./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0102-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0102-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa --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 fa260939b291574cde59d3c10d7828de68c26744f55119227115b01940792a6f --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:03:37,283 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:03:37,285 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:03:37,316 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:03:37,316 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:03:37,317 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:03:37,319 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:03:37,321 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:03:37,323 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:03:37,324 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:03:37,326 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:03:37,327 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:03:37,327 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:03:37,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:03:37,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:03:37,332 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:03:37,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:03:37,334 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:03:37,336 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:03:37,339 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:03:37,341 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:03:37,342 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:03:37,343 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:03:37,344 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:03:37,348 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:03:37,348 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:03:37,349 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:03:37,350 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:03:37,350 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:03:37,352 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:03:37,352 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:03:37,353 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:03:37,354 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:03:37,354 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:03:37,356 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:03:37,356 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:03:37,356 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:03:37,357 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:03:37,357 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:03:37,358 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:03:37,358 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:03:37,359 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-06 18:03:37,376 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:03:37,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:03:37,377 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:03:37,377 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:03:37,377 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:03:37,378 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:03:37,378 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:03:37,378 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:03:37,378 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:03:37,378 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:03:37,379 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:03:37,379 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 18:03:37,379 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:03:37,379 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:03:37,379 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:03:37,379 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-06 18:03:37,379 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-06 18:03:37,379 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-06 18:03:37,380 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:03:37,380 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 18:03:37,380 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:03:37,380 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:03:37,380 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:03:37,380 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:03:37,380 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:03:37,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:03:37,381 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:03:37,381 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:03:37,381 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:03:37,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:03:37,381 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:03:37,381 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_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa260939b291574cde59d3c10d7828de68c26744f55119227115b01940792a6f [2021-12-06 18:03:37,567 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:03:37,586 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:03:37,588 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:03:37,589 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:03:37,590 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:03:37,591 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/memsafety/test-0102-1.i [2021-12-06 18:03:37,631 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/data/02ae3bde9/505fa774ee684372a9e2bf649fdf24b6/FLAG8f70500d9 [2021-12-06 18:03:38,054 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:03:38,054 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/sv-benchmarks/c/memsafety/test-0102-1.i [2021-12-06 18:03:38,065 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/data/02ae3bde9/505fa774ee684372a9e2bf649fdf24b6/FLAG8f70500d9 [2021-12-06 18:03:38,076 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/data/02ae3bde9/505fa774ee684372a9e2bf649fdf24b6 [2021-12-06 18:03:38,078 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:03:38,079 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:03:38,080 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:03:38,080 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:03:38,082 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:03:38,083 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:03:38" (1/1) ... [2021-12-06 18:03:38,084 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b6c5ac8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:03:38, skipping insertion in model container [2021-12-06 18:03:38,084 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:03:38" (1/1) ... [2021-12-06 18:03:38,089 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:03:38,120 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:03:38,338 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:03:38,346 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) [2021-12-06 18:03:38,347 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@412a12f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:03:38, skipping insertion in model container [2021-12-06 18:03:38,347 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:03:38,348 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-06 18:03:38,349 INFO L158 Benchmark]: Toolchain (without parser) took 269.32ms. Allocated memory was 77.6MB in the beginning and 111.1MB in the end (delta: 33.6MB). Free memory was 55.5MB in the beginning and 85.9MB in the end (delta: -30.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-06 18:03:38,350 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 77.6MB. Free memory is still 56.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 18:03:38,351 INFO L158 Benchmark]: CACSL2BoogieTranslator took 267.53ms. Allocated memory was 77.6MB in the beginning and 111.1MB in the end (delta: 33.6MB). Free memory was 55.5MB in the beginning and 85.9MB in the end (delta: -30.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-06 18:03:38,352 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 77.6MB. Free memory is still 56.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 267.53ms. Allocated memory was 77.6MB in the beginning and 111.1MB in the end (delta: 33.6MB). Free memory was 55.5MB in the beginning and 85.9MB in the end (delta: -30.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 551]: 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_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0102-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa --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 fa260939b291574cde59d3c10d7828de68c26744f55119227115b01940792a6f --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:03:39,712 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:03:39,713 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:03:39,735 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:03:39,735 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:03:39,736 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:03:39,737 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:03:39,739 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:03:39,740 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:03:39,741 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:03:39,742 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:03:39,743 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:03:39,743 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:03:39,744 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:03:39,745 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:03:39,746 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:03:39,747 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:03:39,748 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:03:39,750 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:03:39,751 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:03:39,753 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:03:39,754 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:03:39,756 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:03:39,757 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:03:39,761 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:03:39,761 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:03:39,761 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:03:39,762 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:03:39,763 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:03:39,764 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:03:39,764 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:03:39,765 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:03:39,766 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:03:39,767 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:03:39,768 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:03:39,768 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:03:39,769 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:03:39,769 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:03:39,769 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:03:39,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:03:39,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:03:39,771 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-06 18:03:39,796 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:03:39,796 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:03:39,796 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:03:39,797 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:03:39,797 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:03:39,797 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:03:39,798 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:03:39,798 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:03:39,798 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:03:39,799 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:03:39,799 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:03:39,799 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 18:03:39,799 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:03:39,799 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:03:39,800 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:03:39,800 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-06 18:03:39,800 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-06 18:03:39,800 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-06 18:03:39,801 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:03:39,801 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 18:03:39,801 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-06 18:03:39,801 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-06 18:03:39,801 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:03:39,801 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:03:39,802 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:03:39,802 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:03:39,802 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:03:39,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:03:39,802 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:03:39,803 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:03:39,803 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-06 18:03:39,803 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-06 18:03:39,803 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:03:39,803 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-06 18:03:39,804 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_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa260939b291574cde59d3c10d7828de68c26744f55119227115b01940792a6f [2021-12-06 18:03:40,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:03:40,039 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:03:40,041 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:03:40,042 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:03:40,042 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:03:40,043 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/memsafety/test-0102-1.i [2021-12-06 18:03:40,085 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/data/d4668b06f/d13f7500ff3e426d93c436591f3d6db4/FLAG18165359a [2021-12-06 18:03:40,503 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:03:40,504 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/sv-benchmarks/c/memsafety/test-0102-1.i [2021-12-06 18:03:40,514 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/data/d4668b06f/d13f7500ff3e426d93c436591f3d6db4/FLAG18165359a [2021-12-06 18:03:40,523 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/data/d4668b06f/d13f7500ff3e426d93c436591f3d6db4 [2021-12-06 18:03:40,525 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:03:40,526 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:03:40,527 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:03:40,527 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:03:40,530 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:03:40,530 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:03:40" (1/1) ... [2021-12-06 18:03:40,531 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19d9be8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:03:40, skipping insertion in model container [2021-12-06 18:03:40,531 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:03:40" (1/1) ... [2021-12-06 18:03:40,536 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:03:40,563 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:03:40,778 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:03:40,788 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-06 18:03:40,794 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:03:40,820 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:03:40,825 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:03:40,854 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:03:40,880 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:03:40,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:03:40 WrapperNode [2021-12-06 18:03:40,880 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:03:40,881 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:03:40,881 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:03:40,881 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:03:40,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:03:40" (1/1) ... [2021-12-06 18:03:40,903 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:03:40" (1/1) ... [2021-12-06 18:03:40,925 INFO L137 Inliner]: procedures = 136, calls = 38, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 86 [2021-12-06 18:03:40,925 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:03:40,926 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:03:40,926 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:03:40,926 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:03:40,933 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:03:40" (1/1) ... [2021-12-06 18:03:40,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:03:40" (1/1) ... [2021-12-06 18:03:40,936 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:03:40" (1/1) ... [2021-12-06 18:03:40,937 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:03:40" (1/1) ... [2021-12-06 18:03:40,945 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:03:40" (1/1) ... [2021-12-06 18:03:40,948 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:03:40" (1/1) ... [2021-12-06 18:03:40,950 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:03:40" (1/1) ... [2021-12-06 18:03:40,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:03:40,953 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:03:40,953 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:03:40,953 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:03:40,953 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:03:40" (1/1) ... [2021-12-06 18:03:40,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:03:40,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:03:40,976 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:03:40,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:03:41,005 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2021-12-06 18:03:41,006 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2021-12-06 18:03:41,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 18:03:41,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:03:41,006 INFO L130 BoogieDeclarations]: Found specification of procedure create_sub_list [2021-12-06 18:03:41,006 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sub_list [2021-12-06 18:03:41,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 18:03:41,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 18:03:41,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 18:03:41,006 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_sub [2021-12-06 18:03:41,006 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_sub [2021-12-06 18:03:41,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-06 18:03:41,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 18:03:41,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-06 18:03:41,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-06 18:03:41,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:03:41,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:03:41,087 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:03:41,088 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:03:41,379 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:03:41,386 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:03:41,386 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-06 18:03:41,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:03:41 BoogieIcfgContainer [2021-12-06 18:03:41,388 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:03:41,389 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:03:41,390 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:03:41,392 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:03:41,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:03:40" (1/3) ... [2021-12-06 18:03:41,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45289972 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:03:41, skipping insertion in model container [2021-12-06 18:03:41,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:03:40" (2/3) ... [2021-12-06 18:03:41,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45289972 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:03:41, skipping insertion in model container [2021-12-06 18:03:41,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:03:41" (3/3) ... [2021-12-06 18:03:41,395 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0102-1.i [2021-12-06 18:03:41,400 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:03:41,400 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 31 error locations. [2021-12-06 18:03:41,434 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:03:41,439 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 [2021-12-06 18:03:41,439 INFO L340 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2021-12-06 18:03:41,451 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 46 states have (on average 1.891304347826087) internal successors, (87), 77 states have internal predecessors, (87), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 18:03:41,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-06 18:03:41,456 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:03:41,456 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-06 18:03:41,457 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-06 18:03:41,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:03:41,461 INFO L85 PathProgramCache]: Analyzing trace with hash 106012329, now seen corresponding path program 1 times [2021-12-06 18:03:41,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:03:41,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [717977888] [2021-12-06 18:03:41,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:03:41,470 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:03:41,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:03:41,471 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:03:41,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-06 18:03:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:03:41,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-06 18:03:41,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:03:41,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:03:41,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:03:41,568 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:03:41,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [717977888] [2021-12-06 18:03:41,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [717977888] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:03:41,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:03:41,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:03:41,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489828223] [2021-12-06 18:03:41,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:03:41,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 18:03:41,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:03:41,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 18:03:41,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 18:03:41,607 INFO L87 Difference]: Start difference. First operand has 87 states, 46 states have (on average 1.891304347826087) internal successors, (87), 77 states have internal predecessors, (87), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:03:41,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:03:41,630 INFO L93 Difference]: Finished difference Result 87 states and 93 transitions. [2021-12-06 18:03:41,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 18:03:41,632 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-12-06 18:03:41,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:03:41,638 INFO L225 Difference]: With dead ends: 87 [2021-12-06 18:03:41,639 INFO L226 Difference]: Without dead ends: 85 [2021-12-06 18:03:41,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 18:03:41,643 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:03:41,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:03:41,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-06 18:03:41,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-12-06 18:03:41,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 75 states have internal predecessors, (79), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 18:03:41,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2021-12-06 18:03:41,683 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 5 [2021-12-06 18:03:41,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:03:41,683 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2021-12-06 18:03:41,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:03:41,684 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2021-12-06 18:03:41,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 18:03:41,684 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:03:41,684 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:03:41,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:03:41,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:03:41,885 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting create_sub_listErr0REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-06 18:03:41,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:03:41,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1219357814, now seen corresponding path program 1 times [2021-12-06 18:03:41,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:03:41,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1923079725] [2021-12-06 18:03:41,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:03:41,887 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:03:41,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:03:41,888 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:03:41,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-06 18:03:41,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:03:41,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 18:03:41,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:03:41,997 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 [2021-12-06 18:03:42,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:03:42,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:03:42,029 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:03:42,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1923079725] [2021-12-06 18:03:42,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1923079725] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:03:42,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:03:42,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:03:42,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716182948] [2021-12-06 18:03:42,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:03:42,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:03:42,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:03:42,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:03:42,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:03:42,032 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:03:42,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:03:42,301 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2021-12-06 18:03:42,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:03:42,302 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-06 18:03:42,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:03:42,304 INFO L225 Difference]: With dead ends: 91 [2021-12-06 18:03:42,304 INFO L226 Difference]: Without dead ends: 91 [2021-12-06 18:03:42,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:03:42,305 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 39 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:03:42,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 190 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:03:42,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-06 18:03:42,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2021-12-06 18:03:42,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 45 states have (on average 1.711111111111111) internal successors, (77), 73 states have internal predecessors, (77), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 18:03:42,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2021-12-06 18:03:42,315 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 7 [2021-12-06 18:03:42,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:03:42,315 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2021-12-06 18:03:42,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:03:42,316 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2021-12-06 18:03:42,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 18:03:42,316 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:03:42,316 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:03:42,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-06 18:03:42,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:03:42,518 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting create_sub_listErr1REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-06 18:03:42,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:03:42,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1219357813, now seen corresponding path program 1 times [2021-12-06 18:03:42,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:03:42,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [147276547] [2021-12-06 18:03:42,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:03:42,524 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:03:42,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:03:42,527 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:03:42,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-06 18:03:42,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:03:42,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 18:03:42,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:03:42,727 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 [2021-12-06 18:03:42,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:03:42,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:03:42,781 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:03:42,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [147276547] [2021-12-06 18:03:42,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [147276547] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:03:42,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:03:42,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:03:42,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585954066] [2021-12-06 18:03:42,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:03:42,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:03:42,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:03:42,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:03:42,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:03:42,783 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:03:42,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:03:42,977 INFO L93 Difference]: Finished difference Result 87 states and 93 transitions. [2021-12-06 18:03:42,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:03:42,978 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-06 18:03:42,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:03:42,979 INFO L225 Difference]: With dead ends: 87 [2021-12-06 18:03:42,979 INFO L226 Difference]: Without dead ends: 87 [2021-12-06 18:03:42,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:03:42,980 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 5 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:03:42,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 256 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:03:42,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-06 18:03:42,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2021-12-06 18:03:42,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 48 states have (on average 1.6666666666666667) internal successors, (80), 75 states have internal predecessors, (80), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 18:03:42,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2021-12-06 18:03:42,987 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 7 [2021-12-06 18:03:42,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:03:42,988 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2021-12-06 18:03:42,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:03:42,988 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2021-12-06 18:03:42,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 18:03:42,988 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:03:42,988 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:03:42,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-06 18:03:43,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:03:43,190 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting create_sub_listErr4REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-06 18:03:43,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:03:43,193 INFO L85 PathProgramCache]: Analyzing trace with hash -778231822, now seen corresponding path program 1 times [2021-12-06 18:03:43,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:03:43,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [702509429] [2021-12-06 18:03:43,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:03:43,195 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:03:43,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:03:43,198 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:03:43,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-06 18:03:43,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:03:43,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 18:03:43,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:03:43,303 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 [2021-12-06 18:03:43,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:03:43,309 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:03:43,309 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:03:43,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [702509429] [2021-12-06 18:03:43,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [702509429] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:03:43,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:03:43,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:03:43,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229880789] [2021-12-06 18:03:43,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:03:43,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:03:43,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:03:43,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:03:43,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:03:43,311 INFO L87 Difference]: Start difference. First operand 86 states and 92 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:03:43,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:03:43,389 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2021-12-06 18:03:43,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:03:43,389 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-06 18:03:43,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:03:43,390 INFO L225 Difference]: With dead ends: 86 [2021-12-06 18:03:43,390 INFO L226 Difference]: Without dead ends: 86 [2021-12-06 18:03:43,390 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 [2021-12-06 18:03:43,391 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 6 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:03:43,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 132 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:03:43,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-06 18:03:43,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-12-06 18:03:43,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 74 states have internal predecessors, (79), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 18:03:43,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2021-12-06 18:03:43,397 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 11 [2021-12-06 18:03:43,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:03:43,397 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2021-12-06 18:03:43,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:03:43,398 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2021-12-06 18:03:43,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 18:03:43,398 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:03:43,398 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:03:43,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-06 18:03:43,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:03:43,600 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting create_sub_listErr5REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-06 18:03:43,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:03:43,602 INFO L85 PathProgramCache]: Analyzing trace with hash -778231821, now seen corresponding path program 1 times [2021-12-06 18:03:43,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:03:43,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [88513112] [2021-12-06 18:03:43,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:03:43,605 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:03:43,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:03:43,607 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:03:43,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-06 18:03:43,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:03:43,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 18:03:43,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:03:43,705 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 [2021-12-06 18:03:43,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:03:43,719 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:03:43,719 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:03:43,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [88513112] [2021-12-06 18:03:43,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [88513112] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:03:43,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:03:43,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:03:43,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928474299] [2021-12-06 18:03:43,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:03:43,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:03:43,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:03:43,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:03:43,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:03:43,720 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:03:43,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:03:43,816 INFO L93 Difference]: Finished difference Result 85 states and 91 transitions. [2021-12-06 18:03:43,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:03:43,817 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-06 18:03:43,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:03:43,818 INFO L225 Difference]: With dead ends: 85 [2021-12-06 18:03:43,819 INFO L226 Difference]: Without dead ends: 85 [2021-12-06 18:03:43,819 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 [2021-12-06 18:03:43,820 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 5 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:03:43,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 136 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:03:43,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-06 18:03:43,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2021-12-06 18:03:43,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 48 states have (on average 1.625) internal successors, (78), 73 states have internal predecessors, (78), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 18:03:43,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2021-12-06 18:03:43,828 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 11 [2021-12-06 18:03:43,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:03:43,828 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2021-12-06 18:03:43,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:03:43,829 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2021-12-06 18:03:43,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 18:03:43,829 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:03:43,829 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:03:43,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-06 18:03:44,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:03:44,031 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting list_add_tailErr1REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-06 18:03:44,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:03:44,034 INFO L85 PathProgramCache]: Analyzing trace with hash -70636768, now seen corresponding path program 1 times [2021-12-06 18:03:44,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:03:44,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [518805871] [2021-12-06 18:03:44,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:03:44,036 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:03:44,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:03:44,038 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:03:44,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-06 18:03:44,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:03:44,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 18:03:44,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:03:44,267 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 [2021-12-06 18:03:44,273 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 [2021-12-06 18:03:44,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:03:44,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 18:03:44,373 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:03:44,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-12-06 18:03:44,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:03:44,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:03:44,436 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:03:44,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [518805871] [2021-12-06 18:03:44,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [518805871] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:03:44,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:03:44,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:03:44,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793933803] [2021-12-06 18:03:44,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:03:44,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 18:03:44,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:03:44,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 18:03:44,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:03:44,437 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:03:44,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:03:44,884 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2021-12-06 18:03:44,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 18:03:44,884 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-06 18:03:44,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:03:44,885 INFO L225 Difference]: With dead ends: 112 [2021-12-06 18:03:44,885 INFO L226 Difference]: Without dead ends: 112 [2021-12-06 18:03:44,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:03:44,886 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 54 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:03:44,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 332 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 18:03:44,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-06 18:03:44,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 102. [2021-12-06 18:03:44,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 63 states have (on average 1.6349206349206349) internal successors, (103), 89 states have internal predecessors, (103), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-06 18:03:44,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 117 transitions. [2021-12-06 18:03:44,892 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 117 transitions. Word has length 14 [2021-12-06 18:03:44,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:03:44,892 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 117 transitions. [2021-12-06 18:03:44,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:03:44,892 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 117 transitions. [2021-12-06 18:03:44,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 18:03:44,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:03:44,893 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:03:44,900 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-06 18:03:45,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:03:45,094 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting list_add_tailErr0REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-06 18:03:45,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:03:45,097 INFO L85 PathProgramCache]: Analyzing trace with hash -70636769, now seen corresponding path program 1 times [2021-12-06 18:03:45,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:03:45,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1310444854] [2021-12-06 18:03:45,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:03:45,100 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:03:45,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:03:45,102 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:03:45,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-06 18:03:45,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:03:45,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 18:03:45,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:03:45,194 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 [2021-12-06 18:03:45,233 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-06 18:03:45,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 24 [2021-12-06 18:03:45,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:03:45,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:03:45,317 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:03:45,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1310444854] [2021-12-06 18:03:45,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1310444854] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:03:45,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:03:45,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:03:45,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370617786] [2021-12-06 18:03:45,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:03:45,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 18:03:45,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:03:45,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 18:03:45,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:03:45,318 INFO L87 Difference]: Start difference. First operand 102 states and 117 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:03:45,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:03:45,490 INFO L93 Difference]: Finished difference Result 124 states and 144 transitions. [2021-12-06 18:03:45,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 18:03:45,490 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-06 18:03:45,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:03:45,491 INFO L225 Difference]: With dead ends: 124 [2021-12-06 18:03:45,491 INFO L226 Difference]: Without dead ends: 124 [2021-12-06 18:03:45,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:03:45,492 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 11 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:03:45,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 357 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 100 Invalid, 0 Unknown, 128 Unchecked, 0.1s Time] [2021-12-06 18:03:45,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-06 18:03:45,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 114. [2021-12-06 18:03:45,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 73 states have (on average 1.5616438356164384) internal successors, (114), 99 states have internal predecessors, (114), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 18:03:45,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 132 transitions. [2021-12-06 18:03:45,498 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 132 transitions. Word has length 14 [2021-12-06 18:03:45,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:03:45,499 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 132 transitions. [2021-12-06 18:03:45,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:03:45,499 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 132 transitions. [2021-12-06 18:03:45,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 18:03:45,499 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:03:45,499 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:03:45,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-06 18:03:45,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:03:45,701 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting list_add_tailErr2REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-06 18:03:45,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:03:45,703 INFO L85 PathProgramCache]: Analyzing trace with hash 837542848, now seen corresponding path program 1 times [2021-12-06 18:03:45,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:03:45,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1157439315] [2021-12-06 18:03:45,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:03:45,705 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:03:45,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:03:45,707 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:03:45,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-06 18:03:45,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:03:45,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 18:03:45,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:03:45,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:03:45,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:03:45,860 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:03:45,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1157439315] [2021-12-06 18:03:45,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1157439315] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:03:45,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:03:45,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:03:45,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52634737] [2021-12-06 18:03:45,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:03:45,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:03:45,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:03:45,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:03:45,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:03:45,861 INFO L87 Difference]: Start difference. First operand 114 states and 132 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:03:45,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:03:45,955 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2021-12-06 18:03:45,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:03:45,956 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-06 18:03:45,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:03:45,956 INFO L225 Difference]: With dead ends: 113 [2021-12-06 18:03:45,956 INFO L226 Difference]: Without dead ends: 113 [2021-12-06 18:03:45,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:03:45,957 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 27 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:03:45,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 169 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:03:45,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-06 18:03:45,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-12-06 18:03:45,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 73 states have (on average 1.5342465753424657) internal successors, (112), 98 states have internal predecessors, (112), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 18:03:45,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 130 transitions. [2021-12-06 18:03:45,962 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 130 transitions. Word has length 16 [2021-12-06 18:03:45,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:03:45,962 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 130 transitions. [2021-12-06 18:03:45,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:03:45,963 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 130 transitions. [2021-12-06 18:03:45,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 18:03:45,963 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:03:45,963 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:03:45,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-06 18:03:46,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:03:46,165 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting list_add_tailErr3REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-06 18:03:46,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:03:46,166 INFO L85 PathProgramCache]: Analyzing trace with hash 837542849, now seen corresponding path program 1 times [2021-12-06 18:03:46,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:03:46,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1403785720] [2021-12-06 18:03:46,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:03:46,168 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:03:46,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:03:46,170 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:03:46,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-06 18:03:46,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:03:46,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 18:03:46,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:03:46,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:03:46,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:03:46,368 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:03:46,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1403785720] [2021-12-06 18:03:46,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1403785720] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:03:46,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:03:46,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 18:03:46,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832471647] [2021-12-06 18:03:46,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:03:46,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:03:46,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:03:46,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:03:46,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:03:46,369 INFO L87 Difference]: Start difference. First operand 113 states and 130 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:03:46,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:03:46,710 INFO L93 Difference]: Finished difference Result 121 states and 130 transitions. [2021-12-06 18:03:46,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 18:03:46,710 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-06 18:03:46,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:03:46,711 INFO L225 Difference]: With dead ends: 121 [2021-12-06 18:03:46,712 INFO L226 Difference]: Without dead ends: 121 [2021-12-06 18:03:46,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-12-06 18:03:46,713 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 86 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:03:46,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 588 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:03:46,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-06 18:03:46,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 113. [2021-12-06 18:03:46,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 73 states have (on average 1.5205479452054795) internal successors, (111), 98 states have internal predecessors, (111), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 18:03:46,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 129 transitions. [2021-12-06 18:03:46,718 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 129 transitions. Word has length 16 [2021-12-06 18:03:46,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:03:46,719 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 129 transitions. [2021-12-06 18:03:46,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:03:46,719 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 129 transitions. [2021-12-06 18:03:46,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 18:03:46,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:03:46,719 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:03:46,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-06 18:03:46,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:03:46,921 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting list_add_tailErr4REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-06 18:03:46,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:03:46,922 INFO L85 PathProgramCache]: Analyzing trace with hash 194024551, now seen corresponding path program 1 times [2021-12-06 18:03:46,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:03:46,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1607829155] [2021-12-06 18:03:46,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:03:46,925 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:03:46,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:03:46,927 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:03:46,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-06 18:03:47,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:03:47,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 18:03:47,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:03:47,087 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 [2021-12-06 18:03:47,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:03:47,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:03:47,113 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:03:47,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1607829155] [2021-12-06 18:03:47,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1607829155] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:03:47,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:03:47,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:03:47,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023553428] [2021-12-06 18:03:47,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:03:47,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:03:47,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:03:47,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:03:47,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:03:47,115 INFO L87 Difference]: Start difference. First operand 113 states and 129 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:03:47,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:03:47,332 INFO L93 Difference]: Finished difference Result 129 states and 142 transitions. [2021-12-06 18:03:47,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:03:47,332 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-06 18:03:47,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:03:47,333 INFO L225 Difference]: With dead ends: 129 [2021-12-06 18:03:47,333 INFO L226 Difference]: Without dead ends: 129 [2021-12-06 18:03:47,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:03:47,334 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 51 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:03:47,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 250 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:03:47,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-12-06 18:03:47,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 122. [2021-12-06 18:03:47,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 82 states have (on average 1.5121951219512195) internal successors, (124), 106 states have internal predecessors, (124), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 18:03:47,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 142 transitions. [2021-12-06 18:03:47,338 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 142 transitions. Word has length 17 [2021-12-06 18:03:47,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:03:47,338 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 142 transitions. [2021-12-06 18:03:47,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:03:47,339 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 142 transitions. [2021-12-06 18:03:47,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 18:03:47,339 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:03:47,339 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:03:47,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-06 18:03:47,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:03:47,541 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting list_add_tailErr5REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-06 18:03:47,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:03:47,542 INFO L85 PathProgramCache]: Analyzing trace with hash 194024552, now seen corresponding path program 1 times [2021-12-06 18:03:47,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:03:47,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [236744722] [2021-12-06 18:03:47,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:03:47,544 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:03:47,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:03:47,547 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:03:47,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-06 18:03:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:03:47,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 18:03:47,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:03:47,656 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 [2021-12-06 18:03:47,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:03:47,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:03:47,723 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:03:47,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [236744722] [2021-12-06 18:03:47,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [236744722] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:03:47,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:03:47,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:03:47,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615753012] [2021-12-06 18:03:47,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:03:47,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:03:47,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:03:47,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:03:47,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:03:47,724 INFO L87 Difference]: Start difference. First operand 122 states and 142 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:03:48,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:03:48,004 INFO L93 Difference]: Finished difference Result 127 states and 138 transitions. [2021-12-06 18:03:48,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:03:48,005 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-06 18:03:48,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:03:48,006 INFO L225 Difference]: With dead ends: 127 [2021-12-06 18:03:48,006 INFO L226 Difference]: Without dead ends: 127 [2021-12-06 18:03:48,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:03:48,006 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 38 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:03:48,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 271 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:03:48,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-06 18:03:48,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 122. [2021-12-06 18:03:48,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 82 states have (on average 1.4634146341463414) internal successors, (120), 106 states have internal predecessors, (120), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 18:03:48,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 138 transitions. [2021-12-06 18:03:48,010 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 138 transitions. Word has length 17 [2021-12-06 18:03:48,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:03:48,011 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 138 transitions. [2021-12-06 18:03:48,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:03:48,011 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 138 transitions. [2021-12-06 18:03:48,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 18:03:48,011 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:03:48,011 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:03:48,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-06 18:03:48,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:03:48,213 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting list_add_tailErr8REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-06 18:03:48,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:03:48,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1774001130, now seen corresponding path program 1 times [2021-12-06 18:03:48,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:03:48,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2110310495] [2021-12-06 18:03:48,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:03:48,216 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:03:48,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:03:48,217 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:03:48,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-06 18:03:48,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:03:48,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 18:03:48,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:03:48,375 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 [2021-12-06 18:03:48,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:03:48,429 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-06 18:03:48,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:03:48,451 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:03:48,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-06 18:03:48,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:03:48,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 18:03:48,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:03:48,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:03:48,583 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:03:48,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2110310495] [2021-12-06 18:03:48,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2110310495] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:03:48,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:03:48,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-06 18:03:48,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332387109] [2021-12-06 18:03:48,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:03:48,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 18:03:48,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:03:48,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 18:03:48,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-12-06 18:03:48,584 INFO L87 Difference]: Start difference. First operand 122 states and 138 transitions. Second operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:03:49,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:03:49,225 INFO L93 Difference]: Finished difference Result 145 states and 163 transitions. [2021-12-06 18:03:49,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:03:49,225 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-06 18:03:49,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:03:49,227 INFO L225 Difference]: With dead ends: 145 [2021-12-06 18:03:49,227 INFO L226 Difference]: Without dead ends: 145 [2021-12-06 18:03:49,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-12-06 18:03:49,227 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 59 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:03:49,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 408 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 18:03:49,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-12-06 18:03:49,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 132. [2021-12-06 18:03:49,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 92 states have (on average 1.4456521739130435) internal successors, (133), 116 states have internal predecessors, (133), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 18:03:49,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 151 transitions. [2021-12-06 18:03:49,232 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 151 transitions. Word has length 19 [2021-12-06 18:03:49,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:03:49,232 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 151 transitions. [2021-12-06 18:03:49,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:03:49,232 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 151 transitions. [2021-12-06 18:03:49,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 18:03:49,233 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:03:49,233 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:03:49,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-06 18:03:49,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:03:49,434 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting list_add_tailErr9REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-06 18:03:49,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:03:49,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1774001131, now seen corresponding path program 1 times [2021-12-06 18:03:49,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:03:49,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [844433641] [2021-12-06 18:03:49,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:03:49,437 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:03:49,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:03:49,439 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:03:49,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-06 18:03:49,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:03:49,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-06 18:03:49,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:03:49,619 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 [2021-12-06 18:03:49,624 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 [2021-12-06 18:03:49,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:03:49,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:03:49,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:03:49,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:03:49,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:03:49,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:03:49,761 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:03:49,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-06 18:03:49,774 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:03:49,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-06 18:03:49,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 18:03:49,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 18:03:49,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:03:49,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:03:49,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:03:49,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:03:49,955 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:03:49,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [844433641] [2021-12-06 18:03:49,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [844433641] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:03:49,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:03:49,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-06 18:03:49,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801244930] [2021-12-06 18:03:49,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:03:49,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 18:03:49,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:03:49,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 18:03:49,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-12-06 18:03:49,956 INFO L87 Difference]: Start difference. First operand 132 states and 151 transitions. Second operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:03:50,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:03:50,748 INFO L93 Difference]: Finished difference Result 135 states and 152 transitions. [2021-12-06 18:03:50,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 18:03:50,749 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-06 18:03:50,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:03:50,750 INFO L225 Difference]: With dead ends: 135 [2021-12-06 18:03:50,750 INFO L226 Difference]: Without dead ends: 135 [2021-12-06 18:03:50,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-12-06 18:03:50,751 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 31 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:03:50,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 477 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 18:03:50,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-06 18:03:50,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2021-12-06 18:03:50,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 94 states have (on average 1.425531914893617) internal successors, (134), 119 states have internal predecessors, (134), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 18:03:50,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 152 transitions. [2021-12-06 18:03:50,756 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 152 transitions. Word has length 19 [2021-12-06 18:03:50,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:03:50,756 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 152 transitions. [2021-12-06 18:03:50,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:03:50,756 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 152 transitions. [2021-12-06 18:03:50,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 18:03:50,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:03:50,757 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:03:50,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-06 18:03:50,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:03:50,958 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting create_sub_listErr1REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-06 18:03:50,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:03:50,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1031850971, now seen corresponding path program 1 times [2021-12-06 18:03:50,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:03:50,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1397562327] [2021-12-06 18:03:50,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:03:50,962 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:03:50,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:03:50,964 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:03:50,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-06 18:03:51,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:03:51,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 18:03:51,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:03:51,122 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 [2021-12-06 18:03:51,126 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 [2021-12-06 18:03:51,202 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 [2021-12-06 18:03:51,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:03:51,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 18:03:51,258 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:03:51,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-06 18:03:51,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:03:51,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:03:53,662 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:03:53,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1397562327] [2021-12-06 18:03:53,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1397562327] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:03:53,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [629703066] [2021-12-06 18:03:53,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:03:53,663 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 18:03:53,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 18:03:53,663 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 18:03:53,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-12-06 18:03:53,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:03:53,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 18:03:53,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:03:53,971 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 [2021-12-06 18:03:53,977 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 [2021-12-06 18:03:54,143 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 [2021-12-06 18:03:54,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:03:54,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 18:03:54,482 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:03:54,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-12-06 18:03:54,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:03:54,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:03:55,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [629703066] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:03:55,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:03:55,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12] total 13 [2021-12-06 18:03:55,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348536598] [2021-12-06 18:03:55,140 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:03:55,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 18:03:55,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:03:55,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 18:03:55,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=295, Unknown=1, NotChecked=0, Total=342 [2021-12-06 18:03:55,141 INFO L87 Difference]: Start difference. First operand 135 states and 152 transitions. Second operand has 14 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-06 18:04:04,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:04:04,225 INFO L93 Difference]: Finished difference Result 163 states and 186 transitions. [2021-12-06 18:04:04,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 18:04:04,226 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2021-12-06 18:04:04,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:04:04,227 INFO L225 Difference]: With dead ends: 163 [2021-12-06 18:04:04,227 INFO L226 Difference]: Without dead ends: 163 [2021-12-06 18:04:04,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=78, Invalid=469, Unknown=5, NotChecked=0, Total=552 [2021-12-06 18:04:04,228 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 76 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:04:04,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 350 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 475 Invalid, 0 Unknown, 173 Unchecked, 0.8s Time] [2021-12-06 18:04:04,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-12-06 18:04:04,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 143. [2021-12-06 18:04:04,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 100 states have (on average 1.41) internal successors, (141), 124 states have internal predecessors, (141), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2021-12-06 18:04:04,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 162 transitions. [2021-12-06 18:04:04,233 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 162 transitions. Word has length 29 [2021-12-06 18:04:04,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:04:04,233 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 162 transitions. [2021-12-06 18:04:04,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-06 18:04:04,233 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 162 transitions. [2021-12-06 18:04:04,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 18:04:04,234 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:04:04,234 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:04:04,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-06 18:04:04,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-12-06 18:04:04,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 18:04:04,636 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting list_add_tailErr0REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-06 18:04:04,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:04:04,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1350954673, now seen corresponding path program 1 times [2021-12-06 18:04:04,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:04:04,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [236945734] [2021-12-06 18:04:04,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:04:04,639 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:04:04,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:04:04,642 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:04:04,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-06 18:04:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:04:04,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 18:04:04,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:04:04,852 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 [2021-12-06 18:04:04,922 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-06 18:04:04,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 19 [2021-12-06 18:04:04,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:04:04,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:04:05,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:04:05,155 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:04:05,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [236945734] [2021-12-06 18:04:05,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [236945734] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:04:05,155 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:04:05,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-12-06 18:04:05,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727891394] [2021-12-06 18:04:05,155 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:04:05,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:04:05,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:04:05,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:04:05,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:04:05,156 INFO L87 Difference]: Start difference. First operand 143 states and 162 transitions. Second operand has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 18:04:05,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:04:05,604 INFO L93 Difference]: Finished difference Result 144 states and 160 transitions. [2021-12-06 18:04:05,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:04:05,605 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2021-12-06 18:04:05,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:04:05,606 INFO L225 Difference]: With dead ends: 144 [2021-12-06 18:04:05,606 INFO L226 Difference]: Without dead ends: 144 [2021-12-06 18:04:05,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-12-06 18:04:05,606 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 55 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:04:05,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 431 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 18:04:05,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-12-06 18:04:05,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2021-12-06 18:04:05,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 100 states have (on average 1.39) internal successors, (139), 124 states have internal predecessors, (139), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2021-12-06 18:04:05,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 160 transitions. [2021-12-06 18:04:05,611 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 160 transitions. Word has length 30 [2021-12-06 18:04:05,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:04:05,611 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 160 transitions. [2021-12-06 18:04:05,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 18:04:05,611 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 160 transitions. [2021-12-06 18:04:05,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 18:04:05,612 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:04:05,612 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:04:05,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-06 18:04:05,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:04:05,813 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting list_add_tailErr1REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-06 18:04:05,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:04:05,815 INFO L85 PathProgramCache]: Analyzing trace with hash 343570640, now seen corresponding path program 1 times [2021-12-06 18:04:05,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:04:05,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1558315030] [2021-12-06 18:04:05,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:04:05,818 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:04:05,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:04:05,818 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:04:05,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-06 18:04:06,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:04:06,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 18:04:06,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:04:06,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:06,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 18:04:06,560 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:04:06,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-06 18:04:06,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:04:06,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:04:08,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:04:08,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2021-12-06 18:04:08,866 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 18:04:08,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2021-12-06 18:04:08,881 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 18:04:08,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2021-12-06 18:04:09,765 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:04:09,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2021-12-06 18:04:09,894 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 18:04:09,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2021-12-06 18:04:10,159 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:04:10,159 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:04:10,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1558315030] [2021-12-06 18:04:10,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1558315030] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:04:10,160 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:04:10,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-12-06 18:04:10,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130769863] [2021-12-06 18:04:10,160 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:04:10,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 18:04:10,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:04:10,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 18:04:10,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2021-12-06 18:04:10,161 INFO L87 Difference]: Start difference. First operand 143 states and 160 transitions. Second operand has 31 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 25 states have internal predecessors, (58), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 18:04:14,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:04:14,292 INFO L93 Difference]: Finished difference Result 151 states and 164 transitions. [2021-12-06 18:04:14,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 18:04:14,293 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 25 states have internal predecessors, (58), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2021-12-06 18:04:14,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:04:14,294 INFO L225 Difference]: With dead ends: 151 [2021-12-06 18:04:14,294 INFO L226 Difference]: Without dead ends: 151 [2021-12-06 18:04:14,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=242, Invalid=1650, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 18:04:14,295 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 236 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 309 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:04:14,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 931 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 877 Invalid, 0 Unknown, 309 Unchecked, 2.6s Time] [2021-12-06 18:04:14,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-06 18:04:14,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 140. [2021-12-06 18:04:14,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 99 states have (on average 1.3333333333333333) internal successors, (132), 121 states have internal predecessors, (132), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2021-12-06 18:04:14,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 153 transitions. [2021-12-06 18:04:14,299 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 153 transitions. Word has length 36 [2021-12-06 18:04:14,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:04:14,299 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 153 transitions. [2021-12-06 18:04:14,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 25 states have internal predecessors, (58), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 18:04:14,300 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 153 transitions. [2021-12-06 18:04:14,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-06 18:04:14,300 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:04:14,300 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:04:14,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-12-06 18:04:14,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:04:14,502 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting list_add_tailErr8REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-06 18:04:14,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:04:14,503 INFO L85 PathProgramCache]: Analyzing trace with hash 2012582842, now seen corresponding path program 1 times [2021-12-06 18:04:14,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:04:14,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [549436091] [2021-12-06 18:04:14,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:04:14,505 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:04:14,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:04:14,507 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:04:14,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-06 18:04:14,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:04:14,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-06 18:04:14,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:04:14,957 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 [2021-12-06 18:04:15,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:04:15,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:04:15,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:15,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:04:15,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:15,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:04:15,110 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 18:04:15,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2021-12-06 18:04:15,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:04:15,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:04:15,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:04:15,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:04:16,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 36 [2021-12-06 18:04:16,473 INFO L354 Elim1Store]: treesize reduction 46, result has 19.3 percent of original size [2021-12-06 18:04:16,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 97 treesize of output 90 [2021-12-06 18:04:16,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:16,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 74 [2021-12-06 18:04:16,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 24 [2021-12-06 18:04:16,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 22 [2021-12-06 18:04:16,680 INFO L354 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2021-12-06 18:04:16,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 63 [2021-12-06 18:04:16,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-12-06 18:04:17,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2021-12-06 18:04:17,587 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:04:17,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:04:18,009 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_789 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_789) |c_create_sub_list_insert_sub_~head#1.base|) (bvadd |c_create_sub_list_insert_sub_~head#1.offset| (_ bv4 32)))))))))))))) is different from false [2021-12-06 18:04:18,064 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_create_sub_list_insert_sub_~sub~0#1.base_23| (_ BitVec 32)) (v_ArrVal_788 (_ BitVec 1)) (v_ArrVal_789 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_23| v_ArrVal_788) (select (select (store |c_#memory_$Pointer$.base| |v_create_sub_list_insert_sub_~sub~0#1.base_23| v_ArrVal_789) |c_create_sub_list_~sub#1.base|) (bvadd (_ bv4 32) |c_create_sub_list_~sub#1.offset|))))))))))) (_ bv1 1))) (not (= (bvadd (bvneg (bvneg (bvneg (bvneg v_ArrVal_788)))) (_ bv1 1)) (_ bv0 1))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_23|)))))) is different from false [2021-12-06 18:04:18,112 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_create_sub_list_insert_sub_~sub~0#1.base_23| (_ BitVec 32)) (v_ArrVal_788 (_ BitVec 1)) (v_ArrVal_789 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_23| v_ArrVal_788) (select (select (store |c_#memory_$Pointer$.base| |v_create_sub_list_insert_sub_~sub~0#1.base_23| v_ArrVal_789) |c_create_sub_list_~sub#1.base|) (bvadd (_ bv4 32) |c_create_sub_list_~sub#1.offset|))))))))))) (_ bv1 1))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg v_ArrVal_788))))) (_ bv1 1)))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_23|)))))) is different from false [2021-12-06 18:04:19,176 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:04:19,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [549436091] [2021-12-06 18:04:19,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [549436091] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:04:19,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1367040268] [2021-12-06 18:04:19,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:04:19,177 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 18:04:19,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 18:04:19,177 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 18:04:19,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-12-06 18:04:19,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:04:19,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-06 18:04:19,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:04:19,757 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 [2021-12-06 18:04:19,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:04:19,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:04:19,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:19,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:04:19,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:19,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:04:19,851 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 18:04:19,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 31 [2021-12-06 18:04:19,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:04:19,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:04:19,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:04:19,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:04:20,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 36 [2021-12-06 18:04:20,865 INFO L354 Elim1Store]: treesize reduction 46, result has 19.3 percent of original size [2021-12-06 18:04:20,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 97 treesize of output 90 [2021-12-06 18:04:20,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:20,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 74 [2021-12-06 18:04:20,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 24 [2021-12-06 18:04:20,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2021-12-06 18:04:21,007 INFO L354 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2021-12-06 18:04:21,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 63 [2021-12-06 18:04:21,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2021-12-06 18:04:21,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-12-06 18:04:21,912 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:04:21,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:04:22,325 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_create_sub_list_insert_sub_~sub~0#1.base_25| (_ BitVec 32)) (v_ArrVal_911 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_910 (_ BitVec 1))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_25| v_ArrVal_910) (select (select (store |c_#memory_$Pointer$.base| |v_create_sub_list_insert_sub_~sub~0#1.base_25| v_ArrVal_911) |c_create_sub_list_~sub#1.base|) (bvadd (_ bv4 32) |c_create_sub_list_~sub#1.offset|))))))))) (_ bv1 1))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_25|))))))) is different from false [2021-12-06 18:04:23,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1367040268] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:04:23,392 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:04:23,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 27 [2021-12-06 18:04:23,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421942800] [2021-12-06 18:04:23,392 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:04:23,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-06 18:04:23,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:04:23,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-06 18:04:23,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1147, Unknown=19, NotChecked=284, Total=1560 [2021-12-06 18:04:23,394 INFO L87 Difference]: Start difference. First operand 140 states and 153 transitions. Second operand has 28 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:04:24,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:04:24,557 INFO L93 Difference]: Finished difference Result 151 states and 166 transitions. [2021-12-06 18:04:24,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 18:04:24,558 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-12-06 18:04:24,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:04:24,559 INFO L225 Difference]: With dead ends: 151 [2021-12-06 18:04:24,559 INFO L226 Difference]: Without dead ends: 151 [2021-12-06 18:04:24,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 52 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=157, Invalid=1562, Unknown=19, NotChecked=332, Total=2070 [2021-12-06 18:04:24,560 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 23 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 494 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:04:24,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 724 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 275 Invalid, 0 Unknown, 494 Unchecked, 0.6s Time] [2021-12-06 18:04:24,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-06 18:04:24,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-12-06 18:04:24,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 109 states have (on average 1.311926605504587) internal successors, (143), 131 states have internal predecessors, (143), 11 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (12), 9 states have call predecessors, (12), 11 states have call successors, (12) [2021-12-06 18:04:24,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 166 transitions. [2021-12-06 18:04:24,564 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 166 transitions. Word has length 35 [2021-12-06 18:04:24,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:04:24,565 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 166 transitions. [2021-12-06 18:04:24,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 1.64) internal successors, (41), 24 states have internal predecessors, (41), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:04:24,565 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 166 transitions. [2021-12-06 18:04:24,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-06 18:04:24,565 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:04:24,566 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:04:24,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-12-06 18:04:24,801 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-12-06 18:04:24,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:04:24,968 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting list_add_tailErr9REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-06 18:04:24,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:04:24,969 INFO L85 PathProgramCache]: Analyzing trace with hash 2012582843, now seen corresponding path program 1 times [2021-12-06 18:04:24,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:04:24,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [561135603] [2021-12-06 18:04:24,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:04:24,971 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:04:24,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:04:24,972 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:04:24,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-06 18:04:25,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:04:25,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 95 conjunts are in the unsatisfiable core [2021-12-06 18:04:25,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:04:25,384 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 [2021-12-06 18:04:25,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:04:25,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:04:25,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:25,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:04:25,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:25,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:04:25,526 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 [2021-12-06 18:04:25,553 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 18:04:25,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2021-12-06 18:04:25,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:04:25,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:04:25,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:04:25,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:04:27,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 79 [2021-12-06 18:04:27,553 INFO L354 Elim1Store]: treesize reduction 46, result has 19.3 percent of original size [2021-12-06 18:04:27,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 163 treesize of output 150 [2021-12-06 18:04:27,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 60 [2021-12-06 18:04:27,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:27,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 84 [2021-12-06 18:04:27,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:27,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 27 [2021-12-06 18:04:27,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:27,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2021-12-06 18:04:27,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 22 [2021-12-06 18:04:27,869 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-06 18:04:27,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2021-12-06 18:04:27,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:04:28,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2021-12-06 18:04:28,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 18:04:28,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-06 18:04:28,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:04:28,553 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:04:28,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:04:29,651 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1041 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1040 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (bvadd |c_create_sub_list_insert_sub_~head#1.offset| (_ bv4 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1040) |c_create_sub_list_insert_sub_~head#1.base|) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1041) |c_create_sub_list_insert_sub_~head#1.base|) .cse0))))) (forall ((v_ArrVal_1040 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1040) |c_create_sub_list_insert_sub_~head#1.base|) (bvadd |c_create_sub_list_insert_sub_~head#1.offset| (_ bv4 32))))) (bvule .cse1 (bvadd (_ bv4 32) .cse1))))) is different from false [2021-12-06 18:04:29,770 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_create_sub_list_insert_sub_~sub~0#1.base_27| (_ BitVec 32))) (or (and (forall ((v_ArrVal_1040 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |v_create_sub_list_insert_sub_~sub~0#1.base_27| v_ArrVal_1040) |c_create_sub_list_~sub#1.base|) (bvadd (_ bv4 32) |c_create_sub_list_~sub#1.offset|)))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((v_ArrVal_1041 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1039 (_ BitVec 32)) (v_ArrVal_1040 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (bvadd (_ bv4 32) |c_create_sub_list_~sub#1.offset|))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |v_create_sub_list_insert_sub_~sub~0#1.base_27| v_ArrVal_1040) |c_create_sub_list_~sub#1.base|) .cse1)) (select (store |c_#length| |v_create_sub_list_insert_sub_~sub~0#1.base_27| v_ArrVal_1039) (select (select (store |c_#memory_$Pointer$.base| |v_create_sub_list_insert_sub_~sub~0#1.base_27| v_ArrVal_1041) |c_create_sub_list_~sub#1.base|) .cse1)))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_27|)))))) is different from false [2021-12-06 18:04:36,408 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:04:36,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [561135603] [2021-12-06 18:04:36,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [561135603] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:04:36,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1890693858] [2021-12-06 18:04:36,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:04:36,409 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 18:04:36,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 18:04:36,410 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 18:04:36,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-12-06 18:04:37,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:04:37,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 100 conjunts are in the unsatisfiable core [2021-12-06 18:04:37,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:04:37,310 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 [2021-12-06 18:04:37,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:04:37,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:04:37,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:37,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:04:37,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:37,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:04:37,414 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 18:04:37,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2021-12-06 18:04:37,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 18:04:37,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:04:37,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:04:37,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:04:37,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:04:41,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 88 [2021-12-06 18:04:41,547 INFO L354 Elim1Store]: treesize reduction 46, result has 19.3 percent of original size [2021-12-06 18:04:41,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 163 treesize of output 150 [2021-12-06 18:04:41,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:41,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 122 [2021-12-06 18:04:41,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 62 [2021-12-06 18:04:41,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:41,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 27 [2021-12-06 18:04:41,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:41,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2021-12-06 18:04:41,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2021-12-06 18:04:41,752 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-06 18:04:41,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2021-12-06 18:04:41,787 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-06 18:04:41,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 39 [2021-12-06 18:04:41,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 18:04:41,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2021-12-06 18:04:41,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-06 18:04:42,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:04:42,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:04:42,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:04:42,328 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1180 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1180) |c_create_sub_list_insert_sub_~head#1.base|) (bvadd |c_create_sub_list_insert_sub_~head#1.offset| (_ bv4 32))))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((v_ArrVal_1180 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1181 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (bvadd |c_create_sub_list_insert_sub_~head#1.offset| (_ bv4 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1180) |c_create_sub_list_insert_sub_~head#1.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1181) |c_create_sub_list_insert_sub_~head#1.base|) .cse1)))))) is different from false [2021-12-06 18:04:42,444 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_create_sub_list_insert_sub_~sub~0#1.base_29| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_29|))))) (and (forall ((v_ArrVal_1180 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |v_create_sub_list_insert_sub_~sub~0#1.base_29| v_ArrVal_1180) |c_create_sub_list_~sub#1.base|) (bvadd (_ bv4 32) |c_create_sub_list_~sub#1.offset|)))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((v_ArrVal_1179 (_ BitVec 32)) (v_ArrVal_1180 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1181 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (bvadd (_ bv4 32) |c_create_sub_list_~sub#1.offset|))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |v_create_sub_list_insert_sub_~sub~0#1.base_29| v_ArrVal_1180) |c_create_sub_list_~sub#1.base|) .cse1)) (select (store |c_#length| |v_create_sub_list_insert_sub_~sub~0#1.base_29| v_ArrVal_1179) (select (select (store |c_#memory_$Pointer$.base| |v_create_sub_list_insert_sub_~sub~0#1.base_29| v_ArrVal_1181) |c_create_sub_list_~sub#1.base|) .cse1)))))))) is different from false [2021-12-06 18:04:48,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1890693858] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:04:48,856 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:04:48,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 28 [2021-12-06 18:04:48,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628787717] [2021-12-06 18:04:48,856 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:04:48,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 18:04:48,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:04:48,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 18:04:48,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1148, Unknown=21, NotChecked=284, Total=1560 [2021-12-06 18:04:48,857 INFO L87 Difference]: Start difference. First operand 151 states and 166 transitions. Second operand has 29 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 26 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:04:54,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:04:54,356 INFO L93 Difference]: Finished difference Result 154 states and 167 transitions. [2021-12-06 18:04:54,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 18:04:54,357 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 26 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2021-12-06 18:04:54,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:04:54,358 INFO L225 Difference]: With dead ends: 154 [2021-12-06 18:04:54,358 INFO L226 Difference]: Without dead ends: 154 [2021-12-06 18:04:54,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=182, Invalid=1883, Unknown=21, NotChecked=364, Total=2450 [2021-12-06 18:04:54,359 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 36 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 586 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:04:54,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 839 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 404 Invalid, 0 Unknown, 586 Unchecked, 1.1s Time] [2021-12-06 18:04:54,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-12-06 18:04:54,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2021-12-06 18:04:54,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 111 states have (on average 1.2972972972972974) internal successors, (144), 134 states have internal predecessors, (144), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (12), 9 states have call predecessors, (12), 11 states have call successors, (12) [2021-12-06 18:04:54,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 167 transitions. [2021-12-06 18:04:54,364 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 167 transitions. Word has length 35 [2021-12-06 18:04:54,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:04:54,364 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 167 transitions. [2021-12-06 18:04:54,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 26 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:04:54,365 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 167 transitions. [2021-12-06 18:04:54,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 18:04:54,365 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:04:54,365 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:04:54,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-06 18:04:54,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-12-06 18:04:54,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 18:04:54,767 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting list_add_tailErr9REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-06 18:04:54,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:04:54,768 INFO L85 PathProgramCache]: Analyzing trace with hash -796271557, now seen corresponding path program 1 times [2021-12-06 18:04:54,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:04:54,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1173210000] [2021-12-06 18:04:54,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:04:54,770 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:04:54,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:04:54,772 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:04:54,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-06 18:04:55,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:04:55,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-06 18:04:55,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:04:55,105 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 [2021-12-06 18:04:55,112 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 [2021-12-06 18:04:55,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:04:55,291 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-06 18:04:55,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:04:55,428 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:04:55,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-06 18:04:55,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:04:55,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-06 18:04:55,576 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 [2021-12-06 18:04:55,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-06 18:04:55,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:55,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 18:04:55,937 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:04:55,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-06 18:04:56,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:04:56,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:04:56,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:56,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:04:56,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:04:56,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:04:56,238 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:04:56,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-06 18:04:56,261 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:04:56,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-06 18:04:56,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:04:56,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:04:56,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:04:56,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:04:56,862 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:04:56,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:04:57,704 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1325 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1325) |c_create_sub_list_insert_sub_~head#1.base|) (bvadd |c_create_sub_list_insert_sub_~head#1.offset| (_ bv4 32))))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((v_ArrVal_1325 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1326 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (bvadd |c_create_sub_list_insert_sub_~head#1.offset| (_ bv4 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1325) |c_create_sub_list_insert_sub_~head#1.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1326) |c_create_sub_list_insert_sub_~head#1.base|) .cse1)))))) is different from false [2021-12-06 18:05:01,069 INFO L354 Elim1Store]: treesize reduction 23, result has 45.2 percent of original size [2021-12-06 18:05:01,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 110 [2021-12-06 18:05:01,088 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-06 18:05:01,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 153 treesize of output 137 [2021-12-06 18:05:01,170 INFO L354 Elim1Store]: treesize reduction 46, result has 44.6 percent of original size [2021-12-06 18:05:01,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 137 treesize of output 121 [2021-12-06 18:05:01,183 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-06 18:05:01,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 167 treesize of output 145 [2021-12-06 18:05:01,204 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-06 18:05:01,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 162 treesize of output 140 [2021-12-06 18:05:01,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 107 [2021-12-06 18:05:01,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 99 [2021-12-06 18:05:01,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 91 [2021-12-06 18:05:05,658 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 18:05:05,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-12-06 18:05:08,602 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:05:08,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1173210000] [2021-12-06 18:05:08,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1173210000] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:05:08,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [409991890] [2021-12-06 18:05:08,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:05:08,602 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 18:05:08,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 18:05:08,603 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 18:05:08,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-12-06 18:05:09,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:05:09,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-06 18:05:09,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:05:09,882 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 [2021-12-06 18:05:09,887 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 [2021-12-06 18:05:10,161 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 [2021-12-06 18:05:10,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:05:10,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 18:05:10,554 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:05:10,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-06 18:05:10,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:05:10,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:05:10,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:05:10,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:05:10,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:05:10,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:05:10,677 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:05:10,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-06 18:05:10,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 18:05:10,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:05:10,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:05:10,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:05:10,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:05:11,019 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:05:11,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:05:11,161 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1452 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1453 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (bvadd |c_create_sub_list_insert_sub_~head#1.offset| (_ bv4 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1453) |c_create_sub_list_insert_sub_~head#1.base|) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1452) |c_create_sub_list_insert_sub_~head#1.base|) .cse0))))) (forall ((v_ArrVal_1453 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1453) |c_create_sub_list_insert_sub_~head#1.base|) (bvadd |c_create_sub_list_insert_sub_~head#1.offset| (_ bv4 32))))) (bvule .cse1 (bvadd (_ bv4 32) .cse1))))) is different from false [2021-12-06 18:05:11,288 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_create_sub_list_insert_sub_~sub~0#1.base_35| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_35|))))) (and (forall ((v_ArrVal_1452 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1453 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1451 (_ BitVec 32))) (let ((.cse0 (bvadd (_ bv4 32) |c_create_sub_list_~sub#1.offset|))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |v_create_sub_list_insert_sub_~sub~0#1.base_35| v_ArrVal_1453) |c_create_sub_list_~sub#1.base|) .cse0)) (select (store |c_#length| |v_create_sub_list_insert_sub_~sub~0#1.base_35| v_ArrVal_1451) (select (select (store |c_#memory_$Pointer$.base| |v_create_sub_list_insert_sub_~sub~0#1.base_35| v_ArrVal_1452) |c_create_sub_list_~sub#1.base|) .cse0))))) (forall ((v_ArrVal_1453 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |v_create_sub_list_insert_sub_~sub~0#1.base_35| v_ArrVal_1453) |c_create_sub_list_~sub#1.base|) (bvadd (_ bv4 32) |c_create_sub_list_~sub#1.offset|)))) (bvule .cse1 (bvadd (_ bv4 32) .cse1))))))) is different from false [2021-12-06 18:05:11,389 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_create_sub_list_insert_sub_~sub~0#1.base_35| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_35|))))) (and (forall ((v_ArrVal_1448 (_ BitVec 32)) (v_ArrVal_1452 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1447 (_ BitVec 32)) (v_ArrVal_1453 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1451 (_ BitVec 32))) (let ((.cse0 (bvadd (_ bv4 32) |c_create_sub_list_~sub#1.offset|))) (bvule (bvadd (_ bv4 32) (select (select (store (store |c_#memory_$Pointer$.offset| |c_create_sub_list_~sub#1.base| (store (select |c_#memory_$Pointer$.offset| |c_create_sub_list_~sub#1.base|) |c_create_sub_list_~sub#1.offset| v_ArrVal_1447)) |v_create_sub_list_insert_sub_~sub~0#1.base_35| v_ArrVal_1453) |c_create_sub_list_~sub#1.base|) .cse0)) (select (store |c_#length| |v_create_sub_list_insert_sub_~sub~0#1.base_35| v_ArrVal_1451) (select (select (store (store |c_#memory_$Pointer$.base| |c_create_sub_list_~sub#1.base| (store (select |c_#memory_$Pointer$.base| |c_create_sub_list_~sub#1.base|) |c_create_sub_list_~sub#1.offset| v_ArrVal_1448)) |v_create_sub_list_insert_sub_~sub~0#1.base_35| v_ArrVal_1452) |c_create_sub_list_~sub#1.base|) .cse0))))) (forall ((v_ArrVal_1447 (_ BitVec 32)) (v_ArrVal_1453 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store (store |c_#memory_$Pointer$.offset| |c_create_sub_list_~sub#1.base| (store (select |c_#memory_$Pointer$.offset| |c_create_sub_list_~sub#1.base|) |c_create_sub_list_~sub#1.offset| v_ArrVal_1447)) |v_create_sub_list_insert_sub_~sub~0#1.base_35| v_ArrVal_1453) |c_create_sub_list_~sub#1.base|) (bvadd (_ bv4 32) |c_create_sub_list_~sub#1.offset|)))) (bvule .cse1 (bvadd (_ bv4 32) .cse1))))))) is different from false [2021-12-06 18:05:11,460 INFO L354 Elim1Store]: treesize reduction 23, result has 45.2 percent of original size [2021-12-06 18:05:11,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 110 [2021-12-06 18:05:11,476 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-06 18:05:11,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 153 treesize of output 137 [2021-12-06 18:05:11,579 INFO L354 Elim1Store]: treesize reduction 46, result has 44.6 percent of original size [2021-12-06 18:05:11,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 137 treesize of output 121 [2021-12-06 18:05:11,596 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-06 18:05:11,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 167 treesize of output 145 [2021-12-06 18:05:11,619 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-06 18:05:11,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 162 treesize of output 140 [2021-12-06 18:05:11,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 107 [2021-12-06 18:05:11,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 99 [2021-12-06 18:05:11,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 91 [2021-12-06 18:05:18,671 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 18:05:18,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:05:24,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [409991890] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:05:24,876 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:05:24,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 25 [2021-12-06 18:05:24,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589572934] [2021-12-06 18:05:24,877 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:05:24,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 18:05:24,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:05:24,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 18:05:24,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1277, Unknown=30, NotChecked=300, Total=1722 [2021-12-06 18:05:24,878 INFO L87 Difference]: Start difference. First operand 154 states and 167 transitions. Second operand has 26 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:05:29,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:05:29,703 INFO L93 Difference]: Finished difference Result 187 states and 204 transitions. [2021-12-06 18:05:29,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 18:05:29,703 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 41 [2021-12-06 18:05:29,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:05:29,705 INFO L225 Difference]: With dead ends: 187 [2021-12-06 18:05:29,705 INFO L226 Difference]: Without dead ends: 187 [2021-12-06 18:05:29,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 26.1s TimeCoverageRelationStatistics Valid=318, Invalid=2747, Unknown=31, NotChecked=444, Total=3540 [2021-12-06 18:05:29,706 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 104 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:05:29,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 520 Invalid, 1296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1083 Invalid, 0 Unknown, 184 Unchecked, 2.3s Time] [2021-12-06 18:05:29,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-06 18:05:29,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 169. [2021-12-06 18:05:29,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 124 states have (on average 1.2661290322580645) internal successors, (157), 148 states have internal predecessors, (157), 12 states have call successors, (12), 11 states have call predecessors, (12), 10 states have return successors, (13), 9 states have call predecessors, (13), 12 states have call successors, (13) [2021-12-06 18:05:29,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 182 transitions. [2021-12-06 18:05:29,711 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 182 transitions. Word has length 41 [2021-12-06 18:05:29,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:05:29,712 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 182 transitions. [2021-12-06 18:05:29,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 18:05:29,712 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 182 transitions. [2021-12-06 18:05:29,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 18:05:29,712 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:05:29,712 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:05:29,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2021-12-06 18:05:29,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-12-06 18:05:30,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:05:30,114 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting create_sub_listErr1REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-06 18:05:30,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:05:30,116 INFO L85 PathProgramCache]: Analyzing trace with hash 782352299, now seen corresponding path program 1 times [2021-12-06 18:05:30,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:05:30,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [220376890] [2021-12-06 18:05:30,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:05:30,118 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:05:30,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:05:30,119 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:05:30,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-06 18:05:30,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:05:30,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-06 18:05:30,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:05:30,482 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 [2021-12-06 18:05:30,488 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 [2021-12-06 18:05:30,674 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 [2021-12-06 18:05:30,882 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:05:30,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-06 18:05:39,145 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:05:39,146 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:05:39,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-06 18:05:39,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:05:39,403 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:05:39,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2021-12-06 18:05:39,423 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:05:39,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-12-06 18:05:39,595 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:05:39,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:05:40,173 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 18:05:40,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:05:40,764 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:05:40,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [220376890] [2021-12-06 18:05:40,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [220376890] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:05:40,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [578557151] [2021-12-06 18:05:40,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:05:40,764 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 18:05:40,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 18:05:40,765 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 18:05:40,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-12-06 18:05:41,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:05:41,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-06 18:05:41,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:05:41,316 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 [2021-12-06 18:05:41,323 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 [2021-12-06 18:05:45,637 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 [2021-12-06 18:05:47,882 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:05:47,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-06 18:05:48,215 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:05:48,216 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:05:48,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 18:05:49,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:05:49,034 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:05:49,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2021-12-06 18:05:49,052 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:05:49,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-06 18:05:49,124 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:05:49,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:05:49,886 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 18:05:49,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:05:51,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [578557151] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:05:51,924 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:05:51,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 21 [2021-12-06 18:05:51,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923901743] [2021-12-06 18:05:51,924 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:05:51,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 18:05:51,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:05:51,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 18:05:51,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=626, Unknown=7, NotChecked=0, Total=702 [2021-12-06 18:05:51,925 INFO L87 Difference]: Start difference. First operand 169 states and 182 transitions. Second operand has 22 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 18:06:03,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:06:03,537 INFO L93 Difference]: Finished difference Result 205 states and 229 transitions. [2021-12-06 18:06:03,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 18:06:03,537 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 45 [2021-12-06 18:06:03,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:06:03,539 INFO L225 Difference]: With dead ends: 205 [2021-12-06 18:06:03,539 INFO L226 Difference]: Without dead ends: 205 [2021-12-06 18:06:03,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=109, Invalid=871, Unknown=12, NotChecked=0, Total=992 [2021-12-06 18:06:03,540 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 111 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 349 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:06:03,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 481 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 546 Invalid, 0 Unknown, 349 Unchecked, 1.2s Time] [2021-12-06 18:06:03,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-12-06 18:06:03,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 176. [2021-12-06 18:06:03,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 129 states have (on average 1.2635658914728682) internal successors, (163), 152 states have internal predecessors, (163), 13 states have call successors, (13), 12 states have call predecessors, (13), 11 states have return successors, (15), 11 states have call predecessors, (15), 13 states have call successors, (15) [2021-12-06 18:06:03,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 191 transitions. [2021-12-06 18:06:03,545 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 191 transitions. Word has length 45 [2021-12-06 18:06:03,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:06:03,545 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 191 transitions. [2021-12-06 18:06:03,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 18:06:03,546 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 191 transitions. [2021-12-06 18:06:03,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 18:06:03,546 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:06:03,546 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:06:03,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-12-06 18:06:03,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-12-06 18:06:03,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 18:06:03,948 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting list_add_tailErr1REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-06 18:06:03,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:06:03,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1563009013, now seen corresponding path program 1 times [2021-12-06 18:06:03,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:06:03,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099501131] [2021-12-06 18:06:03,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:06:03,951 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:06:03,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:06:03,953 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:06:03,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-06 18:06:04,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:06:04,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-06 18:06:04,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:06:04,344 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 [2021-12-06 18:06:04,352 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 [2021-12-06 18:06:04,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:06:04,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 18:06:04,404 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:06:04,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-06 18:06:04,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:06:04,599 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 [2021-12-06 18:06:04,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:06:04,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 18:06:04,976 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 [2021-12-06 18:06:05,144 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:06:05,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-06 18:06:05,451 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:06:05,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:06:06,071 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:06:06,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099501131] [2021-12-06 18:06:06,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099501131] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:06:06,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1316962836] [2021-12-06 18:06:06,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:06:06,072 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 18:06:06,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 18:06:06,073 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 18:06:06,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-12-06 18:06:07,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:06:07,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 18:06:07,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:06:07,414 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 [2021-12-06 18:06:07,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:06:07,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 18:06:07,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:06:07,795 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 [2021-12-06 18:06:07,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:06:07,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 18:06:08,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:06:08,122 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 [2021-12-06 18:06:08,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:06:08,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 18:06:08,506 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 18:06:08,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:06:08,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1316962836] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:06:08,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:06:08,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 18 [2021-12-06 18:06:08,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239949908] [2021-12-06 18:06:08,800 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:06:08,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 18:06:08,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:06:08,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 18:06:08,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-12-06 18:06:08,801 INFO L87 Difference]: Start difference. First operand 176 states and 191 transitions. Second operand has 19 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 6 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 18:06:09,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:06:09,656 INFO L93 Difference]: Finished difference Result 246 states and 271 transitions. [2021-12-06 18:06:09,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 18:06:09,657 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 6 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 51 [2021-12-06 18:06:09,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:06:09,659 INFO L225 Difference]: With dead ends: 246 [2021-12-06 18:06:09,659 INFO L226 Difference]: Without dead ends: 246 [2021-12-06 18:06:09,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 82 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-12-06 18:06:09,660 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 46 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 347 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:06:09,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 514 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 153 Invalid, 0 Unknown, 347 Unchecked, 0.4s Time] [2021-12-06 18:06:09,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-12-06 18:06:09,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 240. [2021-12-06 18:06:09,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 181 states have (on average 1.2375690607734806) internal successors, (224), 206 states have internal predecessors, (224), 18 states have call successors, (18), 17 states have call predecessors, (18), 18 states have return successors, (26), 16 states have call predecessors, (26), 18 states have call successors, (26) [2021-12-06 18:06:09,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 268 transitions. [2021-12-06 18:06:09,670 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 268 transitions. Word has length 51 [2021-12-06 18:06:09,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:06:09,670 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 268 transitions. [2021-12-06 18:06:09,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 6 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 18:06:09,670 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 268 transitions. [2021-12-06 18:06:09,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 18:06:09,671 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:06:09,671 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:06:09,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2021-12-06 18:06:09,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-12-06 18:06:10,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:06:10,073 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting list_add_tailErr0REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-06 18:06:10,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:06:10,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1563009014, now seen corresponding path program 1 times [2021-12-06 18:06:10,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:06:10,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1283185428] [2021-12-06 18:06:10,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:06:10,076 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:06:10,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:06:10,077 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:06:10,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-06 18:06:10,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:06:10,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 18:06:10,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:06:10,477 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 [2021-12-06 18:06:10,528 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 18:06:10,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-12-06 18:06:10,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 18:06:10,695 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 [2021-12-06 18:06:10,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:06:10,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 18:06:11,056 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 [2021-12-06 18:06:11,233 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-06 18:06:11,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2021-12-06 18:06:11,483 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:06:11,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:06:11,850 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:06:11,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1283185428] [2021-12-06 18:06:11,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1283185428] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:06:11,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1916833616] [2021-12-06 18:06:11,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:06:11,851 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 18:06:11,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 18:06:11,852 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 18:06:11,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-12-06 18:06:12,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:06:12,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 18:06:12,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:06:13,059 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-06 18:06:13,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 19 [2021-12-06 18:06:13,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:06:13,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:06:13,175 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-06 18:06:13,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 37 [2021-12-06 18:06:13,325 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 18:06:13,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 18:06:13,493 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 [2021-12-06 18:06:13,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:06:13,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:06:13,677 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-06 18:06:13,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 47 [2021-12-06 18:06:13,886 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 18:06:13,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-12-06 18:06:14,045 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 [2021-12-06 18:06:14,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:06:14,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:06:14,236 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-06 18:06:14,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 48 [2021-12-06 18:06:15,171 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-06 18:06:15,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:06:15,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1916833616] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:06:15,326 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:06:15,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-12-06 18:06:15,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125751464] [2021-12-06 18:06:15,327 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:06:15,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 18:06:15,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:06:15,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 18:06:15,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-12-06 18:06:15,328 INFO L87 Difference]: Start difference. First operand 240 states and 268 transitions. Second operand has 20 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 6 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 18:06:15,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:06:15,863 INFO L93 Difference]: Finished difference Result 257 states and 284 transitions. [2021-12-06 18:06:15,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 18:06:15,863 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 6 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 51 [2021-12-06 18:06:15,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:06:15,865 INFO L225 Difference]: With dead ends: 257 [2021-12-06 18:06:15,866 INFO L226 Difference]: Without dead ends: 257 [2021-12-06 18:06:15,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 83 SyntacticMatches, 10 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-12-06 18:06:15,867 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 40 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:06:15,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 514 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 138 Invalid, 0 Unknown, 174 Unchecked, 0.3s Time] [2021-12-06 18:06:15,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-12-06 18:06:15,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 240. [2021-12-06 18:06:15,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 181 states have (on average 1.2320441988950277) internal successors, (223), 206 states have internal predecessors, (223), 18 states have call successors, (18), 17 states have call predecessors, (18), 18 states have return successors, (26), 16 states have call predecessors, (26), 18 states have call successors, (26) [2021-12-06 18:06:15,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 267 transitions. [2021-12-06 18:06:15,874 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 267 transitions. Word has length 51 [2021-12-06 18:06:15,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:06:15,874 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 267 transitions. [2021-12-06 18:06:15,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 6 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 18:06:15,874 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 267 transitions. [2021-12-06 18:06:15,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 18:06:15,875 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:06:15,875 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:06:15,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-12-06 18:06:16,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2021-12-06 18:06:16,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 18:06:16,277 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting list_add_tailErr8REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-06 18:06:16,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:06:16,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1771803766, now seen corresponding path program 2 times [2021-12-06 18:06:16,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:06:16,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1311219493] [2021-12-06 18:06:16,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:06:16,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:06:16,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:06:16,282 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:06:16,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-12-06 18:06:16,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:06:16,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:06:16,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 98 conjunts are in the unsatisfiable core [2021-12-06 18:06:16,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:06:16,929 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 [2021-12-06 18:06:17,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:06:17,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:06:17,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:06:17,074 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:06:17,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-12-06 18:06:17,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:06:17,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:06:17,580 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:06:17,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-06 18:06:17,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:06:17,745 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:06:17,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2021-12-06 18:06:18,715 INFO L354 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2021-12-06 18:06:18,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 46 [2021-12-06 18:06:18,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-06 18:06:19,049 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 18:06:19,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-12-06 18:06:19,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 18:06:19,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-12-06 18:06:20,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-12-06 18:06:20,737 INFO L354 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2021-12-06 18:06:20,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 47 [2021-12-06 18:06:20,996 INFO L354 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2021-12-06 18:06:20,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 61 [2021-12-06 18:06:21,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2021-12-06 18:06:21,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2021-12-06 18:06:21,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2021-12-06 18:06:21,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 18:06:22,418 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:06:22,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:06:23,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-12-06 18:06:23,706 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2295 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2294 (_ BitVec 1)) (|v_create_sub_list_insert_sub_~sub~0#1.base_65| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_65|))))) (and (= |v_create_sub_list_insert_sub_~sub~0#1.base_65| |c_create_sub_list_~sub#1.base|) (not (bvule (bvadd (_ bv8 32) |c_create_sub_list_~sub#1.offset|) (_ bv12 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_65| v_ArrVal_2294) (select (select (store |c_#memory_$Pointer$.base| |v_create_sub_list_insert_sub_~sub~0#1.base_65| v_ArrVal_2295) |c_create_sub_list_~sub#1.base|) (bvadd (_ bv4 32) |c_create_sub_list_~sub#1.offset|))))))))))))))))) is different from false [2021-12-06 18:06:24,305 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2295 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2294 (_ BitVec 1)) (v_ArrVal_2303 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2304 (Array (_ BitVec 32) (_ BitVec 32))) (|v_create_sub_list_insert_sub_~sub~0#1.base_65| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_65|))))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_65| v_ArrVal_2294) (select (select (store (let ((.cse0 (select |c_#memory_$Pointer$.base| |c_create_sub_list_insert_sub_~head#1.base|)) (.cse1 (bvadd |c_create_sub_list_insert_sub_~head#1.offset| (_ bv4 32)))) (store (store (store |c_#memory_$Pointer$.base| |c_create_sub_list_insert_sub_~head#1.base| (store .cse0 .cse1 |c_create_sub_list_insert_sub_~sub~0#1.base|)) |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_2304) (select .cse0 .cse1) v_ArrVal_2303)) |v_create_sub_list_insert_sub_~sub~0#1.base_65| v_ArrVal_2295) |c_create_sub_list_~sub#1.base|) (bvadd (_ bv4 32) |c_create_sub_list_~sub#1.offset|))))))))))))))) (_ bv1 1))) (and (= |v_create_sub_list_insert_sub_~sub~0#1.base_65| |c_create_sub_list_~sub#1.base|) (not (bvule (bvadd (_ bv8 32) |c_create_sub_list_~sub#1.offset|) (_ bv12 32)))))) is different from false [2021-12-06 18:06:24,310 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:06:24,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1311219493] [2021-12-06 18:06:24,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1311219493] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:06:24,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1803926103] [2021-12-06 18:06:24,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:06:24,311 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 18:06:24,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 18:06:24,311 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 18:06:24,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-12-06 18:06:24,817 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 18:06:24,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322713381] [2021-12-06 18:06:24,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:06:24,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:06:24,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:06:24,818 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:06:24,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-06 18:06:24,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 1 [2021-12-06 18:06:25,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:06:25,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:06:25,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 114 conjunts are in the unsatisfiable core [2021-12-06 18:06:25,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:06:25,975 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 [2021-12-06 18:06:25,984 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 [2021-12-06 18:06:26,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:06:26,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:06:26,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:06:26,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:06:26,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:06:26,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:06:26,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:06:26,909 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:06:26,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-12-06 18:06:27,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:06:27,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:06:29,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 36 [2021-12-06 18:06:29,325 INFO L354 Elim1Store]: treesize reduction 46, result has 19.3 percent of original size [2021-12-06 18:06:29,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 78 [2021-12-06 18:06:29,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:06:29,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2021-12-06 18:06:29,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 24 [2021-12-06 18:06:29,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2021-12-06 18:06:29,446 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 18:06:29,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 27 [2021-12-06 18:06:29,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 18:06:29,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-12-06 18:06:32,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-12-06 18:06:32,067 INFO L354 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2021-12-06 18:06:32,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 47 [2021-12-06 18:06:32,213 INFO L354 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2021-12-06 18:06:32,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 63 [2021-12-06 18:06:32,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2021-12-06 18:06:33,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2021-12-06 18:06:34,280 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:06:34,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:06:34,964 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2597 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_2597) |c_create_sub_list_insert_sub_~head#1.base|) (bvadd |c_create_sub_list_insert_sub_~head#1.offset| (_ bv4 32)))))))))))) is different from false [2021-12-06 18:06:35,028 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_create_sub_list_insert_sub_~sub~0#1.base_67| (_ BitVec 32)) (v_ArrVal_2597 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2596 (_ BitVec 1))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_67|)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_67| v_ArrVal_2596) (select (select (store |c_#memory_$Pointer$.base| |v_create_sub_list_insert_sub_~sub~0#1.base_67| v_ArrVal_2597) |c_create_sub_list_~sub#1.base|) (bvadd (_ bv4 32) |c_create_sub_list_~sub#1.offset|))))))))) (_ bv1 1))) (not (= (_ bv0 1) (bvadd (bvneg v_ArrVal_2596) (_ bv1 1)))))) is different from false [2021-12-06 18:06:35,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322713381] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:06:35,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:06:35,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32] total 57 [2021-12-06 18:06:35,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739731463] [2021-12-06 18:06:35,914 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:06:35,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-06 18:06:35,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:06:35,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-06 18:06:35,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=4225, Unknown=117, NotChecked=540, Total=5112 [2021-12-06 18:06:35,917 INFO L87 Difference]: Start difference. First operand 240 states and 267 transitions. Second operand has 58 states, 55 states have (on average 1.4545454545454546) internal successors, (80), 51 states have internal predecessors, (80), 7 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-06 18:06:47,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:06:47,959 INFO L93 Difference]: Finished difference Result 240 states and 266 transitions. [2021-12-06 18:06:47,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-06 18:06:47,960 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 55 states have (on average 1.4545454545454546) internal successors, (80), 51 states have internal predecessors, (80), 7 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 51 [2021-12-06 18:06:47,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:06:47,962 INFO L225 Difference]: With dead ends: 240 [2021-12-06 18:06:47,962 INFO L226 Difference]: Without dead ends: 240 [2021-12-06 18:06:47,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 95 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 2397 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=555, Invalid=7817, Unknown=200, NotChecked=740, Total=9312 [2021-12-06 18:06:47,965 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 76 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 1196 SdHoareTripleChecker+Invalid, 1930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1124 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:06:47,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 1196 Invalid, 1930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 767 Invalid, 0 Unknown, 1124 Unchecked, 2.2s Time] [2021-12-06 18:06:47,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-12-06 18:06:47,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2021-12-06 18:06:47,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 181 states have (on average 1.2265193370165746) internal successors, (222), 206 states have internal predecessors, (222), 18 states have call successors, (18), 17 states have call predecessors, (18), 18 states have return successors, (26), 16 states have call predecessors, (26), 18 states have call successors, (26) [2021-12-06 18:06:47,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 266 transitions. [2021-12-06 18:06:47,974 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 266 transitions. Word has length 51 [2021-12-06 18:06:47,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:06:47,975 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 266 transitions. [2021-12-06 18:06:47,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 55 states have (on average 1.4545454545454546) internal successors, (80), 51 states have internal predecessors, (80), 7 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-06 18:06:47,975 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 266 transitions. [2021-12-06 18:06:47,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 18:06:47,976 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:06:47,976 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:06:47,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-12-06 18:06:48,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-12-06 18:06:48,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:06:48,380 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting list_add_tailErr9REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-06 18:06:48,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:06:48,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1771803765, now seen corresponding path program 2 times [2021-12-06 18:06:48,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:06:48,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [76353845] [2021-12-06 18:06:48,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:06:48,382 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:06:48,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:06:48,383 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:06:48,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-12-06 18:06:49,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:06:49,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:06:49,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 133 conjunts are in the unsatisfiable core [2021-12-06 18:06:49,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:06:49,045 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 [2021-12-06 18:06:49,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:06:49,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:06:49,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:06:49,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:06:49,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:06:49,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:06:49,234 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:06:49,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-06 18:06:49,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:06:49,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:06:50,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 36 [2021-12-06 18:06:50,330 INFO L354 Elim1Store]: treesize reduction 46, result has 19.3 percent of original size [2021-12-06 18:06:50,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 78 [2021-12-06 18:06:50,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:06:50,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2021-12-06 18:06:50,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 24 [2021-12-06 18:06:50,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 22 [2021-12-06 18:06:50,492 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 [2021-12-06 18:06:50,541 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 18:06:50,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2021-12-06 18:06:50,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 18:06:50,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-12-06 18:06:51,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:06:51,911 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:06:51,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-06 18:06:51,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:06:52,229 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:06:52,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2021-12-06 18:06:52,519 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-12-06 18:06:52,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 38 [2021-12-06 18:06:52,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:06:52,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-12-06 18:06:53,039 INFO L354 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2021-12-06 18:06:53,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 57 [2021-12-06 18:06:53,382 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-06 18:06:53,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2021-12-06 18:06:53,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:06:53,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2021-12-06 18:06:53,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 18:06:54,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-12-06 18:06:54,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:06:54,772 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:06:54,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:06:58,778 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:06:58,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 123 [2021-12-06 18:06:58,846 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:06:58,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2634 treesize of output 2535 [2021-12-06 18:06:58,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2535 treesize of output 2391 [2021-12-06 18:06:58,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2391 treesize of output 2319 [2021-12-06 18:06:58,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2297 treesize of output 2265 [2021-12-06 18:06:58,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2265 treesize of output 2009 [2021-12-06 18:06:58,967 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:06:58,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [76353845] [2021-12-06 18:06:58,967 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-06 18:06:58,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1750253454] [2021-12-06 18:06:58,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:06:58,968 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 18:06:58,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 18:06:58,968 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 18:06:58,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-12-06 18:07:00,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:07:00,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:07:00,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 137 conjunts are in the unsatisfiable core [2021-12-06 18:07:00,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:07:00,900 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 [2021-12-06 18:07:00,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:07:00,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:07:00,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:07:00,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:07:00,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:07:00,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:07:01,011 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:07:01,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-06 18:07:01,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:07:01,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:07:01,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 47 [2021-12-06 18:07:01,814 INFO L354 Elim1Store]: treesize reduction 46, result has 19.3 percent of original size [2021-12-06 18:07:01,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 78 [2021-12-06 18:07:01,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:07:01,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2021-12-06 18:07:01,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 24 [2021-12-06 18:07:01,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 22 [2021-12-06 18:07:01,909 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 [2021-12-06 18:07:01,957 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 18:07:01,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 35 [2021-12-06 18:07:02,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 18:07:02,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-12-06 18:07:02,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:07:02,604 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:07:02,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-06 18:07:02,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:07:02,895 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:07:02,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2021-12-06 18:07:03,129 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-12-06 18:07:03,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 38 [2021-12-06 18:07:03,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:07:03,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-12-06 18:07:03,561 INFO L354 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2021-12-06 18:07:03,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 57 [2021-12-06 18:07:03,683 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 18:07:03,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:07:03,721 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-06 18:07:03,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 39 [2021-12-06 18:07:03,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 18:07:03,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2021-12-06 18:07:04,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:07:04,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-06 18:07:04,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:07:04,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 17 [2021-12-06 18:07:05,223 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:07:05,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:07:08,836 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:07:08,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 123 [2021-12-06 18:07:08,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:07:08,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1446 treesize of output 1419 [2021-12-06 18:07:08,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1419 treesize of output 1395 [2021-12-06 18:07:08,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1395 treesize of output 1347 [2021-12-06 18:07:08,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1325 treesize of output 1293 [2021-12-06 18:07:08,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1293 treesize of output 1229 [2021-12-06 18:07:23,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 18:07:24,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 18:07:26,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-12-06 18:07:29,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 18:07:31,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 18:07:39,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1750253454] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:07:39,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79722515] [2021-12-06 18:07:39,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:07:39,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:07:39,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:07:39,107 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:07:39,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-06 18:07:39,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:07:39,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:07:39,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 131 conjunts are in the unsatisfiable core [2021-12-06 18:07:39,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:07:39,699 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 [2021-12-06 18:07:39,705 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 [2021-12-06 18:07:40,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:07:40,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:07:40,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:07:40,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:07:40,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:07:40,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:07:40,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:07:40,660 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:07:40,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-06 18:07:40,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:07:40,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:07:41,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 36 [2021-12-06 18:07:41,317 INFO L354 Elim1Store]: treesize reduction 46, result has 19.3 percent of original size [2021-12-06 18:07:41,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 78 [2021-12-06 18:07:41,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:07:41,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2021-12-06 18:07:41,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 24 [2021-12-06 18:07:41,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2021-12-06 18:07:41,389 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 [2021-12-06 18:07:41,435 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 18:07:41,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 34 [2021-12-06 18:07:41,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 18:07:41,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-12-06 18:07:41,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:07:42,105 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:07:42,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-06 18:07:42,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:07:42,374 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:07:42,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2021-12-06 18:07:42,598 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-12-06 18:07:42,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 38 [2021-12-06 18:07:42,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:07:42,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-12-06 18:07:43,044 INFO L354 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2021-12-06 18:07:43,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 57 [2021-12-06 18:07:43,175 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-06 18:07:43,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 38 [2021-12-06 18:07:43,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:07:43,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 18:07:43,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2021-12-06 18:07:44,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-06 18:07:44,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:07:44,793 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:07:44,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:07:46,091 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_3144 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_3144) |c_create_sub_list_insert_sub_~head#1.base|) (bvadd |c_create_sub_list_insert_sub_~head#1.offset| (_ bv4 32))))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((v_ArrVal_3144 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3143 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (bvadd |c_create_sub_list_insert_sub_~head#1.offset| (_ bv4 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_3144) |c_create_sub_list_insert_sub_~head#1.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_3143) |c_create_sub_list_insert_sub_~head#1.base|) .cse1)))))) is different from false [2021-12-06 18:07:50,680 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:07:50,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 123 [2021-12-06 18:07:50,744 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:07:50,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 932 treesize of output 911 [2021-12-06 18:07:50,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 911 treesize of output 891 [2021-12-06 18:07:50,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 891 treesize of output 851 [2021-12-06 18:07:50,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 829 treesize of output 813 [2021-12-06 18:07:50,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 813 treesize of output 749 [2021-12-06 18:07:59,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79722515] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:07:59,753 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:07:59,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32] total 42 [2021-12-06 18:07:59,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644222669] [2021-12-06 18:07:59,753 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:07:59,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-06 18:07:59,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:07:59,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-06 18:07:59,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=3893, Unknown=45, NotChecked=126, Total=4290 [2021-12-06 18:07:59,755 INFO L87 Difference]: Start difference. First operand 240 states and 266 transitions. Second operand has 43 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 37 states have internal predecessors, (63), 6 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 18:08:13,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:08:13,995 INFO L93 Difference]: Finished difference Result 240 states and 265 transitions. [2021-12-06 18:08:13,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 18:08:13,996 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 37 states have internal predecessors, (63), 6 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2021-12-06 18:08:13,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:08:13,997 INFO L225 Difference]: With dead ends: 240 [2021-12-06 18:08:13,997 INFO L226 Difference]: Without dead ends: 240 [2021-12-06 18:08:14,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 111 SyntacticMatches, 16 SemanticMatches, 86 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1996 ImplicationChecksByTransitivity, 38.0s TimeCoverageRelationStatistics Valid=464, Invalid=6939, Unknown=83, NotChecked=170, Total=7656 [2021-12-06 18:08:14,000 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 58 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 1123 SdHoareTripleChecker+Invalid, 1893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 727 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:08:14,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 1123 Invalid, 1893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1134 Invalid, 0 Unknown, 727 Unchecked, 3.3s Time] [2021-12-06 18:08:14,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-12-06 18:08:14,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2021-12-06 18:08:14,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 181 states have (on average 1.2209944751381216) internal successors, (221), 206 states have internal predecessors, (221), 18 states have call successors, (18), 17 states have call predecessors, (18), 18 states have return successors, (26), 16 states have call predecessors, (26), 18 states have call successors, (26) [2021-12-06 18:08:14,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 265 transitions. [2021-12-06 18:08:14,006 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 265 transitions. Word has length 51 [2021-12-06 18:08:14,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:08:14,006 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 265 transitions. [2021-12-06 18:08:14,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 37 states have internal predecessors, (63), 6 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 18:08:14,007 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 265 transitions. [2021-12-06 18:08:14,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-06 18:08:14,007 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:08:14,007 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:08:14,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2021-12-06 18:08:14,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-12-06 18:08:14,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-12-06 18:08:14,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:08:14,610 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting list_add_tailErr4REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-06 18:08:14,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:08:14,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1861045348, now seen corresponding path program 1 times [2021-12-06 18:08:14,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:08:14,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1435617899] [2021-12-06 18:08:14,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:08:14,613 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:08:14,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:08:14,614 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:08:14,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-12-06 18:08:14,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:08:14,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 18:08:14,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:08:15,200 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:08:15,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:08:15,520 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 18:08:15,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2021-12-06 18:08:15,579 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 18:08:15,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2021-12-06 18:08:15,624 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:08:15,624 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:08:15,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1435617899] [2021-12-06 18:08:15,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1435617899] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:08:15,624 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:08:15,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-12-06 18:08:15,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717405100] [2021-12-06 18:08:15,624 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:08:15,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 18:08:15,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:08:15,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 18:08:15,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:08:15,625 INFO L87 Difference]: Start difference. First operand 240 states and 265 transitions. Second operand has 11 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 18:08:16,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:08:16,729 INFO L93 Difference]: Finished difference Result 248 states and 272 transitions. [2021-12-06 18:08:16,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 18:08:16,729 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2021-12-06 18:08:16,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:08:16,731 INFO L225 Difference]: With dead ends: 248 [2021-12-06 18:08:16,731 INFO L226 Difference]: Without dead ends: 248 [2021-12-06 18:08:16,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 96 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-12-06 18:08:16,732 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 95 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:08:16,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 421 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 18:08:16,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-12-06 18:08:16,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 239. [2021-12-06 18:08:16,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 181 states have (on average 1.2099447513812154) internal successors, (219), 205 states have internal predecessors, (219), 18 states have call successors, (18), 17 states have call predecessors, (18), 18 states have return successors, (26), 16 states have call predecessors, (26), 18 states have call successors, (26) [2021-12-06 18:08:16,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 263 transitions. [2021-12-06 18:08:16,742 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 263 transitions. Word has length 54 [2021-12-06 18:08:16,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:08:16,742 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 263 transitions. [2021-12-06 18:08:16,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 18:08:16,742 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 263 transitions. [2021-12-06 18:08:16,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-06 18:08:16,743 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:08:16,743 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:08:16,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2021-12-06 18:08:16,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:08:16,944 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting list_add_tailErr5REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-06 18:08:16,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:08:16,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1861045347, now seen corresponding path program 1 times [2021-12-06 18:08:16,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:08:16,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2028739648] [2021-12-06 18:08:16,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:08:16,948 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:08:16,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:08:16,951 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:08:16,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-12-06 18:08:17,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:08:17,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 18:08:17,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:08:17,724 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:08:17,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:08:18,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-12-06 18:08:19,034 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:08:19,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2021-12-06 18:08:19,867 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:08:19,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2021-12-06 18:08:20,591 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:08:20,591 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:08:20,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2028739648] [2021-12-06 18:08:20,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2028739648] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:08:20,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:08:20,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-12-06 18:08:20,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756372266] [2021-12-06 18:08:20,593 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:08:20,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 18:08:20,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:08:20,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 18:08:20,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-12-06 18:08:20,595 INFO L87 Difference]: Start difference. First operand 239 states and 263 transitions. Second operand has 22 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 states have internal predecessors, (70), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-06 18:08:24,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:08:24,182 INFO L93 Difference]: Finished difference Result 239 states and 259 transitions. [2021-12-06 18:08:24,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 18:08:24,184 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 states have internal predecessors, (70), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) Word has length 54 [2021-12-06 18:08:24,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:08:24,185 INFO L225 Difference]: With dead ends: 239 [2021-12-06 18:08:24,185 INFO L226 Difference]: Without dead ends: 239 [2021-12-06 18:08:24,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=156, Invalid=966, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 18:08:24,186 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 170 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:08:24,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 736 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 513 Invalid, 0 Unknown, 60 Unchecked, 2.2s Time] [2021-12-06 18:08:24,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-12-06 18:08:24,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 237. [2021-12-06 18:08:24,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 181 states have (on average 1.1878453038674033) internal successors, (215), 203 states have internal predecessors, (215), 18 states have call successors, (18), 17 states have call predecessors, (18), 18 states have return successors, (26), 16 states have call predecessors, (26), 18 states have call successors, (26) [2021-12-06 18:08:24,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 259 transitions. [2021-12-06 18:08:24,191 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 259 transitions. Word has length 54 [2021-12-06 18:08:24,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:08:24,191 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 259 transitions. [2021-12-06 18:08:24,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 states have internal predecessors, (70), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-06 18:08:24,192 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 259 transitions. [2021-12-06 18:08:24,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-06 18:08:24,192 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:08:24,192 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:08:24,201 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-12-06 18:08:24,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:08:24,393 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting list_add_tailErr8REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-06 18:08:24,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:08:24,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1758182945, now seen corresponding path program 1 times [2021-12-06 18:08:24,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:08:24,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [543196343] [2021-12-06 18:08:24,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:08:24,396 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:08:24,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:08:24,399 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:08:24,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-12-06 18:08:24,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:08:24,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 103 conjunts are in the unsatisfiable core [2021-12-06 18:08:24,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:08:24,944 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 [2021-12-06 18:08:25,019 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 18:08:25,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2021-12-06 18:08:25,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-06 18:08:25,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-06 18:08:35,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 18:08:37,180 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-06 18:08:37,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 53 [2021-12-06 18:08:37,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:08:37,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:08:37,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:08:37,250 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-12-06 18:08:37,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 37 [2021-12-06 18:08:37,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:08:37,292 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:08:37,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 30 [2021-12-06 18:08:37,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:08:37,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-06 18:08:37,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-06 18:08:50,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-06 18:08:52,134 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-06 18:08:52,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 53 [2021-12-06 18:08:52,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:08:52,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:08:52,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:08:52,205 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-12-06 18:08:52,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 37 [2021-12-06 18:08:52,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-12-06 18:08:52,253 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:08:52,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-12-06 18:08:52,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 18:08:53,213 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 18:08:53,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:08:53,522 INFO L354 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2021-12-06 18:08:53,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 18:08:55,162 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:08:55,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [543196343] [2021-12-06 18:08:55,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [543196343] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:08:55,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [714593184] [2021-12-06 18:08:55,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:08:55,163 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 18:08:55,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 18:08:55,164 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 18:08:55,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-12-06 18:08:56,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:08:56,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 116 conjunts are in the unsatisfiable core [2021-12-06 18:08:56,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:08:56,937 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-06 18:08:56,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 19 [2021-12-06 18:08:57,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:08:57,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:08:57,215 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-06 18:08:57,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 37 [2021-12-06 18:08:57,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:08:57,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:08:57,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:08:57,587 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 18:08:57,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 31 [2021-12-06 18:09:19,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2021-12-06 18:09:20,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:09:20,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:09:20,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 53 [2021-12-06 18:09:20,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:09:20,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:09:20,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:09:20,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:09:20,699 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-12-06 18:09:20,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 35 [2021-12-06 18:09:20,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:09:20,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:09:20,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:09:20,803 INFO L354 Elim1Store]: treesize reduction 46, result has 27.0 percent of original size [2021-12-06 18:09:20,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 52 treesize of output 64 [2021-12-06 18:09:20,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:09:21,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:09:21,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:09:21,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:09:21,343 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 18:09:21,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 34 [2021-12-06 18:09:50,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 11 [2021-12-06 18:09:55,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:09:55,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 47 [2021-12-06 18:09:55,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:09:55,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:09:55,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:09:55,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:09:55,936 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-12-06 18:09:55,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 31 [2021-12-06 18:09:55,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:09:55,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:09:55,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:09:56,075 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-12-06 18:09:56,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 73 [2021-12-06 18:09:56,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:09:58,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:10:01,130 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:01,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:10:03,042 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3747 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3746 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3748 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3745 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3749 (_ BitVec 32)) (|v_create_sub_list_insert_sub_~sub~0#1.base_99| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_99|))))))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_99| (_ bv1 1)) (select (select (let ((.cse1 (bvadd |c_ULTIMATE.start_insert_top_~top~0#1.offset| (_ bv20 32)))) (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_insert_top_~top~0#1.base| (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_insert_top_~top~0#1.base|) .cse1 |c_ULTIMATE.start_insert_top_~top~0#1.base|) (bvadd (_ bv16 32) |c_ULTIMATE.start_insert_top_~top~0#1.offset|) v_ArrVal_3749)) |v_create_sub_list_insert_sub_~sub~0#1.base_99| v_ArrVal_3746))) (store (store (store .cse0 |c_ULTIMATE.start_insert_top_~top~0#1.base| v_ArrVal_3745) |v_create_sub_list_insert_sub_~sub~0#1.base_99| v_ArrVal_3748) (select (select .cse0 |c_ULTIMATE.start_insert_top_~top~0#1.base|) .cse1) v_ArrVal_3747))) |c_ULTIMATE.start_insert_top_~head#1.base|) (bvadd |c_ULTIMATE.start_insert_top_~head#1.offset| (_ bv4 32))))))))) (_ bv1 1))) (not (bvult |v_create_sub_list_insert_sub_~sub~0#1.base_99| |c_#StackHeapBarrier|)))) is different from false [2021-12-06 18:10:03,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [714593184] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:10:03,048 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:10:03,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 39] total 65 [2021-12-06 18:10:03,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241204082] [2021-12-06 18:10:03,049 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:10:03,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-06 18:10:03,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:10:03,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-06 18:10:03,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=5114, Unknown=175, NotChecked=146, Total=5700 [2021-12-06 18:10:03,051 INFO L87 Difference]: Start difference. First operand 237 states and 259 transitions. Second operand has 66 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 55 states have internal predecessors, (82), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-06 18:10:07,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:10:07,242 INFO L93 Difference]: Finished difference Result 239 states and 260 transitions. [2021-12-06 18:10:07,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-06 18:10:07,243 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 55 states have internal predecessors, (82), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 56 [2021-12-06 18:10:07,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:10:07,244 INFO L225 Difference]: With dead ends: 239 [2021-12-06 18:10:07,244 INFO L226 Difference]: Without dead ends: 239 [2021-12-06 18:10:07,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 82 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1927 ImplicationChecksByTransitivity, 89.9s TimeCoverageRelationStatistics Valid=315, Invalid=6268, Unknown=227, NotChecked=162, Total=6972 [2021-12-06 18:10:07,246 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 4 mSDsluCounter, 1122 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1197 SdHoareTripleChecker+Invalid, 1255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1046 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:10:07,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 1197 Invalid, 1255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 209 Invalid, 0 Unknown, 1046 Unchecked, 0.6s Time] [2021-12-06 18:10:07,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-12-06 18:10:07,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 237. [2021-12-06 18:10:07,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 181 states have (on average 1.1823204419889504) internal successors, (214), 203 states have internal predecessors, (214), 18 states have call successors, (18), 17 states have call predecessors, (18), 18 states have return successors, (26), 16 states have call predecessors, (26), 18 states have call successors, (26) [2021-12-06 18:10:07,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 258 transitions. [2021-12-06 18:10:07,251 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 258 transitions. Word has length 56 [2021-12-06 18:10:07,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:10:07,252 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 258 transitions. [2021-12-06 18:10:07,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 55 states have internal predecessors, (82), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-06 18:10:07,252 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 258 transitions. [2021-12-06 18:10:07,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-06 18:10:07,252 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:10:07,252 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:07,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2021-12-06 18:10:07,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2021-12-06 18:10:07,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 18:10:07,654 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting list_add_tailErr9REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-06 18:10:07,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:07,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1758182944, now seen corresponding path program 1 times [2021-12-06 18:10:07,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:10:07,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [49526470] [2021-12-06 18:10:07,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:07,657 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:10:07,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:10:07,659 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:10:07,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-12-06 18:10:08,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:08,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 138 conjunts are in the unsatisfiable core [2021-12-06 18:10:08,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:10:08,363 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 [2021-12-06 18:10:08,374 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 [2021-12-06 18:10:08,468 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 18:10:08,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-12-06 18:10:08,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 18:10:08,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-12-06 18:10:08,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:10:08,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:10:08,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:10:15,423 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 [2021-12-06 18:10:15,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-06 18:10:17,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:10:17,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:10:17,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:10:17,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:10:17,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 43 [2021-12-06 18:10:17,532 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-06 18:10:17,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 51 [2021-12-06 18:10:17,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:10:17,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:10:17,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:10:17,612 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-12-06 18:10:17,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 35 [2021-12-06 18:10:17,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:10:17,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 18:10:17,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:10:17,673 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:10:17,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 32 [2021-12-06 18:10:17,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:10:17,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-06 18:10:17,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:10:17,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:10:17,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:10:24,982 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 [2021-12-06 18:10:24,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-06 18:10:27,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:10:27,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:10:27,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:10:27,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:10:27,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 43 [2021-12-06 18:10:27,420 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-06 18:10:27,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 51 [2021-12-06 18:10:27,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:10:27,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:10:27,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:10:27,508 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-12-06 18:10:27,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 35 [2021-12-06 18:10:27,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:10:27,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 18:10:27,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-12-06 18:10:27,574 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:10:27,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-06 18:10:28,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:10:28,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:10:28,770 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 18:10:28,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:10:32,438 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:10:32,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [49526470] [2021-12-06 18:10:32,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [49526470] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:10:32,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [29146926] [2021-12-06 18:10:32,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:32,438 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 18:10:32,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 18:10:32,439 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 18:10:32,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-12-06 18:10:34,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 150 conjunts are in the unsatisfiable core [2021-12-06 18:10:34,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:10:34,770 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 [2021-12-06 18:10:35,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:10:35,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 18:10:35,196 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 [2021-12-06 18:10:35,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:10:35,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:10:35,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:10:35,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-06 18:10:48,728 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 [2021-12-06 18:10:48,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-06 18:10:51,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:10:51,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:10:51,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:10:51,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:10:51,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:10:51,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 45 [2021-12-06 18:10:51,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:10:51,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:10:51,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 53 [2021-12-06 18:10:51,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:10:51,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:10:51,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:10:51,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:10:51,578 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-12-06 18:10:51,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 35 [2021-12-06 18:10:51,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:10:51,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 18:10:51,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:10:51,666 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:10:51,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-06 18:10:52,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:10:52,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:10:52,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:10:52,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-06 18:11:09,222 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 [2021-12-06 18:11:09,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-06 18:11:14,239 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((|v_create_sub_list_insert_sub_~sub~0#1.base_105| (_ BitVec 32)) (|v_ULTIMATE.start_insert_top_~top~0#1.base_BEFORE_CALL_42| (_ BitVec 32))) (and (not (= |v_create_sub_list_insert_sub_~sub~0#1.base_105| |v_ULTIMATE.start_insert_top_~top~0#1.base_BEFORE_CALL_42|)) (bvult |v_ULTIMATE.start_insert_top_~top~0#1.base_BEFORE_CALL_42| |c_#StackHeapBarrier|) (bvult |v_create_sub_list_insert_sub_~sub~0#1.base_105| |c_#StackHeapBarrier|))) (exists ((v_ArrVal_4135 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_4137 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_4132 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store (store (store |c_old(#memory_$Pointer$.offset)| |c_list_add_tail_#in~head#1.base| v_ArrVal_4132) |c_list_add_tail_#in~new#1.base| v_ArrVal_4135) (select (select |c_old(#memory_$Pointer$.base)| |c_list_add_tail_#in~head#1.base|) (bvadd (_ bv4 32) |c_list_add_tail_#in~head#1.offset|)) v_ArrVal_4137) |c_#memory_$Pointer$.offset|)) (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (exists ((v_ArrVal_4138 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_4136 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_4131 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store (store (store |c_old(#memory_$Pointer$.base)| |c_list_add_tail_#in~head#1.base| v_ArrVal_4131) |c_list_add_tail_#in~new#1.base| v_ArrVal_4136) (select (select |c_old(#memory_$Pointer$.base)| |c_list_add_tail_#in~head#1.base|) (bvadd (_ bv4 32) |c_list_add_tail_#in~head#1.offset|)) v_ArrVal_4138) |c_#memory_$Pointer$.base|))) is different from true [2021-12-06 18:11:16,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:11:16,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:11:16,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:11:16,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:11:16,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:11:16,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 39 [2021-12-06 18:11:16,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:11:16,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 47 [2021-12-06 18:11:16,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:11:16,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:11:16,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:11:16,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:11:16,684 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-12-06 18:11:16,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 31 [2021-12-06 18:11:16,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:11:16,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 18:11:16,774 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:11:16,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-06 18:11:16,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:11:19,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:11:19,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:11:22,261 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-12-06 18:11:22,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:11:27,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [29146926] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:11:27,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:11:27,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 39] total 64 [2021-12-06 18:11:27,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338597850] [2021-12-06 18:11:27,203 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:11:27,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-06 18:11:27,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:11:27,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-06 18:11:27,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=4549, Unknown=179, NotChecked=138, Total=5112 [2021-12-06 18:11:27,205 INFO L87 Difference]: Start difference. First operand 237 states and 258 transitions. Second operand has 65 states, 57 states have (on average 1.4210526315789473) internal successors, (81), 54 states have internal predecessors, (81), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-06 18:11:36,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:11:36,860 INFO L93 Difference]: Finished difference Result 239 states and 259 transitions. [2021-12-06 18:11:36,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-06 18:11:36,861 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 57 states have (on average 1.4210526315789473) internal successors, (81), 54 states have internal predecessors, (81), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 56 [2021-12-06 18:11:36,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:11:36,862 INFO L225 Difference]: With dead ends: 239 [2021-12-06 18:11:36,863 INFO L226 Difference]: Without dead ends: 239 [2021-12-06 18:11:36,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 52 SyntacticMatches, 6 SemanticMatches, 82 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1879 ImplicationChecksByTransitivity, 70.7s TimeCoverageRelationStatistics Valid=350, Invalid=6211, Unknown=249, NotChecked=162, Total=6972 [2021-12-06 18:11:36,864 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 20 mSDsluCounter, 1401 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1478 SdHoareTripleChecker+Invalid, 1459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1252 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:11:36,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 1478 Invalid, 1459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 203 Invalid, 0 Unknown, 1252 Unchecked, 0.9s Time] [2021-12-06 18:11:36,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-12-06 18:11:36,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 237. [2021-12-06 18:11:36,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 181 states have (on average 1.1767955801104972) internal successors, (213), 203 states have internal predecessors, (213), 18 states have call successors, (18), 17 states have call predecessors, (18), 18 states have return successors, (26), 16 states have call predecessors, (26), 18 states have call successors, (26) [2021-12-06 18:11:36,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 257 transitions. [2021-12-06 18:11:36,870 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 257 transitions. Word has length 56 [2021-12-06 18:11:36,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:11:36,870 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 257 transitions. [2021-12-06 18:11:36,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 57 states have (on average 1.4210526315789473) internal successors, (81), 54 states have internal predecessors, (81), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-06 18:11:36,871 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 257 transitions. [2021-12-06 18:11:36,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-06 18:11:36,871 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:11:36,871 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:11:36,883 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2021-12-06 18:11:37,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2021-12-06 18:11:37,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 18:11:37,273 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting list_add_tailErr8REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-06 18:11:37,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:11:37,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1649914890, now seen corresponding path program 1 times [2021-12-06 18:11:37,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:11:37,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1952983566] [2021-12-06 18:11:37,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:11:37,277 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:11:37,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:11:37,278 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:11:37,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-12-06 18:11:37,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:11:37,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 103 conjunts are in the unsatisfiable core [2021-12-06 18:11:37,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:11:37,985 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 [2021-12-06 18:11:38,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:11:38,258 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-06 18:11:38,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:11:38,482 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:11:38,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-06 18:11:38,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:11:39,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-06 18:11:39,305 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:11:39,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-06 18:11:39,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:11:39,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:11:39,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:11:39,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:11:39,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:11:39,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:11:39,922 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 18:11:39,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 31 [2021-12-06 18:11:40,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:11:40,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:11:40,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:11:40,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:11:43,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 36 [2021-12-06 18:11:43,644 INFO L354 Elim1Store]: treesize reduction 46, result has 19.3 percent of original size [2021-12-06 18:11:43,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 97 treesize of output 90 [2021-12-06 18:11:43,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:11:43,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 74 [2021-12-06 18:11:43,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 24 [2021-12-06 18:11:43,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 22 [2021-12-06 18:11:44,264 INFO L354 Elim1Store]: treesize reduction 48, result has 43.5 percent of original size [2021-12-06 18:11:44,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 64 [2021-12-06 18:11:44,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2021-12-06 18:11:45,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 28 [2021-12-06 18:11:47,390 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:11:47,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:11:48,606 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4367 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_4367) |c_create_sub_list_insert_sub_~head#1.base|) (bvadd |c_create_sub_list_insert_sub_~head#1.offset| (_ bv4 32))))))))) (_ bv1 1)))) is different from false [2021-12-06 18:11:48,730 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_create_sub_list_insert_sub_~sub~0#1.base_111| (_ BitVec 32)) (v_ArrVal_4366 (_ BitVec 1)) (v_ArrVal_4367 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_111| v_ArrVal_4366) (select (select (store |c_#memory_$Pointer$.base| |v_create_sub_list_insert_sub_~sub~0#1.base_111| v_ArrVal_4367) |c_create_sub_list_~sub#1.base|) (bvadd (_ bv4 32) |c_create_sub_list_~sub#1.offset|)))))))))))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg v_ArrVal_4366)) (_ bv1 1)))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_111|)))))) is different from false [2021-12-06 18:11:50,892 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:11:50,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1952983566] [2021-12-06 18:11:50,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1952983566] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:11:50,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1782494376] [2021-12-06 18:11:50,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:11:50,893 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 18:11:50,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 18:11:50,893 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 18:11:50,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-12-06 18:11:52,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:11:52,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-06 18:11:52,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:11:54,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:11:54,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:11:54,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:11:54,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:11:54,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:11:54,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:11:54,468 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 18:11:54,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 34 [2021-12-06 18:11:54,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:11:54,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:11:54,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:11:54,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:11:56,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 36 [2021-12-06 18:11:56,984 INFO L354 Elim1Store]: treesize reduction 46, result has 19.3 percent of original size [2021-12-06 18:11:56,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 97 treesize of output 90 [2021-12-06 18:11:56,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:11:56,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 74 [2021-12-06 18:11:57,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 24 [2021-12-06 18:11:57,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 22 [2021-12-06 18:11:57,380 INFO L354 Elim1Store]: treesize reduction 48, result has 43.5 percent of original size [2021-12-06 18:11:57,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 66 [2021-12-06 18:11:58,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2021-12-06 18:11:59,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2021-12-06 18:12:00,838 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:12:00,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:12:01,708 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_create_sub_list_insert_sub_~sub~0#1.base_113| (_ BitVec 32)) (v_ArrVal_4541 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_4540 (_ BitVec 1))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_113|))))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_113| v_ArrVal_4540) (select (select (store |c_#memory_$Pointer$.base| |v_create_sub_list_insert_sub_~sub~0#1.base_113| v_ArrVal_4541) |c_create_sub_list_~sub#1.base|) (bvadd (_ bv4 32) |c_create_sub_list_~sub#1.offset|)))))))))) (_ bv1 1))))) is different from false [2021-12-06 18:12:03,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1782494376] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:12:03,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:12:03,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 27] total 42 [2021-12-06 18:12:03,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857284086] [2021-12-06 18:12:03,691 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:12:03,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-06 18:12:03,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:12:03,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-06 18:12:03,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2368, Unknown=24, NotChecked=300, Total=2862 [2021-12-06 18:12:03,692 INFO L87 Difference]: Start difference. First operand 237 states and 257 transitions. Second operand has 43 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 37 states have internal predecessors, (73), 7 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 18:12:14,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:12:14,866 INFO L93 Difference]: Finished difference Result 266 states and 290 transitions. [2021-12-06 18:12:14,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-06 18:12:14,867 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 37 states have internal predecessors, (73), 7 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 57 [2021-12-06 18:12:14,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:12:14,869 INFO L225 Difference]: With dead ends: 266 [2021-12-06 18:12:14,869 INFO L226 Difference]: Without dead ends: 266 [2021-12-06 18:12:14,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 81 SyntacticMatches, 11 SemanticMatches, 83 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1950 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=481, Invalid=6116, Unknown=57, NotChecked=486, Total=7140 [2021-12-06 18:12:14,870 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 95 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 1680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 997 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 18:12:14,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 848 Invalid, 1680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 641 Invalid, 0 Unknown, 997 Unchecked, 2.8s Time] [2021-12-06 18:12:14,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-06 18:12:14,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 252. [2021-12-06 18:12:14,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 194 states have (on average 1.175257731958763) internal successors, (228), 216 states have internal predecessors, (228), 19 states have call successors, (19), 18 states have call predecessors, (19), 19 states have return successors, (27), 17 states have call predecessors, (27), 19 states have call successors, (27) [2021-12-06 18:12:14,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 274 transitions. [2021-12-06 18:12:14,876 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 274 transitions. Word has length 57 [2021-12-06 18:12:14,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:12:14,877 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 274 transitions. [2021-12-06 18:12:14,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 37 states have internal predecessors, (73), 7 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 18:12:14,877 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 274 transitions. [2021-12-06 18:12:14,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-06 18:12:14,878 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:12:14,878 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:12:14,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-12-06 18:12:15,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (44)] Ended with exit code 0 [2021-12-06 18:12:15,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 18:12:15,279 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting list_add_tailErr9REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-06 18:12:15,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:12:15,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1649914891, now seen corresponding path program 1 times [2021-12-06 18:12:15,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:12:15,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1011099239] [2021-12-06 18:12:15,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:12:15,284 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:12:15,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:12:15,284 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:12:15,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-12-06 18:12:16,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:16,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 120 conjunts are in the unsatisfiable core [2021-12-06 18:12:16,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:12:16,052 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 [2021-12-06 18:12:16,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:12:16,332 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-06 18:12:16,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:12:16,558 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:12:16,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-06 18:12:16,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:12:17,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-06 18:12:17,449 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:12:17,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-12-06 18:12:17,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:12:17,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:12:17,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:12:17,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:12:17,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:12:17,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:12:18,106 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 18:12:18,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2021-12-06 18:12:18,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 18:12:18,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:12:18,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:12:18,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:12:18,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:12:23,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 91 [2021-12-06 18:12:23,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:12:23,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 27 [2021-12-06 18:12:23,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 38 [2021-12-06 18:12:23,182 INFO L354 Elim1Store]: treesize reduction 34, result has 24.4 percent of original size [2021-12-06 18:12:23,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 96 treesize of output 87 [2021-12-06 18:12:23,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:12:23,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 67 [2021-12-06 18:12:23,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:12:23,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2021-12-06 18:12:23,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 22 [2021-12-06 18:12:23,822 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-12-06 18:12:23,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 42 [2021-12-06 18:12:23,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 18:12:24,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:12:24,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2021-12-06 18:12:25,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-06 18:12:25,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:12:25,638 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:12:25,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:12:27,693 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_4729 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_4729) |c_create_sub_list_insert_sub_~head#1.base|) (bvadd |c_create_sub_list_insert_sub_~head#1.offset| (_ bv4 32))))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((v_ArrVal_4728 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_4729 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (bvadd |c_create_sub_list_insert_sub_~head#1.offset| (_ bv4 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_4729) |c_create_sub_list_insert_sub_~head#1.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_4728) |c_create_sub_list_insert_sub_~head#1.base|) .cse1)))))) is different from false [2021-12-06 18:12:27,912 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_create_sub_list_insert_sub_~sub~0#1.base_115| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_115|)))) (and (forall ((v_ArrVal_4728 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_4727 (_ BitVec 32)) (v_ArrVal_4729 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (bvadd (_ bv4 32) |c_create_sub_list_~sub#1.offset|))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |v_create_sub_list_insert_sub_~sub~0#1.base_115| v_ArrVal_4729) |c_create_sub_list_~sub#1.base|) .cse0)) (select (store |c_#length| |v_create_sub_list_insert_sub_~sub~0#1.base_115| v_ArrVal_4727) (select (select (store |c_#memory_$Pointer$.base| |v_create_sub_list_insert_sub_~sub~0#1.base_115| v_ArrVal_4728) |c_create_sub_list_~sub#1.base|) .cse0))))) (forall ((v_ArrVal_4729 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |v_create_sub_list_insert_sub_~sub~0#1.base_115| v_ArrVal_4729) |c_create_sub_list_~sub#1.base|) (bvadd (_ bv4 32) |c_create_sub_list_~sub#1.offset|)))) (bvule .cse1 (bvadd (_ bv4 32) .cse1))))))) is different from false [2021-12-06 18:12:35,807 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:12:35,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1011099239] [2021-12-06 18:12:35,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1011099239] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:12:35,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1751912778] [2021-12-06 18:12:35,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:12:35,807 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 18:12:35,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 18:12:35,808 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 18:12:35,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2021-12-06 18:12:39,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:12:39,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 107 conjunts are in the unsatisfiable core [2021-12-06 18:12:39,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:12:41,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:12:41,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:12:41,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:12:41,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:12:41,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:12:41,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:12:41,593 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 18:12:41,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2021-12-06 18:12:41,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 18:12:41,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:12:41,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:12:41,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:12:41,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:12:48,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 88 [2021-12-06 18:12:48,417 INFO L354 Elim1Store]: treesize reduction 46, result has 19.3 percent of original size [2021-12-06 18:12:48,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 163 treesize of output 150 [2021-12-06 18:12:48,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 60 [2021-12-06 18:12:48,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:12:48,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 84 [2021-12-06 18:12:48,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:12:48,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 27 [2021-12-06 18:12:48,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:12:48,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2021-12-06 18:12:48,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 22 [2021-12-06 18:12:48,776 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-12-06 18:12:48,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 41 [2021-12-06 18:12:48,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 18:12:48,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2021-12-06 18:12:48,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:12:49,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:12:49,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-06 18:12:49,700 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:12:49,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:12:49,936 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_4921 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_4921) |c_create_sub_list_insert_sub_~head#1.base|) (bvadd |c_create_sub_list_insert_sub_~head#1.offset| (_ bv4 32))))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((v_ArrVal_4920 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_4921 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (bvadd |c_create_sub_list_insert_sub_~head#1.offset| (_ bv4 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_4921) |c_create_sub_list_insert_sub_~head#1.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_4920) |c_create_sub_list_insert_sub_~head#1.base|) .cse1)))))) is different from false [2021-12-06 18:13:03,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1751912778] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:13:03,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:13:03,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 28] total 44 [2021-12-06 18:13:03,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906892934] [2021-12-06 18:13:03,814 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:13:03,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-06 18:13:03,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:13:03,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-06 18:13:03,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2553, Unknown=39, NotChecked=312, Total=3080 [2021-12-06 18:13:03,816 INFO L87 Difference]: Start difference. First operand 252 states and 274 transitions. Second operand has 45 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 40 states have internal predecessors, (73), 6 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 18:13:35,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:13:35,303 INFO L93 Difference]: Finished difference Result 269 states and 291 transitions. [2021-12-06 18:13:35,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-06 18:13:35,304 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 40 states have internal predecessors, (73), 6 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 57 [2021-12-06 18:13:35,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:13:35,305 INFO L225 Difference]: With dead ends: 269 [2021-12-06 18:13:35,306 INFO L226 Difference]: Without dead ends: 269 [2021-12-06 18:13:35,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 86 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 50.6s TimeCoverageRelationStatistics Valid=523, Invalid=6398, Unknown=63, NotChecked=498, Total=7482 [2021-12-06 18:13:35,307 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 118 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 2217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 752 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:13:35,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 892 Invalid, 2217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1420 Invalid, 0 Unknown, 752 Unchecked, 6.3s Time] [2021-12-06 18:13:35,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-12-06 18:13:35,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 255. [2021-12-06 18:13:35,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 196 states have (on average 1.1683673469387754) internal successors, (229), 219 states have internal predecessors, (229), 19 states have call successors, (19), 18 states have call predecessors, (19), 20 states have return successors, (27), 17 states have call predecessors, (27), 19 states have call successors, (27) [2021-12-06 18:13:35,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 275 transitions. [2021-12-06 18:13:35,314 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 275 transitions. Word has length 57 [2021-12-06 18:13:35,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:13:35,314 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 275 transitions. [2021-12-06 18:13:35,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 40 states have internal predecessors, (73), 6 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 18:13:35,314 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 275 transitions. [2021-12-06 18:13:35,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-06 18:13:35,315 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:13:35,315 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:13:35,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (46)] Ended with exit code 0 [2021-12-06 18:13:35,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-12-06 18:13:35,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:13:35,717 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting list_add_tailErr9REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-06 18:13:35,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:13:35,718 INFO L85 PathProgramCache]: Analyzing trace with hash 994809867, now seen corresponding path program 2 times [2021-12-06 18:13:35,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:13:35,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2085700212] [2021-12-06 18:13:35,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:13:35,719 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:13:35,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:13:35,720 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:13:35,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-12-06 18:13:36,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 18:13:36,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:13:36,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-06 18:13:36,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:13:36,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:13:36,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 18:13:36,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:13:36,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:13:36,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:13:36,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:13:36,765 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:13:36,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-06 18:13:36,879 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:13:36,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-06 18:13:37,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:13:37,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 18:13:37,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 18:13:37,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 18:13:38,316 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 18:13:38,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:13:38,317 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:13:38,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2085700212] [2021-12-06 18:13:38,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2085700212] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:13:38,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:13:38,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 18:13:38,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724308546] [2021-12-06 18:13:38,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:13:38,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 18:13:38,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:13:38,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 18:13:38,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-06 18:13:38,318 INFO L87 Difference]: Start difference. First operand 255 states and 275 transitions. Second operand has 10 states, 8 states have (on average 4.375) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:13:41,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:13:41,950 INFO L93 Difference]: Finished difference Result 255 states and 274 transitions. [2021-12-06 18:13:41,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 18:13:41,951 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.375) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 57 [2021-12-06 18:13:41,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:13:41,953 INFO L225 Difference]: With dead ends: 255 [2021-12-06 18:13:41,953 INFO L226 Difference]: Without dead ends: 255 [2021-12-06 18:13:41,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-06 18:13:41,953 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 14 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:13:41,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 414 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-06 18:13:41,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-12-06 18:13:41,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2021-12-06 18:13:41,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 196 states have (on average 1.163265306122449) internal successors, (228), 219 states have internal predecessors, (228), 19 states have call successors, (19), 18 states have call predecessors, (19), 20 states have return successors, (27), 17 states have call predecessors, (27), 19 states have call successors, (27) [2021-12-06 18:13:41,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 274 transitions. [2021-12-06 18:13:41,959 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 274 transitions. Word has length 57 [2021-12-06 18:13:41,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:13:41,960 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 274 transitions. [2021-12-06 18:13:41,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.375) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:13:41,960 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 274 transitions. [2021-12-06 18:13:41,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 18:13:41,960 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:13:41,961 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:13:41,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2021-12-06 18:13:42,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:13:42,162 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting create_sub_listErr1REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-06 18:13:42,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:13:42,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1484713093, now seen corresponding path program 2 times [2021-12-06 18:13:42,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:13:42,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [381434101] [2021-12-06 18:13:42,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:13:42,165 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:13:42,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:13:42,167 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:13:42,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-12-06 18:13:42,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:13:42,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:13:42,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 18:13:42,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:13:42,675 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 [2021-12-06 18:13:42,689 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 [2021-12-06 18:13:43,134 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 [2021-12-06 18:13:43,659 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:13:43,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-12-06 18:13:46,133 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:13:46,133 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:13:46,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-06 18:13:48,660 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:13:48,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-06 18:14:01,525 INFO L354 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2021-12-06 18:14:01,526 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 2 case distinctions, treesize of input 12 treesize of output 27 [2021-12-06 18:14:01,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-06 18:14:02,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:14:02,304 INFO L354 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2021-12-06 18:14:02,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 35 [2021-12-06 18:14:02,353 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:14:02,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-06 18:14:02,952 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:14:02,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:14:04,580 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 18:14:04,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 18:14:04,646 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 18:14:04,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2021-12-06 18:14:08,271 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:14:08,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [381434101] [2021-12-06 18:14:08,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [381434101] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:14:08,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1787511296] [2021-12-06 18:14:08,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:14:08,272 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 18:14:08,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 18:14:08,273 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 18:14:08,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2021-12-06 18:14:09,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:14:09,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:14:09,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-06 18:14:09,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:14:09,168 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 [2021-12-06 18:14:09,182 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 [2021-12-06 18:14:15,890 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 [2021-12-06 18:14:20,388 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:14:20,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-06 18:14:25,119 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 18:14:25,119 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-06 18:14:25,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-06 18:14:29,954 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:14:29,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-12-06 18:14:31,324 INFO L354 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2021-12-06 18:14:31,325 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 2 case distinctions, treesize of input 12 treesize of output 27 [2021-12-06 18:14:31,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-06 18:14:33,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:14:33,513 INFO L354 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2021-12-06 18:14:33,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 35 [2021-12-06 18:14:33,580 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:14:33,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-12-06 18:14:33,846 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:14:33,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:14:35,806 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 18:14:35,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2021-12-06 18:14:35,879 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 18:14:35,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2021-12-06 18:14:40,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1787511296] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:14:40,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:14:40,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 25 [2021-12-06 18:14:40,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894306818] [2021-12-06 18:14:40,584 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:14:40,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 18:14:40,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:14:40,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 18:14:40,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=833, Unknown=19, NotChecked=0, Total=930 [2021-12-06 18:14:40,585 INFO L87 Difference]: Start difference. First operand 255 states and 274 transitions. Second operand has 26 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-06 18:14:53,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:14:53,880 INFO L93 Difference]: Finished difference Result 301 states and 339 transitions. [2021-12-06 18:14:53,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 18:14:53,882 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 61 [2021-12-06 18:14:53,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:14:53,883 INFO L225 Difference]: With dead ends: 301 [2021-12-06 18:14:53,884 INFO L226 Difference]: Without dead ends: 301 [2021-12-06 18:14:53,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 55.8s TimeCoverageRelationStatistics Valid=118, Invalid=1118, Unknown=24, NotChecked=0, Total=1260 [2021-12-06 18:14:53,885 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 79 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 581 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:14:53,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 782 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 573 Invalid, 0 Unknown, 581 Unchecked, 2.4s Time] [2021-12-06 18:14:53,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-12-06 18:14:53,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 261. [2021-12-06 18:14:53,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 201 states have (on average 1.164179104477612) internal successors, (234), 224 states have internal predecessors, (234), 20 states have call successors, (20), 18 states have call predecessors, (20), 20 states have return successors, (28), 18 states have call predecessors, (28), 20 states have call successors, (28) [2021-12-06 18:14:53,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 282 transitions. [2021-12-06 18:14:53,896 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 282 transitions. Word has length 61 [2021-12-06 18:14:53,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:14:53,896 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 282 transitions. [2021-12-06 18:14:53,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-06 18:14:53,896 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 282 transitions. [2021-12-06 18:14:53,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 18:14:53,898 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:14:53,898 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:14:53,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (48)] Ended with exit code 0 [2021-12-06 18:14:54,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (49)] Forceful destruction successful, exit code 0 [2021-12-06 18:14:54,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 18:14:54,300 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-06 18:14:54,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:14:54,301 INFO L85 PathProgramCache]: Analyzing trace with hash -874034692, now seen corresponding path program 1 times [2021-12-06 18:14:54,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:14:54,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1321097216] [2021-12-06 18:14:54,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:14:54,303 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:14:54,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:14:54,305 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:14:54,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-12-06 18:14:54,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:54,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 18:14:54,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:14:55,088 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-06 18:14:55,089 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:14:55,089 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:14:55,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1321097216] [2021-12-06 18:14:55,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1321097216] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:14:55,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:14:55,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:14:55,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95351934] [2021-12-06 18:14:55,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:14:55,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 18:14:55,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:14:55,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 18:14:55,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:14:55,090 INFO L87 Difference]: Start difference. First operand 261 states and 282 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 18:14:56,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:14:56,041 INFO L93 Difference]: Finished difference Result 267 states and 290 transitions. [2021-12-06 18:14:56,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 18:14:56,042 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 63 [2021-12-06 18:14:56,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:14:56,044 INFO L225 Difference]: With dead ends: 267 [2021-12-06 18:14:56,044 INFO L226 Difference]: Without dead ends: 267 [2021-12-06 18:14:56,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:14:56,044 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 86 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:14:56,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 309 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 18:14:56,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-12-06 18:14:56,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 260. [2021-12-06 18:14:56,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 201 states have (on average 1.1592039800995024) internal successors, (233), 223 states have internal predecessors, (233), 20 states have call successors, (20), 18 states have call predecessors, (20), 20 states have return successors, (28), 18 states have call predecessors, (28), 20 states have call successors, (28) [2021-12-06 18:14:56,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 281 transitions. [2021-12-06 18:14:56,050 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 281 transitions. Word has length 63 [2021-12-06 18:14:56,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:14:56,051 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 281 transitions. [2021-12-06 18:14:56,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 18:14:56,051 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 281 transitions. [2021-12-06 18:14:56,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 18:14:56,051 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:14:56,052 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:14:56,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-12-06 18:14:56,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:14:56,253 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-06 18:14:56,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:14:56,254 INFO L85 PathProgramCache]: Analyzing trace with hash -874034691, now seen corresponding path program 1 times [2021-12-06 18:14:56,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:14:56,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [474788515] [2021-12-06 18:14:56,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:14:56,256 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:14:56,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:14:56,258 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:14:56,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-12-06 18:14:56,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:56,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 18:14:56,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:14:57,195 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-06 18:14:57,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:14:57,195 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:14:57,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [474788515] [2021-12-06 18:14:57,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [474788515] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:14:57,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:14:57,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 18:14:57,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858925535] [2021-12-06 18:14:57,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:14:57,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 18:14:57,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:14:57,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 18:14:57,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:14:57,197 INFO L87 Difference]: Start difference. First operand 260 states and 281 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 18:14:58,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:14:58,290 INFO L93 Difference]: Finished difference Result 259 states and 280 transitions. [2021-12-06 18:14:58,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:14:58,292 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 63 [2021-12-06 18:14:58,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:14:58,293 INFO L225 Difference]: With dead ends: 259 [2021-12-06 18:14:58,293 INFO L226 Difference]: Without dead ends: 259 [2021-12-06 18:14:58,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:14:58,294 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 83 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:14:58,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 292 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 18:14:58,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-12-06 18:14:58,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2021-12-06 18:14:58,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 201 states have (on average 1.154228855721393) internal successors, (232), 222 states have internal predecessors, (232), 20 states have call successors, (20), 18 states have call predecessors, (20), 20 states have return successors, (28), 18 states have call predecessors, (28), 20 states have call successors, (28) [2021-12-06 18:14:58,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 280 transitions. [2021-12-06 18:14:58,300 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 280 transitions. Word has length 63 [2021-12-06 18:14:58,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:14:58,301 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 280 transitions. [2021-12-06 18:14:58,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 18:14:58,301 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 280 transitions. [2021-12-06 18:14:58,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 18:14:58,302 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:14:58,302 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:14:58,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (51)] Ended with exit code 0 [2021-12-06 18:14:58,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 18:14:58,503 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-06 18:14:58,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:14:58,504 INFO L85 PathProgramCache]: Analyzing trace with hash 2019287991, now seen corresponding path program 1 times [2021-12-06 18:14:58,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:14:58,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [93690421] [2021-12-06 18:14:58,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:14:58,506 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:14:58,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:14:58,508 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:14:58,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-12-06 18:14:59,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:14:59,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 143 conjunts are in the unsatisfiable core [2021-12-06 18:14:59,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:14:59,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:14:59,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2021-12-06 18:14:59,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:14:59,769 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-06 18:14:59,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 45 [2021-12-06 18:15:00,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:15:00,222 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:15:00,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2021-12-06 18:15:00,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-06 18:15:00,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-06 18:15:07,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-06 18:15:10,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:15:10,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:15:10,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:15:10,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:15:10,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 45 [2021-12-06 18:15:10,588 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-06 18:15:10,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 53 [2021-12-06 18:15:10,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:15:10,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:15:10,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:15:10,714 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-12-06 18:15:10,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 37 [2021-12-06 18:15:10,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:15:10,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:15:10,872 INFO L354 Elim1Store]: treesize reduction 9, result has 64.0 percent of original size [2021-12-06 18:15:10,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 45 [2021-12-06 18:15:10,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:15:11,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-06 18:15:11,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-06 18:15:11,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-06 18:15:21,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 18:15:23,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:15:23,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:15:23,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:15:23,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:15:23,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 45 [2021-12-06 18:15:23,260 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-06 18:15:23,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 53 [2021-12-06 18:15:23,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:15:23,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:15:23,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:15:23,404 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-12-06 18:15:23,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 37 [2021-12-06 18:15:23,471 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:15:23,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-06 18:15:23,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:15:24,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-06 18:15:24,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-12-06 18:15:27,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2021-12-06 18:15:29,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 66 [2021-12-06 18:15:29,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 42 [2021-12-06 18:15:30,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 29 [2021-12-06 18:15:31,374 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 18:15:31,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:15:33,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 80 [2021-12-06 18:15:33,630 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:15:33,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [93690421] [2021-12-06 18:15:33,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [93690421] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:15:33,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1800068908] [2021-12-06 18:15:33,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:15:33,631 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 18:15:33,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 18:15:33,631 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 18:15:33,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2021-12-06 18:15:36,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:15:36,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 151 conjunts are in the unsatisfiable core [2021-12-06 18:15:36,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:15:36,713 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 [2021-12-06 18:15:37,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:15:37,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:15:37,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-06 18:15:50,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-06 18:15:52,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:15:53,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:15:53,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:15:53,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:15:53,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:15:53,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 47 [2021-12-06 18:15:53,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:15:53,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:15:53,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 55 [2021-12-06 18:15:53,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:15:53,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:15:53,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:15:53,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:15:53,210 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-12-06 18:15:53,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 37 [2021-12-06 18:15:53,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:15:53,269 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:15:53,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-12-06 18:15:53,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:15:53,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:15:53,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-06 18:16:10,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2021-12-06 18:16:20,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:16:20,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:16:20,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:16:20,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:16:20,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:16:20,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 41 [2021-12-06 18:16:20,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:16:20,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 49 [2021-12-06 18:16:20,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:16:20,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:16:20,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:16:20,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:16:20,880 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-12-06 18:16:20,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 33 [2021-12-06 18:16:20,994 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 18:16:20,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 31 [2021-12-06 18:16:21,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:16:22,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:16:22,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:16:29,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2021-12-06 18:16:31,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 63 [2021-12-06 18:16:31,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 39 [2021-12-06 18:16:38,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 29 [2021-12-06 18:16:41,797 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:16:41,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:16:43,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 78 [2021-12-06 18:16:44,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1800068908] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:16:44,011 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:16:44,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 44] total 68 [2021-12-06 18:16:44,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205903941] [2021-12-06 18:16:44,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:16:44,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-06 18:16:44,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 18:16:44,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-06 18:16:44,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=4797, Unknown=86, NotChecked=0, Total=5112 [2021-12-06 18:16:44,013 INFO L87 Difference]: Start difference. First operand 259 states and 280 transitions. Second operand has 69 states, 61 states have (on average 1.459016393442623) internal successors, (89), 58 states have internal predecessors, (89), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 18:17:07,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:17:07,490 INFO L93 Difference]: Finished difference Result 269 states and 293 transitions. [2021-12-06 18:17:07,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-06 18:17:07,492 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 61 states have (on average 1.459016393442623) internal successors, (89), 58 states have internal predecessors, (89), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 66 [2021-12-06 18:17:07,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:17:07,493 INFO L225 Difference]: With dead ends: 269 [2021-12-06 18:17:07,493 INFO L226 Difference]: Without dead ends: 269 [2021-12-06 18:17:07,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 59 SyntacticMatches, 19 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2102 ImplicationChecksByTransitivity, 98.0s TimeCoverageRelationStatistics Valid=320, Invalid=6690, Unknown=130, NotChecked=0, Total=7140 [2021-12-06 18:17:07,494 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 22 mSDsluCounter, 1324 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1393 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1292 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:17:07,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 1393 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 116 Invalid, 0 Unknown, 1292 Unchecked, 0.6s Time] [2021-12-06 18:17:07,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-12-06 18:17:07,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 266. [2021-12-06 18:17:07,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 208 states have (on average 1.1634615384615385) internal successors, (242), 228 states have internal predecessors, (242), 20 states have call successors, (20), 18 states have call predecessors, (20), 20 states have return successors, (28), 19 states have call predecessors, (28), 20 states have call successors, (28) [2021-12-06 18:17:07,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 290 transitions. [2021-12-06 18:17:07,500 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 290 transitions. Word has length 66 [2021-12-06 18:17:07,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:17:07,501 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 290 transitions. [2021-12-06 18:17:07,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 61 states have (on average 1.459016393442623) internal successors, (89), 58 states have internal predecessors, (89), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 18:17:07,501 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 290 transitions. [2021-12-06 18:17:07,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 18:17:07,502 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:17:07,502 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:17:07,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (52)] Ended with exit code 0 [2021-12-06 18:17:07,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (53)] Ended with exit code 0 [2021-12-06 18:17:07,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 18:17:07,903 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [create_sub_listErr0REQUIRES_VIOLATION, create_sub_listErr1REQUIRES_VIOLATION, create_sub_listErr2REQUIRES_VIOLATION, create_sub_listErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-06 18:17:07,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:17:07,904 INFO L85 PathProgramCache]: Analyzing trace with hash 2019287992, now seen corresponding path program 1 times [2021-12-06 18:17:07,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 18:17:07,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1519858700] [2021-12-06 18:17:07,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:17:07,906 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 18:17:07,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 18:17:07,908 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 18:17:07,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-12-06 18:17:08,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:08,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 164 conjunts are in the unsatisfiable core [2021-12-06 18:17:08,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:17:08,909 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 [2021-12-06 18:17:09,097 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 18:17:09,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-12-06 18:17:09,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 18:17:09,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-12-06 18:17:09,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:17:09,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:17:09,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:17:16,727 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 [2021-12-06 18:17:16,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-06 18:17:19,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:17:19,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:17:19,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:17:19,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:17:19,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 45 [2021-12-06 18:17:20,011 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-06 18:17:20,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 53 [2021-12-06 18:17:20,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:17:20,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:17:20,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:17:20,147 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-12-06 18:17:20,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 37 [2021-12-06 18:17:20,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:17:20,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 18:17:20,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:17:20,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:17:20,251 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:17:20,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 25 [2021-12-06 18:17:20,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:17:20,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:17:20,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:17:20,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-06 18:17:30,987 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 6 treesize of output 5 [2021-12-06 18:17:30,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-06 18:17:34,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:17:34,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:17:34,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:17:34,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:17:34,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 47 [2021-12-06 18:17:34,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:17:34,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 55 [2021-12-06 18:17:34,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:17:34,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:17:34,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:17:35,036 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-12-06 18:17:35,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 37 [2021-12-06 18:17:35,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:17:35,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 18:17:35,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:17:35,176 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:17:35,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-06 18:17:35,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:17:35,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:17:39,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2021-12-06 18:17:40,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2021-12-06 18:17:41,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 74 [2021-12-06 18:17:41,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 44 [2021-12-06 18:17:43,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2021-12-06 18:17:43,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 18:17:44,369 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:17:44,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:17:47,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 116 [2021-12-06 18:17:47,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 154 [2021-12-06 18:17:48,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 52 [2021-12-06 18:17:48,901 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 18:17:48,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1519858700] [2021-12-06 18:17:48,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1519858700] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:17:48,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [292997117] [2021-12-06 18:17:48,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:17:48,902 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 18:17:48,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 18:17:48,903 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 18:17:48,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad39c96d-95af-4738-ba27-6752a27459f2/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2021-12-06 18:17:51,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:17:51,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 165 conjunts are in the unsatisfiable core [2021-12-06 18:17:51,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:17:52,118 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 [2021-12-06 18:17:52,138 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 [2021-12-06 18:17:52,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-06 18:17:52,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:17:52,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:17:52,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:17:58,458 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 [2021-12-06 18:17:58,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 18:18:01,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:18:01,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:18:01,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:18:01,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:18:01,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 18:18:01,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 47 [2021-12-06 18:18:01,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:18:01,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:18:01,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 55 [2021-12-06 18:18:01,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:18:01,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:18:01,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:18:01,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:18:01,408 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-12-06 18:18:01,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 37 [2021-12-06 18:18:01,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:18:01,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 18:18:01,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:18:01,494 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 18:18:01,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-06 18:18:02,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 18:18:02,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 18:18:02,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 18:18:02,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3