./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/array03-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/array03-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0 --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 00a8f866e26c2e2f6efeb25e7ec6952d97cdca88cd5ba8f7afdfeeef8678b95c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 16:16:56,743 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 16:16:56,745 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 16:16:56,814 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 16:16:56,815 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 16:16:56,821 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 16:16:56,823 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 16:16:56,828 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 16:16:56,832 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 16:16:56,839 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 16:16:56,841 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 16:16:56,843 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 16:16:56,844 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 16:16:56,847 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 16:16:56,850 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 16:16:56,855 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 16:16:56,858 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 16:16:56,860 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 16:16:56,863 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 16:16:56,874 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 16:16:56,876 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 16:16:56,878 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 16:16:56,882 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 16:16:56,884 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 16:16:56,896 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 16:16:56,896 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 16:16:56,897 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 16:16:56,899 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 16:16:56,900 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 16:16:56,902 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 16:16:56,903 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 16:16:56,904 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 16:16:56,907 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 16:16:56,908 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 16:16:56,911 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 16:16:56,911 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 16:16:56,912 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 16:16:56,912 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 16:16:56,913 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 16:16:56,914 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 16:16:56,915 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 16:16:56,916 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-22 16:16:56,975 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 16:16:56,975 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 16:16:56,976 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 16:16:56,977 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 16:16:56,986 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 16:16:56,987 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 16:16:56,987 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 16:16:56,987 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 16:16:56,988 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 16:16:56,988 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-22 16:16:56,989 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 16:16:56,990 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 16:16:56,990 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 16:16:56,990 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-22 16:16:56,991 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-22 16:16:56,991 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-22 16:16:56,991 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 16:16:56,992 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-22 16:16:56,992 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 16:16:56,992 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 16:16:56,993 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 16:16:56,993 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 16:16:56,993 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 16:16:56,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:16:56,994 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 16:16:56,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 16:16:56,995 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 16:16:56,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 16:16:56,995 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 16:16:56,995 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_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00a8f866e26c2e2f6efeb25e7ec6952d97cdca88cd5ba8f7afdfeeef8678b95c [2021-11-22 16:16:57,360 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 16:16:57,388 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 16:16:57,391 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 16:16:57,393 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 16:16:57,394 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 16:16:57,396 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/array-memsafety/array03-alloca-2.i [2021-11-22 16:16:57,486 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/data/f79a33558/21180f978e454376881e8b224a666f4d/FLAG8247d7c1c [2021-11-22 16:16:58,118 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 16:16:58,118 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/sv-benchmarks/c/array-memsafety/array03-alloca-2.i [2021-11-22 16:16:58,138 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/data/f79a33558/21180f978e454376881e8b224a666f4d/FLAG8247d7c1c [2021-11-22 16:16:58,436 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/data/f79a33558/21180f978e454376881e8b224a666f4d [2021-11-22 16:16:58,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 16:16:58,443 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 16:16:58,447 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 16:16:58,448 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 16:16:58,452 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 16:16:58,453 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:16:58" (1/1) ... [2021-11-22 16:16:58,456 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@721f7f71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:58, skipping insertion in model container [2021-11-22 16:16:58,457 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:16:58" (1/1) ... [2021-11-22 16:16:58,467 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 16:16:58,537 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 16:16:59,055 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:16:59,072 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-22 16:16:59,073 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7f0c766a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:16:59, skipping insertion in model container [2021-11-22 16:16:59,074 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 16:16:59,075 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-22 16:16:59,079 INFO L158 Benchmark]: Toolchain (without parser) took 633.81ms. Allocated memory was 107.0MB in the beginning and 138.4MB in the end (delta: 31.5MB). Free memory was 76.1MB in the beginning and 111.2MB in the end (delta: -35.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-22 16:16:59,081 INFO L158 Benchmark]: CDTParser took 0.41ms. Allocated memory is still 107.0MB. Free memory was 59.8MB in the beginning and 59.7MB in the end (delta: 92.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 16:16:59,084 INFO L158 Benchmark]: CACSL2BoogieTranslator took 628.11ms. Allocated memory was 107.0MB in the beginning and 138.4MB in the end (delta: 31.5MB). Free memory was 75.6MB in the beginning and 111.2MB in the end (delta: -35.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-22 16:16:59,088 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41ms. Allocated memory is still 107.0MB. Free memory was 59.8MB in the beginning and 59.7MB in the end (delta: 92.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 628.11ms. Allocated memory was 107.0MB in the beginning and 138.4MB in the end (delta: 31.5MB). Free memory was 75.6MB in the beginning and 111.2MB in the end (delta: -35.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 535]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type 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/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/array03-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0 --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 00a8f866e26c2e2f6efeb25e7ec6952d97cdca88cd5ba8f7afdfeeef8678b95c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 16:17:01,987 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 16:17:01,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 16:17:02,059 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 16:17:02,060 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 16:17:02,065 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 16:17:02,068 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 16:17:02,076 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 16:17:02,080 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 16:17:02,087 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 16:17:02,089 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 16:17:02,092 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 16:17:02,092 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 16:17:02,096 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 16:17:02,098 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 16:17:02,104 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 16:17:02,107 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 16:17:02,108 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 16:17:02,111 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 16:17:02,122 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 16:17:02,125 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 16:17:02,127 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 16:17:02,131 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 16:17:02,134 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 16:17:02,145 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 16:17:02,146 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 16:17:02,147 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 16:17:02,150 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 16:17:02,150 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 16:17:02,152 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 16:17:02,152 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 16:17:02,154 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 16:17:02,156 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 16:17:02,157 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 16:17:02,160 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 16:17:02,160 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 16:17:02,162 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 16:17:02,162 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 16:17:02,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 16:17:02,165 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 16:17:02,166 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 16:17:02,172 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-22 16:17:02,230 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 16:17:02,230 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 16:17:02,231 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 16:17:02,231 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 16:17:02,234 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 16:17:02,234 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 16:17:02,235 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 16:17:02,235 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 16:17:02,235 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 16:17:02,236 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-22 16:17:02,237 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 16:17:02,238 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 16:17:02,238 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 16:17:02,238 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-22 16:17:02,239 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-22 16:17:02,239 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-22 16:17:02,239 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 16:17:02,240 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-22 16:17:02,240 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-22 16:17:02,240 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-22 16:17:02,240 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 16:17:02,241 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 16:17:02,241 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 16:17:02,241 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 16:17:02,242 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 16:17:02,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:17:02,243 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 16:17:02,243 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 16:17:02,243 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-22 16:17:02,244 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-22 16:17:02,244 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 16:17:02,244 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-22 16:17:02,245 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_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00a8f866e26c2e2f6efeb25e7ec6952d97cdca88cd5ba8f7afdfeeef8678b95c [2021-11-22 16:17:02,770 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 16:17:02,800 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 16:17:02,804 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 16:17:02,806 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 16:17:02,807 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 16:17:02,812 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/array-memsafety/array03-alloca-2.i [2021-11-22 16:17:02,896 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/data/e7814800f/2bf0229ab4e1488eab6e6c52a0e85fc2/FLAG21f11a039 [2021-11-22 16:17:03,730 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 16:17:03,732 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/sv-benchmarks/c/array-memsafety/array03-alloca-2.i [2021-11-22 16:17:03,755 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/data/e7814800f/2bf0229ab4e1488eab6e6c52a0e85fc2/FLAG21f11a039 [2021-11-22 16:17:03,981 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/data/e7814800f/2bf0229ab4e1488eab6e6c52a0e85fc2 [2021-11-22 16:17:03,984 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 16:17:03,986 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 16:17:03,990 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 16:17:03,991 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 16:17:03,995 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 16:17:03,997 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:17:03" (1/1) ... [2021-11-22 16:17:03,998 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fb69f32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:17:03, skipping insertion in model container [2021-11-22 16:17:03,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:17:03" (1/1) ... [2021-11-22 16:17:04,007 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 16:17:04,078 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 16:17:04,638 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:17:04,657 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-22 16:17:04,675 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 16:17:04,743 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:17:04,755 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 16:17:04,829 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:17:04,868 INFO L208 MainTranslator]: Completed translation [2021-11-22 16:17:04,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:17:04 WrapperNode [2021-11-22 16:17:04,869 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 16:17:04,870 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 16:17:04,871 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 16:17:04,871 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 16:17:04,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:17:04" (1/1) ... [2021-11-22 16:17:04,905 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:17:04" (1/1) ... [2021-11-22 16:17:04,934 INFO L137 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2021-11-22 16:17:04,935 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 16:17:04,936 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 16:17:04,936 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 16:17:04,936 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 16:17:04,947 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:17:04" (1/1) ... [2021-11-22 16:17:04,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:17:04" (1/1) ... [2021-11-22 16:17:04,954 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:17:04" (1/1) ... [2021-11-22 16:17:04,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:17:04" (1/1) ... [2021-11-22 16:17:04,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:17:04" (1/1) ... [2021-11-22 16:17:04,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:17:04" (1/1) ... [2021-11-22 16:17:04,973 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:17:04" (1/1) ... [2021-11-22 16:17:04,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 16:17:04,979 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 16:17:04,979 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 16:17:04,979 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 16:17:04,980 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:17:04" (1/1) ... [2021-11-22 16:17:05,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:17:05,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:17:05,060 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 16:17:05,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 16:17:05,135 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-22 16:17:05,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-22 16:17:05,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 16:17:05,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-22 16:17:05,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 16:17:05,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 16:17:05,331 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 16:17:05,333 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 16:17:05,919 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 16:17:05,927 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 16:17:05,938 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-22 16:17:05,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:17:05 BoogieIcfgContainer [2021-11-22 16:17:05,941 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 16:17:05,944 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 16:17:05,944 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 16:17:05,948 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 16:17:05,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 04:17:03" (1/3) ... [2021-11-22 16:17:05,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f6cb3d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:17:05, skipping insertion in model container [2021-11-22 16:17:05,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:17:04" (2/3) ... [2021-11-22 16:17:05,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f6cb3d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:17:05, skipping insertion in model container [2021-11-22 16:17:05,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:17:05" (3/3) ... [2021-11-22 16:17:05,954 INFO L111 eAbstractionObserver]: Analyzing ICFG array03-alloca-2.i [2021-11-22 16:17:05,962 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 16:17:05,963 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2021-11-22 16:17:06,033 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 16:17:06,049 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-22 16:17:06,050 INFO L340 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2021-11-22 16:17:06,072 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 27 states have (on average 1.962962962962963) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:17:06,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-22 16:17:06,081 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:17:06,082 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-22 16:17:06,082 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-22 16:17:06,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:17:06,090 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-11-22 16:17:06,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:17:06,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1687306306] [2021-11-22 16:17:06,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:17:06,128 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:17:06,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:17:06,133 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:17:06,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-22 16:17:06,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:17:06,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 16:17:06,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:17:06,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-22 16:17:06,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:17:06,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:17:06,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:17:06,460 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:17:06,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1687306306] [2021-11-22 16:17:06,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1687306306] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:17:06,462 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:17:06,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-22 16:17:06,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033709480] [2021-11-22 16:17:06,466 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:17:06,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:17:06,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:17:06,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:17:06,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:17:06,528 INFO L87 Difference]: Start difference. First operand has 45 states, 27 states have (on average 1.962962962962963) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 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) [2021-11-22 16:17:06,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:17:06,707 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-11-22 16:17:06,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:17:06,710 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 [2021-11-22 16:17:06,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:17:06,722 INFO L225 Difference]: With dead ends: 44 [2021-11-22 16:17:06,723 INFO L226 Difference]: Without dead ends: 42 [2021-11-22 16:17:06,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:17:06,730 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 39 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:17:06,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 34 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 16:17:06,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-22 16:17:06,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-11-22 16:17:06,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:17:06,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-11-22 16:17:06,789 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 6 [2021-11-22 16:17:06,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:17:06,790 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-11-22 16:17:06,791 INFO L471 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) [2021-11-22 16:17:06,791 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-11-22 16:17:06,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-22 16:17:06,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:17:06,792 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-22 16:17:06,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-22 16:17:07,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:17:07,018 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-22 16:17:07,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:17:07,019 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2021-11-22 16:17:07,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:17:07,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1748894751] [2021-11-22 16:17:07,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:17:07,021 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:17:07,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:17:07,023 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:17:07,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-22 16:17:07,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:17:07,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-22 16:17:07,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:17:07,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-22 16:17:07,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:17:07,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:17:07,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:17:07,429 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:17:07,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1748894751] [2021-11-22 16:17:07,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1748894751] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:17:07,432 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:17:07,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-22 16:17:07,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930601516] [2021-11-22 16:17:07,434 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:17:07,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 16:17:07,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:17:07,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 16:17:07,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:17:07,438 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:17:08,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:17:08,819 INFO L93 Difference]: Finished difference Result 120 states and 133 transitions. [2021-11-22 16:17:08,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 16:17:08,821 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 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 [2021-11-22 16:17:08,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:17:08,824 INFO L225 Difference]: With dead ends: 120 [2021-11-22 16:17:08,825 INFO L226 Difference]: Without dead ends: 120 [2021-11-22 16:17:08,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-22 16:17:08,827 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 211 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:17:08,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 157 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-22 16:17:08,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-22 16:17:08,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 46. [2021-11-22 16:17:08,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 45 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) [2021-11-22 16:17:08,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-11-22 16:17:08,841 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 6 [2021-11-22 16:17:08,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:17:08,841 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-11-22 16:17:08,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:17:08,842 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-11-22 16:17:08,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-22 16:17:08,843 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:17:08,843 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:17:08,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-22 16:17:09,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:17:09,060 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-22 16:17:09,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:17:09,061 INFO L85 PathProgramCache]: Analyzing trace with hash 176742579, now seen corresponding path program 1 times [2021-11-22 16:17:09,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:17:09,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888386246] [2021-11-22 16:17:09,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:17:09,067 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:17:09,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:17:09,069 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:17:09,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-22 16:17:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:17:09,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-22 16:17:09,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:17:09,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-22 16:17:09,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:17:09,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:17:09,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:17:09,272 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:17:09,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888386246] [2021-11-22 16:17:09,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888386246] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:17:09,273 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:17:09,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-22 16:17:09,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986182204] [2021-11-22 16:17:09,274 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:17:09,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:17:09,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:17:09,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:17:09,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:17:09,276 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:17:09,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:17:09,511 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-11-22 16:17:09,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:17:09,512 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-11-22 16:17:09,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:17:09,513 INFO L225 Difference]: With dead ends: 39 [2021-11-22 16:17:09,513 INFO L226 Difference]: Without dead ends: 39 [2021-11-22 16:17:09,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:17:09,515 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 57 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:17:09,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 30 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 16:17:09,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-22 16:17:09,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-22 16:17:09,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.5) internal successors, (45), 38 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) [2021-11-22 16:17:09,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-11-22 16:17:09,523 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 8 [2021-11-22 16:17:09,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:17:09,523 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-11-22 16:17:09,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:17:09,524 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-11-22 16:17:09,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-22 16:17:09,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:17:09,525 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:17:09,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-22 16:17:09,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:17:09,738 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-22 16:17:09,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:17:09,739 INFO L85 PathProgramCache]: Analyzing trace with hash 176742580, now seen corresponding path program 1 times [2021-11-22 16:17:09,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:17:09,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1018584717] [2021-11-22 16:17:09,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:17:09,740 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:17:09,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:17:09,744 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:17:09,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-22 16:17:09,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:17:09,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-22 16:17:09,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:17:09,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-22 16:17:09,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:17:09,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:17:10,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:17:10,496 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:17:10,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1018584717] [2021-11-22 16:17:10,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1018584717] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:17:10,502 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:17:10,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 8 [2021-11-22 16:17:10,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047427598] [2021-11-22 16:17:10,502 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:17:10,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 16:17:10,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:17:10,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 16:17:10,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-22 16:17:10,506 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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) [2021-11-22 16:17:11,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:17:11,168 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-11-22 16:17:11,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 16:17:11,169 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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 8 [2021-11-22 16:17:11,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:17:11,170 INFO L225 Difference]: With dead ends: 40 [2021-11-22 16:17:11,170 INFO L226 Difference]: Without dead ends: 40 [2021-11-22 16:17:11,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-22 16:17:11,172 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 126 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 16:17:11,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 40 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-22 16:17:11,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-22 16:17:11,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2021-11-22 16:17:11,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 30 states have (on average 1.3) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:17:11,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2021-11-22 16:17:11,180 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 8 [2021-11-22 16:17:11,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:17:11,180 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2021-11-22 16:17:11,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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) [2021-11-22 16:17:11,181 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2021-11-22 16:17:11,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-22 16:17:11,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:17:11,182 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:17:11,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-22 16:17:11,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:17:11,394 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-22 16:17:11,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:17:11,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2021-11-22 16:17:11,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:17:11,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [64248725] [2021-11-22 16:17:11,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:17:11,396 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:17:11,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:17:11,397 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:17:11,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-22 16:17:11,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:17:11,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 16:17:11,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:17:11,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:17:11,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:17:11,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:17:11,633 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:17:11,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [64248725] [2021-11-22 16:17:11,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [64248725] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:17:11,633 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:17:11,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-22 16:17:11,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626095403] [2021-11-22 16:17:11,634 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:17:11,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 16:17:11,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:17:11,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 16:17:11,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-22 16:17:11,636 INFO L87 Difference]: Start difference. First operand 33 states and 39 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) [2021-11-22 16:17:11,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:17:11,722 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2021-11-22 16:17:11,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 16:17:11,723 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 [2021-11-22 16:17:11,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:17:11,724 INFO L225 Difference]: With dead ends: 61 [2021-11-22 16:17:11,724 INFO L226 Difference]: Without dead ends: 61 [2021-11-22 16:17:11,725 INFO L932 BasicCegarLoop]: 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 [2021-11-22 16:17:11,726 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 123 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:17:11,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 130 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:17:11,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-22 16:17:11,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 39. [2021-11-22 16:17:11,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 36 states have (on average 1.25) internal successors, (45), 38 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) [2021-11-22 16:17:11,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-11-22 16:17:11,735 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 10 [2021-11-22 16:17:11,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:17:11,735 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-11-22 16:17:11,735 INFO L471 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) [2021-11-22 16:17:11,736 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-11-22 16:17:11,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-22 16:17:11,736 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:17:11,737 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:17:11,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-22 16:17:11,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:17:11,950 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-22 16:17:11,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:17:11,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-11-22 16:17:11,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:17:11,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [602187192] [2021-11-22 16:17:11,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:17:11,952 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:17:11,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:17:11,953 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:17:11,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-22 16:17:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:17:11,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-22 16:17:11,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:17:12,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-22 16:17:12,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:17:12,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:17:13,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:17:13,169 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:17:13,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [602187192] [2021-11-22 16:17:13,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [602187192] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:17:13,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:17:13,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-11-22 16:17:13,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930656538] [2021-11-22 16:17:13,170 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:17:13,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-22 16:17:13,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:17:13,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-22 16:17:13,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-22 16:17:13,172 INFO L87 Difference]: Start difference. First operand 39 states and 45 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) [2021-11-22 16:17:13,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:17:13,819 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2021-11-22 16:17:13,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 16:17:13,827 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 [2021-11-22 16:17:13,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:17:13,828 INFO L225 Difference]: With dead ends: 69 [2021-11-22 16:17:13,828 INFO L226 Difference]: Without dead ends: 69 [2021-11-22 16:17:13,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-22 16:17:13,830 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 138 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-22 16:17:13,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 71 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 65 Invalid, 0 Unknown, 4 Unchecked, 0.6s Time] [2021-11-22 16:17:13,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-22 16:17:13,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 47. [2021-11-22 16:17:13,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 1.25) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:17:13,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-11-22 16:17:13,837 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 10 [2021-11-22 16:17:13,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:17:13,838 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-11-22 16:17:13,838 INFO L471 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) [2021-11-22 16:17:13,839 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-11-22 16:17:13,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-22 16:17:13,839 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:17:13,840 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:17:13,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-22 16:17:14,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:17:14,042 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-22 16:17:14,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:17:14,043 INFO L85 PathProgramCache]: Analyzing trace with hash 363893485, now seen corresponding path program 1 times [2021-11-22 16:17:14,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:17:14,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1991016300] [2021-11-22 16:17:14,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:17:14,044 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:17:14,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:17:14,045 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:17:14,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-22 16:17:14,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:17:14,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-22 16:17:14,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:17:14,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:17:14,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:17:14,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:17:14,231 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:17:14,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1991016300] [2021-11-22 16:17:14,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1991016300] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:17:14,233 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:17:14,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-22 16:17:14,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853565606] [2021-11-22 16:17:14,234 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:17:14,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 16:17:14,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:17:14,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 16:17:14,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:17:14,237 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:17:14,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:17:14,511 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2021-11-22 16:17:14,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 16:17:14,513 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 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 [2021-11-22 16:17:14,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:17:14,514 INFO L225 Difference]: With dead ends: 82 [2021-11-22 16:17:14,514 INFO L226 Difference]: Without dead ends: 82 [2021-11-22 16:17:14,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-22 16:17:14,516 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 116 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:17:14,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 66 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 16:17:14,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-22 16:17:14,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 47. [2021-11-22 16:17:14,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 46 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) [2021-11-22 16:17:14,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-11-22 16:17:14,524 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 13 [2021-11-22 16:17:14,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:17:14,525 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-11-22 16:17:14,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:17:14,526 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-11-22 16:17:14,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-22 16:17:14,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:17:14,527 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1] [2021-11-22 16:17:14,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-22 16:17:14,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:17:14,747 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-22 16:17:14,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:17:14,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1817992175, now seen corresponding path program 2 times [2021-11-22 16:17:14,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:17:14,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [690164259] [2021-11-22 16:17:14,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 16:17:14,749 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:17:14,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:17:14,750 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:17:14,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-22 16:17:14,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 16:17:14,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:17:14,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-22 16:17:14,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:17:14,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-22 16:17:15,471 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:17:15,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:17:16,969 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:17:16,969 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:17:16,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [690164259] [2021-11-22 16:17:16,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [690164259] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:17:16,970 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:17:16,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-11-22 16:17:16,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536834841] [2021-11-22 16:17:16,971 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:17:16,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-22 16:17:16,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:17:16,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-22 16:17:16,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-11-22 16:17:16,973 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 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) [2021-11-22 16:17:20,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:17:20,602 INFO L93 Difference]: Finished difference Result 173 states and 199 transitions. [2021-11-22 16:17:20,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-22 16:17:20,605 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 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 [2021-11-22 16:17:20,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:17:20,607 INFO L225 Difference]: With dead ends: 173 [2021-11-22 16:17:20,607 INFO L226 Difference]: Without dead ends: 173 [2021-11-22 16:17:20,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2021-11-22 16:17:20,609 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 586 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-22 16:17:20,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [586 Valid, 302 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 267 Invalid, 0 Unknown, 12 Unchecked, 1.9s Time] [2021-11-22 16:17:20,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-22 16:17:20,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 63. [2021-11-22 16:17:20,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 60 states have (on average 1.2333333333333334) internal successors, (74), 62 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:17:20,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2021-11-22 16:17:20,620 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 18 [2021-11-22 16:17:20,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:17:20,621 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2021-11-22 16:17:20,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 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) [2021-11-22 16:17:20,621 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2021-11-22 16:17:20,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-22 16:17:20,623 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:17:20,623 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:17:20,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-22 16:17:20,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:17:20,833 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-22 16:17:20,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:17:20,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1194451038, now seen corresponding path program 1 times [2021-11-22 16:17:20,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:17:20,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1738149719] [2021-11-22 16:17:20,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:17:20,835 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:17:20,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:17:20,836 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:17:20,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-22 16:17:20,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:17:20,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 16:17:20,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:17:21,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:17:21,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:17:21,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:17:21,145 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:17:21,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1738149719] [2021-11-22 16:17:21,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1738149719] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:17:21,145 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:17:21,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-22 16:17:21,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603344247] [2021-11-22 16:17:21,146 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:17:21,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 16:17:21,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:17:21,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 16:17:21,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-22 16:17:21,147 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:17:21,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:17:21,340 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2021-11-22 16:17:21,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 16:17:21,342 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 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 [2021-11-22 16:17:21,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:17:21,343 INFO L225 Difference]: With dead ends: 83 [2021-11-22 16:17:21,343 INFO L226 Difference]: Without dead ends: 83 [2021-11-22 16:17:21,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-22 16:17:21,344 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 72 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:17:21,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 94 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 16:17:21,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-22 16:17:21,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2021-11-22 16:17:21,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 77 states have (on average 1.2207792207792207) internal successors, (94), 79 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:17:21,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 94 transitions. [2021-11-22 16:17:21,355 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 94 transitions. Word has length 19 [2021-11-22 16:17:21,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:17:21,356 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 94 transitions. [2021-11-22 16:17:21,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:17:21,356 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 94 transitions. [2021-11-22 16:17:21,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-22 16:17:21,358 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:17:21,358 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:17:21,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-22 16:17:21,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:17:21,598 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-22 16:17:21,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:17:21,598 INFO L85 PathProgramCache]: Analyzing trace with hash -393896864, now seen corresponding path program 1 times [2021-11-22 16:17:21,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:17:21,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [783816625] [2021-11-22 16:17:21,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:17:21,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:17:21,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:17:21,614 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:17:21,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-22 16:17:21,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:17:21,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-22 16:17:21,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:17:21,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-22 16:17:22,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:17:22,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:17:23,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:17:23,423 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:17:23,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [783816625] [2021-11-22 16:17:23,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [783816625] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:17:23,424 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:17:23,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-11-22 16:17:23,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223043731] [2021-11-22 16:17:23,424 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:17:23,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-22 16:17:23,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:17:23,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-22 16:17:23,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-22 16:17:23,426 INFO L87 Difference]: Start difference. First operand 80 states and 94 transitions. Second operand has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 12 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) [2021-11-22 16:17:24,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:17:24,736 INFO L93 Difference]: Finished difference Result 117 states and 139 transitions. [2021-11-22 16:17:24,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-22 16:17:24,737 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 12 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 [2021-11-22 16:17:24,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:17:24,738 INFO L225 Difference]: With dead ends: 117 [2021-11-22 16:17:24,739 INFO L226 Difference]: Without dead ends: 117 [2021-11-22 16:17:24,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-11-22 16:17:24,740 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 153 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-22 16:17:24,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 128 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 110 Invalid, 0 Unknown, 27 Unchecked, 0.8s Time] [2021-11-22 16:17:24,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-22 16:17:24,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 110. [2021-11-22 16:17:24,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 107 states have (on average 1.233644859813084) internal successors, (132), 109 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:17:24,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 132 transitions. [2021-11-22 16:17:24,756 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 132 transitions. Word has length 19 [2021-11-22 16:17:24,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:17:24,756 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 132 transitions. [2021-11-22 16:17:24,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 12 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) [2021-11-22 16:17:24,757 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 132 transitions. [2021-11-22 16:17:24,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-22 16:17:24,758 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:17:24,759 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:17:24,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-22 16:17:24,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:17:24,970 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-22 16:17:24,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:17:24,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1626723800, now seen corresponding path program 1 times [2021-11-22 16:17:24,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:17:24,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1917003157] [2021-11-22 16:17:24,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:17:24,971 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:17:24,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:17:24,972 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:17:24,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-22 16:17:25,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:17:25,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-22 16:17:25,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:17:25,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 16:17:25,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:17:31,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 16:17:31,376 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:17:31,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1917003157] [2021-11-22 16:17:31,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1917003157] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:17:31,377 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:17:31,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-22 16:17:31,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977222024] [2021-11-22 16:17:31,377 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:17:31,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 16:17:31,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:17:31,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 16:17:31,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=24, Unknown=3, NotChecked=0, Total=42 [2021-11-22 16:17:31,379 INFO L87 Difference]: Start difference. First operand 110 states and 132 transitions. Second operand has 7 states, 6 states have (on average 6.5) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:17:31,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:17:31,523 INFO L93 Difference]: Finished difference Result 109 states and 131 transitions. [2021-11-22 16:17:31,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 16:17:31,525 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.5) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-22 16:17:31,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:17:31,526 INFO L225 Difference]: With dead ends: 109 [2021-11-22 16:17:31,526 INFO L226 Difference]: Without dead ends: 84 [2021-11-22 16:17:31,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=15, Invalid=24, Unknown=3, NotChecked=0, Total=42 [2021-11-22 16:17:31,527 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 28 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:17:31,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 46 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 12 Unchecked, 0.1s Time] [2021-11-22 16:17:31,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-22 16:17:31,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-11-22 16:17:31,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 82 states have (on average 1.2195121951219512) internal successors, (100), 83 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:17:31,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2021-11-22 16:17:31,535 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 20 [2021-11-22 16:17:31,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:17:31,536 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2021-11-22 16:17:31,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.5) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:17:31,536 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2021-11-22 16:17:31,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-22 16:17:31,538 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:17:31,538 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:17:31,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-22 16:17:31,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:17:31,752 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-22 16:17:31,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:17:31,752 INFO L85 PathProgramCache]: Analyzing trace with hash -521097088, now seen corresponding path program 2 times [2021-11-22 16:17:31,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:17:31,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [657222139] [2021-11-22 16:17:31,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 16:17:31,753 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:17:31,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:17:31,754 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:17:31,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-22 16:17:31,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 16:17:31,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:17:31,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-22 16:17:31,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:17:31,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-22 16:17:32,521 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-22 16:17:32,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:17:35,728 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:17:35,728 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:17:35,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [657222139] [2021-11-22 16:17:35,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [657222139] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:17:35,729 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:17:35,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-11-22 16:17:35,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310881451] [2021-11-22 16:17:35,729 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:17:35,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-22 16:17:35,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:17:35,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-22 16:17:35,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-11-22 16:17:35,730 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 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) [2021-11-22 16:17:36,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:17:36,558 INFO L93 Difference]: Finished difference Result 105 states and 124 transitions. [2021-11-22 16:17:36,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 16:17:36,560 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 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) Word has length 33 [2021-11-22 16:17:36,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:17:36,561 INFO L225 Difference]: With dead ends: 105 [2021-11-22 16:17:36,561 INFO L226 Difference]: Without dead ends: 104 [2021-11-22 16:17:36,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-11-22 16:17:36,562 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 39 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-22 16:17:36,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 213 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 80 Invalid, 0 Unknown, 45 Unchecked, 0.5s Time] [2021-11-22 16:17:36,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-22 16:17:36,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 97. [2021-11-22 16:17:36,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 95 states have (on average 1.2210526315789474) internal successors, (116), 96 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:17:36,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 116 transitions. [2021-11-22 16:17:36,570 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 116 transitions. Word has length 33 [2021-11-22 16:17:36,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:17:36,571 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 116 transitions. [2021-11-22 16:17:36,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 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) [2021-11-22 16:17:36,571 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 116 transitions. [2021-11-22 16:17:36,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-22 16:17:36,573 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:17:36,574 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1] [2021-11-22 16:17:36,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-22 16:17:36,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:17:36,787 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-22 16:17:36,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:17:36,788 INFO L85 PathProgramCache]: Analyzing trace with hash -563143139, now seen corresponding path program 3 times [2021-11-22 16:17:36,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:17:36,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [779062810] [2021-11-22 16:17:36,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 16:17:36,789 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:17:36,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:17:36,790 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:17:36,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-22 16:17:36,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-22 16:17:36,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:17:37,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-22 16:17:37,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:17:37,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-22 16:17:38,180 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:17:38,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:17:41,317 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:17:41,318 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:17:41,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [779062810] [2021-11-22 16:17:41,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [779062810] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:17:41,319 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:17:41,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-11-22 16:17:41,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834177642] [2021-11-22 16:17:41,319 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:17:41,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-22 16:17:41,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:17:41,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-22 16:17:41,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-11-22 16:17:41,322 INFO L87 Difference]: Start difference. First operand 97 states and 116 transitions. Second operand has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 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) [2021-11-22 16:17:58,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:17:58,536 INFO L93 Difference]: Finished difference Result 762 states and 905 transitions. [2021-11-22 16:17:58,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-22 16:17:58,538 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 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 34 [2021-11-22 16:17:58,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:17:58,544 INFO L225 Difference]: With dead ends: 762 [2021-11-22 16:17:58,544 INFO L226 Difference]: Without dead ends: 762 [2021-11-22 16:17:58,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2021-11-22 16:17:58,546 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 1417 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1417 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:17:58,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1417 Valid, 806 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 892 Invalid, 0 Unknown, 17 Unchecked, 5.2s Time] [2021-11-22 16:17:58,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-11-22 16:17:58,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 129. [2021-11-22 16:17:58,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 127 states have (on average 1.2283464566929134) internal successors, (156), 128 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:17:58,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 156 transitions. [2021-11-22 16:17:58,562 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 156 transitions. Word has length 34 [2021-11-22 16:17:58,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:17:58,562 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 156 transitions. [2021-11-22 16:17:58,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.142857142857143) internal successors, (66), 22 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) [2021-11-22 16:17:58,563 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 156 transitions. [2021-11-22 16:17:58,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-22 16:17:58,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:17:58,565 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:17:58,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-22 16:17:58,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:17:58,779 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-22 16:17:58,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:17:58,779 INFO L85 PathProgramCache]: Analyzing trace with hash -701692519, now seen corresponding path program 1 times [2021-11-22 16:17:58,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:17:58,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [302598291] [2021-11-22 16:17:58,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:17:58,781 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:17:58,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:17:58,781 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:17:58,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-22 16:17:58,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:17:58,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-22 16:17:58,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:17:58,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-22 16:17:59,490 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 16:17:59,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:18:01,820 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:18:01,820 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:18:01,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [302598291] [2021-11-22 16:18:01,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [302598291] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:18:01,821 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:18:01,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-11-22 16:18:01,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527778121] [2021-11-22 16:18:01,821 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:18:01,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-22 16:18:01,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:18:01,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-22 16:18:01,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-11-22 16:18:01,822 INFO L87 Difference]: Start difference. First operand 129 states and 156 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 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) [2021-11-22 16:18:02,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:18:02,225 INFO L93 Difference]: Finished difference Result 136 states and 162 transitions. [2021-11-22 16:18:02,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 16:18:02,227 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-22 16:18:02,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:18:02,228 INFO L225 Difference]: With dead ends: 136 [2021-11-22 16:18:02,228 INFO L226 Difference]: Without dead ends: 135 [2021-11-22 16:18:02,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-11-22 16:18:02,229 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 37 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:18:02,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 151 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 59 Invalid, 0 Unknown, 27 Unchecked, 0.2s Time] [2021-11-22 16:18:02,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-22 16:18:02,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 129. [2021-11-22 16:18:02,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 127 states have (on average 1.220472440944882) internal successors, (155), 128 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:18:02,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 155 transitions. [2021-11-22 16:18:02,237 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 155 transitions. Word has length 35 [2021-11-22 16:18:02,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:18:02,238 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 155 transitions. [2021-11-22 16:18:02,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 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) [2021-11-22 16:18:02,238 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 155 transitions. [2021-11-22 16:18:02,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-22 16:18:02,240 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:18:02,240 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:18:02,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-22 16:18:02,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:18:02,446 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-22 16:18:02,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:18:02,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1227137273, now seen corresponding path program 2 times [2021-11-22 16:18:02,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:18:02,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [858223355] [2021-11-22 16:18:02,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 16:18:02,448 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:18:02,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:18:02,449 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:18:02,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-22 16:18:02,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 16:18:02,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:18:02,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-22 16:18:02,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:18:02,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-22 16:18:03,402 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:18:03,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:18:05,530 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:18:05,530 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:18:05,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [858223355] [2021-11-22 16:18:05,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [858223355] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:18:05,530 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:18:05,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-11-22 16:18:05,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145372135] [2021-11-22 16:18:05,530 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:18:05,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-22 16:18:05,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:18:05,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-22 16:18:05,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-11-22 16:18:05,532 INFO L87 Difference]: Start difference. First operand 129 states and 155 transitions. Second operand has 16 states, 15 states have (on average 4.533333333333333) internal successors, (68), 16 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) [2021-11-22 16:18:09,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:18:09,391 INFO L93 Difference]: Finished difference Result 190 states and 228 transitions. [2021-11-22 16:18:09,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-22 16:18:09,393 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.533333333333333) internal successors, (68), 16 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-22 16:18:09,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:18:09,395 INFO L225 Difference]: With dead ends: 190 [2021-11-22 16:18:09,395 INFO L226 Difference]: Without dead ends: 190 [2021-11-22 16:18:09,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=228, Invalid=584, Unknown=0, NotChecked=0, Total=812 [2021-11-22 16:18:09,397 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 433 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:18:09,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 220 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 210 Invalid, 0 Unknown, 27 Unchecked, 1.3s Time] [2021-11-22 16:18:09,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-22 16:18:09,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2021-11-22 16:18:09,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 187 states have (on average 1.213903743315508) internal successors, (227), 188 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:18:09,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 227 transitions. [2021-11-22 16:18:09,405 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 227 transitions. Word has length 35 [2021-11-22 16:18:09,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:18:09,405 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 227 transitions. [2021-11-22 16:18:09,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.533333333333333) internal successors, (68), 16 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) [2021-11-22 16:18:09,406 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 227 transitions. [2021-11-22 16:18:09,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-22 16:18:09,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:18:09,409 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:18:09,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-22 16:18:09,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:18:09,622 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-22 16:18:09,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:18:09,623 INFO L85 PathProgramCache]: Analyzing trace with hash -856498489, now seen corresponding path program 3 times [2021-11-22 16:18:09,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:18:09,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1407876867] [2021-11-22 16:18:09,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 16:18:09,624 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:18:09,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:18:09,625 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:18:09,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-22 16:18:09,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-22 16:18:09,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:18:09,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-22 16:18:09,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:18:09,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-22 16:18:11,149 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 71 proven. 1 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-22 16:18:11,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:18:15,650 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 32 proven. 40 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-22 16:18:15,650 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:18:15,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1407876867] [2021-11-22 16:18:15,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1407876867] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:18:15,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:18:15,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-11-22 16:18:15,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259879778] [2021-11-22 16:18:15,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:18:15,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-22 16:18:15,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:18:15,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-22 16:18:15,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-11-22 16:18:15,652 INFO L87 Difference]: Start difference. First operand 189 states and 227 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:18:15,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:18:15,975 INFO L93 Difference]: Finished difference Result 264 states and 315 transitions. [2021-11-22 16:18:15,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 16:18:15,976 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 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 [2021-11-22 16:18:15,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:18:15,978 INFO L225 Difference]: With dead ends: 264 [2021-11-22 16:18:15,978 INFO L226 Difference]: Without dead ends: 252 [2021-11-22 16:18:15,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-11-22 16:18:15,980 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 36 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:18:15,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 132 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 79 Unchecked, 0.2s Time] [2021-11-22 16:18:15,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-22 16:18:15,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 244. [2021-11-22 16:18:15,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 242 states have (on average 1.2231404958677685) internal successors, (296), 243 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:18:15,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 296 transitions. [2021-11-22 16:18:15,989 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 296 transitions. Word has length 63 [2021-11-22 16:18:15,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:18:15,989 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 296 transitions. [2021-11-22 16:18:15,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:18:15,989 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 296 transitions. [2021-11-22 16:18:15,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-22 16:18:15,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:18:15,993 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:18:16,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-22 16:18:16,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:18:16,207 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-22 16:18:16,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:18:16,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1772212195, now seen corresponding path program 3 times [2021-11-22 16:18:16,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:18:16,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1450566248] [2021-11-22 16:18:16,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 16:18:16,208 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:18:16,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:18:16,209 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:18:16,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-22 16:18:16,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-22 16:18:16,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:18:16,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-22 16:18:16,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:18:16,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-22 16:18:18,361 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 97 proven. 12 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-22 16:18:18,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:19:06,133 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-22 16:19:06,133 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:19:06,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1450566248] [2021-11-22 16:19:06,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1450566248] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:19:06,134 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:19:06,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-11-22 16:19:06,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120876607] [2021-11-22 16:19:06,134 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:19:06,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-22 16:19:06,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:19:06,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-22 16:19:06,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=544, Unknown=3, NotChecked=0, Total=650 [2021-11-22 16:19:06,136 INFO L87 Difference]: Start difference. First operand 244 states and 296 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) [2021-11-22 16:19:23,480 WARN L227 SmtUtils]: Spent 12.56s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 16:19:53,298 WARN L227 SmtUtils]: Spent 15.18s on a formula simplification. DAG size of input: 30 DAG size of output: 30 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 16:20:00,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:20:00,007 INFO L93 Difference]: Finished difference Result 279 states and 336 transitions. [2021-11-22 16:20:00,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-22 16:20:00,007 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 65 [2021-11-22 16:20:00,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:20:00,009 INFO L225 Difference]: With dead ends: 279 [2021-11-22 16:20:00,009 INFO L226 Difference]: Without dead ends: 278 [2021-11-22 16:20:00,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 71.8s TimeCoverageRelationStatistics Valid=170, Invalid=874, Unknown=12, NotChecked=0, Total=1056 [2021-11-22 16:20:00,011 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 54 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-22 16:20:00,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 364 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 149 Invalid, 0 Unknown, 177 Unchecked, 1.8s Time] [2021-11-22 16:20:00,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-22 16:20:00,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 264. [2021-11-22 16:20:00,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 262 states have (on average 1.2251908396946565) internal successors, (321), 263 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:00,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 321 transitions. [2021-11-22 16:20:00,022 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 321 transitions. Word has length 65 [2021-11-22 16:20:00,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:20:00,022 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 321 transitions. [2021-11-22 16:20:00,023 INFO L471 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) [2021-11-22 16:20:00,023 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 321 transitions. [2021-11-22 16:20:00,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-22 16:20:00,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:20:00,025 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1] [2021-11-22 16:20:00,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-22 16:20:00,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:20:00,230 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-22 16:20:00,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:20:00,231 INFO L85 PathProgramCache]: Analyzing trace with hash 58542645, now seen corresponding path program 4 times [2021-11-22 16:20:00,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:20:00,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1681549030] [2021-11-22 16:20:00,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 16:20:00,232 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:20:00,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:20:00,232 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:20:00,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-22 16:20:00,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 16:20:00,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:20:00,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-22 16:20:00,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:20:00,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-22 16:20:04,764 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:04,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:20:22,689 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:20:22,689 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:20:22,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1681549030] [2021-11-22 16:20:22,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1681549030] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:20:22,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:20:22,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2021-11-22 16:20:22,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11941994] [2021-11-22 16:20:22,690 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:20:22,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-22 16:20:22,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:20:22,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-22 16:20:22,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2021-11-22 16:20:22,693 INFO L87 Difference]: Start difference. First operand 264 states and 321 transitions. Second operand has 46 states, 45 states have (on average 2.888888888888889) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:20:54,280 WARN L227 SmtUtils]: Spent 16.66s on a formula simplification that was a NOOP. DAG size: 171 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 16:20:56,645 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:20:58,659 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:21:00,433 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:21:02,523 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:21:18,344 WARN L227 SmtUtils]: Spent 14.87s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 16:21:48,485 WARN L227 SmtUtils]: Spent 28.62s on a formula simplification. DAG size of input: 163 DAG size of output: 163 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 16:21:51,674 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:21:53,687 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:21:55,690 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:21:57,930 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:22:11,747 WARN L227 SmtUtils]: Spent 12.99s on a formula simplification that was a NOOP. DAG size: 157 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 16:22:36,899 WARN L227 SmtUtils]: Spent 23.25s on a formula simplification. DAG size of input: 152 DAG size of output: 152 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 16:22:39,748 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:22:41,752 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:22:44,316 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:22:53,683 WARN L227 SmtUtils]: Spent 8.61s on a formula simplification that was a NOOP. DAG size: 146 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 16:23:13,831 WARN L227 SmtUtils]: Spent 18.15s on a formula simplification. DAG size of input: 141 DAG size of output: 141 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 16:23:16,745 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:23:18,749 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:23:20,824 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:23:29,100 WARN L227 SmtUtils]: Spent 7.31s on a formula simplification that was a NOOP. DAG size: 136 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 16:23:45,866 WARN L227 SmtUtils]: Spent 14.70s on a formula simplification. DAG size of input: 131 DAG size of output: 131 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 16:23:48,532 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:23:50,535 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:23:52,649 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:24:00,746 WARN L227 SmtUtils]: Spent 7.02s on a formula simplification that was a NOOP. DAG size: 125 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 16:24:14,801 WARN L227 SmtUtils]: Spent 12.35s on a formula simplification. DAG size of input: 120 DAG size of output: 120 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 16:24:17,399 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:24:19,466 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:24:21,470 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:24:36,471 WARN L227 SmtUtils]: Spent 7.77s on a formula simplification. DAG size of input: 109 DAG size of output: 109 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 16:24:39,085 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:24:41,088 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:24:43,191 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:24:56,429 WARN L227 SmtUtils]: Spent 6.70s on a formula simplification. DAG size of input: 98 DAG size of output: 98 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 16:24:59,069 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:25:01,155 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:25:11,168 WARN L227 SmtUtils]: Spent 5.14s on a formula simplification. DAG size of input: 88 DAG size of output: 88 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 16:25:13,875 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:25:15,922 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:25:45,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:25:45,607 INFO L93 Difference]: Finished difference Result 3479 states and 4158 transitions. [2021-11-22 16:25:45,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-22 16:25:45,610 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.888888888888889) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 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 66 [2021-11-22 16:25:45,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:25:45,631 INFO L225 Difference]: With dead ends: 3479 [2021-11-22 16:25:45,632 INFO L226 Difference]: Without dead ends: 3479 [2021-11-22 16:25:45,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2441 ImplicationChecksByTransitivity, 250.5s TimeCoverageRelationStatistics Valid=2223, Invalid=5259, Unknown=0, NotChecked=0, Total=7482 [2021-11-22 16:25:45,636 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 6399 mSDsluCounter, 3527 mSDsCounter, 0 mSdLazyCounter, 4066 mSolverCounterSat, 159 mSolverCounterUnsat, 26 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 83.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6399 SdHoareTripleChecker+Valid, 3711 SdHoareTripleChecker+Invalid, 4282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 4066 IncrementalHoareTripleChecker+Invalid, 26 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 85.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:25:45,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6399 Valid, 3711 Invalid, 4282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 4066 Invalid, 26 Unknown, 31 Unchecked, 85.3s Time] [2021-11-22 16:25:45,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3479 states. [2021-11-22 16:25:45,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3479 to 328. [2021-11-22 16:25:45,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 326 states have (on average 1.2300613496932515) internal successors, (401), 327 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:25:45,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 401 transitions. [2021-11-22 16:25:45,691 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 401 transitions. Word has length 66 [2021-11-22 16:25:45,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:25:45,692 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 401 transitions. [2021-11-22 16:25:45,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.888888888888889) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:25:45,692 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 401 transitions. [2021-11-22 16:25:45,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-22 16:25:45,693 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:25:45,694 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:25:45,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-22 16:25:45,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:25:45,909 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-22 16:25:45,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:25:45,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1312455460, now seen corresponding path program 4 times [2021-11-22 16:25:45,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:25:45,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1004392296] [2021-11-22 16:25:45,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 16:25:45,910 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:25:45,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:25:45,911 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:25:45,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-22 16:25:46,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 16:25:46,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:25:46,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-22 16:25:46,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:25:46,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-22 16:25:47,846 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 92 proven. 39 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-22 16:25:47,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:25:55,732 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:25:55,733 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:25:55,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1004392296] [2021-11-22 16:25:55,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1004392296] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:25:55,733 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:25:55,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 25 [2021-11-22 16:25:55,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916144099] [2021-11-22 16:25:55,734 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:25:55,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-22 16:25:55,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:25:55,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-22 16:25:55,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-11-22 16:25:55,736 INFO L87 Difference]: Start difference. First operand 328 states and 401 transitions. Second operand has 25 states, 25 states have (on average 4.56) internal successors, (114), 25 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:26:26,820 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:26:46,873 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:26:54,627 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:27:09,841 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:27:17,516 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:27:43,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:27:43,562 INFO L93 Difference]: Finished difference Result 1039 states and 1245 transitions. [2021-11-22 16:27:43,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-22 16:27:43,566 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.56) internal successors, (114), 25 states have internal predecessors, (114), 0 states have call successors, (0), 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 67 [2021-11-22 16:27:43,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:27:43,570 INFO L225 Difference]: With dead ends: 1039 [2021-11-22 16:27:43,570 INFO L226 Difference]: Without dead ends: 1035 [2021-11-22 16:27:43,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1721 ImplicationChecksByTransitivity, 60.9s TimeCoverageRelationStatistics Valid=719, Invalid=6087, Unknown=0, NotChecked=0, Total=6806 [2021-11-22 16:27:43,573 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 503 mSDsluCounter, 2619 mSDsCounter, 0 mSdLazyCounter, 2311 mSolverCounterSat, 36 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 2820 SdHoareTripleChecker+Invalid, 2872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2311 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 523 IncrementalHoareTripleChecker+Unchecked, 52.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:27:43,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 2820 Invalid, 2872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2311 Invalid, 2 Unknown, 523 Unchecked, 52.1s Time] [2021-11-22 16:27:43,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2021-11-22 16:27:43,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 359. [2021-11-22 16:27:43,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 357 states have (on average 1.2296918767507004) internal successors, (439), 358 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:27:43,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 439 transitions. [2021-11-22 16:27:43,591 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 439 transitions. Word has length 67 [2021-11-22 16:27:43,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:27:43,591 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 439 transitions. [2021-11-22 16:27:43,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.56) internal successors, (114), 25 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:27:43,592 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 439 transitions. [2021-11-22 16:27:43,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-22 16:27:43,593 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:27:43,593 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:27:43,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-22 16:27:43,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:27:43,808 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-22 16:27:43,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:27:43,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1851526538, now seen corresponding path program 5 times [2021-11-22 16:27:43,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:27:43,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [464186975] [2021-11-22 16:27:43,809 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 16:27:43,810 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:27:43,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:27:43,810 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:27:43,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-22 16:27:44,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-22 16:27:44,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:27:44,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-22 16:27:44,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:27:44,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-22 16:27:45,958 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 92 proven. 39 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-22 16:27:45,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:27:54,143 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:27:54,143 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:27:54,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [464186975] [2021-11-22 16:27:54,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [464186975] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:27:54,143 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:27:54,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 25 [2021-11-22 16:27:54,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914966062] [2021-11-22 16:27:54,144 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:27:54,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-22 16:27:54,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:27:54,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-22 16:27:54,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-11-22 16:27:54,145 INFO L87 Difference]: Start difference. First operand 359 states and 439 transitions. Second operand has 25 states, 25 states have (on average 4.56) internal successors, (114), 25 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:28:35,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:28:35,672 INFO L93 Difference]: Finished difference Result 821 states and 990 transitions. [2021-11-22 16:28:35,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-22 16:28:35,675 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.56) internal successors, (114), 25 states have internal predecessors, (114), 0 states have call successors, (0), 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 67 [2021-11-22 16:28:35,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:28:35,678 INFO L225 Difference]: With dead ends: 821 [2021-11-22 16:28:35,678 INFO L226 Difference]: Without dead ends: 817 [2021-11-22 16:28:35,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=338, Invalid=2418, Unknown=0, NotChecked=0, Total=2756 [2021-11-22 16:28:35,680 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 417 mSDsluCounter, 1466 mSDsCounter, 0 mSdLazyCounter, 1387 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 1583 SdHoareTripleChecker+Invalid, 1582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 23.9s IncrementalHoareTripleChecker+Time [2021-11-22 16:28:35,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 1583 Invalid, 1582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1387 Invalid, 0 Unknown, 164 Unchecked, 23.9s Time] [2021-11-22 16:28:35,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-11-22 16:28:35,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 389. [2021-11-22 16:28:35,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 387 states have (on average 1.2325581395348837) internal successors, (477), 388 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:28:35,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 477 transitions. [2021-11-22 16:28:35,696 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 477 transitions. Word has length 67 [2021-11-22 16:28:35,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:28:35,696 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 477 transitions. [2021-11-22 16:28:35,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.56) internal successors, (114), 25 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:28:35,697 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 477 transitions. [2021-11-22 16:28:35,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-22 16:28:35,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:28:35,698 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:28:35,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-22 16:28:35,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:28:35,913 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-22 16:28:35,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:28:35,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1209465572, now seen corresponding path program 6 times [2021-11-22 16:28:35,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:28:35,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1336190413] [2021-11-22 16:28:35,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 16:28:35,914 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:28:35,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:28:35,916 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:28:35,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-22 16:28:36,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-22 16:28:36,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:28:36,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-22 16:28:36,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:28:36,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-22 16:28:37,793 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 80 proven. 17 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-22 16:28:37,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:28:40,012 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 87 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-22 16:28:40,012 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:28:40,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1336190413] [2021-11-22 16:28:40,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1336190413] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:28:40,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:28:40,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-11-22 16:28:40,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142712808] [2021-11-22 16:28:40,013 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:28:40,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-22 16:28:40,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:28:40,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-22 16:28:40,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-11-22 16:28:40,015 INFO L87 Difference]: Start difference. First operand 389 states and 477 transitions. Second operand has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:28:41,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:28:41,455 INFO L93 Difference]: Finished difference Result 504 states and 612 transitions. [2021-11-22 16:28:41,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-22 16:28:41,457 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 0 states have call successors, (0), 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 67 [2021-11-22 16:28:41,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:28:41,459 INFO L225 Difference]: With dead ends: 504 [2021-11-22 16:28:41,459 INFO L226 Difference]: Without dead ends: 484 [2021-11-22 16:28:41,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-11-22 16:28:41,460 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 54 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-22 16:28:41,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 254 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 177 Invalid, 0 Unknown, 67 Unchecked, 0.9s Time] [2021-11-22 16:28:41,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-11-22 16:28:41,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 465. [2021-11-22 16:28:41,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 463 states have (on average 1.2419006479481642) internal successors, (575), 464 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:28:41,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 575 transitions. [2021-11-22 16:28:41,473 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 575 transitions. Word has length 67 [2021-11-22 16:28:41,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:28:41,474 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 575 transitions. [2021-11-22 16:28:41,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:28:41,474 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 575 transitions. [2021-11-22 16:28:41,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-22 16:28:41,476 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:28:41,476 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:28:41,506 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-22 16:28:41,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:28:41,691 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-22 16:28:41,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:28:41,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1784706217, now seen corresponding path program 4 times [2021-11-22 16:28:41,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:28:41,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2052152652] [2021-11-22 16:28:41,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 16:28:41,692 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:28:41,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:28:41,693 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:28:41,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-22 16:28:41,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 16:28:41,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:28:41,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-22 16:28:41,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:28:41,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-22 16:28:45,016 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 58 proven. 128 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-22 16:28:45,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:28:58,677 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:28:58,678 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:28:58,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2052152652] [2021-11-22 16:28:58,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2052152652] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:28:58,678 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:28:58,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 33 [2021-11-22 16:28:58,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434723703] [2021-11-22 16:28:58,679 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:28:58,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-22 16:28:58,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:28:58,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-22 16:28:58,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-11-22 16:28:58,680 INFO L87 Difference]: Start difference. First operand 465 states and 575 transitions. Second operand has 33 states, 33 states have (on average 4.303030303030303) internal successors, (142), 33 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:29:37,719 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:29:47,924 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:30:13,049 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:30:18,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:30:18,415 INFO L93 Difference]: Finished difference Result 1170 states and 1415 transitions. [2021-11-22 16:30:18,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-22 16:30:18,418 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.303030303030303) internal successors, (142), 33 states have internal predecessors, (142), 0 states have call successors, (0), 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 [2021-11-22 16:30:18,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:30:18,423 INFO L225 Difference]: With dead ends: 1170 [2021-11-22 16:30:18,423 INFO L226 Difference]: Without dead ends: 1166 [2021-11-22 16:30:18,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 116 SyntacticMatches, 5 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 67.3s TimeCoverageRelationStatistics Valid=804, Invalid=5838, Unknown=0, NotChecked=0, Total=6642 [2021-11-22 16:30:18,426 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 683 mSDsluCounter, 1714 mSDsCounter, 0 mSdLazyCounter, 1561 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 1827 SdHoareTripleChecker+Invalid, 1985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 362 IncrementalHoareTripleChecker+Unchecked, 21.8s IncrementalHoareTripleChecker+Time [2021-11-22 16:30:18,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [683 Valid, 1827 Invalid, 1985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1561 Invalid, 0 Unknown, 362 Unchecked, 21.8s Time] [2021-11-22 16:30:18,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2021-11-22 16:30:18,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 531. [2021-11-22 16:30:18,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 529 states have (on average 1.2476370510396975) internal successors, (660), 530 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:30:18,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 660 transitions. [2021-11-22 16:30:18,443 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 660 transitions. Word has length 73 [2021-11-22 16:30:18,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:30:18,444 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 660 transitions. [2021-11-22 16:30:18,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.303030303030303) internal successors, (142), 33 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:30:18,444 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 660 transitions. [2021-11-22 16:30:18,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-22 16:30:18,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:30:18,446 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:30:18,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-22 16:30:18,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:30:18,661 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-22 16:30:18,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:30:18,662 INFO L85 PathProgramCache]: Analyzing trace with hash -2041642963, now seen corresponding path program 1 times [2021-11-22 16:30:18,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:30:18,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1611587304] [2021-11-22 16:30:18,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:30:18,663 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:30:18,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:30:18,663 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:30:18,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-22 16:30:18,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:30:18,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 16:30:18,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:30:18,905 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-22 16:30:18,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2021-11-22 16:30:19,153 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-22 16:30:19,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:30:19,570 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-22 16:30:19,571 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:30:19,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1611587304] [2021-11-22 16:30:19,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1611587304] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:30:19,571 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:30:19,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-22 16:30:19,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335439489] [2021-11-22 16:30:19,571 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:30:19,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 16:30:19,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:30:19,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 16:30:19,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-22 16:30:19,573 INFO L87 Difference]: Start difference. First operand 531 states and 660 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:30:19,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:30:19,810 INFO L93 Difference]: Finished difference Result 532 states and 638 transitions. [2021-11-22 16:30:19,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 16:30:19,812 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 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 [2021-11-22 16:30:19,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:30:19,815 INFO L225 Difference]: With dead ends: 532 [2021-11-22 16:30:19,815 INFO L226 Difference]: Without dead ends: 518 [2021-11-22 16:30:19,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-22 16:30:19,816 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:30:19,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 67 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 3 Unchecked, 0.2s Time] [2021-11-22 16:30:19,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-11-22 16:30:19,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 514. [2021-11-22 16:30:19,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 512 states have (on average 1.208984375) internal successors, (619), 513 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:30:19,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 619 transitions. [2021-11-22 16:30:19,829 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 619 transitions. Word has length 73 [2021-11-22 16:30:19,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:30:19,830 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 619 transitions. [2021-11-22 16:30:19,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:30:19,830 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 619 transitions. [2021-11-22 16:30:19,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-22 16:30:19,832 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:30:19,832 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:30:19,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-22 16:30:20,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:30:20,046 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-22 16:30:20,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:30:20,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1305355632, now seen corresponding path program 1 times [2021-11-22 16:30:20,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:30:20,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [624411391] [2021-11-22 16:30:20,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:30:20,047 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:30:20,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:30:20,048 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:30:20,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-22 16:30:20,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:30:20,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 16:30:20,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:30:20,299 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-22 16:30:20,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2021-11-22 16:30:20,487 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-22 16:30:20,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:30:21,011 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-22 16:30:21,011 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:30:21,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [624411391] [2021-11-22 16:30:21,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [624411391] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:30:21,012 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:30:21,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-22 16:30:21,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358435925] [2021-11-22 16:30:21,012 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:30:21,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 16:30:21,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:30:21,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 16:30:21,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-22 16:30:21,013 INFO L87 Difference]: Start difference. First operand 514 states and 619 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:30:23,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:30:23,367 INFO L93 Difference]: Finished difference Result 564 states and 668 transitions. [2021-11-22 16:30:23,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 16:30:23,369 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 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 [2021-11-22 16:30:23,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:30:23,371 INFO L225 Difference]: With dead ends: 564 [2021-11-22 16:30:23,371 INFO L226 Difference]: Without dead ends: 562 [2021-11-22 16:30:23,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-22 16:30:23,372 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:30:23,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 119 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 6 Unchecked, 0.3s Time] [2021-11-22 16:30:23,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-11-22 16:30:23,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 544. [2021-11-22 16:30:23,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 542 states have (on average 1.1955719557195572) internal successors, (648), 543 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:30:23,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 648 transitions. [2021-11-22 16:30:23,386 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 648 transitions. Word has length 73 [2021-11-22 16:30:23,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:30:23,386 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 648 transitions. [2021-11-22 16:30:23,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:30:23,387 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 648 transitions. [2021-11-22 16:30:23,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-22 16:30:23,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:30:23,389 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:30:23,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-22 16:30:23,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:30:23,602 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-22 16:30:23,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:30:23,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1786435890, now seen corresponding path program 1 times [2021-11-22 16:30:23,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:30:23,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [146965496] [2021-11-22 16:30:23,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:30:23,605 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:30:23,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:30:23,606 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:30:23,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-22 16:30:23,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:30:23,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-22 16:30:23,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:30:23,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-22 16:30:25,657 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 100 proven. 34 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-22 16:30:25,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:30:33,521 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 16:30:33,521 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:30:33,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [146965496] [2021-11-22 16:30:33,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [146965496] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:30:33,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:30:33,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 23 [2021-11-22 16:30:33,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654496592] [2021-11-22 16:30:33,522 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:30:33,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-22 16:30:33,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:30:33,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-22 16:30:33,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-11-22 16:30:33,523 INFO L87 Difference]: Start difference. First operand 544 states and 648 transitions. Second operand has 23 states, 23 states have (on average 5.304347826086956) internal successors, (122), 23 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:30:42,902 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:30:45,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:30:45,569 INFO L93 Difference]: Finished difference Result 641 states and 750 transitions. [2021-11-22 16:30:45,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-22 16:30:45,572 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.304347826086956) internal successors, (122), 23 states have internal predecessors, (122), 0 states have call successors, (0), 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 [2021-11-22 16:30:45,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:30:45,575 INFO L225 Difference]: With dead ends: 641 [2021-11-22 16:30:45,575 INFO L226 Difference]: Without dead ends: 635 [2021-11-22 16:30:45,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2021-11-22 16:30:45,576 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 72 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2021-11-22 16:30:45,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 504 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 449 Invalid, 0 Unknown, 42 Unchecked, 7.5s Time] [2021-11-22 16:30:45,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-22 16:30:45,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 524. [2021-11-22 16:30:45,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 522 states have (on average 1.1934865900383143) internal successors, (623), 523 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:30:45,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 623 transitions. [2021-11-22 16:30:45,589 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 623 transitions. Word has length 73 [2021-11-22 16:30:45,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:30:45,589 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 623 transitions. [2021-11-22 16:30:45,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.304347826086956) internal successors, (122), 23 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:30:45,590 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 623 transitions. [2021-11-22 16:30:45,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-22 16:30:45,592 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:30:45,592 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:30:45,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-22 16:30:45,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:30:45,807 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-22 16:30:45,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:30:45,807 INFO L85 PathProgramCache]: Analyzing trace with hash -2043957520, now seen corresponding path program 7 times [2021-11-22 16:30:45,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:30:45,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1787739094] [2021-11-22 16:30:45,808 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 16:30:45,808 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:30:45,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:30:45,809 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:30:45,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84db0798-1edb-42b3-ace7-8731b0313684/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-22 16:30:45,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:30:45,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-22 16:30:45,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:30:45,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-22 16:30:49,042 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 66 proven. 118 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-22 16:30:49,042 INFO L328 TraceCheckSpWp]: Computing backward predicates...