-11-21 16:45:58,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:45:58,724 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:45:58,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:45:58,724 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:45:58,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:45:58,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:45:58,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:45:58,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 16:45:58,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:45:58,820 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 8 treesize of output 7 [2022-11-21 16:45:59,296 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:45:59,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:46:00,874 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:46:00,874 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:46:00,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1677385733] [2022-11-21 16:46:00,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1677385733] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:46:00,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:46:00,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-11-21 16:46:00,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187426682] [2022-11-21 16:46:00,875 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:46:00,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 16:46:00,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:46:00,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 16:46:00,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-11-21 16:46:00,877 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:46:04,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:46:07,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:46:07,528 INFO L93 Difference]: Finished difference Result 319 states and 384 transitions. [2022-11-21 16:46:07,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-21 16:46:07,530 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-21 16:46:07,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:46:07,531 INFO L225 Difference]: With dead ends: 319 [2022-11-21 16:46:07,531 INFO L226 Difference]: Without dead ends: 319 [2022-11-21 16:46:07,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=327, Invalid=665, Unknown=0, NotChecked=0, Total=992 [2022-11-21 16:46:07,532 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 859 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:46:07,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [859 Valid, 310 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-21 16:46:07,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-11-21 16:46:07,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 81. [2022-11-21 16:46:07,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 79 states have (on average 1.2278481012658229) internal successors, (97), 80 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:46:07,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2022-11-21 16:46:07,538 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 22 [2022-11-21 16:46:07,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:46:07,538 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2022-11-21 16:46:07,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:46:07,539 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2022-11-21 16:46:07,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-21 16:46:07,540 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:46:07,540 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:46:07,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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)] Ended with exit code 0 [2022-11-21 16:46:07,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:46:07,752 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 16:46:07,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:46:07,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1637861780, now seen corresponding path program 2 times [2022-11-21 16:46:07,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:46:07,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1105095523] [2022-11-21 16:46:07,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:46:07,753 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 [2022-11-21 16:46:07,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:46:07,754 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:46:07,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:46:07,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:46:07,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:46:07,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-21 16:46:07,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:46:07,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-21 16:46:08,461 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 16:46:08,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:46:10,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 16:46:10,236 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:46:10,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1105095523] [2022-11-21 16:46:10,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1105095523] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:46:10,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:46:10,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-21 16:46:10,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353191937] [2022-11-21 16:46:10,237 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:46:10,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-21 16:46:10,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:46:10,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-21 16:46:10,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-21 16:46:10,238 INFO L87 Difference]: Start difference. First operand 81 states and 97 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 16 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) [2022-11-21 16:46:16,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:46:16,555 INFO L93 Difference]: Finished difference Result 165 states and 196 transitions. [2022-11-21 16:46:16,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-21 16:46:16,556 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 16 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 23 [2022-11-21 16:46:16,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:46:16,557 INFO L225 Difference]: With dead ends: 165 [2022-11-21 16:46:16,557 INFO L226 Difference]: Without dead ends: 165 [2022-11-21 16:46:16,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=418, Invalid=988, Unknown=0, NotChecked=0, Total=1406 [2022-11-21 16:46:16,559 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 312 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-21 16:46:16,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 63 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-21 16:46:16,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-21 16:46:16,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 148. [2022-11-21 16:46:16,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 146 states have (on average 1.2191780821917808) internal successors, (178), 147 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:46:16,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 178 transitions. [2022-11-21 16:46:16,564 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 178 transitions. Word has length 23 [2022-11-21 16:46:16,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:46:16,564 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 178 transitions. [2022-11-21 16:46:16,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 16 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) [2022-11-21 16:46:16,564 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 178 transitions. [2022-11-21 16:46:16,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-21 16:46:16,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:46:16,565 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:46:16,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:46:16,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:46:16,766 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 16:46:16,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:46:16,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1795053594, now seen corresponding path program 1 times [2022-11-21 16:46:16,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:46:16,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2070318709] [2022-11-21 16:46:16,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:46:16,767 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 [2022-11-21 16:46:16,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:46:16,768 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:46:16,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:46:16,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:46:16,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 16:46:16,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:46:17,118 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 16:46:17,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:46:17,753 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:46:17,754 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:46:17,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2070318709] [2022-11-21 16:46:17,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2070318709] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:46:17,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:46:17,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2022-11-21 16:46:17,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467120031] [2022-11-21 16:46:17,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:46:17,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-21 16:46:17,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:46:17,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-21 16:46:17,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-11-21 16:46:17,756 INFO L87 Difference]: Start difference. First operand 148 states and 178 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:46:19,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:46:19,060 INFO L93 Difference]: Finished difference Result 191 states and 226 transitions. [2022-11-21 16:46:19,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-21 16:46:19,061 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-21 16:46:19,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:46:19,062 INFO L225 Difference]: With dead ends: 191 [2022-11-21 16:46:19,062 INFO L226 Difference]: Without dead ends: 148 [2022-11-21 16:46:19,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2022-11-21 16:46:19,063 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 155 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-21 16:46:19,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 119 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-21 16:46:19,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-21 16:46:19,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-11-21 16:46:19,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 146 states have (on average 1.2123287671232876) internal successors, (177), 147 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:46:19,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 177 transitions. [2022-11-21 16:46:19,068 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 177 transitions. Word has length 31 [2022-11-21 16:46:19,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:46:19,069 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 177 transitions. [2022-11-21 16:46:19,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:46:19,069 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 177 transitions. [2022-11-21 16:46:19,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-21 16:46:19,070 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:46:19,070 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:46:19,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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)] Ended with exit code 0 [2022-11-21 16:46:19,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:46:19,275 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 16:46:19,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:46:19,275 INFO L85 PathProgramCache]: Analyzing trace with hash -403560393, now seen corresponding path program 2 times [2022-11-21 16:46:19,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:46:19,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1523240464] [2022-11-21 16:46:19,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:46:19,276 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 [2022-11-21 16:46:19,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:46:19,277 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:46:19,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:46:19,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:46:19,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:46:19,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-21 16:46:19,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:46:19,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-21 16:46:20,024 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-21 16:46:20,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:46:20,821 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-21 16:46:20,821 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:46:20,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1523240464] [2022-11-21 16:46:20,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1523240464] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:46:20,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:46:20,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-21 16:46:20,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13151157] [2022-11-21 16:46:20,822 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:46:20,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 16:46:20,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:46:20,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 16:46:20,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-21 16:46:20,824 INFO L87 Difference]: Start difference. First operand 148 states and 177 transitions. Second operand has 14 states, 13 states have (on average 4.0) internal successors, (52), 14 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) [2022-11-21 16:46:21,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:46:21,560 INFO L93 Difference]: Finished difference Result 152 states and 179 transitions. [2022-11-21 16:46:21,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 16:46:21,561 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.0) internal successors, (52), 14 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 35 [2022-11-21 16:46:21,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:46:21,562 INFO L225 Difference]: With dead ends: 152 [2022-11-21 16:46:21,562 INFO L226 Difference]: Without dead ends: 152 [2022-11-21 16:46:21,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-11-21 16:46:21,563 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 194 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 16:46:21,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 59 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 16:46:21,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-21 16:46:21,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 126. [2022-11-21 16:46:21,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 124 states have (on average 1.1935483870967742) internal successors, (148), 125 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) [2022-11-21 16:46:21,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 148 transitions. [2022-11-21 16:46:21,567 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 148 transitions. Word has length 35 [2022-11-21 16:46:21,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:46:21,568 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 148 transitions. [2022-11-21 16:46:21,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.0) internal successors, (52), 14 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) [2022-11-21 16:46:21,568 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 148 transitions. [2022-11-21 16:46:21,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-21 16:46:21,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:46:21,569 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:46:21,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:46:21,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:46:21,769 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 16:46:21,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:46:21,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1815017593, now seen corresponding path program 3 times [2022-11-21 16:46:21,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:46:21,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [632339332] [2022-11-21 16:46:21,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:46:21,771 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 [2022-11-21 16:46:21,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:46:21,772 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:46:21,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:46:21,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-21 16:46:21,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:46:21,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-21 16:46:21,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:46:21,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-21 16:46:22,782 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-21 16:46:22,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:46:25,401 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-21 16:46:25,401 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:46:25,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [632339332] [2022-11-21 16:46:25,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [632339332] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:46:25,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:46:25,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2022-11-21 16:46:25,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883603953] [2022-11-21 16:46:25,401 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:46:25,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-21 16:46:25,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:46:25,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-21 16:46:25,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-11-21 16:46:25,403 INFO L87 Difference]: Start difference. First operand 126 states and 148 transitions. Second operand has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:46:31,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:46:31,417 INFO L93 Difference]: Finished difference Result 230 states and 267 transitions. [2022-11-21 16:46:31,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-21 16:46:31,418 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 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 38 [2022-11-21 16:46:31,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:46:31,419 INFO L225 Difference]: With dead ends: 230 [2022-11-21 16:46:31,419 INFO L226 Difference]: Without dead ends: 230 [2022-11-21 16:46:31,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=393, Invalid=1247, Unknown=0, NotChecked=0, Total=1640 [2022-11-21 16:46:31,420 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 801 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 801 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-21 16:46:31,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [801 Valid, 163 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-21 16:46:31,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-21 16:46:31,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 164. [2022-11-21 16:46:31,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 162 states have (on average 1.1975308641975309) internal successors, (194), 163 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:46:31,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 194 transitions. [2022-11-21 16:46:31,426 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 194 transitions. Word has length 38 [2022-11-21 16:46:31,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:46:31,426 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 194 transitions. [2022-11-21 16:46:31,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:46:31,427 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 194 transitions. [2022-11-21 16:46:31,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-21 16:46:31,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:46:31,428 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:46:31,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:46:31,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:46:31,644 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 16:46:31,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:46:31,645 INFO L85 PathProgramCache]: Analyzing trace with hash 63698229, now seen corresponding path program 4 times [2022-11-21 16:46:31,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:46:31,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1431027499] [2022-11-21 16:46:31,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:46:31,645 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 [2022-11-21 16:46:31,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:46:31,646 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:46:31,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:46:31,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:46:31,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:46:31,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 16:46:31,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:46:32,030 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-21 16:46:32,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:46:32,521 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-21 16:46:32,522 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:46:32,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1431027499] [2022-11-21 16:46:32,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1431027499] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:46:32,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:46:32,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-11-21 16:46:32,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494134059] [2022-11-21 16:46:32,523 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:46:32,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 16:46:32,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:46:32,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 16:46:32,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-11-21 16:46:32,525 INFO L87 Difference]: Start difference. First operand 164 states and 194 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 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) [2022-11-21 16:46:33,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:46:33,362 INFO L93 Difference]: Finished difference Result 165 states and 193 transitions. [2022-11-21 16:46:33,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-21 16:46:33,366 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 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 40 [2022-11-21 16:46:33,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:46:33,367 INFO L225 Difference]: With dead ends: 165 [2022-11-21 16:46:33,367 INFO L226 Difference]: Without dead ends: 165 [2022-11-21 16:46:33,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2022-11-21 16:46:33,368 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 361 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:46:33,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 94 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-21 16:46:33,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-21 16:46:33,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2022-11-21 16:46:33,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 162 states have (on average 1.191358024691358) internal successors, (193), 163 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:46:33,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 193 transitions. [2022-11-21 16:46:33,373 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 193 transitions. Word has length 40 [2022-11-21 16:46:33,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:46:33,373 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 193 transitions. [2022-11-21 16:46:33,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 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) [2022-11-21 16:46:33,374 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 193 transitions. [2022-11-21 16:46:33,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-21 16:46:33,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:46:33,375 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:46:33,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:46:33,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:46:33,583 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 16:46:33,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:46:33,583 INFO L85 PathProgramCache]: Analyzing trace with hash -73696953, now seen corresponding path program 3 times [2022-11-21 16:46:33,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:46:33,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1009613504] [2022-11-21 16:46:33,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:46:33,584 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 [2022-11-21 16:46:33,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:46:33,585 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:46:33,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:46:33,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-21 16:46:33,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:46:33,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-21 16:46:33,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:46:33,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-21 16:46:34,717 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:46:34,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:46:35,832 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:46:35,832 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:46:35,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1009613504] [2022-11-21 16:46:35,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1009613504] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:46:35,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:46:35,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-11-21 16:46:35,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186549510] [2022-11-21 16:46:35,833 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:46:35,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-21 16:46:35,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:46:35,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-21 16:46:35,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-11-21 16:46:35,834 INFO L87 Difference]: Start difference. First operand 164 states and 193 transitions. Second operand has 26 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 26 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:46:39,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:46:39,432 INFO L93 Difference]: Finished difference Result 438 states and 505 transitions. [2022-11-21 16:46:39,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-21 16:46:39,433 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 26 states have internal predecessors, (81), 0 states have call successors, (0), 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 42 [2022-11-21 16:46:39,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:46:39,439 INFO L225 Difference]: With dead ends: 438 [2022-11-21 16:46:39,440 INFO L226 Difference]: Without dead ends: 432 [2022-11-21 16:46:39,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=302, Invalid=1104, Unknown=0, NotChecked=0, Total=1406 [2022-11-21 16:46:39,441 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 572 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-21 16:46:39,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [572 Valid, 326 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-21 16:46:39,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-11-21 16:46:39,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 401. [2022-11-21 16:46:39,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 399 states have (on average 1.1804511278195489) internal successors, (471), 400 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:46:39,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 471 transitions. [2022-11-21 16:46:39,451 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 471 transitions. Word has length 42 [2022-11-21 16:46:39,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:46:39,452 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 471 transitions. [2022-11-21 16:46:39,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1153846153846154) internal successors, (81), 26 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:46:39,452 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 471 transitions. [2022-11-21 16:46:39,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-21 16:46:39,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:46:39,453 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:46:39,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:46:39,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:46:39,666 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 16:46:39,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:46:39,666 INFO L85 PathProgramCache]: Analyzing trace with hash -43465353, now seen corresponding path program 5 times [2022-11-21 16:46:39,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:46:39,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1733111711] [2022-11-21 16:46:39,667 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:46:39,667 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 [2022-11-21 16:46:39,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:46:39,668 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:46:39,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:46:39,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-21 16:46:39,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:46:39,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-21 16:46:39,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:46:40,248 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 30 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-21 16:46:40,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:46:40,791 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 30 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-21 16:46:40,791 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:46:40,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1733111711] [2022-11-21 16:46:40,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1733111711] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:46:40,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:46:40,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-11-21 16:46:40,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234765087] [2022-11-21 16:46:40,792 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:46:40,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 16:46:40,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:46:40,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 16:46:40,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-11-21 16:46:40,794 INFO L87 Difference]: Start difference. First operand 401 states and 471 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 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) [2022-11-21 16:46:41,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:46:41,763 INFO L93 Difference]: Finished difference Result 531 states and 612 transitions. [2022-11-21 16:46:41,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-21 16:46:41,764 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 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 45 [2022-11-21 16:46:41,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:46:41,765 INFO L225 Difference]: With dead ends: 531 [2022-11-21 16:46:41,766 INFO L226 Difference]: Without dead ends: 354 [2022-11-21 16:46:41,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=154, Invalid=398, Unknown=0, NotChecked=0, Total=552 [2022-11-21 16:46:41,767 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 117 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-21 16:46:41,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 224 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-21 16:46:41,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-11-21 16:46:41,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 333. [2022-11-21 16:46:41,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 331 states have (on average 1.1268882175226587) internal successors, (373), 332 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:46:41,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 373 transitions. [2022-11-21 16:46:41,776 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 373 transitions. Word has length 45 [2022-11-21 16:46:41,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:46:41,777 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 373 transitions. [2022-11-21 16:46:41,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 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) [2022-11-21 16:46:41,777 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 373 transitions. [2022-11-21 16:46:41,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-21 16:46:41,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:46:41,778 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1] [2022-11-21 16:46:41,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:46:42,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:46:42,000 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 16:46:42,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:46:42,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1048882662, now seen corresponding path program 3 times [2022-11-21 16:46:42,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:46:42,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [792971605] [2022-11-21 16:46:42,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:46:42,001 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 [2022-11-21 16:46:42,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:46:42,002 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:46:42,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:46:42,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-21 16:46:42,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:46:42,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 16:46:42,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:46:42,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-21 16:46:43,248 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:46:43,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:46:47,302 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:46:47,303 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:46:47,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [792971605] [2022-11-21 16:46:47,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [792971605] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:46:47,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:46:47,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2022-11-21 16:46:47,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27562194] [2022-11-21 16:46:47,303 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:46:47,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-21 16:46:47,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:46:47,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-21 16:46:47,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=638, Unknown=0, NotChecked=0, Total=870 [2022-11-21 16:46:47,305 INFO L87 Difference]: Start difference. First operand 333 states and 373 transitions. Second operand has 30 states, 29 states have (on average 3.103448275862069) internal successors, (90), 30 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:46:56,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:47:01,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:47:21,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:47:21,377 INFO L93 Difference]: Finished difference Result 2766 states and 3105 transitions. [2022-11-21 16:47:21,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-21 16:47:21,380 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.103448275862069) internal successors, (90), 30 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-21 16:47:21,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:47:21,387 INFO L225 Difference]: With dead ends: 2766 [2022-11-21 16:47:21,387 INFO L226 Difference]: Without dead ends: 2766 [2022-11-21 16:47:21,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 27.9s TimeCoverageRelationStatistics Valid=1194, Invalid=2588, Unknown=0, NotChecked=0, Total=3782 [2022-11-21 16:47:21,390 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 2651 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 1435 mSolverCounterSat, 44 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2651 SdHoareTripleChecker+Valid, 1090 SdHoareTripleChecker+Invalid, 1480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1435 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:47:21,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2651 Valid, 1090 Invalid, 1480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1435 Invalid, 1 Unknown, 0 Unchecked, 9.1s Time] [2022-11-21 16:47:21,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2022-11-21 16:47:21,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 381. [2022-11-21 16:47:21,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 379 states have (on average 1.1424802110817942) internal successors, (433), 380 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:47:21,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 433 transitions. [2022-11-21 16:47:21,425 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 433 transitions. Word has length 46 [2022-11-21 16:47:21,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:47:21,425 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 433 transitions. [2022-11-21 16:47:21,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.103448275862069) internal successors, (90), 30 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:47:21,426 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 433 transitions. [2022-11-21 16:47:21,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-21 16:47:21,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:47:21,427 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:47:21,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:47:21,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:47:21,640 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 16:47:21,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:47:21,640 INFO L85 PathProgramCache]: Analyzing trace with hash -557992115, now seen corresponding path program 4 times [2022-11-21 16:47:21,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:47:21,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1680587915] [2022-11-21 16:47:21,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:47:21,641 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 [2022-11-21 16:47:21,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:47:21,642 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:47:21,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:47:21,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:47:21,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:47:21,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-21 16:47:21,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:47:21,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-21 16:47:23,029 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-21 16:47:23,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:47:26,696 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-21 16:47:26,697 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:47:26,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1680587915] [2022-11-21 16:47:26,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1680587915] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:47:26,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:47:26,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2022-11-21 16:47:26,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414217293] [2022-11-21 16:47:26,697 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:47:26,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-21 16:47:26,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:47:26,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-21 16:47:26,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2022-11-21 16:47:26,699 INFO L87 Difference]: Start difference. First operand 381 states and 433 transitions. Second operand has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:48:05,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:48:05,441 INFO L93 Difference]: Finished difference Result 487 states and 553 transitions. [2022-11-21 16:48:05,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-21 16:48:05,442 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 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 50 [2022-11-21 16:48:05,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:48:05,444 INFO L225 Difference]: With dead ends: 487 [2022-11-21 16:48:05,444 INFO L226 Difference]: Without dead ends: 487 [2022-11-21 16:48:05,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 30.2s TimeCoverageRelationStatistics Valid=1118, Invalid=3042, Unknown=0, NotChecked=0, Total=4160 [2022-11-21 16:48:05,446 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1002 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1002 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2022-11-21 16:48:05,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1002 Valid, 275 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 10.8s Time] [2022-11-21 16:48:05,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-11-21 16:48:05,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 471. [2022-11-21 16:48:05,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 469 states have (on average 1.1535181236673775) internal successors, (541), 470 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:48:05,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 541 transitions. [2022-11-21 16:48:05,456 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 541 transitions. Word has length 50 [2022-11-21 16:48:05,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:48:05,456 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 541 transitions. [2022-11-21 16:48:05,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:48:05,457 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 541 transitions. [2022-11-21 16:48:05,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-21 16:48:05,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:48:05,458 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:48:05,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-21 16:48:05,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:48:05,671 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 16:48:05,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:48:05,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1100826424, now seen corresponding path program 6 times [2022-11-21 16:48:05,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:48:05,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1880457281] [2022-11-21 16:48:05,672 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:48:05,672 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 [2022-11-21 16:48:05,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:48:05,673 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:48:05,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:48:05,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-21 16:48:05,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:48:05,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-21 16:48:05,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:48:06,616 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 22 proven. 50 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-21 16:48:06,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:48:07,957 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 29 proven. 43 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-21 16:48:07,957 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:48:07,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1880457281] [2022-11-21 16:48:07,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1880457281] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:48:07,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:48:07,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2022-11-21 16:48:07,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139659626] [2022-11-21 16:48:07,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:48:07,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-21 16:48:07,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:48:07,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-21 16:48:07,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2022-11-21 16:48:07,959 INFO L87 Difference]: Start difference. First operand 471 states and 541 transitions. Second operand has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 26 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:48:12,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:48:12,042 INFO L93 Difference]: Finished difference Result 483 states and 546 transitions. [2022-11-21 16:48:12,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-21 16:48:12,043 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 26 states have internal predecessors, (80), 0 states have call successors, (0), 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 54 [2022-11-21 16:48:12,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:48:12,044 INFO L225 Difference]: With dead ends: 483 [2022-11-21 16:48:12,045 INFO L226 Difference]: Without dead ends: 347 [2022-11-21 16:48:12,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=535, Invalid=2015, Unknown=0, NotChecked=0, Total=2550 [2022-11-21 16:48:12,046 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 548 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-21 16:48:12,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [548 Valid, 295 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-21 16:48:12,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-11-21 16:48:12,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 345. [2022-11-21 16:48:12,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 343 states have (on average 1.163265306122449) internal successors, (399), 344 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:48:12,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 399 transitions. [2022-11-21 16:48:12,054 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 399 transitions. Word has length 54 [2022-11-21 16:48:12,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:48:12,054 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 399 transitions. [2022-11-21 16:48:12,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 26 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:48:12,055 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 399 transitions. [2022-11-21 16:48:12,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-21 16:48:12,056 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:48:12,056 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:48:12,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:48:12,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:48:12,272 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 16:48:12,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:48:12,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1495142415, now seen corresponding path program 7 times [2022-11-21 16:48:12,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:48:12,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [897950167] [2022-11-21 16:48:12,273 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 16:48:12,273 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 [2022-11-21 16:48:12,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:48:12,274 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:48:12,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:48:12,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:48:12,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-21 16:48:12,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:48:12,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-21 16:48:14,111 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-21 16:48:14,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:48:17,584 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 1 proven. 100 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-21 16:48:17,584 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:48:17,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [897950167] [2022-11-21 16:48:17,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [897950167] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:48:17,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:48:17,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2022-11-21 16:48:17,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261618795] [2022-11-21 16:48:17,585 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:48:17,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-21 16:48:17,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:48:17,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-21 16:48:17,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2022-11-21 16:48:17,586 INFO L87 Difference]: Start difference. First operand 345 states and 399 transitions. Second operand has 27 states, 26 states have (on average 3.5384615384615383) internal successors, (92), 27 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:48:22,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:48:22,746 INFO L93 Difference]: Finished difference Result 483 states and 549 transitions. [2022-11-21 16:48:22,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-21 16:48:22,747 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.5384615384615383) internal successors, (92), 27 states have internal predecessors, (92), 0 states have call successors, (0), 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 63 [2022-11-21 16:48:22,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:48:22,749 INFO L225 Difference]: With dead ends: 483 [2022-11-21 16:48:22,749 INFO L226 Difference]: Without dead ends: 483 [2022-11-21 16:48:22,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=579, Invalid=2073, Unknown=0, NotChecked=0, Total=2652 [2022-11-21 16:48:22,750 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 1155 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1155 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:48:22,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1155 Valid, 276 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-21 16:48:22,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-11-21 16:48:22,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 403. [2022-11-21 16:48:22,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 401 states have (on average 1.1496259351620948) internal successors, (461), 402 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:48:22,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 461 transitions. [2022-11-21 16:48:22,760 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 461 transitions. Word has length 63 [2022-11-21 16:48:22,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:48:22,760 INFO L495 AbstractCegarLoop]: Abstraction has 403 states and 461 transitions. [2022-11-21 16:48:22,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.5384615384615383) internal successors, (92), 27 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:48:22,761 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 461 transitions. [2022-11-21 16:48:22,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-21 16:48:22,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:48:22,762 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:48:22,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:48:22,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:48:22,983 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 16:48:22,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:48:22,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1428738709, now seen corresponding path program 8 times [2022-11-21 16:48:22,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:48:22,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1988149995] [2022-11-21 16:48:22,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:48:22,984 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:48:22,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:48:22,985 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:48:22,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:48:23,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:48:23,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:48:23,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-21 16:48:23,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:48:23,968 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 98 proven. 79 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-21 16:48:23,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:48:26,318 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 95 proven. 100 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-21 16:48:26,318 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:48:26,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1988149995] [2022-11-21 16:48:26,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1988149995] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:48:26,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:48:26,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2022-11-21 16:48:26,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51110791] [2022-11-21 16:48:26,319 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:48:26,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-21 16:48:26,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:48:26,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-21 16:48:26,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2022-11-21 16:48:26,320 INFO L87 Difference]: Start difference. First operand 403 states and 461 transitions. Second operand has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:48:29,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:48:29,766 INFO L93 Difference]: Finished difference Result 544 states and 614 transitions. [2022-11-21 16:48:29,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-21 16:48:29,767 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 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 73 [2022-11-21 16:48:29,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:48:29,768 INFO L225 Difference]: With dead ends: 544 [2022-11-21 16:48:29,768 INFO L226 Difference]: Without dead ends: 403 [2022-11-21 16:48:29,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=421, Invalid=1835, Unknown=0, NotChecked=0, Total=2256 [2022-11-21 16:48:29,770 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 303 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:48:29,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 423 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-21 16:48:29,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-11-21 16:48:29,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 403. [2022-11-21 16:48:29,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 401 states have (on average 1.14713216957606) internal successors, (460), 402 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:48:29,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 460 transitions. [2022-11-21 16:48:29,778 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 460 transitions. Word has length 73 [2022-11-21 16:48:29,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:48:29,778 INFO L495 AbstractCegarLoop]: Abstraction has 403 states and 460 transitions. [2022-11-21 16:48:29,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:48:29,779 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 460 transitions. [2022-11-21 16:48:29,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-21 16:48:29,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:48:29,780 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:48:29,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:48:29,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:48:29,999 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 16:48:29,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:48:29,999 INFO L85 PathProgramCache]: Analyzing trace with hash 348270194, now seen corresponding path program 9 times [2022-11-21 16:48:29,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:48:30,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [970889843] [2022-11-21 16:48:30,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:48:30,000 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 [2022-11-21 16:48:30,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:48:30,001 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:48:30,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:48:30,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-21 16:48:30,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:48:30,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-21 16:48:30,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:48:30,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-21 16:48:31,780 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-11-21 16:48:31,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:48:36,769 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 1 proven. 118 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-11-21 16:48:36,769 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:48:36,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [970889843] [2022-11-21 16:48:36,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [970889843] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:48:36,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:48:36,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2022-11-21 16:48:36,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341555441] [2022-11-21 16:48:36,770 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:48:36,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-21 16:48:36,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:48:36,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-21 16:48:36,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2022-11-21 16:48:36,771 INFO L87 Difference]: Start difference. First operand 403 states and 460 transitions. Second operand has 24 states, 23 states have (on average 3.130434782608696) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:02,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:49:02,199 INFO L93 Difference]: Finished difference Result 509 states and 581 transitions. [2022-11-21 16:49:02,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-21 16:49:02,201 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.130434782608696) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 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 77 [2022-11-21 16:49:02,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:49:02,203 INFO L225 Difference]: With dead ends: 509 [2022-11-21 16:49:02,203 INFO L226 Difference]: Without dead ends: 509 [2022-11-21 16:49:02,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1227 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=1024, Invalid=3008, Unknown=0, NotChecked=0, Total=4032 [2022-11-21 16:49:02,205 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1717 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1717 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:49:02,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1717 Valid, 244 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-11-21 16:49:02,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-11-21 16:49:02,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 340. [2022-11-21 16:49:02,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 338 states have (on average 1.1568047337278107) internal successors, (391), 339 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:02,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 391 transitions. [2022-11-21 16:49:02,213 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 391 transitions. Word has length 77 [2022-11-21 16:49:02,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:49:02,214 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 391 transitions. [2022-11-21 16:49:02,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.130434782608696) internal successors, (72), 24 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:02,214 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 391 transitions. [2022-11-21 16:49:02,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-21 16:49:02,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:49:02,216 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:49:02,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:49:02,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:49:02,429 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 16:49:02,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:49:02,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1702221328, now seen corresponding path program 5 times [2022-11-21 16:49:02,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:49:02,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [929225850] [2022-11-21 16:49:02,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:49:02,430 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 [2022-11-21 16:49:02,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:49:02,431 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:49:02,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:49:03,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-11-21 16:49:03,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:49:03,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-21 16:49:03,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:49:03,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-21 16:49:04,662 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 132 proven. 159 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-21 16:49:04,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:49:13,064 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 0 proven. 321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:49:13,065 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:49:13,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [929225850] [2022-11-21 16:49:13,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [929225850] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:49:13,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:49:13,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23] total 41 [2022-11-21 16:49:13,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91583697] [2022-11-21 16:49:13,065 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:49:13,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-21 16:49:13,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:49:13,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-21 16:49:13,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1447, Unknown=0, NotChecked=0, Total=1640 [2022-11-21 16:49:13,067 INFO L87 Difference]: Start difference. First operand 340 states and 391 transitions. Second operand has 41 states, 41 states have (on average 3.707317073170732) internal successors, (152), 41 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:42,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:49:42,764 INFO L93 Difference]: Finished difference Result 895 states and 1014 transitions. [2022-11-21 16:49:42,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-21 16:49:42,766 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.707317073170732) internal successors, (152), 41 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-11-21 16:49:42,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:49:42,768 INFO L225 Difference]: With dead ends: 895 [2022-11-21 16:49:42,768 INFO L226 Difference]: Without dead ends: 891 [2022-11-21 16:49:42,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1268 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=1086, Invalid=5234, Unknown=0, NotChecked=0, Total=6320 [2022-11-21 16:49:42,769 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 951 mSDsluCounter, 1178 mSDsCounter, 0 mSdLazyCounter, 2622 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 951 SdHoareTripleChecker+Valid, 1238 SdHoareTripleChecker+Invalid, 2652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2022-11-21 16:49:42,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [951 Valid, 1238 Invalid, 2652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2622 Invalid, 0 Unknown, 0 Unchecked, 15.4s Time] [2022-11-21 16:49:42,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2022-11-21 16:49:42,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 850. [2022-11-21 16:49:42,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 848 states have (on average 1.153301886792453) internal successors, (978), 849 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:42,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 978 transitions. [2022-11-21 16:49:42,785 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 978 transitions. Word has length 84 [2022-11-21 16:49:42,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:49:42,786 INFO L495 AbstractCegarLoop]: Abstraction has 850 states and 978 transitions. [2022-11-21 16:49:42,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.707317073170732) internal successors, (152), 41 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:49:42,786 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 978 transitions. [2022-11-21 16:49:42,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-21 16:49:42,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:49:42,788 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:49:42,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:49:43,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:49:43,005 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 16:49:43,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:49:43,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1987259542, now seen corresponding path program 6 times [2022-11-21 16:49:43,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:49:43,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1842225659] [2022-11-21 16:49:43,006 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:49:43,006 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 [2022-11-21 16:49:43,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:49:43,007 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:49:43,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:49:43,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-11-21 16:49:43,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:49:43,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-21 16:49:43,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:49:43,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-21 16:49:46,541 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 86 proven. 284 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 16:49:46,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:49:59,243 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 0 proven. 375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:49:59,244 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:49:59,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1842225659] [2022-11-21 16:49:59,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1842225659] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:49:59,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:49:59,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 27] total 50 [2022-11-21 16:49:59,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120193365] [2022-11-21 16:49:59,245 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:49:59,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-21 16:49:59,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:49:59,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-21 16:49:59,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=2149, Unknown=0, NotChecked=0, Total=2450 [2022-11-21 16:49:59,247 INFO L87 Difference]: Start difference. First operand 850 states and 978 transitions. Second operand has 50 states, 50 states have (on average 3.56) internal successors, (178), 50 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:50:22,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:50:44,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:51:02,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:51:02,408 INFO L93 Difference]: Finished difference Result 1415 states and 1594 transitions. [2022-11-21 16:51:02,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-11-21 16:51:02,408 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.56) internal successors, (178), 50 states have internal predecessors, (178), 0 states have call successors, (0), 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 92 [2022-11-21 16:51:02,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:51:02,410 INFO L225 Difference]: With dead ends: 1415 [2022-11-21 16:51:02,410 INFO L226 Difference]: Without dead ends: 1407 [2022-11-21 16:51:02,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5451 ImplicationChecksByTransitivity, 50.7s TimeCoverageRelationStatistics Valid=3813, Invalid=17067, Unknown=0, NotChecked=0, Total=20880 [2022-11-21 16:51:02,416 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 3092 mSDsluCounter, 2789 mSDsCounter, 0 mSdLazyCounter, 6410 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3092 SdHoareTripleChecker+Valid, 2926 SdHoareTripleChecker+Invalid, 6574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 6410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:51:02,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3092 Valid, 2926 Invalid, 6574 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [164 Valid, 6410 Invalid, 0 Unknown, 0 Unchecked, 22.2s Time] [2022-11-21 16:51:02,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2022-11-21 16:51:02,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1090. [2022-11-21 16:51:02,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1088 states have (on average 1.150735294117647) internal successors, (1252), 1089 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:51:02,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1252 transitions. [2022-11-21 16:51:02,436 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1252 transitions. Word has length 92 [2022-11-21 16:51:02,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:51:02,436 INFO L495 AbstractCegarLoop]: Abstraction has 1090 states and 1252 transitions. [2022-11-21 16:51:02,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.56) internal successors, (178), 50 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:51:02,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1252 transitions. [2022-11-21 16:51:02,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-21 16:51:02,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:51:02,439 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 1, 1, 1, 1, 1] [2022-11-21 16:51:02,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:51:02,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 16:51:02,647 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 16:51:02,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:51:02,647 INFO L85 PathProgramCache]: Analyzing trace with hash 2084926986, now seen corresponding path program 4 times [2022-11-21 16:51:02,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 16:51:02,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1694961580] [2022-11-21 16:51:02,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:51:02,648 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 [2022-11-21 16:51:02,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 16:51:02,649 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 16:51:02,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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 [2022-11-21 16:51:02,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:51:02,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:51:02,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-21 16:51:02,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:51:02,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-21 16:51:05,843 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:51:05,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:51:21,820 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:51:21,820 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 16:51:21,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1694961580] [2022-11-21 16:51:21,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1694961580] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:51:21,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:51:21,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 57 [2022-11-21 16:51:21,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496790332] [2022-11-21 16:51:21,821 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:51:21,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-21 16:51:21,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 16:51:21,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-21 16:51:21,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=854, Invalid=2452, Unknown=0, NotChecked=0, Total=3306 [2022-11-21 16:51:21,823 INFO L87 Difference]: Start difference. First operand 1090 states and 1252 transitions. Second operand has 58 states, 57 states have (on average 3.263157894736842) internal successors, (186), 58 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:51:48,136 WARN L233 SmtUtils]: Spent 14.87s on a formula simplification that was a NOOP. DAG size: 256 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:52:24,488 WARN L233 SmtUtils]: Spent 34.35s on a formula simplification. DAG size of input: 252 DAG size of output: 252 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:52:26,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:52:28,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:52:30,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:52:41,852 WARN L233 SmtUtils]: Spent 9.03s on a formula simplification that was a NOOP. DAG size: 246 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:53:22,438 WARN L233 SmtUtils]: Spent 38.18s on a formula simplification. DAG size of input: 241 DAG size of output: 241 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:53:25,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:53:27,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:53:29,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:53:42,395 WARN L233 SmtUtils]: Spent 11.20s on a formula simplification that was a NOOP. DAG size: 235 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:54:16,670 WARN L233 SmtUtils]: Spent 31.45s on a formula simplification. DAG size of input: 230 DAG size of output: 230 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:54:19,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:54:21,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:54:23,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:54:35,578 WARN L233 SmtUtils]: Spent 10.14s on a formula simplification that was a NOOP. DAG size: 225 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:55:04,997 WARN L233 SmtUtils]: Spent 26.74s on a formula simplification. DAG size of input: 220 DAG size of output: 220 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:55:08,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:55:10,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:55:12,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:55:24,995 WARN L233 SmtUtils]: Spent 10.80s on a formula simplification that was a NOOP. DAG size: 214 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:55:56,489 WARN L233 SmtUtils]: Spent 29.18s on a formula simplification. DAG size of input: 209 DAG size of output: 209 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:55:59,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:56:01,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:56:03,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:56:16,587 WARN L233 SmtUtils]: Spent 11.44s on a formula simplification that was a NOOP. DAG size: 203 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:56:38,843 WARN L233 SmtUtils]: Spent 19.83s on a formula simplification. DAG size of input: 198 DAG size of output: 198 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:56:41,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:56:43,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:56:45,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:56:52,709 WARN L233 SmtUtils]: Spent 5.53s on a formula simplification that was a NOOP. DAG size: 192 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:57:15,100 WARN L233 SmtUtils]: Spent 19.86s on a formula simplification. DAG size of input: 187 DAG size of output: 187 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:57:17,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:57:19,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:57:21,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:57:31,789 WARN L233 SmtUtils]: Spent 8.00s on a formula simplification that was a NOOP. DAG size: 182 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:57:49,682 WARN L233 SmtUtils]: Spent 15.62s on a formula simplification. DAG size of input: 177 DAG size of output: 177 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:57:52,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:57:54,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:57:56,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:58:03,615 WARN L233 SmtUtils]: Spent 5.55s on a formula simplification that was a NOOP. DAG size: 171 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:58:18,169 WARN L233 SmtUtils]: Spent 12.20s on a formula simplification. DAG size of input: 166 DAG size of output: 166 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:58:20,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:58:22,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:58:24,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:58:40,357 WARN L233 SmtUtils]: Spent 8.33s on a formula simplification. DAG size of input: 155 DAG size of output: 155 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:58:42,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:58:44,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:58:59,632 WARN L233 SmtUtils]: Spent 7.25s on a formula simplification. DAG size of input: 144 DAG size of output: 144 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:59:02,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:59:04,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:59:16,315 WARN L233 SmtUtils]: Spent 5.41s on a formula simplification. DAG size of input: 134 DAG size of output: 134 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:59:18,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:59:20,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:59:31,704 WARN L233 SmtUtils]: Spent 5.60s on a formula simplification. DAG size of input: 123 DAG size of output: 123 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:59:34,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-21 16:59:36,159 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 [] [2022-11-21 17:00:23,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:00:23,564 INFO L93 Difference]: Finished difference Result 10099 states and 11527 transitions. [2022-11-21 17:00:23,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-11-21 17:00:23,566 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 3.263157894736842) internal successors, (186), 58 states have internal predecessors, (186), 0 states have call successors, (0), 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 94 [2022-11-21 17:00:23,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:00:23,585 INFO L225 Difference]: With dead ends: 10099 [2022-11-21 17:00:23,585 INFO L226 Difference]: Without dead ends: 10099 [2022-11-21 17:00:23,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4087 ImplicationChecksByTransitivity, 460.8s TimeCoverageRelationStatistics Valid=4684, Invalid=10568, Unknown=0, NotChecked=0, Total=15252 [2022-11-21 17:00:23,586 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 10468 mSDsluCounter, 4533 mSDsCounter, 0 mSdLazyCounter, 6008 mSolverCounterSat, 175 mSolverCounterUnsat, 34 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 90.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10468 SdHoareTripleChecker+Valid, 4713 SdHoareTripleChecker+Invalid, 6217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 6008 IncrementalHoareTripleChecker+Invalid, 34 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 93.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:00:23,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10468 Valid, 4713 Invalid, 6217 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [175 Valid, 6008 Invalid, 34 Unknown, 0 Unchecked, 93.1s Time] [2022-11-21 17:00:23,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10099 states. [2022-11-21 17:00:23,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10099 to 1186. [2022-11-21 17:00:23,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1186 states, 1184 states have (on average 1.1587837837837838) internal successors, (1372), 1185 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:00:23,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1186 states to 1186 states and 1372 transitions. [2022-11-21 17:00:23,657 INFO L78 Accepts]: Start accepts. Automaton has 1186 states and 1372 transitions. Word has length 94 [2022-11-21 17:00:23,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:00:23,657 INFO L495 AbstractCegarLoop]: Abstraction has 1186 states and 1372 transitions. [2022-11-21 17:00:23,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 3.263157894736842) internal successors, (186), 58 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:00:23,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1186 states and 1372 transitions. [2022-11-21 17:00:23,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-21 17:00:23,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:00:23,660 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 6, 6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:00:23,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-21 17:00:23,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:00:23,874 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 17:00:23,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:00:23,874 INFO L85 PathProgramCache]: Analyzing trace with hash 647922256, now seen corresponding path program 10 times [2022-11-21 17:00:23,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:00:23,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [540627282] [2022-11-21 17:00:23,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 17:00:23,875 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 [2022-11-21 17:00:23,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:00:23,876 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 17:00:23,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-21 17:00:24,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 17:00:24,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:00:24,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-21 17:00:24,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:00:24,809 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 188 proven. 100 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-11-21 17:00:24,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:00:26,408 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 209 proven. 79 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-11-21 17:00:26,408 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-21 17:00:26,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [540627282] [2022-11-21 17:00:26,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [540627282] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:00:26,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:00:26,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-11-21 17:00:26,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830834213] [2022-11-21 17:00:26,409 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:00:26,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-21 17:00:26,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-21 17:00:26,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-21 17:00:26,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2022-11-21 17:00:26,410 INFO L87 Difference]: Start difference. First operand 1186 states and 1372 transitions. Second operand has 30 states, 30 states have (on average 3.7) internal successors, (111), 30 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:00:29,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:00:29,424 INFO L93 Difference]: Finished difference Result 1187 states and 1368 transitions. [2022-11-21 17:00:29,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-21 17:00:29,425 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.7) internal successors, (111), 30 states have internal predecessors, (111), 0 states have call successors, (0), 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 100 [2022-11-21 17:00:29,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:00:29,431 INFO L225 Difference]: With dead ends: 1187 [2022-11-21 17:00:29,431 INFO L226 Difference]: Without dead ends: 1187 [2022-11-21 17:00:29,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=340, Invalid=1382, Unknown=0, NotChecked=0, Total=1722 [2022-11-21 17:00:29,432 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 729 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:00:29,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [729 Valid, 354 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-21 17:00:29,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2022-11-21 17:00:29,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 1186. [2022-11-21 17:00:29,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1186 states, 1184 states have (on average 1.1554054054054055) internal successors, (1368), 1185 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:00:29,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1186 states to 1186 states and 1368 transitions. [2022-11-21 17:00:29,451 INFO L78 Accepts]: Start accepts. Automaton has 1186 states and 1368 transitions. Word has length 100 [2022-11-21 17:00:29,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:00:29,451 INFO L495 AbstractCegarLoop]: Abstraction has 1186 states and 1368 transitions. [2022-11-21 17:00:29,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.7) internal successors, (111), 30 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:00:29,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1186 states and 1368 transitions. [2022-11-21 17:00:29,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-21 17:00:29,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:00:29,454 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:00:29,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-21 17:00:29,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-21 17:00:29,668 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-21 17:00:29,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:00:29,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1128326153, now seen corresponding path program 7 times [2022-11-21 17:00:29,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-21 17:00:29,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1112624357] [2022-11-21 17:00:29,669 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 17:00:29,670 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 [2022-11-21 17:00:29,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat [2022-11-21 17:00:29,672 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -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) [2022-11-21 17:00:29,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4235123a-429e-409b-8a94-a135f9d522f7/bin/uautomizer-vX5HgA9Q3a/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-21 17:00:29,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:00:29,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-21 17:00:29,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:00:29,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-21 17:00:32,999 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 53 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:00:33,000 INFO L328 TraceCheckSpWp]: Computing backward predicates...