./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF --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 28b4a2248017400eafcc33919e1388faa83abd48459a3d9191abc0a1d3b17a56 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:42:16,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:42:16,372 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:42:16,431 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:42:16,431 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:42:16,433 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:42:16,435 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:42:16,438 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:42:16,441 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:42:16,442 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:42:16,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:42:16,446 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:42:16,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:42:16,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:42:16,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:42:16,452 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:42:16,454 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:42:16,455 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:42:16,458 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:42:16,462 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:42:16,464 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:42:16,466 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:42:16,468 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:42:16,470 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:42:16,475 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:42:16,475 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:42:16,476 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:42:16,477 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:42:16,478 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:42:16,479 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:42:16,480 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:42:16,481 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:42:16,482 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:42:16,484 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:42:16,485 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:42:16,486 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:42:16,487 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:42:16,489 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:42:16,490 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:42:16,491 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:42:16,493 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:42:16,495 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-20 07:42:16,547 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:42:16,547 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:42:16,548 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:42:16,548 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:42:16,551 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:42:16,551 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:42:16,552 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:42:16,552 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:42:16,553 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:42:16,553 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:42:16,554 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:42:16,554 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 07:42:16,555 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:42:16,555 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:42:16,555 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:42:16,556 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 07:42:16,556 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 07:42:16,556 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 07:42:16,556 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:42:16,557 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 07:42:16,557 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:42:16,557 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:42:16,557 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:42:16,558 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:42:16,558 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:42:16,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:42:16,558 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:42:16,559 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:42:16,559 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:42:16,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:42:16,561 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:42:16,561 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_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 28b4a2248017400eafcc33919e1388faa83abd48459a3d9191abc0a1d3b17a56 [2021-11-20 07:42:16,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:42:16,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:42:16,941 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:42:16,942 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:42:16,943 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:42:16,945 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-1.i [2021-11-20 07:42:17,044 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/data/d019ab360/4a447474d5a8488c9b927619770f66c5/FLAGb6882283b [2021-11-20 07:42:17,745 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:42:17,745 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/sv-benchmarks/c/ldv-memsafety/memleaks_test12-1.i [2021-11-20 07:42:17,769 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/data/d019ab360/4a447474d5a8488c9b927619770f66c5/FLAGb6882283b [2021-11-20 07:42:17,969 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/data/d019ab360/4a447474d5a8488c9b927619770f66c5 [2021-11-20 07:42:17,972 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:42:17,973 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:42:17,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:42:17,975 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:42:17,980 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:42:17,981 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:42:17" (1/1) ... [2021-11-20 07:42:17,982 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@558efee2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:42:17, skipping insertion in model container [2021-11-20 07:42:17,982 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:42:17" (1/1) ... [2021-11-20 07:42:17,991 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:42:18,043 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:42:18,647 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:42:18,683 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-20 07:42:18,684 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@11d123b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:42:18, skipping insertion in model container [2021-11-20 07:42:18,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:42:18,685 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-20 07:42:18,688 INFO L158 Benchmark]: Toolchain (without parser) took 712.44ms. Allocated memory was 90.2MB in the beginning and 113.2MB in the end (delta: 23.1MB). Free memory was 51.5MB in the beginning and 82.2MB in the end (delta: -30.7MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. [2021-11-20 07:42:18,690 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 90.2MB. Free memory is still 69.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 07:42:18,692 INFO L158 Benchmark]: CACSL2BoogieTranslator took 709.59ms. Allocated memory was 90.2MB in the beginning and 113.2MB in the end (delta: 23.1MB). Free memory was 51.3MB in the beginning and 82.2MB in the end (delta: -30.9MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. [2021-11-20 07:42:18,694 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 90.2MB. Free memory is still 69.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 709.59ms. Allocated memory was 90.2MB in the beginning and 113.2MB in the end (delta: 23.1MB). Free memory was 51.3MB in the beginning and 82.2MB in the end (delta: -30.9MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: 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_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF --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 28b4a2248017400eafcc33919e1388faa83abd48459a3d9191abc0a1d3b17a56 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:42:21,324 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:42:21,326 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:42:21,386 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:42:21,387 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:42:21,393 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:42:21,395 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:42:21,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:42:21,408 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:42:21,415 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:42:21,417 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:42:21,420 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:42:21,421 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:42:21,424 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:42:21,428 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:42:21,433 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:42:21,436 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:42:21,437 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:42:21,440 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:42:21,450 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:42:21,453 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:42:21,454 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:42:21,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:42:21,459 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:42:21,462 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:42:21,463 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:42:21,464 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:42:21,465 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:42:21,465 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:42:21,467 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:42:21,467 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:42:21,468 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:42:21,470 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:42:21,471 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:42:21,472 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:42:21,472 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:42:21,473 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:42:21,474 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:42:21,474 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:42:21,475 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:42:21,476 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:42:21,477 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-20 07:42:21,508 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:42:21,508 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:42:21,509 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:42:21,509 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:42:21,510 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:42:21,510 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:42:21,511 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:42:21,511 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:42:21,511 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:42:21,512 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:42:21,512 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:42:21,512 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 07:42:21,512 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:42:21,513 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:42:21,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:42:21,513 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 07:42:21,513 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 07:42:21,513 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 07:42:21,514 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:42:21,514 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 07:42:21,514 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 07:42:21,514 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 07:42:21,515 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:42:21,515 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:42:21,515 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:42:21,515 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:42:21,516 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:42:21,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:42:21,516 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:42:21,516 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:42:21,517 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-20 07:42:21,517 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 07:42:21,517 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:42:21,517 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 07:42:21,518 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_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 28b4a2248017400eafcc33919e1388faa83abd48459a3d9191abc0a1d3b17a56 [2021-11-20 07:42:21,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:42:22,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:42:22,031 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:42:22,033 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:42:22,033 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:42:22,035 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-1.i [2021-11-20 07:42:22,135 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/data/25506c291/7ee8d4ba78b7461784170282d038bded/FLAG932b696fd [2021-11-20 07:42:22,909 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:42:22,910 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/sv-benchmarks/c/ldv-memsafety/memleaks_test12-1.i [2021-11-20 07:42:22,934 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/data/25506c291/7ee8d4ba78b7461784170282d038bded/FLAG932b696fd [2021-11-20 07:42:22,950 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/data/25506c291/7ee8d4ba78b7461784170282d038bded [2021-11-20 07:42:22,953 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:42:22,955 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:42:22,959 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:42:22,959 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:42:22,963 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:42:22,964 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:42:22" (1/1) ... [2021-11-20 07:42:22,966 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@425b85f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:42:22, skipping insertion in model container [2021-11-20 07:42:22,966 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:42:22" (1/1) ... [2021-11-20 07:42:22,974 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:42:23,053 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:42:23,804 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:42:23,829 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-20 07:42:23,848 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:42:23,944 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:42:23,959 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:42:24,041 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:42:24,095 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:42:24,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:42:24 WrapperNode [2021-11-20 07:42:24,096 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:42:24,097 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:42:24,098 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:42:24,098 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:42:24,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:42:24" (1/1) ... [2021-11-20 07:42:24,147 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:42:24" (1/1) ... [2021-11-20 07:42:24,196 INFO L137 Inliner]: procedures = 179, calls = 145, calls flagged for inlining = 33, calls inlined = 20, statements flattened = 331 [2021-11-20 07:42:24,196 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:42:24,197 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:42:24,198 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:42:24,198 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:42:24,208 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:42:24" (1/1) ... [2021-11-20 07:42:24,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:42:24" (1/1) ... [2021-11-20 07:42:24,218 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:42:24" (1/1) ... [2021-11-20 07:42:24,218 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:42:24" (1/1) ... [2021-11-20 07:42:24,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:42:24" (1/1) ... [2021-11-20 07:42:24,253 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:42:24" (1/1) ... [2021-11-20 07:42:24,258 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:42:24" (1/1) ... [2021-11-20 07:42:24,267 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:42:24,286 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:42:24,286 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:42:24,286 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:42:24,287 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:42:24" (1/1) ... [2021-11-20 07:42:24,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:42:24,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:42:24,321 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:42:24,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:42:24,382 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-20 07:42:24,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-20 07:42:24,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-20 07:42:24,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-20 07:42:24,383 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-20 07:42:24,383 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-20 07:42:24,384 INFO L130 BoogieDeclarations]: Found specification of procedure LDV_INIT_LIST_HEAD [2021-11-20 07:42:24,384 INFO L138 BoogieDeclarations]: Found implementation of procedure LDV_INIT_LIST_HEAD [2021-11-20 07:42:24,385 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2021-11-20 07:42:24,385 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2021-11-20 07:42:24,385 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-20 07:42:24,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-20 07:42:24,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-20 07:42:24,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-20 07:42:24,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 07:42:24,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:42:24,386 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_msg_free [2021-11-20 07:42:24,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_msg_free [2021-11-20 07:42:24,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 07:42:24,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 07:42:24,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-20 07:42:24,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 07:42:24,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-20 07:42:24,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 07:42:24,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 07:42:24,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-20 07:42:24,388 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-20 07:42:24,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:42:24,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:42:24,695 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:42:24,697 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:42:24,703 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-20 07:42:26,028 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:42:26,048 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:42:26,049 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-20 07:42:26,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:42:26 BoogieIcfgContainer [2021-11-20 07:42:26,055 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:42:26,057 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:42:26,059 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:42:26,062 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:42:26,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:42:22" (1/3) ... [2021-11-20 07:42:26,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67a50321 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:42:26, skipping insertion in model container [2021-11-20 07:42:26,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:42:24" (2/3) ... [2021-11-20 07:42:26,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67a50321 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:42:26, skipping insertion in model container [2021-11-20 07:42:26,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:42:26" (3/3) ... [2021-11-20 07:42:26,065 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test12-1.i [2021-11-20 07:42:26,071 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:42:26,072 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 124 error locations. [2021-11-20 07:42:26,139 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:42:26,149 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 07:42:26,149 INFO L340 AbstractCegarLoop]: Starting to check reachability of 124 error locations. [2021-11-20 07:42:26,185 INFO L276 IsEmpty]: Start isEmpty. Operand has 313 states, 171 states have (on average 1.8654970760233918) internal successors, (319), 294 states have internal predecessors, (319), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-20 07:42:26,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 07:42:26,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:42:26,195 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:42:26,196 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:42:26,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:42:26,203 INFO L85 PathProgramCache]: Analyzing trace with hash -297378988, now seen corresponding path program 1 times [2021-11-20 07:42:26,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:42:26,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899370282] [2021-11-20 07:42:26,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:42:26,219 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:42:26,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:42:26,225 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:42:26,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 07:42:26,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:42:26,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 07:42:26,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:42:26,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:42:26,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:42:26,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:42:26,813 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:42:26,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899370282] [2021-11-20 07:42:26,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [899370282] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:42:26,815 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:42:26,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-11-20 07:42:26,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298949549] [2021-11-20 07:42:26,817 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:42:26,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:42:26,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:42:26,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:42:26,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:42:26,877 INFO L87 Difference]: Start difference. First operand has 313 states, 171 states have (on average 1.8654970760233918) internal successors, (319), 294 states have internal predecessors, (319), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:42:28,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:42:28,354 INFO L93 Difference]: Finished difference Result 455 states and 504 transitions. [2021-11-20 07:42:28,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:42:28,361 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 11 [2021-11-20 07:42:28,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:42:28,381 INFO L225 Difference]: With dead ends: 455 [2021-11-20 07:42:28,381 INFO L226 Difference]: Without dead ends: 449 [2021-11-20 07:42:28,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:42:28,393 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 866 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:42:28,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [871 Valid, 500 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 07:42:28,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-11-20 07:42:28,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 346. [2021-11-20 07:42:28,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 201 states have (on average 1.8258706467661692) internal successors, (367), 323 states have internal predecessors, (367), 17 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (20), 17 states have call predecessors, (20), 17 states have call successors, (20) [2021-11-20 07:42:28,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 404 transitions. [2021-11-20 07:42:28,521 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 404 transitions. Word has length 11 [2021-11-20 07:42:28,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:42:28,523 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 404 transitions. [2021-11-20 07:42:28,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:42:28,523 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 404 transitions. [2021-11-20 07:42:28,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 07:42:28,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:42:28,525 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:42:28,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:42:28,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:42:28,738 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr90REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:42:28,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:42:28,740 INFO L85 PathProgramCache]: Analyzing trace with hash -297378987, now seen corresponding path program 1 times [2021-11-20 07:42:28,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:42:28,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [27085995] [2021-11-20 07:42:28,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:42:28,746 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:42:28,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:42:28,748 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:42:28,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 07:42:28,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:42:28,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 07:42:28,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:42:29,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:42:29,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:42:29,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:42:29,394 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:42:29,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [27085995] [2021-11-20 07:42:29,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [27085995] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:42:29,395 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:42:29,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-11-20 07:42:29,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477564743] [2021-11-20 07:42:29,396 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:42:29,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:42:29,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:42:29,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:42:29,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:42:29,398 INFO L87 Difference]: Start difference. First operand 346 states and 404 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:42:31,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:42:31,524 INFO L93 Difference]: Finished difference Result 503 states and 596 transitions. [2021-11-20 07:42:31,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:42:31,526 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 11 [2021-11-20 07:42:31,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:42:31,530 INFO L225 Difference]: With dead ends: 503 [2021-11-20 07:42:31,531 INFO L226 Difference]: Without dead ends: 503 [2021-11-20 07:42:31,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:42:31,533 INFO L933 BasicCegarLoop]: 361 mSDtfsCounter, 340 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:42:31,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 972 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-20 07:42:31,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-11-20 07:42:31,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 377. [2021-11-20 07:42:31,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 227 states have (on average 1.8193832599118942) internal successors, (413), 349 states have internal predecessors, (413), 20 states have call successors, (20), 8 states have call predecessors, (20), 10 states have return successors, (33), 21 states have call predecessors, (33), 20 states have call successors, (33) [2021-11-20 07:42:31,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 466 transitions. [2021-11-20 07:42:31,604 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 466 transitions. Word has length 11 [2021-11-20 07:42:31,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:42:31,605 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 466 transitions. [2021-11-20 07:42:31,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:42:31,605 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 466 transitions. [2021-11-20 07:42:31,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 07:42:31,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:42:31,606 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:42:31,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:42:31,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:42:31,819 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr90REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:42:31,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:42:31,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1184882668, now seen corresponding path program 1 times [2021-11-20 07:42:31,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:42:31,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1737388422] [2021-11-20 07:42:31,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:42:31,821 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:42:31,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:42:31,822 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:42:31,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 07:42:31,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:42:31,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 07:42:31,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:42:31,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:42:31,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:42:31,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:42:31,994 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:42:31,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1737388422] [2021-11-20 07:42:31,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1737388422] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:42:31,995 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:42:31,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-20 07:42:31,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317974437] [2021-11-20 07:42:31,996 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:42:31,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:42:31,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:42:31,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:42:31,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:42:31,998 INFO L87 Difference]: Start difference. First operand 377 states and 466 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 07:42:32,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:42:32,159 INFO L93 Difference]: Finished difference Result 632 states and 765 transitions. [2021-11-20 07:42:32,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:42:32,161 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-20 07:42:32,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:42:32,167 INFO L225 Difference]: With dead ends: 632 [2021-11-20 07:42:32,167 INFO L226 Difference]: Without dead ends: 632 [2021-11-20 07:42:32,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:42:32,169 INFO L933 BasicCegarLoop]: 390 mSDtfsCounter, 259 mSDsluCounter, 1111 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 1501 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:42:32,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 1501 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:42:32,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-11-20 07:42:32,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 375. [2021-11-20 07:42:32,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 225 states have (on average 1.8177777777777777) internal successors, (409), 347 states have internal predecessors, (409), 20 states have call successors, (20), 8 states have call predecessors, (20), 10 states have return successors, (33), 21 states have call predecessors, (33), 20 states have call successors, (33) [2021-11-20 07:42:32,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 462 transitions. [2021-11-20 07:42:32,195 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 462 transitions. Word has length 11 [2021-11-20 07:42:32,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:42:32,195 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 462 transitions. [2021-11-20 07:42:32,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 07:42:32,196 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 462 transitions. [2021-11-20 07:42:32,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 07:42:32,197 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:42:32,197 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:42:32,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:42:32,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:42:32,410 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr91REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:42:32,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:42:32,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1981613461, now seen corresponding path program 1 times [2021-11-20 07:42:32,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:42:32,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [479219083] [2021-11-20 07:42:32,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:42:32,413 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:42:32,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:42:32,414 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:42:32,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 07:42:32,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:42:32,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 07:42:32,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:42:32,733 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 [2021-11-20 07:42:32,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:42:32,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:42:32,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:42:32,946 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:42:32,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [479219083] [2021-11-20 07:42:32,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [479219083] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:42:32,947 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:42:32,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 8 [2021-11-20 07:42:32,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345929926] [2021-11-20 07:42:32,948 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:42:32,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 07:42:32,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:42:32,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 07:42:32,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:42:32,950 INFO L87 Difference]: Start difference. First operand 375 states and 462 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:42:35,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:42:35,084 INFO L93 Difference]: Finished difference Result 442 states and 535 transitions. [2021-11-20 07:42:35,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:42:35,087 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 13 [2021-11-20 07:42:35,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:42:35,091 INFO L225 Difference]: With dead ends: 442 [2021-11-20 07:42:35,091 INFO L226 Difference]: Without dead ends: 442 [2021-11-20 07:42:35,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:42:35,093 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 172 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 1197 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:42:35,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 1197 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-20 07:42:35,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-11-20 07:42:35,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 387. [2021-11-20 07:42:35,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 234 states have (on average 1.7991452991452992) internal successors, (421), 357 states have internal predecessors, (421), 20 states have call successors, (20), 10 states have call predecessors, (20), 13 states have return successors, (33), 21 states have call predecessors, (33), 20 states have call successors, (33) [2021-11-20 07:42:35,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 474 transitions. [2021-11-20 07:42:35,112 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 474 transitions. Word has length 13 [2021-11-20 07:42:35,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:42:35,113 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 474 transitions. [2021-11-20 07:42:35,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:42:35,114 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 474 transitions. [2021-11-20 07:42:35,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 07:42:35,114 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:42:35,115 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:42:35,126 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-20 07:42:35,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:42:35,326 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr92REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:42:35,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:42:35,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1981613462, now seen corresponding path program 1 times [2021-11-20 07:42:35,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:42:35,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1831211801] [2021-11-20 07:42:35,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:42:35,327 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:42:35,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:42:35,328 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:42:35,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 07:42:35,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:42:35,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 07:42:35,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:42:35,750 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 [2021-11-20 07:42:35,763 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 [2021-11-20 07:42:35,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:42:35,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:42:36,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:42:36,344 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:42:36,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1831211801] [2021-11-20 07:42:36,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1831211801] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:42:36,344 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:42:36,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 8 [2021-11-20 07:42:36,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665348425] [2021-11-20 07:42:36,344 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:42:36,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 07:42:36,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:42:36,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 07:42:36,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:42:36,346 INFO L87 Difference]: Start difference. First operand 387 states and 474 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:42:40,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:42:40,707 INFO L93 Difference]: Finished difference Result 429 states and 513 transitions. [2021-11-20 07:42:40,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:42:40,708 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 13 [2021-11-20 07:42:40,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:42:40,712 INFO L225 Difference]: With dead ends: 429 [2021-11-20 07:42:40,712 INFO L226 Difference]: Without dead ends: 429 [2021-11-20 07:42:40,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:42:40,714 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 105 mSDsluCounter, 1384 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 1709 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:42:40,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 1709 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1101 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-20 07:42:40,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-11-20 07:42:40,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 396. [2021-11-20 07:42:40,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 243 states have (on average 1.786008230452675) internal successors, (434), 366 states have internal predecessors, (434), 20 states have call successors, (20), 10 states have call predecessors, (20), 13 states have return successors, (33), 21 states have call predecessors, (33), 20 states have call successors, (33) [2021-11-20 07:42:40,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 487 transitions. [2021-11-20 07:42:40,732 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 487 transitions. Word has length 13 [2021-11-20 07:42:40,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:42:40,733 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 487 transitions. [2021-11-20 07:42:40,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:42:40,733 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 487 transitions. [2021-11-20 07:42:40,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 07:42:40,734 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:42:40,735 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:42:40,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 07:42:40,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:42:40,947 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr86ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:42:40,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:42:40,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1895308392, now seen corresponding path program 1 times [2021-11-20 07:42:40,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:42:40,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [749742418] [2021-11-20 07:42:40,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:42:40,949 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:42:40,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:42:40,950 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:42:40,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 07:42:41,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:42:41,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:42:41,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:42:41,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:42:41,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:42:41,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:42:41,217 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:42:41,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [749742418] [2021-11-20 07:42:41,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [749742418] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 07:42:41,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:42:41,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-20 07:42:41,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358893937] [2021-11-20 07:42:41,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:42:41,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:42:41,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:42:41,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:42:41,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:42:41,219 INFO L87 Difference]: Start difference. First operand 396 states and 487 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:42:41,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:42:41,289 INFO L93 Difference]: Finished difference Result 360 states and 413 transitions. [2021-11-20 07:42:41,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:42:41,290 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-11-20 07:42:41,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:42:41,295 INFO L225 Difference]: With dead ends: 360 [2021-11-20 07:42:41,295 INFO L226 Difference]: Without dead ends: 360 [2021-11-20 07:42:41,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:42:41,299 INFO L933 BasicCegarLoop]: 343 mSDtfsCounter, 10 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1350 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:42:41,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1350 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:42:41,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-11-20 07:42:41,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 354. [2021-11-20 07:42:41,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 207 states have (on average 1.7777777777777777) internal successors, (368), 329 states have internal predecessors, (368), 16 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (19), 17 states have call predecessors, (19), 16 states have call successors, (19) [2021-11-20 07:42:41,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 403 transitions. [2021-11-20 07:42:41,322 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 403 transitions. Word has length 17 [2021-11-20 07:42:41,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:42:41,322 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 403 transitions. [2021-11-20 07:42:41,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:42:41,323 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 403 transitions. [2021-11-20 07:42:41,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 07:42:41,323 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:42:41,324 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:42:41,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-20 07:42:41,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:42:41,536 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr86ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:42:41,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:42:41,537 INFO L85 PathProgramCache]: Analyzing trace with hash -2106255897, now seen corresponding path program 1 times [2021-11-20 07:42:41,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:42:41,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1994816634] [2021-11-20 07:42:41,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:42:41,537 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:42:41,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:42:41,538 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:42:41,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-20 07:42:41,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:42:41,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 07:42:41,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:42:41,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:42:41,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:42:41,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:42:41,720 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:42:41,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1994816634] [2021-11-20 07:42:41,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1994816634] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:42:41,721 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:42:41,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-11-20 07:42:41,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295744921] [2021-11-20 07:42:41,722 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:42:41,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:42:41,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:42:41,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:42:41,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:42:41,728 INFO L87 Difference]: Start difference. First operand 354 states and 403 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:42:41,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:42:41,806 INFO L93 Difference]: Finished difference Result 353 states and 402 transitions. [2021-11-20 07:42:41,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:42:41,807 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-11-20 07:42:41,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:42:41,812 INFO L225 Difference]: With dead ends: 353 [2021-11-20 07:42:41,812 INFO L226 Difference]: Without dead ends: 353 [2021-11-20 07:42:41,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:42:41,817 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 256 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:42:41,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 1060 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:42:41,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-11-20 07:42:41,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2021-11-20 07:42:41,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 207 states have (on average 1.7729468599033817) internal successors, (367), 328 states have internal predecessors, (367), 16 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (19), 17 states have call predecessors, (19), 16 states have call successors, (19) [2021-11-20 07:42:41,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 402 transitions. [2021-11-20 07:42:41,836 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 402 transitions. Word has length 17 [2021-11-20 07:42:41,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:42:41,837 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 402 transitions. [2021-11-20 07:42:41,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:42:41,837 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 402 transitions. [2021-11-20 07:42:41,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 07:42:41,841 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:42:41,841 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:42:41,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-20 07:42:42,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:42:42,053 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:42:42,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:42:42,054 INFO L85 PathProgramCache]: Analyzing trace with hash -2106256148, now seen corresponding path program 1 times [2021-11-20 07:42:42,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:42:42,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1013775071] [2021-11-20 07:42:42,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:42:42,054 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:42:42,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:42:42,055 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:42:42,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-20 07:42:42,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:42:42,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:42:42,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:42:42,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:42:42,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:42:42,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:42:42,340 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:42:42,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1013775071] [2021-11-20 07:42:42,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1013775071] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:42:42,341 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:42:42,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-20 07:42:42,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018807334] [2021-11-20 07:42:42,342 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:42:42,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:42:42,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:42:42,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:42:42,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:42:42,345 INFO L87 Difference]: Start difference. First operand 353 states and 402 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 07:42:42,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:42:42,399 INFO L93 Difference]: Finished difference Result 397 states and 452 transitions. [2021-11-20 07:42:42,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:42:42,400 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-11-20 07:42:42,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:42:42,405 INFO L225 Difference]: With dead ends: 397 [2021-11-20 07:42:42,405 INFO L226 Difference]: Without dead ends: 397 [2021-11-20 07:42:42,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:42:42,406 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 40 mSDsluCounter, 1031 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1383 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:42:42,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 1383 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:42:42,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-11-20 07:42:42,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 355. [2021-11-20 07:42:42,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 209 states have (on average 1.7655502392344498) internal successors, (369), 329 states have internal predecessors, (369), 16 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2021-11-20 07:42:42,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 404 transitions. [2021-11-20 07:42:42,423 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 404 transitions. Word has length 17 [2021-11-20 07:42:42,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:42:42,423 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 404 transitions. [2021-11-20 07:42:42,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 07:42:42,423 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 404 transitions. [2021-11-20 07:42:42,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 07:42:42,429 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:42:42,430 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:42:42,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-20 07:42:42,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:42:42,641 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:42:42,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:42:42,641 INFO L85 PathProgramCache]: Analyzing trace with hash -2134885299, now seen corresponding path program 1 times [2021-11-20 07:42:42,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:42:42,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [642377794] [2021-11-20 07:42:42,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:42:42,642 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:42:42,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:42:42,643 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:42:42,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-20 07:42:42,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:42:42,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 07:42:42,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:42:42,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:42:42,870 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 07:42:42,870 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 [2021-11-20 07:42:42,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:42:42,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:42:55,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:42:55,783 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:42:55,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [642377794] [2021-11-20 07:42:55,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [642377794] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:42:55,783 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:42:55,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-20 07:42:55,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789904683] [2021-11-20 07:42:55,784 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:42:55,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 07:42:55,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:42:55,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 07:42:55,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=118, Unknown=6, NotChecked=0, Total=156 [2021-11-20 07:42:55,786 INFO L87 Difference]: Start difference. First operand 355 states and 404 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 07:42:55,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:42:55,843 INFO L93 Difference]: Finished difference Result 360 states and 414 transitions. [2021-11-20 07:42:55,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:42:55,844 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 17 [2021-11-20 07:42:55,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:42:55,847 INFO L225 Difference]: With dead ends: 360 [2021-11-20 07:42:55,847 INFO L226 Difference]: Without dead ends: 360 [2021-11-20 07:42:55,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=39, Invalid=137, Unknown=6, NotChecked=0, Total=182 [2021-11-20 07:42:55,848 INFO L933 BasicCegarLoop]: 354 mSDtfsCounter, 9 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1444 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 690 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:42:55,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 1444 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 690 Unchecked, 0.0s Time] [2021-11-20 07:42:55,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-11-20 07:42:55,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 356. [2021-11-20 07:42:55,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 210 states have (on average 1.7571428571428571) internal successors, (369), 330 states have internal predecessors, (369), 16 states have call successors, (16), 9 states have call predecessors, (16), 12 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2021-11-20 07:42:55,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 404 transitions. [2021-11-20 07:42:55,862 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 404 transitions. Word has length 17 [2021-11-20 07:42:55,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:42:55,863 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 404 transitions. [2021-11-20 07:42:55,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 07:42:55,863 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 404 transitions. [2021-11-20 07:42:55,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 07:42:55,864 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:42:55,864 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:42:55,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-20 07:42:56,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:42:56,077 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:42:56,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:42:56,077 INFO L85 PathProgramCache]: Analyzing trace with hash -2134885298, now seen corresponding path program 1 times [2021-11-20 07:42:56,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:42:56,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [354351782] [2021-11-20 07:42:56,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:42:56,078 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:42:56,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:42:56,079 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:42:56,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-20 07:42:56,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:42:56,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 07:42:56,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:42:56,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:42:56,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:42:58,509 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:42:58,510 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 30 treesize of output 32 [2021-11-20 07:42:58,523 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:42:58,523 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 24 [2021-11-20 07:42:58,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:42:58,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:43:12,896 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 28 treesize of output 26 [2021-11-20 07:43:12,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:43:12,998 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:43:12,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [354351782] [2021-11-20 07:43:12,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [354351782] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:43:12,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:43:12,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-11-20 07:43:12,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469065236] [2021-11-20 07:43:12,999 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:43:12,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 07:43:13,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:43:13,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 07:43:13,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=196, Unknown=6, NotChecked=0, Total=240 [2021-11-20 07:43:13,001 INFO L87 Difference]: Start difference. First operand 356 states and 404 transitions. Second operand has 16 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 07:43:20,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:43:20,918 INFO L93 Difference]: Finished difference Result 402 states and 456 transitions. [2021-11-20 07:43:20,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:43:20,920 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 17 [2021-11-20 07:43:20,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:43:20,923 INFO L225 Difference]: With dead ends: 402 [2021-11-20 07:43:20,923 INFO L226 Difference]: Without dead ends: 402 [2021-11-20 07:43:20,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=65, Invalid=307, Unknown=8, NotChecked=0, Total=380 [2021-11-20 07:43:20,925 INFO L933 BasicCegarLoop]: 326 mSDtfsCounter, 97 mSDsluCounter, 1540 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 1866 SdHoareTripleChecker+Invalid, 1416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1000 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:43:20,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 1866 Invalid, 1416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 402 Invalid, 0 Unknown, 1000 Unchecked, 1.6s Time] [2021-11-20 07:43:20,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-11-20 07:43:20,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 358. [2021-11-20 07:43:20,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 213 states have (on average 1.7464788732394365) internal successors, (372), 332 states have internal predecessors, (372), 16 states have call successors, (16), 9 states have call predecessors, (16), 12 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2021-11-20 07:43:20,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 407 transitions. [2021-11-20 07:43:20,940 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 407 transitions. Word has length 17 [2021-11-20 07:43:20,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:43:20,940 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 407 transitions. [2021-11-20 07:43:20,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 07:43:20,941 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 407 transitions. [2021-11-20 07:43:20,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 07:43:20,941 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:43:20,942 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:43:20,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-20 07:43:21,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:43:21,151 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr87ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:43:21,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:43:21,152 INFO L85 PathProgramCache]: Analyzing trace with hash -869422937, now seen corresponding path program 1 times [2021-11-20 07:43:21,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:43:21,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [949372619] [2021-11-20 07:43:21,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:43:21,152 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:43:21,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:43:21,154 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:43:21,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-20 07:43:21,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:43:21,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 07:43:21,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:43:21,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:43:21,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:43:21,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:43:21,598 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:43:21,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [949372619] [2021-11-20 07:43:21,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [949372619] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:43:21,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:43:21,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-11-20 07:43:21,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102285908] [2021-11-20 07:43:21,599 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:43:21,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 07:43:21,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:43:21,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 07:43:21,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:43:21,601 INFO L87 Difference]: Start difference. First operand 358 states and 407 transitions. Second operand has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:43:22,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:43:22,359 INFO L93 Difference]: Finished difference Result 363 states and 415 transitions. [2021-11-20 07:43:22,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:43:22,360 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 18 [2021-11-20 07:43:22,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:43:22,363 INFO L225 Difference]: With dead ends: 363 [2021-11-20 07:43:22,364 INFO L226 Difference]: Without dead ends: 363 [2021-11-20 07:43:22,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:43:22,365 INFO L933 BasicCegarLoop]: 306 mSDtfsCounter, 1072 mSDsluCounter, 967 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1086 SdHoareTripleChecker+Valid, 1273 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:43:22,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1086 Valid, 1273 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 294 Invalid, 0 Unknown, 41 Unchecked, 0.7s Time] [2021-11-20 07:43:22,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-11-20 07:43:22,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 357. [2021-11-20 07:43:22,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 213 states have (on average 1.7370892018779343) internal successors, (370), 331 states have internal predecessors, (370), 16 states have call successors, (16), 9 states have call predecessors, (16), 12 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2021-11-20 07:43:22,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 405 transitions. [2021-11-20 07:43:22,403 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 405 transitions. Word has length 18 [2021-11-20 07:43:22,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:43:22,404 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 405 transitions. [2021-11-20 07:43:22,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:43:22,404 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 405 transitions. [2021-11-20 07:43:22,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 07:43:22,406 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:43:22,406 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:43:22,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-20 07:43:22,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:43:22,618 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr103ASSERT_VIOLATIONMEMORY_LEAK === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:43:22,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:43:22,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1883109288, now seen corresponding path program 1 times [2021-11-20 07:43:22,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:43:22,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [912073135] [2021-11-20 07:43:22,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:43:22,620 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:43:22,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:43:22,621 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:43:22,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-20 07:43:22,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:43:22,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 07:43:22,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:43:22,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:43:22,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:43:22,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:43:22,848 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:43:22,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [912073135] [2021-11-20 07:43:22,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [912073135] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:43:22,848 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:43:22,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 07:43:22,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139648856] [2021-11-20 07:43:22,848 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:43:22,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:43:22,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:43:22,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:43:22,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:43:22,849 INFO L87 Difference]: Start difference. First operand 357 states and 405 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 07:43:23,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:43:23,658 INFO L93 Difference]: Finished difference Result 364 states and 416 transitions. [2021-11-20 07:43:23,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:43:23,659 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-11-20 07:43:23,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:43:23,662 INFO L225 Difference]: With dead ends: 364 [2021-11-20 07:43:23,662 INFO L226 Difference]: Without dead ends: 351 [2021-11-20 07:43:23,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:43:23,664 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 41 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:43:23,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 679 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 07:43:23,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-11-20 07:43:23,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 347. [2021-11-20 07:43:23,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 204 states have (on average 1.7647058823529411) internal successors, (360), 322 states have internal predecessors, (360), 16 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (18), 17 states have call predecessors, (18), 16 states have call successors, (18) [2021-11-20 07:43:23,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 394 transitions. [2021-11-20 07:43:23,677 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 394 transitions. Word has length 18 [2021-11-20 07:43:23,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:43:23,677 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 394 transitions. [2021-11-20 07:43:23,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 07:43:23,678 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 394 transitions. [2021-11-20 07:43:23,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 07:43:23,679 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:43:23,679 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:43:23,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-20 07:43:23,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:43:23,892 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr88ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:43:23,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:43:23,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1369850122, now seen corresponding path program 1 times [2021-11-20 07:43:23,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:43:23,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1062272769] [2021-11-20 07:43:23,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:43:23,892 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:43:23,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:43:23,893 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:43:23,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-20 07:43:23,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:43:23,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 07:43:23,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:43:24,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:43:24,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:43:24,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:43:24,078 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:43:24,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1062272769] [2021-11-20 07:43:24,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1062272769] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:43:24,078 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:43:24,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-20 07:43:24,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535001682] [2021-11-20 07:43:24,079 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:43:24,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:43:24,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:43:24,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:43:24,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:43:24,080 INFO L87 Difference]: Start difference. First operand 347 states and 394 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 07:43:24,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:43:24,153 INFO L93 Difference]: Finished difference Result 384 states and 436 transitions. [2021-11-20 07:43:24,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:43:24,154 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-11-20 07:43:24,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:43:24,157 INFO L225 Difference]: With dead ends: 384 [2021-11-20 07:43:24,157 INFO L226 Difference]: Without dead ends: 384 [2021-11-20 07:43:24,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:43:24,159 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 252 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 1238 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 [2021-11-20 07:43:24,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 1238 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:43:24,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-11-20 07:43:24,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 347. [2021-11-20 07:43:24,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 204 states have (on average 1.7598039215686274) internal successors, (359), 322 states have internal predecessors, (359), 16 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (18), 17 states have call predecessors, (18), 16 states have call successors, (18) [2021-11-20 07:43:24,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 393 transitions. [2021-11-20 07:43:24,175 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 393 transitions. Word has length 19 [2021-11-20 07:43:24,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:43:24,176 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 393 transitions. [2021-11-20 07:43:24,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 07:43:24,176 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 393 transitions. [2021-11-20 07:43:24,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 07:43:24,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:43:24,177 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:43:24,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-20 07:43:24,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:43:24,389 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:43:24,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:43:24,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1969475052, now seen corresponding path program 1 times [2021-11-20 07:43:24,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:43:24,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [437263530] [2021-11-20 07:43:24,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:43:24,390 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:43:24,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:43:24,393 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:43:24,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-20 07:43:24,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:43:24,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 07:43:24,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:43:24,588 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 07:43:24,588 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 21 treesize of output 28 [2021-11-20 07:43:24,909 INFO L354 Elim1Store]: treesize reduction 20, result has 28.6 percent of original size [2021-11-20 07:43:24,909 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 39 treesize of output 42 [2021-11-20 07:43:25,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:43:25,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:43:25,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:43:25,353 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:43:25,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [437263530] [2021-11-20 07:43:25,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [437263530] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:43:25,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:43:25,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 11 [2021-11-20 07:43:25,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066562973] [2021-11-20 07:43:25,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:43:25,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 07:43:25,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:43:25,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 07:43:25,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:43:25,355 INFO L87 Difference]: Start difference. First operand 347 states and 393 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 10 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:43:26,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:43:26,535 INFO L93 Difference]: Finished difference Result 349 states and 396 transitions. [2021-11-20 07:43:26,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:43:26,536 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 10 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 21 [2021-11-20 07:43:26,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:43:26,538 INFO L225 Difference]: With dead ends: 349 [2021-11-20 07:43:26,538 INFO L226 Difference]: Without dead ends: 349 [2021-11-20 07:43:26,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:43:26,539 INFO L933 BasicCegarLoop]: 330 mSDtfsCounter, 15 mSDsluCounter, 1186 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1516 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 285 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:43:26,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 1516 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 429 Invalid, 0 Unknown, 285 Unchecked, 1.1s Time] [2021-11-20 07:43:26,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-11-20 07:43:26,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2021-11-20 07:43:26,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 206 states have (on average 1.7572815533980584) internal successors, (362), 324 states have internal predecessors, (362), 16 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (18), 17 states have call predecessors, (18), 16 states have call successors, (18) [2021-11-20 07:43:26,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 396 transitions. [2021-11-20 07:43:26,551 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 396 transitions. Word has length 21 [2021-11-20 07:43:26,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:43:26,552 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 396 transitions. [2021-11-20 07:43:26,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 10 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:43:26,552 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 396 transitions. [2021-11-20 07:43:26,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 07:43:26,553 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:43:26,553 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:43:26,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-20 07:43:26,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:43:26,765 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr90REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:43:26,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:43:26,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1969475053, now seen corresponding path program 1 times [2021-11-20 07:43:26,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:43:26,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [558296249] [2021-11-20 07:43:26,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:43:26,766 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:43:26,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:43:26,768 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:43:26,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-20 07:43:26,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:43:26,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 07:43:26,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:43:29,037 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:43:29,037 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 27 treesize of output 29 [2021-11-20 07:43:31,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:43:31,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:43:48,394 WARN L227 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:43:48,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:43:48,536 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:43:48,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [558296249] [2021-11-20 07:43:48,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [558296249] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:43:48,537 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:43:48,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-11-20 07:43:48,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951682780] [2021-11-20 07:43:48,537 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:43:48,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 07:43:48,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:43:48,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 07:43:48,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=89, Unknown=5, NotChecked=0, Total=132 [2021-11-20 07:43:48,539 INFO L87 Difference]: Start difference. First operand 349 states and 396 transitions. Second operand has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:43:51,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:43:51,417 INFO L93 Difference]: Finished difference Result 351 states and 402 transitions. [2021-11-20 07:43:51,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:43:51,419 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 21 [2021-11-20 07:43:51,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:43:51,422 INFO L225 Difference]: With dead ends: 351 [2021-11-20 07:43:51,422 INFO L226 Difference]: Without dead ends: 351 [2021-11-20 07:43:51,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=54, Invalid=122, Unknown=6, NotChecked=0, Total=182 [2021-11-20 07:43:51,423 INFO L933 BasicCegarLoop]: 306 mSDtfsCounter, 100 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 304 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:43:51,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 791 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 117 Invalid, 0 Unknown, 304 Unchecked, 0.8s Time] [2021-11-20 07:43:51,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-11-20 07:43:51,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 349. [2021-11-20 07:43:51,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 206 states have (on average 1.7524271844660195) internal successors, (361), 324 states have internal predecessors, (361), 16 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (18), 17 states have call predecessors, (18), 16 states have call successors, (18) [2021-11-20 07:43:51,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 395 transitions. [2021-11-20 07:43:51,435 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 395 transitions. Word has length 21 [2021-11-20 07:43:51,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:43:51,435 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 395 transitions. [2021-11-20 07:43:51,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:43:51,436 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 395 transitions. [2021-11-20 07:43:51,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-20 07:43:51,437 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:43:51,437 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:43:51,452 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-20 07:43:51,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:43:51,649 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr91REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:43:51,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:43:51,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1415040467, now seen corresponding path program 1 times [2021-11-20 07:43:51,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:43:51,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1770908935] [2021-11-20 07:43:51,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:43:51,650 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:43:51,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:43:51,651 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:43:51,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-20 07:43:51,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:43:51,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 07:43:51,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:43:51,816 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 23 treesize of output 15 [2021-11-20 07:43:51,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:43:51,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:43:51,874 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-11-20 07:43:51,874 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 [2021-11-20 07:43:51,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:43:51,945 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:43:51,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1770908935] [2021-11-20 07:43:51,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1770908935] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:43:51,946 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:43:51,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 4 [2021-11-20 07:43:51,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058093698] [2021-11-20 07:43:51,947 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:43:51,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:43:51,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:43:51,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:43:51,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:43:51,948 INFO L87 Difference]: Start difference. First operand 349 states and 395 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:43:52,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:43:52,821 INFO L93 Difference]: Finished difference Result 389 states and 436 transitions. [2021-11-20 07:43:52,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:43:52,823 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 23 [2021-11-20 07:43:52,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:43:52,826 INFO L225 Difference]: With dead ends: 389 [2021-11-20 07:43:52,826 INFO L226 Difference]: Without dead ends: 389 [2021-11-20 07:43:52,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:43:52,827 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 57 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 1034 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:43:52,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 1034 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 07:43:52,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-11-20 07:43:52,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 351. [2021-11-20 07:43:52,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 208 states have (on average 1.75) internal successors, (364), 326 states have internal predecessors, (364), 16 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (18), 17 states have call predecessors, (18), 16 states have call successors, (18) [2021-11-20 07:43:52,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 398 transitions. [2021-11-20 07:43:52,841 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 398 transitions. Word has length 23 [2021-11-20 07:43:52,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:43:52,841 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 398 transitions. [2021-11-20 07:43:52,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:43:52,842 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 398 transitions. [2021-11-20 07:43:52,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-20 07:43:52,843 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:43:52,843 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:43:52,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-20 07:43:53,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:43:53,055 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr92REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:43:53,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:43:53,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1415040466, now seen corresponding path program 1 times [2021-11-20 07:43:53,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:43:53,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1219577002] [2021-11-20 07:43:53,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:43:53,056 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:43:53,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:43:53,057 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:43:53,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-20 07:43:53,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:43:53,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 07:43:53,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:43:53,409 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 26 [2021-11-20 07:43:53,412 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 23 treesize of output 15 [2021-11-20 07:43:53,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:43:53,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:43:53,604 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:43:53,604 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 42 [2021-11-20 07:43:54,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:43:54,052 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:43:54,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1219577002] [2021-11-20 07:43:54,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1219577002] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:43:54,052 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:43:54,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 7 [2021-11-20 07:43:54,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364069065] [2021-11-20 07:43:54,053 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:43:54,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:43:54,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:43:54,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:43:54,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:43:54,055 INFO L87 Difference]: Start difference. First operand 351 states and 398 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 07:43:56,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:43:56,179 INFO L93 Difference]: Finished difference Result 396 states and 444 transitions. [2021-11-20 07:43:56,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:43:56,181 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 23 [2021-11-20 07:43:56,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:43:56,183 INFO L225 Difference]: With dead ends: 396 [2021-11-20 07:43:56,183 INFO L226 Difference]: Without dead ends: 396 [2021-11-20 07:43:56,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:43:56,184 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 103 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:43:56,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 1094 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-20 07:43:56,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-11-20 07:43:56,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 351. [2021-11-20 07:43:56,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 208 states have (on average 1.7451923076923077) internal successors, (363), 326 states have internal predecessors, (363), 16 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (18), 17 states have call predecessors, (18), 16 states have call successors, (18) [2021-11-20 07:43:56,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 397 transitions. [2021-11-20 07:43:56,197 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 397 transitions. Word has length 23 [2021-11-20 07:43:56,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:43:56,197 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 397 transitions. [2021-11-20 07:43:56,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 07:43:56,198 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 397 transitions. [2021-11-20 07:43:56,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 07:43:56,198 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:43:56,199 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:43:56,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-20 07:43:56,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:43:56,411 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr83ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:43:56,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:43:56,411 INFO L85 PathProgramCache]: Analyzing trace with hash -412937067, now seen corresponding path program 1 times [2021-11-20 07:43:56,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:43:56,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1613461738] [2021-11-20 07:43:56,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:43:56,412 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:43:56,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:43:56,413 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:43:56,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-20 07:43:56,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:43:56,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 07:43:56,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:43:56,551 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:43:56,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:43:56,631 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:43:56,631 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:43:56,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1613461738] [2021-11-20 07:43:56,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1613461738] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:43:56,631 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:43:56,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-11-20 07:43:56,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144899878] [2021-11-20 07:43:56,632 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:43:56,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:43:56,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:43:56,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:43:56,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:43:56,633 INFO L87 Difference]: Start difference. First operand 351 states and 397 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:43:56,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:43:56,674 INFO L93 Difference]: Finished difference Result 350 states and 396 transitions. [2021-11-20 07:43:56,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:43:56,683 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2021-11-20 07:43:56,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:43:56,686 INFO L225 Difference]: With dead ends: 350 [2021-11-20 07:43:56,686 INFO L226 Difference]: Without dead ends: 350 [2021-11-20 07:43:56,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:43:56,687 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 248 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 1063 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:43:56,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 1063 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:43:56,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-11-20 07:43:56,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 350. [2021-11-20 07:43:56,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 208 states have (on average 1.7403846153846154) internal successors, (362), 325 states have internal predecessors, (362), 16 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (18), 17 states have call predecessors, (18), 16 states have call successors, (18) [2021-11-20 07:43:56,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 396 transitions. [2021-11-20 07:43:56,699 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 396 transitions. Word has length 25 [2021-11-20 07:43:56,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:43:56,699 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 396 transitions. [2021-11-20 07:43:56,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:43:56,700 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 396 transitions. [2021-11-20 07:43:56,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 07:43:56,700 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:43:56,701 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:43:56,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-20 07:43:56,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:43:56,913 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:43:56,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:43:56,913 INFO L85 PathProgramCache]: Analyzing trace with hash -412937301, now seen corresponding path program 1 times [2021-11-20 07:43:56,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:43:56,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [45214704] [2021-11-20 07:43:56,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:43:56,914 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:43:56,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:43:56,915 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:43:56,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-20 07:43:56,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:43:56,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:43:56,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:43:57,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:43:57,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:43:57,163 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:43:57,163 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:43:57,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [45214704] [2021-11-20 07:43:57,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [45214704] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:43:57,164 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:43:57,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-20 07:43:57,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037111975] [2021-11-20 07:43:57,164 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:43:57,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:43:57,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:43:57,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:43:57,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:43:57,165 INFO L87 Difference]: Start difference. First operand 350 states and 396 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:43:57,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:43:57,208 INFO L93 Difference]: Finished difference Result 398 states and 450 transitions. [2021-11-20 07:43:57,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:43:57,216 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2021-11-20 07:43:57,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:43:57,219 INFO L225 Difference]: With dead ends: 398 [2021-11-20 07:43:57,219 INFO L226 Difference]: Without dead ends: 398 [2021-11-20 07:43:57,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:43:57,220 INFO L933 BasicCegarLoop]: 373 mSDtfsCounter, 44 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 1445 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:43:57,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 1445 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:43:57,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-11-20 07:43:57,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 354. [2021-11-20 07:43:57,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 211 states have (on average 1.7298578199052133) internal successors, (365), 328 states have internal predecessors, (365), 16 states have call successors, (16), 9 states have call predecessors, (16), 12 states have return successors, (24), 18 states have call predecessors, (24), 16 states have call successors, (24) [2021-11-20 07:43:57,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 405 transitions. [2021-11-20 07:43:57,233 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 405 transitions. Word has length 25 [2021-11-20 07:43:57,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:43:57,234 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 405 transitions. [2021-11-20 07:43:57,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:43:57,234 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 405 transitions. [2021-11-20 07:43:57,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 07:43:57,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:43:57,235 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:43:57,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-20 07:43:57,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:43:57,447 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:43:57,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:43:57,448 INFO L85 PathProgramCache]: Analyzing trace with hash -441566452, now seen corresponding path program 1 times [2021-11-20 07:43:57,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:43:57,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1107885984] [2021-11-20 07:43:57,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:43:57,449 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:43:57,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:43:57,449 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:43:57,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-20 07:43:57,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:43:57,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:43:57,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:43:57,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:43:57,665 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-20 07:43:57,665 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 15 treesize of output 20 [2021-11-20 07:43:57,705 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:43:57,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:43:57,969 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:43:57,969 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:43:57,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1107885984] [2021-11-20 07:43:57,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1107885984] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:43:57,970 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:43:57,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-11-20 07:43:57,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586577981] [2021-11-20 07:43:57,970 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:43:57,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:43:57,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:43:57,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:43:57,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:43:57,972 INFO L87 Difference]: Start difference. First operand 354 states and 405 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 07:43:59,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:43:59,566 INFO L93 Difference]: Finished difference Result 498 states and 575 transitions. [2021-11-20 07:43:59,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:43:59,567 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2021-11-20 07:43:59,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:43:59,570 INFO L225 Difference]: With dead ends: 498 [2021-11-20 07:43:59,570 INFO L226 Difference]: Without dead ends: 498 [2021-11-20 07:43:59,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:43:59,571 INFO L933 BasicCegarLoop]: 263 mSDtfsCounter, 182 mSDsluCounter, 1025 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 1288 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 275 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:43:59,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 1288 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 727 Invalid, 0 Unknown, 275 Unchecked, 1.5s Time] [2021-11-20 07:43:59,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-11-20 07:43:59,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 356. [2021-11-20 07:43:59,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 214 states have (on average 1.719626168224299) internal successors, (368), 330 states have internal predecessors, (368), 16 states have call successors, (16), 9 states have call predecessors, (16), 12 states have return successors, (24), 18 states have call predecessors, (24), 16 states have call successors, (24) [2021-11-20 07:43:59,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 408 transitions. [2021-11-20 07:43:59,585 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 408 transitions. Word has length 25 [2021-11-20 07:43:59,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:43:59,585 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 408 transitions. [2021-11-20 07:43:59,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 07:43:59,585 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 408 transitions. [2021-11-20 07:43:59,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 07:43:59,586 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:43:59,586 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:43:59,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-20 07:43:59,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:43:59,800 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:43:59,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:43:59,800 INFO L85 PathProgramCache]: Analyzing trace with hash -441566451, now seen corresponding path program 1 times [2021-11-20 07:43:59,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:43:59,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1117152654] [2021-11-20 07:43:59,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:43:59,801 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:43:59,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:43:59,802 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:43:59,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-20 07:43:59,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:43:59,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 07:43:59,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:43:59,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:44:04,135 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:44:04,135 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 14 [2021-11-20 07:44:04,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:44:04,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:44:06,487 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:44:06,487 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:44:06,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1117152654] [2021-11-20 07:44:06,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1117152654] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:44:06,488 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:44:06,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-11-20 07:44:06,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419387658] [2021-11-20 07:44:06,489 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:44:06,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 07:44:06,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:44:06,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 07:44:06,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=195, Unknown=2, NotChecked=0, Total=240 [2021-11-20 07:44:06,491 INFO L87 Difference]: Start difference. First operand 356 states and 408 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:44:08,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:44:08,313 INFO L93 Difference]: Finished difference Result 402 states and 453 transitions. [2021-11-20 07:44:08,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:44:08,314 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 25 [2021-11-20 07:44:08,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:44:08,317 INFO L225 Difference]: With dead ends: 402 [2021-11-20 07:44:08,317 INFO L226 Difference]: Without dead ends: 402 [2021-11-20 07:44:08,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=59, Invalid=245, Unknown=2, NotChecked=0, Total=306 [2021-11-20 07:44:08,320 INFO L933 BasicCegarLoop]: 345 mSDtfsCounter, 59 mSDsluCounter, 2817 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 3162 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 703 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:44:08,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 3162 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 652 Invalid, 0 Unknown, 703 Unchecked, 1.6s Time] [2021-11-20 07:44:08,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-11-20 07:44:08,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 359. [2021-11-20 07:44:08,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 217 states have (on average 1.7096774193548387) internal successors, (371), 332 states have internal predecessors, (371), 16 states have call successors, (16), 10 states have call predecessors, (16), 13 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2021-11-20 07:44:08,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 406 transitions. [2021-11-20 07:44:08,333 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 406 transitions. Word has length 25 [2021-11-20 07:44:08,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:44:08,333 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 406 transitions. [2021-11-20 07:44:08,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:44:08,334 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 406 transitions. [2021-11-20 07:44:08,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 07:44:08,334 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:44:08,334 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:44:08,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-20 07:44:08,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:44:08,547 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr84ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:44:08,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:44:08,548 INFO L85 PathProgramCache]: Analyzing trace with hash 83853234, now seen corresponding path program 1 times [2021-11-20 07:44:08,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:44:08,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1772479014] [2021-11-20 07:44:08,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:44:08,549 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:44:08,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:44:08,550 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:44:08,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-20 07:44:08,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:44:08,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:44:08,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:44:09,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:44:09,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:44:09,300 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:44:09,300 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:44:09,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1772479014] [2021-11-20 07:44:09,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1772479014] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:44:09,300 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:44:09,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-11-20 07:44:09,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750452241] [2021-11-20 07:44:09,301 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:44:09,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 07:44:09,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:44:09,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 07:44:09,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:44:09,302 INFO L87 Difference]: Start difference. First operand 359 states and 406 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 07:44:09,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:44:09,642 INFO L93 Difference]: Finished difference Result 589 states and 670 transitions. [2021-11-20 07:44:09,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:44:09,645 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 26 [2021-11-20 07:44:09,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:44:09,648 INFO L225 Difference]: With dead ends: 589 [2021-11-20 07:44:09,648 INFO L226 Difference]: Without dead ends: 589 [2021-11-20 07:44:09,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:44:09,649 INFO L933 BasicCegarLoop]: 531 mSDtfsCounter, 319 mSDsluCounter, 1758 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 2289 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:44:09,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 2289 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 175 Invalid, 0 Unknown, 87 Unchecked, 0.3s Time] [2021-11-20 07:44:09,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-11-20 07:44:09,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 456. [2021-11-20 07:44:09,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 301 states have (on average 1.7541528239202657) internal successors, (528), 416 states have internal predecessors, (528), 26 states have call successors, (26), 15 states have call predecessors, (26), 19 states have return successors, (39), 28 states have call predecessors, (39), 26 states have call successors, (39) [2021-11-20 07:44:09,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 593 transitions. [2021-11-20 07:44:09,680 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 593 transitions. Word has length 26 [2021-11-20 07:44:09,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:44:09,681 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 593 transitions. [2021-11-20 07:44:09,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 07:44:09,681 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 593 transitions. [2021-11-20 07:44:09,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 07:44:09,682 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:44:09,682 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:44:09,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-20 07:44:09,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:44:09,894 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr93REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:44:09,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:44:09,895 INFO L85 PathProgramCache]: Analyzing trace with hash -366162574, now seen corresponding path program 1 times [2021-11-20 07:44:09,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:44:09,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1537726781] [2021-11-20 07:44:09,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:44:09,896 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:44:09,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:44:09,897 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:44:09,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-20 07:44:09,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:44:09,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 07:44:09,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:44:10,328 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 [2021-11-20 07:44:10,336 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 [2021-11-20 07:44:10,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:44:10,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:44:10,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:44:10,729 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:44:10,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1537726781] [2021-11-20 07:44:10,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1537726781] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:44:10,729 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:44:10,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 8 [2021-11-20 07:44:10,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982817272] [2021-11-20 07:44:10,730 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:44:10,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:44:10,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:44:10,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:44:10,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:44:10,731 INFO L87 Difference]: Start difference. First operand 456 states and 593 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 07:44:11,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:44:11,239 INFO L93 Difference]: Finished difference Result 462 states and 598 transitions. [2021-11-20 07:44:11,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:44:11,240 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2021-11-20 07:44:11,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:44:11,245 INFO L225 Difference]: With dead ends: 462 [2021-11-20 07:44:11,245 INFO L226 Difference]: Without dead ends: 462 [2021-11-20 07:44:11,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:44:11,246 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 27 mSDsluCounter, 1234 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 1566 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:44:11,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 1566 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 07:44:11,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-20 07:44:11,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 458. [2021-11-20 07:44:11,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 303 states have (on average 1.7491749174917492) internal successors, (530), 418 states have internal predecessors, (530), 26 states have call successors, (26), 15 states have call predecessors, (26), 19 states have return successors, (39), 28 states have call predecessors, (39), 26 states have call successors, (39) [2021-11-20 07:44:11,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 595 transitions. [2021-11-20 07:44:11,265 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 595 transitions. Word has length 26 [2021-11-20 07:44:11,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:44:11,265 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 595 transitions. [2021-11-20 07:44:11,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 07:44:11,266 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 595 transitions. [2021-11-20 07:44:11,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 07:44:11,266 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:44:11,266 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:44:11,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-20 07:44:11,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:44:11,480 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr103ASSERT_VIOLATIONMEMORY_LEAK === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:44:11,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:44:11,480 INFO L85 PathProgramCache]: Analyzing trace with hash 305064464, now seen corresponding path program 1 times [2021-11-20 07:44:11,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:44:11,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [588968834] [2021-11-20 07:44:11,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:44:11,481 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:44:11,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:44:11,482 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:44:11,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-20 07:44:11,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:44:11,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 07:44:11,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:44:11,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:44:11,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:44:16,200 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_6| (Array (_ BitVec 32) (_ BitVec 1)))) (or (exists ((|v_ULTIMATE.start_entry_point_#t~ret65#1.base_80| (_ BitVec 32))) (and (not (= |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_6| (store |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret65#1.base_80| (_ bv0 1)))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret65#1.base_80|)))))) (= (store |c_#valid| |c_ldv_malloc_#res.base| (_ bv0 1)) |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_6|))) is different from false [2021-11-20 07:44:16,318 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_6| (Array (_ BitVec 32) (_ BitVec 1))) (|v_ldv_malloc_#res.base_171| (_ BitVec 32))) (or (= |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_6| (store |c_#valid| |v_ldv_malloc_#res.base_171| (_ bv0 1))) (not (= (_ bv0 1) (select |c_#valid| |v_ldv_malloc_#res.base_171|))) (exists ((|v_ULTIMATE.start_entry_point_#t~ret65#1.base_80| (_ BitVec 32))) (and (not (= |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_6| (store |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret65#1.base_80| (_ bv0 1)))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret65#1.base_80|)))))))) is different from false [2021-11-20 07:44:16,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-11-20 07:44:16,401 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:44:16,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [588968834] [2021-11-20 07:44:16,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [588968834] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:44:16,402 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:44:16,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-11-20 07:44:16,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919389785] [2021-11-20 07:44:16,403 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:44:16,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 07:44:16,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:44:16,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 07:44:16,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=86, Unknown=4, NotChecked=38, Total=156 [2021-11-20 07:44:16,404 INFO L87 Difference]: Start difference. First operand 458 states and 595 transitions. Second operand has 13 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:44:18,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:44:18,784 INFO L93 Difference]: Finished difference Result 465 states and 600 transitions. [2021-11-20 07:44:18,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:44:18,786 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 28 [2021-11-20 07:44:18,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:44:18,788 INFO L225 Difference]: With dead ends: 465 [2021-11-20 07:44:18,788 INFO L226 Difference]: Without dead ends: 449 [2021-11-20 07:44:18,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=34, Invalid=102, Unknown=4, NotChecked=42, Total=182 [2021-11-20 07:44:18,789 INFO L933 BasicCegarLoop]: 318 mSDtfsCounter, 48 mSDsluCounter, 1572 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1890 SdHoareTripleChecker+Invalid, 1496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 539 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:44:18,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 1890 Invalid, 1496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 943 Invalid, 0 Unknown, 539 Unchecked, 2.3s Time] [2021-11-20 07:44:18,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-11-20 07:44:18,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 447. [2021-11-20 07:44:18,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 292 states have (on average 1.773972602739726) internal successors, (518), 408 states have internal predecessors, (518), 26 states have call successors, (26), 15 states have call predecessors, (26), 19 states have return successors, (38), 27 states have call predecessors, (38), 26 states have call successors, (38) [2021-11-20 07:44:18,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 582 transitions. [2021-11-20 07:44:18,805 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 582 transitions. Word has length 28 [2021-11-20 07:44:18,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:44:18,806 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 582 transitions. [2021-11-20 07:44:18,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:44:18,806 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 582 transitions. [2021-11-20 07:44:18,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 07:44:18,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:44:18,807 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:44:18,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-20 07:44:19,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:44:19,027 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr88ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:44:19,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:44:19,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1975256279, now seen corresponding path program 1 times [2021-11-20 07:44:19,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:44:19,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [864084492] [2021-11-20 07:44:19,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:44:19,028 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:44:19,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:44:19,029 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:44:19,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-20 07:44:19,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:44:19,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 07:44:19,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:44:19,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:44:19,266 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 07:44:19,267 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 [2021-11-20 07:44:19,536 INFO L354 Elim1Store]: treesize reduction 20, result has 28.6 percent of original size [2021-11-20 07:44:19,537 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 30 treesize of output 33 [2021-11-20 07:44:19,608 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:44:19,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:44:22,093 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:44:22,093 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:44:22,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [864084492] [2021-11-20 07:44:22,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [864084492] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:44:22,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:44:22,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-11-20 07:44:22,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228479042] [2021-11-20 07:44:22,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:44:22,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 07:44:22,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:44:22,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 07:44:22,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=170, Unknown=1, NotChecked=0, Total=210 [2021-11-20 07:44:22,096 INFO L87 Difference]: Start difference. First operand 447 states and 582 transitions. Second operand has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-20 07:44:30,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:44:30,002 INFO L93 Difference]: Finished difference Result 506 states and 644 transitions. [2021-11-20 07:44:30,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 07:44:30,003 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 30 [2021-11-20 07:44:30,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:44:30,006 INFO L225 Difference]: With dead ends: 506 [2021-11-20 07:44:30,006 INFO L226 Difference]: Without dead ends: 506 [2021-11-20 07:44:30,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=49, Invalid=221, Unknown=2, NotChecked=0, Total=272 [2021-11-20 07:44:30,007 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 126 mSDsluCounter, 1733 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 2026 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 527 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:44:30,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 2026 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 865 Invalid, 0 Unknown, 527 Unchecked, 1.8s Time] [2021-11-20 07:44:30,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-11-20 07:44:30,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 450. [2021-11-20 07:44:30,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 295 states have (on average 1.7661016949152541) internal successors, (521), 411 states have internal predecessors, (521), 26 states have call successors, (26), 15 states have call predecessors, (26), 19 states have return successors, (38), 27 states have call predecessors, (38), 26 states have call successors, (38) [2021-11-20 07:44:30,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 585 transitions. [2021-11-20 07:44:30,037 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 585 transitions. Word has length 30 [2021-11-20 07:44:30,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:44:30,037 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 585 transitions. [2021-11-20 07:44:30,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-20 07:44:30,038 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 585 transitions. [2021-11-20 07:44:30,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 07:44:30,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:44:30,039 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-20 07:44:30,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-20 07:44:30,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:44:30,251 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:44:30,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:44:30,252 INFO L85 PathProgramCache]: Analyzing trace with hash -154246822, now seen corresponding path program 1 times [2021-11-20 07:44:30,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:44:30,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [230041553] [2021-11-20 07:44:30,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:44:30,253 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:44:30,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:44:30,254 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:44:30,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-20 07:44:30,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:44:30,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 07:44:30,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:44:30,512 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 07:44:30,513 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 19 treesize of output 26 [2021-11-20 07:44:30,686 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-11-20 07:44:30,686 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 30 treesize of output 47 [2021-11-20 07:44:31,226 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-11-20 07:44:31,227 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 52 [2021-11-20 07:44:31,429 INFO L354 Elim1Store]: treesize reduction 42, result has 33.3 percent of original size [2021-11-20 07:44:31,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 49 [2021-11-20 07:44:31,554 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:44:31,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:45:38,447 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 8 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:45:38,448 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:45:38,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [230041553] [2021-11-20 07:45:38,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [230041553] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:45:38,448 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:45:38,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 21 [2021-11-20 07:45:38,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223740371] [2021-11-20 07:45:38,448 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:45:38,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 07:45:38,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:45:38,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 07:45:38,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=345, Unknown=29, NotChecked=0, Total=506 [2021-11-20 07:45:38,450 INFO L87 Difference]: Start difference. First operand 450 states and 585 transitions. Second operand has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 18 states have internal predecessors, (48), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:45:47,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:45:47,750 INFO L93 Difference]: Finished difference Result 452 states and 588 transitions. [2021-11-20 07:45:47,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:45:47,752 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 18 states have internal predecessors, (48), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 32 [2021-11-20 07:45:47,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:45:47,755 INFO L225 Difference]: With dead ends: 452 [2021-11-20 07:45:47,756 INFO L226 Difference]: Without dead ends: 452 [2021-11-20 07:45:47,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 74.8s TimeCoverageRelationStatistics Valid=144, Invalid=377, Unknown=31, NotChecked=0, Total=552 [2021-11-20 07:45:47,757 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 24 mSDsluCounter, 1517 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1837 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 665 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:45:47,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 1837 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 418 Invalid, 0 Unknown, 665 Unchecked, 1.0s Time] [2021-11-20 07:45:47,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-11-20 07:45:47,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 452. [2021-11-20 07:45:47,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 297 states have (on average 1.7643097643097643) internal successors, (524), 413 states have internal predecessors, (524), 26 states have call successors, (26), 15 states have call predecessors, (26), 19 states have return successors, (38), 27 states have call predecessors, (38), 26 states have call successors, (38) [2021-11-20 07:45:47,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 588 transitions. [2021-11-20 07:45:47,774 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 588 transitions. Word has length 32 [2021-11-20 07:45:47,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:45:47,774 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 588 transitions. [2021-11-20 07:45:47,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 18 states have internal predecessors, (48), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:45:47,775 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 588 transitions. [2021-11-20 07:45:47,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 07:45:47,776 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:45:47,776 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-20 07:45:47,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-20 07:45:47,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:45:47,990 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr90REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:45:47,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:45:47,990 INFO L85 PathProgramCache]: Analyzing trace with hash -154246821, now seen corresponding path program 1 times [2021-11-20 07:45:47,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:45:47,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [481489479] [2021-11-20 07:45:47,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:45:47,991 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:45:47,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:45:47,992 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:45:47,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-20 07:45:48,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:45:48,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 07:45:48,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:45:50,275 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:45:50,275 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 33 treesize of output 35 [2021-11-20 07:46:00,538 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:46:00,539 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 [2021-11-20 07:46:01,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 4 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:46:01,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:46:29,116 WARN L227 SmtUtils]: Spent 7.15s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:46:40,287 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:46:40,287 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:46:40,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [481489479] [2021-11-20 07:46:40,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [481489479] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:46:40,288 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:46:40,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-11-20 07:46:40,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27261254] [2021-11-20 07:46:40,288 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:46:40,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:46:40,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:46:40,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:46:40,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=216, Unknown=18, NotChecked=0, Total=306 [2021-11-20 07:46:40,290 INFO L87 Difference]: Start difference. First operand 452 states and 588 transitions. Second operand has 18 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:46:54,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:46:54,112 INFO L93 Difference]: Finished difference Result 460 states and 596 transitions. [2021-11-20 07:46:54,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 07:46:54,114 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) Word has length 32 [2021-11-20 07:46:54,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:46:54,116 INFO L225 Difference]: With dead ends: 460 [2021-11-20 07:46:54,116 INFO L226 Difference]: Without dead ends: 460 [2021-11-20 07:46:54,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 62.3s TimeCoverageRelationStatistics Valid=108, Invalid=331, Unknown=23, NotChecked=0, Total=462 [2021-11-20 07:46:54,117 INFO L933 BasicCegarLoop]: 310 mSDtfsCounter, 102 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1586 SdHoareTripleChecker+Invalid, 1407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 887 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:46:54,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 1586 Invalid, 1407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 503 Invalid, 0 Unknown, 887 Unchecked, 2.1s Time] [2021-11-20 07:46:54,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-20 07:46:54,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 460. [2021-11-20 07:46:54,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 305 states have (on average 1.7442622950819673) internal successors, (532), 421 states have internal predecessors, (532), 26 states have call successors, (26), 15 states have call predecessors, (26), 19 states have return successors, (38), 27 states have call predecessors, (38), 26 states have call successors, (38) [2021-11-20 07:46:54,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 596 transitions. [2021-11-20 07:46:54,130 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 596 transitions. Word has length 32 [2021-11-20 07:46:54,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:46:54,130 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 596 transitions. [2021-11-20 07:46:54,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:46:54,131 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 596 transitions. [2021-11-20 07:46:54,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 07:46:54,131 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:46:54,131 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:46:54,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-20 07:46:54,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:46:54,343 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr90REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:46:54,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:46:54,343 INFO L85 PathProgramCache]: Analyzing trace with hash 139156186, now seen corresponding path program 1 times [2021-11-20 07:46:54,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:46:54,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [342240894] [2021-11-20 07:46:54,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:46:54,344 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:46:54,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:46:54,345 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:46:54,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-20 07:46:54,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:46:54,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 07:46:54,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:46:54,487 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:46:54,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:46:54,563 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:46:54,564 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:46:54,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [342240894] [2021-11-20 07:46:54,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [342240894] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:46:54,564 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:46:54,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-20 07:46:54,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667885700] [2021-11-20 07:46:54,565 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:46:54,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:46:54,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:46:54,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:46:54,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:46:54,566 INFO L87 Difference]: Start difference. First operand 460 states and 596 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:46:54,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:46:54,614 INFO L93 Difference]: Finished difference Result 483 states and 618 transitions. [2021-11-20 07:46:54,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:46:54,615 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2021-11-20 07:46:54,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:46:54,617 INFO L225 Difference]: With dead ends: 483 [2021-11-20 07:46:54,618 INFO L226 Difference]: Without dead ends: 483 [2021-11-20 07:46:54,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:46:54,619 INFO L933 BasicCegarLoop]: 376 mSDtfsCounter, 245 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:46:54,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 1240 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:46:54,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-11-20 07:46:54,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 452. [2021-11-20 07:46:54,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 297 states have (on average 1.7575757575757576) internal successors, (522), 413 states have internal predecessors, (522), 26 states have call successors, (26), 15 states have call predecessors, (26), 19 states have return successors, (38), 27 states have call predecessors, (38), 26 states have call successors, (38) [2021-11-20 07:46:54,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 586 transitions. [2021-11-20 07:46:54,636 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 586 transitions. Word has length 32 [2021-11-20 07:46:54,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:46:54,636 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 586 transitions. [2021-11-20 07:46:54,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:46:54,636 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 586 transitions. [2021-11-20 07:46:54,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-20 07:46:54,637 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:46:54,637 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:46:54,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-20 07:46:54,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:46:54,848 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr80ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:46:54,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:46:54,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1682263433, now seen corresponding path program 1 times [2021-11-20 07:46:54,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:46:54,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [294347164] [2021-11-20 07:46:54,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:46:54,849 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:46:54,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:46:54,850 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:46:54,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-20 07:46:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:46:54,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 07:46:54,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:46:55,009 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 07:46:55,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:46:55,094 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 07:46:55,094 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:46:55,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [294347164] [2021-11-20 07:46:55,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [294347164] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:46:55,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:46:55,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-11-20 07:46:55,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011422120] [2021-11-20 07:46:55,095 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:46:55,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:46:55,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:46:55,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:46:55,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:46:55,096 INFO L87 Difference]: Start difference. First operand 452 states and 586 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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) [2021-11-20 07:46:55,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:46:55,130 INFO L93 Difference]: Finished difference Result 451 states and 585 transitions. [2021-11-20 07:46:55,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:46:55,131 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 33 [2021-11-20 07:46:55,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:46:55,134 INFO L225 Difference]: With dead ends: 451 [2021-11-20 07:46:55,134 INFO L226 Difference]: Without dead ends: 451 [2021-11-20 07:46:55,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:46:55,135 INFO L933 BasicCegarLoop]: 330 mSDtfsCounter, 241 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:46:55,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 1061 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:46:55,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-11-20 07:46:55,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 451. [2021-11-20 07:46:55,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 297 states have (on average 1.754208754208754) internal successors, (521), 412 states have internal predecessors, (521), 26 states have call successors, (26), 15 states have call predecessors, (26), 19 states have return successors, (38), 27 states have call predecessors, (38), 26 states have call successors, (38) [2021-11-20 07:46:55,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 585 transitions. [2021-11-20 07:46:55,157 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 585 transitions. Word has length 33 [2021-11-20 07:46:55,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:46:55,158 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 585 transitions. [2021-11-20 07:46:55,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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) [2021-11-20 07:46:55,158 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 585 transitions. [2021-11-20 07:46:55,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-20 07:46:55,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:46:55,159 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:46:55,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-20 07:46:55,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:46:55,371 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:46:55,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:46:55,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1682263216, now seen corresponding path program 1 times [2021-11-20 07:46:55,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:46:55,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1201248580] [2021-11-20 07:46:55,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:46:55,372 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:46:55,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:46:55,375 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:46:55,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-20 07:46:55,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:46:55,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:46:55,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:46:55,552 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 07:46:55,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:46:55,670 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 07:46:55,671 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:46:55,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1201248580] [2021-11-20 07:46:55,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1201248580] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:46:55,671 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:46:55,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-20 07:46:55,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728216064] [2021-11-20 07:46:55,671 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:46:55,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:46:55,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:46:55,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:46:55,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:46:55,672 INFO L87 Difference]: Start difference. First operand 451 states and 585 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:46:55,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:46:55,706 INFO L93 Difference]: Finished difference Result 498 states and 628 transitions. [2021-11-20 07:46:55,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:46:55,707 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2021-11-20 07:46:55,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:46:55,710 INFO L225 Difference]: With dead ends: 498 [2021-11-20 07:46:55,710 INFO L226 Difference]: Without dead ends: 498 [2021-11-20 07:46:55,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:46:55,711 INFO L933 BasicCegarLoop]: 374 mSDtfsCounter, 49 mSDsluCounter, 1070 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1444 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:46:55,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 1444 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:46:55,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-11-20 07:46:55,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 449. [2021-11-20 07:46:55,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 296 states have (on average 1.7466216216216217) internal successors, (517), 410 states have internal predecessors, (517), 25 states have call successors, (25), 15 states have call predecessors, (25), 19 states have return successors, (36), 27 states have call predecessors, (36), 25 states have call successors, (36) [2021-11-20 07:46:55,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 578 transitions. [2021-11-20 07:46:55,726 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 578 transitions. Word has length 33 [2021-11-20 07:46:55,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:46:55,726 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 578 transitions. [2021-11-20 07:46:55,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:46:55,726 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 578 transitions. [2021-11-20 07:46:55,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-20 07:46:55,727 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:46:55,727 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:46:55,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-20 07:46:55,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:46:55,947 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:46:55,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:46:55,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1653634065, now seen corresponding path program 1 times [2021-11-20 07:46:55,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:46:55,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [41506664] [2021-11-20 07:46:55,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:46:55,949 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:46:55,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:46:55,950 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:46:55,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-20 07:46:56,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:46:56,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 07:46:56,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:46:56,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:46:56,184 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 07:46:56,184 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 22 treesize of output 29 [2021-11-20 07:46:56,354 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-11-20 07:46:56,355 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 3 case distinctions, treesize of input 32 treesize of output 43 [2021-11-20 07:46:56,422 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:46:56,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:47:12,958 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 0 refuted. 2 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:47:12,959 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:47:12,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [41506664] [2021-11-20 07:47:12,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [41506664] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:47:12,959 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:47:12,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-11-20 07:47:12,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703462630] [2021-11-20 07:47:12,959 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:47:12,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 07:47:12,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:47:12,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 07:47:12,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=85, Unknown=7, NotChecked=0, Total=132 [2021-11-20 07:47:12,960 INFO L87 Difference]: Start difference. First operand 449 states and 578 transitions. Second operand has 12 states, 10 states have (on average 3.8) internal successors, (38), 12 states have internal predecessors, (38), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-20 07:47:12,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:47:12,978 INFO L93 Difference]: Finished difference Result 531 states and 689 transitions. [2021-11-20 07:47:12,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:47:12,979 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.8) internal successors, (38), 12 states have internal predecessors, (38), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 33 [2021-11-20 07:47:12,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:47:12,981 INFO L225 Difference]: With dead ends: 531 [2021-11-20 07:47:12,981 INFO L226 Difference]: Without dead ends: 531 [2021-11-20 07:47:12,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=40, Invalid=85, Unknown=7, NotChecked=0, Total=132 [2021-11-20 07:47:12,982 INFO L933 BasicCegarLoop]: 412 mSDtfsCounter, 105 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1342 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 402 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:47:12,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 1342 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 402 Unchecked, 0.0s Time] [2021-11-20 07:47:12,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-20 07:47:12,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 467. [2021-11-20 07:47:12,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 311 states have (on average 1.729903536977492) internal successors, (538), 425 states have internal predecessors, (538), 26 states have call successors, (26), 17 states have call predecessors, (26), 22 states have return successors, (38), 28 states have call predecessors, (38), 26 states have call successors, (38) [2021-11-20 07:47:12,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 602 transitions. [2021-11-20 07:47:12,996 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 602 transitions. Word has length 33 [2021-11-20 07:47:12,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:47:12,996 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 602 transitions. [2021-11-20 07:47:12,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.8) internal successors, (38), 12 states have internal predecessors, (38), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-20 07:47:12,997 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 602 transitions. [2021-11-20 07:47:12,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-20 07:47:12,997 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:47:12,997 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:47:13,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-20 07:47:13,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:47:13,209 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:47:13,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:47:13,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1653634066, now seen corresponding path program 1 times [2021-11-20 07:47:13,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:47:13,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [659068639] [2021-11-20 07:47:13,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:47:13,210 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:47:13,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:47:13,210 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:47:13,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-20 07:47:13,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:47:13,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-20 07:47:13,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:47:13,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:47:13,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:47:13,568 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:47:13,568 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 34 treesize of output 36 [2021-11-20 07:47:13,589 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 07:47:13,590 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 [2021-11-20 07:47:13,851 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:47:13,852 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 46 treesize of output 48 [2021-11-20 07:47:13,909 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-11-20 07:47:13,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 57 [2021-11-20 07:47:16,386 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:47:16,386 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 63 treesize of output 65 [2021-11-20 07:47:16,421 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-11-20 07:47:16,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 61 [2021-11-20 07:47:16,478 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:47:16,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:47:34,085 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_27| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_9| (_ BitVec 32)) (|v_ldv_malloc_#res.base_263| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_263|)))) (and (forall ((v_ldv_malloc_~size_245 (_ BitVec 32))) (bvule (bvadd |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_9| (_ bv20 32)) (select (store |c_#length| |v_ldv_malloc_#res.base_263| v_ldv_malloc_~size_245) |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_27|))) (bvule (bvadd (_ bv16 32) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_9|) (bvadd |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_9| (_ bv20 32)))) (exists ((|v_ldv_malloc_#res.base_267| (_ BitVec 32)) (|v_ldv_malloc_#res.base_263| (_ BitVec 32))) (and (or (not (bvule (bvadd (_ bv16 32) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_9|) (bvadd |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_9| (_ bv20 32)))) (exists ((v_ldv_malloc_~size_245 (_ BitVec 32)) (v_ldv_malloc_~size_249 (_ BitVec 32))) (not (bvule (bvadd |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_9| (_ bv20 32)) (select (store (store |c_old(#length)| |v_ldv_malloc_#res.base_267| v_ldv_malloc_~size_249) |v_ldv_malloc_#res.base_263| v_ldv_malloc_~size_245) |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_27|))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_267|))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_ldv_malloc_#res.base_267| (_ bv1 1)) |v_ldv_malloc_#res.base_263|)))))))))))) is different from false [2021-11-20 07:47:40,975 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ldv_malloc_#res.base_268| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_27| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_9| (_ BitVec 32)) (|v_ldv_malloc_#res.base_263| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select (store |c_#valid| |v_ldv_malloc_#res.base_268| (_ bv1 1)) |v_ldv_malloc_#res.base_263|)))) (not (= (_ bv0 1) (select |c_#valid| |v_ldv_malloc_#res.base_268|))) (and (forall ((v_ldv_malloc_~size_245 (_ BitVec 32)) (ldv_malloc_~size (_ BitVec 32))) (bvule (bvadd |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_9| (_ bv20 32)) (select (store (store |c_#length| |v_ldv_malloc_#res.base_268| ldv_malloc_~size) |v_ldv_malloc_#res.base_263| v_ldv_malloc_~size_245) |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_27|))) (bvule (bvadd (_ bv16 32) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_9|) (bvadd |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_9| (_ bv20 32)))) (exists ((|v_ldv_malloc_#res.base_267| (_ BitVec 32)) (|v_ldv_malloc_#res.base_263| (_ BitVec 32))) (and (or (not (bvule (bvadd (_ bv16 32) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_9|) (bvadd |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_9| (_ bv20 32)))) (exists ((v_ldv_malloc_~size_245 (_ BitVec 32)) (v_ldv_malloc_~size_249 (_ BitVec 32))) (not (bvule (bvadd |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_9| (_ bv20 32)) (select (store (store |c_old(#length)| |v_ldv_malloc_#res.base_267| v_ldv_malloc_~size_249) |v_ldv_malloc_#res.base_263| v_ldv_malloc_~size_245) |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_27|))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_267|))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_ldv_malloc_#res.base_267| (_ bv1 1)) |v_ldv_malloc_#res.base_263|)))))))))))) is different from false [2021-11-20 07:48:55,973 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_10| (_ BitVec 32)) (|v_ldv_malloc_#res.base_267| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_28| (_ BitVec 32)) (|v_ldv_malloc_#res.base_272| (_ BitVec 32)) (|v_ldv_malloc_#res.base_263| (_ BitVec 32))) (let ((.cse0 (store |c_#valid| |v_ldv_malloc_#res.base_272| (_ bv1 1)))) (or (and (bvule (bvadd (_ bv16 32) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_10|) (bvadd (_ bv20 32) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_10|)) (forall ((v_ldv_malloc_~size_245 (_ BitVec 32)) (ldv_malloc_~size (_ BitVec 32)) (v_ldv_malloc_~size_249 (_ BitVec 32))) (bvule (bvadd (_ bv20 32) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_10|) (select (store (store (store |c_#length| |v_ldv_malloc_#res.base_272| ldv_malloc_~size) |v_ldv_malloc_#res.base_267| v_ldv_malloc_~size_249) |v_ldv_malloc_#res.base_263| v_ldv_malloc_~size_245) |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_28|)))) (not (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select .cse0 |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_28|)))))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select .cse0 |v_ldv_malloc_#res.base_267|)))))) (exists ((|v_ldv_malloc_#res.base_267| (_ BitVec 32)) (|v_ldv_malloc_#res.base_271| (_ BitVec 32)) (|v_ldv_malloc_#res.base_263| (_ BitVec 32))) (let ((.cse1 (store |c_old(#valid)| |v_ldv_malloc_#res.base_271| (_ bv1 1)))) (and (or (exists ((v_ldv_malloc_~size_245 (_ BitVec 32)) (v_ldv_malloc_~size_253 (_ BitVec 32)) (v_ldv_malloc_~size_249 (_ BitVec 32))) (not (bvule (bvadd (_ bv20 32) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_10|) (select (store (store (store |c_old(#length)| |v_ldv_malloc_#res.base_271| v_ldv_malloc_~size_253) |v_ldv_malloc_#res.base_267| v_ldv_malloc_~size_249) |v_ldv_malloc_#res.base_263| v_ldv_malloc_~size_245) |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_28|)))) (not (bvule (bvadd (_ bv16 32) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_10|) (bvadd (_ bv20 32) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_10|)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_28|))) (_ bv1 1))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select (store .cse1 |v_ldv_malloc_#res.base_267| (_ bv1 1)) |v_ldv_malloc_#res.base_263|)))))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_271|))) (= (_ bv0 1) (bvneg (bvneg (bvneg (select .cse1 |v_ldv_malloc_#res.base_267|)))))))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select (store .cse0 |v_ldv_malloc_#res.base_267| (_ bv1 1)) |v_ldv_malloc_#res.base_263|)))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_272|))))))) is different from true [2021-11-20 07:49:14,790 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 07:49:14,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 242 treesize of output 236 [2021-11-20 07:49:14,986 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 5 refuted. 2 times theorem prover too weak. 0 trivial. 14 not checked. [2021-11-20 07:49:14,987 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:49:14,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [659068639] [2021-11-20 07:49:14,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [659068639] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:49:14,987 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:49:14,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 25 [2021-11-20 07:49:14,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954601142] [2021-11-20 07:49:14,987 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:49:14,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 07:49:14,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:49:14,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 07:49:14,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=415, Unknown=16, NotChecked=132, Total=650 [2021-11-20 07:49:14,989 INFO L87 Difference]: Start difference. First operand 467 states and 602 transitions. Second operand has 26 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-11-20 07:49:17,711 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_10| (_ BitVec 32)) (|v_ldv_malloc_#res.base_267| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_28| (_ BitVec 32)) (|v_ldv_malloc_#res.base_272| (_ BitVec 32)) (|v_ldv_malloc_#res.base_263| (_ BitVec 32))) (let ((.cse0 (store |c_#valid| |v_ldv_malloc_#res.base_272| (_ bv1 1)))) (or (and (bvule (bvadd (_ bv16 32) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_10|) (bvadd (_ bv20 32) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_10|)) (forall ((v_ldv_malloc_~size_245 (_ BitVec 32)) (ldv_malloc_~size (_ BitVec 32)) (v_ldv_malloc_~size_249 (_ BitVec 32))) (bvule (bvadd (_ bv20 32) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_10|) (select (store (store (store |c_#length| |v_ldv_malloc_#res.base_272| ldv_malloc_~size) |v_ldv_malloc_#res.base_267| v_ldv_malloc_~size_249) |v_ldv_malloc_#res.base_263| v_ldv_malloc_~size_245) |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_28|)))) (not (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select .cse0 |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_28|)))))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select .cse0 |v_ldv_malloc_#res.base_267|)))))) (exists ((|v_ldv_malloc_#res.base_267| (_ BitVec 32)) (|v_ldv_malloc_#res.base_271| (_ BitVec 32)) (|v_ldv_malloc_#res.base_263| (_ BitVec 32))) (let ((.cse1 (store |c_old(#valid)| |v_ldv_malloc_#res.base_271| (_ bv1 1)))) (and (or (exists ((v_ldv_malloc_~size_245 (_ BitVec 32)) (v_ldv_malloc_~size_253 (_ BitVec 32)) (v_ldv_malloc_~size_249 (_ BitVec 32))) (not (bvule (bvadd (_ bv20 32) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_10|) (select (store (store (store |c_old(#length)| |v_ldv_malloc_#res.base_271| v_ldv_malloc_~size_253) |v_ldv_malloc_#res.base_267| v_ldv_malloc_~size_249) |v_ldv_malloc_#res.base_263| v_ldv_malloc_~size_245) |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_28|)))) (not (bvule (bvadd (_ bv16 32) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_10|) (bvadd (_ bv20 32) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_10|)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_28|))) (_ bv1 1))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select (store .cse1 |v_ldv_malloc_#res.base_267| (_ bv1 1)) |v_ldv_malloc_#res.base_263|)))))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_271|))) (= (_ bv0 1) (bvneg (bvneg (bvneg (select .cse1 |v_ldv_malloc_#res.base_267|)))))))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select (store .cse0 |v_ldv_malloc_#res.base_267| (_ bv1 1)) |v_ldv_malloc_#res.base_263|)))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_272|))))))) (= |c_old(#valid)| |c_#valid|) (= |c_#length| |c_old(#length)|) (or (not (= (_ bv20 32) |c_ldv_malloc_#in~size|)) (bvule (_ bv20 32) c_ldv_malloc_~size))) is different from false [2021-11-20 07:49:19,723 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_10| (_ BitVec 32)) (|v_ldv_malloc_#res.base_267| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_28| (_ BitVec 32)) (|v_ldv_malloc_#res.base_272| (_ BitVec 32)) (|v_ldv_malloc_#res.base_263| (_ BitVec 32))) (let ((.cse0 (store |c_#valid| |v_ldv_malloc_#res.base_272| (_ bv1 1)))) (or (and (bvule (bvadd (_ bv16 32) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_10|) (bvadd (_ bv20 32) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_10|)) (forall ((v_ldv_malloc_~size_245 (_ BitVec 32)) (ldv_malloc_~size (_ BitVec 32)) (v_ldv_malloc_~size_249 (_ BitVec 32))) (bvule (bvadd (_ bv20 32) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_10|) (select (store (store (store |c_#length| |v_ldv_malloc_#res.base_272| ldv_malloc_~size) |v_ldv_malloc_#res.base_267| v_ldv_malloc_~size_249) |v_ldv_malloc_#res.base_263| v_ldv_malloc_~size_245) |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_28|)))) (not (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select .cse0 |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_28|)))))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select .cse0 |v_ldv_malloc_#res.base_267|)))))) (exists ((|v_ldv_malloc_#res.base_267| (_ BitVec 32)) (|v_ldv_malloc_#res.base_271| (_ BitVec 32)) (|v_ldv_malloc_#res.base_263| (_ BitVec 32))) (let ((.cse1 (store |c_old(#valid)| |v_ldv_malloc_#res.base_271| (_ bv1 1)))) (and (or (exists ((v_ldv_malloc_~size_245 (_ BitVec 32)) (v_ldv_malloc_~size_253 (_ BitVec 32)) (v_ldv_malloc_~size_249 (_ BitVec 32))) (not (bvule (bvadd (_ bv20 32) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_10|) (select (store (store (store |c_old(#length)| |v_ldv_malloc_#res.base_271| v_ldv_malloc_~size_253) |v_ldv_malloc_#res.base_267| v_ldv_malloc_~size_249) |v_ldv_malloc_#res.base_263| v_ldv_malloc_~size_245) |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_28|)))) (not (bvule (bvadd (_ bv16 32) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_10|) (bvadd (_ bv20 32) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_10|)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_28|))) (_ bv1 1))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select (store .cse1 |v_ldv_malloc_#res.base_267| (_ bv1 1)) |v_ldv_malloc_#res.base_263|)))))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_271|))) (= (_ bv0 1) (bvneg (bvneg (bvneg (select .cse1 |v_ldv_malloc_#res.base_267|)))))))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select (store .cse0 |v_ldv_malloc_#res.base_267| (_ bv1 1)) |v_ldv_malloc_#res.base_263|)))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_272|))))))) (= |c_old(#valid)| |c_#valid|) (= c_ldv_malloc_~size |c_ldv_malloc_#in~size|) (= |c_#length| |c_old(#length)|)) is different from false [2021-11-20 07:49:27,884 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_old(#valid)| |c_#valid|) (= c_ldv_malloc_~size |c_ldv_malloc_#in~size|) (forall ((|v_ldv_malloc_#res.base_268| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_27| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_9| (_ BitVec 32)) (|v_ldv_malloc_#res.base_263| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select (store |c_#valid| |v_ldv_malloc_#res.base_268| (_ bv1 1)) |v_ldv_malloc_#res.base_263|)))) (not (= (_ bv0 1) (select |c_#valid| |v_ldv_malloc_#res.base_268|))) (and (forall ((v_ldv_malloc_~size_245 (_ BitVec 32)) (ldv_malloc_~size (_ BitVec 32))) (bvule (bvadd |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_9| (_ bv20 32)) (select (store (store |c_#length| |v_ldv_malloc_#res.base_268| ldv_malloc_~size) |v_ldv_malloc_#res.base_263| v_ldv_malloc_~size_245) |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_27|))) (bvule (bvadd (_ bv16 32) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_9|) (bvadd |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_9| (_ bv20 32)))) (exists ((|v_ldv_malloc_#res.base_267| (_ BitVec 32)) (|v_ldv_malloc_#res.base_263| (_ BitVec 32))) (and (or (not (bvule (bvadd (_ bv16 32) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_9|) (bvadd |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_9| (_ bv20 32)))) (exists ((v_ldv_malloc_~size_245 (_ BitVec 32)) (v_ldv_malloc_~size_249 (_ BitVec 32))) (not (bvule (bvadd |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_9| (_ bv20 32)) (select (store (store |c_old(#length)| |v_ldv_malloc_#res.base_267| v_ldv_malloc_~size_249) |v_ldv_malloc_#res.base_263| v_ldv_malloc_~size_245) |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_27|))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_267|))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_ldv_malloc_#res.base_267| (_ bv1 1)) |v_ldv_malloc_#res.base_263|)))))))))))) (= |c_#length| |c_old(#length)|)) is different from false [2021-11-20 07:49:52,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:49:52,171 INFO L93 Difference]: Finished difference Result 517 states and 653 transitions. [2021-11-20 07:49:52,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:49:52,173 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 33 [2021-11-20 07:49:52,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:49:52,180 INFO L225 Difference]: With dead ends: 517 [2021-11-20 07:49:52,181 INFO L226 Difference]: Without dead ends: 517 [2021-11-20 07:49:52,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 73.9s TimeCoverageRelationStatistics Valid=108, Invalid=497, Unknown=19, NotChecked=306, Total=930 [2021-11-20 07:49:52,184 INFO L933 BasicCegarLoop]: 358 mSDtfsCounter, 66 mSDsluCounter, 2978 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 3336 SdHoareTripleChecker+Invalid, 2956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2249 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:49:52,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 3336 Invalid, 2956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 702 Invalid, 0 Unknown, 2249 Unchecked, 2.1s Time] [2021-11-20 07:49:52,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-11-20 07:49:52,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 466. [2021-11-20 07:49:52,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 311 states have (on average 1.7266881028938907) internal successors, (537), 424 states have internal predecessors, (537), 26 states have call successors, (26), 17 states have call predecessors, (26), 22 states have return successors, (38), 28 states have call predecessors, (38), 26 states have call successors, (38) [2021-11-20 07:49:52,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 601 transitions. [2021-11-20 07:49:52,204 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 601 transitions. Word has length 33 [2021-11-20 07:49:52,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:49:52,205 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 601 transitions. [2021-11-20 07:49:52,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-11-20 07:49:52,205 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 601 transitions. [2021-11-20 07:49:52,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-20 07:49:52,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:49:52,206 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:49:52,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-20 07:49:52,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:49:52,420 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr81ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:49:52,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:49:52,421 INFO L85 PathProgramCache]: Analyzing trace with hash 610559287, now seen corresponding path program 1 times [2021-11-20 07:49:52,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:49:52,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1548581321] [2021-11-20 07:49:52,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:49:52,421 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:49:52,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:49:52,422 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:49:52,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-20 07:49:52,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:49:52,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:49:52,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:49:52,975 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 07:49:52,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:49:53,162 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 07:49:53,162 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:49:53,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1548581321] [2021-11-20 07:49:53,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1548581321] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:49:53,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:49:53,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-11-20 07:49:53,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85532144] [2021-11-20 07:49:53,163 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:49:53,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 07:49:53,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:49:53,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 07:49:53,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:49:53,165 INFO L87 Difference]: Start difference. First operand 466 states and 601 transitions. Second operand has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 5 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-20 07:49:53,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:49:53,459 INFO L93 Difference]: Finished difference Result 669 states and 829 transitions. [2021-11-20 07:49:53,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:49:53,460 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 5 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 34 [2021-11-20 07:49:53,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:49:53,464 INFO L225 Difference]: With dead ends: 669 [2021-11-20 07:49:53,464 INFO L226 Difference]: Without dead ends: 669 [2021-11-20 07:49:53,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:49:53,465 INFO L933 BasicCegarLoop]: 420 mSDtfsCounter, 300 mSDsluCounter, 1743 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 2163 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:49:53,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 2163 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 149 Invalid, 0 Unknown, 144 Unchecked, 0.3s Time] [2021-11-20 07:49:53,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-11-20 07:49:53,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 551. [2021-11-20 07:49:53,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 385 states have (on average 1.748051948051948) internal successors, (673), 498 states have internal predecessors, (673), 34 states have call successors, (34), 22 states have call predecessors, (34), 28 states have return successors, (49), 36 states have call predecessors, (49), 34 states have call successors, (49) [2021-11-20 07:49:53,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 756 transitions. [2021-11-20 07:49:53,482 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 756 transitions. Word has length 34 [2021-11-20 07:49:53,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:49:53,482 INFO L470 AbstractCegarLoop]: Abstraction has 551 states and 756 transitions. [2021-11-20 07:49:53,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 5 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-20 07:49:53,482 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 756 transitions. [2021-11-20 07:49:53,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-20 07:49:53,483 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:49:53,483 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-20 07:49:53,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-20 07:49:53,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:49:53,705 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr91REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:49:53,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:49:53,706 INFO L85 PathProgramCache]: Analyzing trace with hash 2092671515, now seen corresponding path program 1 times [2021-11-20 07:49:53,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:49:53,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [671260902] [2021-11-20 07:49:53,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:49:53,707 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:49:53,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:49:53,707 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:49:53,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-20 07:49:53,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:49:53,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 07:49:53,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:49:54,119 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-20 07:49:54,119 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 1 case distinctions, treesize of input 19 treesize of output 26 [2021-11-20 07:49:54,316 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 22 treesize of output 21 [2021-11-20 07:49:54,424 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 29 treesize of output 21 [2021-11-20 07:49:54,538 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:49:54,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:49:54,668 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-11-20 07:49:54,669 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 35 treesize of output 34 [2021-11-20 07:49:55,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 07:49:55,009 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:49:55,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [671260902] [2021-11-20 07:49:55,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [671260902] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 07:49:55,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:49:55,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2021-11-20 07:49:55,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532400666] [2021-11-20 07:49:55,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:49:55,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:49:55,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:49:55,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:49:55,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:49:55,011 INFO L87 Difference]: Start difference. First operand 551 states and 756 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:49:57,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:49:57,603 INFO L93 Difference]: Finished difference Result 591 states and 797 transitions. [2021-11-20 07:49:57,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:49:57,605 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2021-11-20 07:49:57,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:49:57,607 INFO L225 Difference]: With dead ends: 591 [2021-11-20 07:49:57,607 INFO L226 Difference]: Without dead ends: 591 [2021-11-20 07:49:57,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-11-20 07:49:57,608 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 91 mSDsluCounter, 1406 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1721 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:49:57,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 1721 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-20 07:49:57,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-11-20 07:49:57,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 553. [2021-11-20 07:49:57,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 387 states have (on average 1.7467700258397933) internal successors, (676), 500 states have internal predecessors, (676), 34 states have call successors, (34), 22 states have call predecessors, (34), 28 states have return successors, (49), 36 states have call predecessors, (49), 34 states have call successors, (49) [2021-11-20 07:49:57,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 759 transitions. [2021-11-20 07:49:57,623 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 759 transitions. Word has length 34 [2021-11-20 07:49:57,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:49:57,624 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 759 transitions. [2021-11-20 07:49:57,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:49:57,624 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 759 transitions. [2021-11-20 07:49:57,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-20 07:49:57,625 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:49:57,625 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-20 07:49:57,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-20 07:49:57,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:49:57,837 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr92REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:49:57,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:49:57,837 INFO L85 PathProgramCache]: Analyzing trace with hash 2092671516, now seen corresponding path program 1 times [2021-11-20 07:49:57,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:49:57,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1397678405] [2021-11-20 07:49:57,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:49:57,838 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:49:57,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:49:57,840 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:49:57,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-20 07:49:57,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:49:57,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 07:49:57,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:49:58,435 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-20 07:49:58,435 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 1 case distinctions, treesize of input 37 treesize of output 44 [2021-11-20 07:49:58,472 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-20 07:49:58,472 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 1 case distinctions, treesize of input 34 treesize of output 41 [2021-11-20 07:49:58,774 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 30 treesize of output 29 [2021-11-20 07:49:58,898 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 53 treesize of output 45 [2021-11-20 07:49:58,902 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 34 [2021-11-20 07:49:58,912 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:49:58,913 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 31 treesize of output 31 [2021-11-20 07:49:58,992 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:49:58,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:49:59,148 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:49:59,148 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 42 [2021-11-20 07:49:59,421 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 11 [2021-11-20 07:50:00,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 07:50:00,333 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:50:00,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1397678405] [2021-11-20 07:50:00,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1397678405] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 07:50:00,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:50:00,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2021-11-20 07:50:00,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543305452] [2021-11-20 07:50:00,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:50:00,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:50:00,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:50:00,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:50:00,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:50:00,334 INFO L87 Difference]: Start difference. First operand 553 states and 759 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:50:03,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:50:03,867 INFO L93 Difference]: Finished difference Result 591 states and 797 transitions. [2021-11-20 07:50:03,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:50:03,869 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2021-11-20 07:50:03,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:50:03,873 INFO L225 Difference]: With dead ends: 591 [2021-11-20 07:50:03,873 INFO L226 Difference]: Without dead ends: 591 [2021-11-20 07:50:03,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-11-20 07:50:03,874 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 113 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1502 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:50:03,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 1502 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-20 07:50:03,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-11-20 07:50:03,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 553. [2021-11-20 07:50:03,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 387 states have (on average 1.744186046511628) internal successors, (675), 500 states have internal predecessors, (675), 34 states have call successors, (34), 22 states have call predecessors, (34), 28 states have return successors, (49), 36 states have call predecessors, (49), 34 states have call successors, (49) [2021-11-20 07:50:03,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 758 transitions. [2021-11-20 07:50:03,889 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 758 transitions. Word has length 34 [2021-11-20 07:50:03,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:50:03,890 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 758 transitions. [2021-11-20 07:50:03,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:50:03,890 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 758 transitions. [2021-11-20 07:50:03,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 07:50:03,891 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:50:03,891 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:50:03,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-20 07:50:04,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:50:04,103 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr82ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:50:04,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:50:04,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1747469131, now seen corresponding path program 1 times [2021-11-20 07:50:04,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:50:04,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [847020710] [2021-11-20 07:50:04,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:50:04,104 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:50:04,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:50:04,105 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:50:04,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-20 07:50:04,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:50:04,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 07:50:04,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:50:04,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:50:04,293 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:50:04,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:50:04,445 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:50:04,446 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:50:04,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [847020710] [2021-11-20 07:50:04,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [847020710] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:50:04,446 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:50:04,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-20 07:50:04,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109768077] [2021-11-20 07:50:04,446 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:50:04,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:50:04,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:50:04,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:50:04,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:50:04,447 INFO L87 Difference]: Start difference. First operand 553 states and 758 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:50:05,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:50:05,138 INFO L93 Difference]: Finished difference Result 556 states and 761 transitions. [2021-11-20 07:50:05,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:50:05,139 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2021-11-20 07:50:05,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:50:05,142 INFO L225 Difference]: With dead ends: 556 [2021-11-20 07:50:05,142 INFO L226 Difference]: Without dead ends: 556 [2021-11-20 07:50:05,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:50:05,143 INFO L933 BasicCegarLoop]: 337 mSDtfsCounter, 0 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1158 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:50:05,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1158 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 393 Invalid, 0 Unknown, 158 Unchecked, 0.7s Time] [2021-11-20 07:50:05,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-11-20 07:50:05,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 556. [2021-11-20 07:50:05,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 390 states have (on average 1.7384615384615385) internal successors, (678), 503 states have internal predecessors, (678), 34 states have call successors, (34), 22 states have call predecessors, (34), 28 states have return successors, (49), 36 states have call predecessors, (49), 34 states have call successors, (49) [2021-11-20 07:50:05,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 761 transitions. [2021-11-20 07:50:05,157 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 761 transitions. Word has length 35 [2021-11-20 07:50:05,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:50:05,158 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 761 transitions. [2021-11-20 07:50:05,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:50:05,158 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 761 transitions. [2021-11-20 07:50:05,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 07:50:05,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:50:05,159 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:50:05,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2021-11-20 07:50:05,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:50:05,372 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr82ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:50:05,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:50:05,372 INFO L85 PathProgramCache]: Analyzing trace with hash 4658796, now seen corresponding path program 1 times [2021-11-20 07:50:05,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:50:05,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2031079220] [2021-11-20 07:50:05,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:50:05,373 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:50:05,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:50:05,374 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:50:05,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-20 07:50:05,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:50:05,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 07:50:05,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:50:05,535 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 07:50:05,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:50:05,602 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 07:50:05,602 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:50:05,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2031079220] [2021-11-20 07:50:05,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2031079220] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:50:05,603 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:50:05,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-20 07:50:05,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517462195] [2021-11-20 07:50:05,603 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:50:05,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:50:05,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:50:05,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:50:05,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:50:05,605 INFO L87 Difference]: Start difference. First operand 556 states and 761 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:50:05,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:50:05,637 INFO L93 Difference]: Finished difference Result 598 states and 803 transitions. [2021-11-20 07:50:05,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:50:05,638 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2021-11-20 07:50:05,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:50:05,640 INFO L225 Difference]: With dead ends: 598 [2021-11-20 07:50:05,640 INFO L226 Difference]: Without dead ends: 598 [2021-11-20 07:50:05,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:50:05,641 INFO L933 BasicCegarLoop]: 381 mSDtfsCounter, 238 mSDsluCounter, 888 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 1269 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:50:05,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 1269 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:50:05,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-11-20 07:50:05,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 554. [2021-11-20 07:50:05,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 388 states have (on average 1.7396907216494846) internal successors, (675), 501 states have internal predecessors, (675), 34 states have call successors, (34), 22 states have call predecessors, (34), 28 states have return successors, (49), 36 states have call predecessors, (49), 34 states have call successors, (49) [2021-11-20 07:50:05,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 758 transitions. [2021-11-20 07:50:05,655 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 758 transitions. Word has length 35 [2021-11-20 07:50:05,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:50:05,655 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 758 transitions. [2021-11-20 07:50:05,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:50:05,655 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 758 transitions. [2021-11-20 07:50:05,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 07:50:05,656 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:50:05,656 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 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] [2021-11-20 07:50:05,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-11-20 07:50:05,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:50:05,868 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr84ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:50:05,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:50:05,868 INFO L85 PathProgramCache]: Analyzing trace with hash -14364371, now seen corresponding path program 1 times [2021-11-20 07:50:05,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:50:05,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1176059912] [2021-11-20 07:50:05,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:50:05,869 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:50:05,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:50:05,870 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:50:05,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-20 07:50:05,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:50:05,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:50:05,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:50:06,501 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 07:50:06,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:50:06,700 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 07:50:06,700 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:50:06,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1176059912] [2021-11-20 07:50:06,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1176059912] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:50:06,701 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:50:06,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-11-20 07:50:06,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609863028] [2021-11-20 07:50:06,701 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:50:06,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 07:50:06,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:50:06,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 07:50:06,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:50:06,703 INFO L87 Difference]: Start difference. First operand 554 states and 758 transitions. Second operand has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 5 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-20 07:50:07,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:50:07,022 INFO L93 Difference]: Finished difference Result 675 states and 833 transitions. [2021-11-20 07:50:07,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:50:07,023 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 5 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 37 [2021-11-20 07:50:07,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:50:07,026 INFO L225 Difference]: With dead ends: 675 [2021-11-20 07:50:07,026 INFO L226 Difference]: Without dead ends: 675 [2021-11-20 07:50:07,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:50:07,026 INFO L933 BasicCegarLoop]: 420 mSDtfsCounter, 292 mSDsluCounter, 1508 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 1928 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:50:07,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 1928 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 161 Invalid, 0 Unknown, 107 Unchecked, 0.3s Time] [2021-11-20 07:50:07,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-11-20 07:50:07,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 556. [2021-11-20 07:50:07,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 390 states have (on average 1.735897435897436) internal successors, (677), 503 states have internal predecessors, (677), 34 states have call successors, (34), 22 states have call predecessors, (34), 28 states have return successors, (49), 36 states have call predecessors, (49), 34 states have call successors, (49) [2021-11-20 07:50:07,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 760 transitions. [2021-11-20 07:50:07,039 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 760 transitions. Word has length 37 [2021-11-20 07:50:07,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:50:07,039 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 760 transitions. [2021-11-20 07:50:07,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 5 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-20 07:50:07,040 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 760 transitions. [2021-11-20 07:50:07,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 07:50:07,040 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:50:07,040 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:50:07,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-20 07:50:07,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:50:07,256 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr93REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:50:07,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:50:07,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1327181508, now seen corresponding path program 1 times [2021-11-20 07:50:07,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:50:07,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [886096260] [2021-11-20 07:50:07,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:50:07,257 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:50:07,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:50:07,258 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:50:07,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-20 07:50:07,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:50:07,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 07:50:07,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:50:07,410 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 07:50:07,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:50:07,469 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 07:50:07,469 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:50:07,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [886096260] [2021-11-20 07:50:07,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [886096260] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:50:07,469 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:50:07,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 07:50:07,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078139911] [2021-11-20 07:50:07,469 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:50:07,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:50:07,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:50:07,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:50:07,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:50:07,470 INFO L87 Difference]: Start difference. First operand 556 states and 760 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:50:08,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:50:08,012 INFO L93 Difference]: Finished difference Result 574 states and 779 transitions. [2021-11-20 07:50:08,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:50:08,013 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2021-11-20 07:50:08,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:50:08,016 INFO L225 Difference]: With dead ends: 574 [2021-11-20 07:50:08,016 INFO L226 Difference]: Without dead ends: 574 [2021-11-20 07:50:08,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:50:08,017 INFO L933 BasicCegarLoop]: 322 mSDtfsCounter, 42 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:50:08,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 738 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 07:50:08,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-20 07:50:08,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 557. [2021-11-20 07:50:08,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 392 states have (on average 1.7346938775510203) internal successors, (680), 504 states have internal predecessors, (680), 34 states have call successors, (34), 22 states have call predecessors, (34), 28 states have return successors, (49), 36 states have call predecessors, (49), 34 states have call successors, (49) [2021-11-20 07:50:08,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 763 transitions. [2021-11-20 07:50:08,030 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 763 transitions. Word has length 37 [2021-11-20 07:50:08,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:50:08,030 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 763 transitions. [2021-11-20 07:50:08,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:50:08,031 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 763 transitions. [2021-11-20 07:50:08,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 07:50:08,031 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:50:08,032 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:50:08,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-20 07:50:08,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:50:08,245 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr94REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:50:08,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:50:08,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1327181509, now seen corresponding path program 1 times [2021-11-20 07:50:08,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:50:08,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940918434] [2021-11-20 07:50:08,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:50:08,246 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:50:08,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:50:08,247 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:50:08,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-20 07:50:08,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:50:08,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 07:50:08,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:50:08,758 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-20 07:50:08,759 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 1 case distinctions, treesize of input 37 treesize of output 44 [2021-11-20 07:50:08,798 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-20 07:50:08,798 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 1 case distinctions, treesize of input 34 treesize of output 41 [2021-11-20 07:50:09,117 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 30 treesize of output 29 [2021-11-20 07:50:09,262 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 52 treesize of output 44 [2021-11-20 07:50:09,276 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 33 [2021-11-20 07:50:09,291 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:50:09,291 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 30 treesize of output 30 [2021-11-20 07:50:09,438 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:50:09,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:50:09,583 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 11 [2021-11-20 07:50:09,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 07:50:09,959 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:50:09,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940918434] [2021-11-20 07:50:09,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940918434] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 07:50:09,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:50:09,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2021-11-20 07:50:09,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896281079] [2021-11-20 07:50:09,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:50:09,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:50:09,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:50:09,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:50:09,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:50:09,960 INFO L87 Difference]: Start difference. First operand 557 states and 763 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:50:11,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:50:11,592 INFO L93 Difference]: Finished difference Result 563 states and 768 transitions. [2021-11-20 07:50:11,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:50:11,603 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2021-11-20 07:50:11,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:50:11,605 INFO L225 Difference]: With dead ends: 563 [2021-11-20 07:50:11,606 INFO L226 Difference]: Without dead ends: 563 [2021-11-20 07:50:11,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-11-20 07:50:11,606 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 57 mSDsluCounter, 1347 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 1671 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:50:11,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 1671 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-20 07:50:11,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-11-20 07:50:11,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 559. [2021-11-20 07:50:11,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 394 states have (on average 1.7309644670050761) internal successors, (682), 506 states have internal predecessors, (682), 34 states have call successors, (34), 22 states have call predecessors, (34), 28 states have return successors, (49), 36 states have call predecessors, (49), 34 states have call successors, (49) [2021-11-20 07:50:11,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 765 transitions. [2021-11-20 07:50:11,620 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 765 transitions. Word has length 37 [2021-11-20 07:50:11,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:50:11,620 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 765 transitions. [2021-11-20 07:50:11,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:50:11,621 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 765 transitions. [2021-11-20 07:50:11,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 07:50:11,622 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:50:11,622 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 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] [2021-11-20 07:50:11,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2021-11-20 07:50:11,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:50:11,863 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr85ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:50:11,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:50:11,863 INFO L85 PathProgramCache]: Analyzing trace with hash -445295076, now seen corresponding path program 1 times [2021-11-20 07:50:11,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:50:11,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [44961566] [2021-11-20 07:50:11,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:50:11,863 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:50:11,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:50:11,864 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:50:11,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-20 07:50:11,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:50:11,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 07:50:11,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:50:11,975 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 [2021-11-20 07:50:12,076 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 07:50:12,076 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 [2021-11-20 07:50:12,366 INFO L354 Elim1Store]: treesize reduction 20, result has 28.6 percent of original size [2021-11-20 07:50:12,366 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 41 treesize of output 44 [2021-11-20 07:50:12,501 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:50:12,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:50:15,008 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:50:15,008 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:50:15,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [44961566] [2021-11-20 07:50:15,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [44961566] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:50:15,008 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:50:15,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-11-20 07:50:15,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674326545] [2021-11-20 07:50:15,008 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:50:15,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 07:50:15,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:50:15,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 07:50:15,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=170, Unknown=1, NotChecked=0, Total=210 [2021-11-20 07:50:15,010 INFO L87 Difference]: Start difference. First operand 559 states and 765 transitions. Second operand has 15 states, 14 states have (on average 3.142857142857143) internal successors, (44), 12 states have internal predecessors, (44), 4 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:50:19,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:50:19,164 INFO L93 Difference]: Finished difference Result 605 states and 809 transitions. [2021-11-20 07:50:19,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:50:19,166 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.142857142857143) internal successors, (44), 12 states have internal predecessors, (44), 4 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 38 [2021-11-20 07:50:19,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:50:19,168 INFO L225 Difference]: With dead ends: 605 [2021-11-20 07:50:19,169 INFO L226 Difference]: Without dead ends: 605 [2021-11-20 07:50:19,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 8 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=43, Invalid=196, Unknown=1, NotChecked=0, Total=240 [2021-11-20 07:50:19,169 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 529 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 1355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 534 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:50:19,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 1419 Invalid, 1355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 749 Invalid, 0 Unknown, 534 Unchecked, 2.1s Time] [2021-11-20 07:50:19,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-11-20 07:50:19,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 560. [2021-11-20 07:50:19,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 395 states have (on average 1.729113924050633) internal successors, (683), 507 states have internal predecessors, (683), 34 states have call successors, (34), 22 states have call predecessors, (34), 28 states have return successors, (49), 36 states have call predecessors, (49), 34 states have call successors, (49) [2021-11-20 07:50:19,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 766 transitions. [2021-11-20 07:50:19,179 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 766 transitions. Word has length 38 [2021-11-20 07:50:19,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:50:19,180 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 766 transitions. [2021-11-20 07:50:19,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.142857142857143) internal successors, (44), 12 states have internal predecessors, (44), 4 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:50:19,180 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 766 transitions. [2021-11-20 07:50:19,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 07:50:19,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:50:19,181 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:50:19,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-20 07:50:19,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:50:19,392 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr103ASSERT_VIOLATIONMEMORY_LEAK === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:50:19,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:50:19,393 INFO L85 PathProgramCache]: Analyzing trace with hash -183877918, now seen corresponding path program 1 times [2021-11-20 07:50:19,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:50:19,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1619704006] [2021-11-20 07:50:19,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:50:19,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:50:19,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:50:19,394 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:50:19,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-20 07:50:19,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:50:19,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 07:50:19,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:50:22,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 07:50:22,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:50:22,496 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 11 [2021-11-20 07:50:27,171 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ldv_malloc_#res.base_388| (_ BitVec 32)) (|v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_11| (Array (_ BitVec 32) (_ BitVec 1))) (|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_44| (_ BitVec 32))) (let ((.cse1 (store |c_#valid| |v_ldv_malloc_#res.base_388| (_ bv0 1)))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ldv_malloc_#res.base_388|))) (exists ((|v_ULTIMATE.start_entry_point_#t~ret66#1.base_121| (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret66#1.base_121| (_ bv0 1)))) (and (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select .cse0 |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_44|))))) (_ bv1 1))) (= |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_44| (_ bv0 32))) (not (= (store .cse0 |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_44| (_ bv0 1)) |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_11|)) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret66#1.base_121|))))))))) (and (not (= |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_44| (_ bv0 32))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_44|))))))))) (_ bv1 1))))) (= (store .cse1 |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_44| (_ bv0 1)) |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_11|)))) is different from false [2021-11-20 07:50:44,824 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_12| (Array (_ BitVec 32) (_ BitVec 1))) (|v_ULTIMATE.start_entry_point_#t~ret66#1.base_121| (_ BitVec 32)) (|v_ldv_malloc_#res.base_392| (_ BitVec 32))) (let ((.cse0 (store |c_#valid| |v_ldv_malloc_#res.base_392| (_ bv1 1)))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ldv_malloc_#res.base_392|))) (= (store (store .cse0 |v_ULTIMATE.start_entry_point_#t~ret66#1.base_121| (_ bv0 1)) |v_ldv_malloc_#res.base_392| (_ bv0 1)) |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_12|) (= |v_ldv_malloc_#res.base_392| (_ bv0 32)) (exists ((|v_ULTIMATE.start_entry_point_#t~ret65#1.base_128| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_#t~ret66#1.base_121| (_ BitVec 32))) (let ((.cse1 (store |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret65#1.base_128| (_ bv1 1)))) (and (= (_ bv0 1) (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_entry_point_#t~ret66#1.base_121|)))) (not (= (store (store .cse1 |v_ULTIMATE.start_entry_point_#t~ret66#1.base_121| (_ bv0 1)) |v_ULTIMATE.start_entry_point_#t~ret65#1.base_128| (_ bv0 1)) |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_12|)) (not (= |v_ULTIMATE.start_entry_point_#t~ret65#1.base_128| (_ bv0 32))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret65#1.base_128|))))))))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select .cse0 |v_ULTIMATE.start_entry_point_#t~ret66#1.base_121|))))))))) is different from false [2021-11-20 07:50:45,017 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 4 times theorem prover too weak. 0 trivial. 6 not checked. [2021-11-20 07:50:45,017 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:50:45,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1619704006] [2021-11-20 07:50:45,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1619704006] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:50:45,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:50:45,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-11-20 07:50:45,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11981989] [2021-11-20 07:50:45,018 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:50:45,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 07:50:45,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:50:45,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 07:50:45,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=343, Unknown=25, NotChecked=78, Total=506 [2021-11-20 07:50:45,019 INFO L87 Difference]: Start difference. First operand 560 states and 766 transitions. Second operand has 23 states, 21 states have (on average 3.0) internal successors, (63), 19 states have internal predecessors, (63), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:50:47,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:50:47,757 INFO L93 Difference]: Finished difference Result 565 states and 770 transitions. [2021-11-20 07:50:47,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:50:47,759 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.0) internal successors, (63), 19 states have internal predecessors, (63), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 39 [2021-11-20 07:50:47,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:50:47,761 INFO L225 Difference]: With dead ends: 565 [2021-11-20 07:50:47,761 INFO L226 Difference]: Without dead ends: 546 [2021-11-20 07:50:47,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=73, Invalid=416, Unknown=25, NotChecked=86, Total=600 [2021-11-20 07:50:47,762 INFO L933 BasicCegarLoop]: 306 mSDtfsCounter, 50 mSDsluCounter, 2385 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 2691 SdHoareTripleChecker+Invalid, 2109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1161 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:50:47,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 2691 Invalid, 2109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 930 Invalid, 0 Unknown, 1161 Unchecked, 2.5s Time] [2021-11-20 07:50:47,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-11-20 07:50:47,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2021-11-20 07:50:47,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 380 states have (on average 1.7552631578947369) internal successors, (667), 492 states have internal predecessors, (667), 34 states have call successors, (34), 22 states have call predecessors, (34), 27 states have return successors, (48), 35 states have call predecessors, (48), 34 states have call successors, (48) [2021-11-20 07:50:47,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 749 transitions. [2021-11-20 07:50:47,775 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 749 transitions. Word has length 39 [2021-11-20 07:50:47,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:50:47,775 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 749 transitions. [2021-11-20 07:50:47,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.0) internal successors, (63), 19 states have internal predecessors, (63), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:50:47,775 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 749 transitions. [2021-11-20 07:50:47,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 07:50:47,776 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:50:47,776 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 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] [2021-11-20 07:50:47,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-20 07:50:47,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:50:47,983 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:50:47,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:50:47,983 INFO L85 PathProgramCache]: Analyzing trace with hash -789046789, now seen corresponding path program 1 times [2021-11-20 07:50:47,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:50:47,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [492238864] [2021-11-20 07:50:47,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:50:47,984 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:50:47,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:50:47,985 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:50:47,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-20 07:50:48,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:50:48,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:50:48,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:50:48,207 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 07:50:48,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:50:48,316 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 07:50:48,317 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:50:48,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [492238864] [2021-11-20 07:50:48,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [492238864] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:50:48,317 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:50:48,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-20 07:50:48,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164427863] [2021-11-20 07:50:48,318 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:50:48,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:50:48,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:50:48,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:50:48,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:50:48,319 INFO L87 Difference]: Start difference. First operand 544 states and 749 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-20 07:50:48,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:50:48,357 INFO L93 Difference]: Finished difference Result 515 states and 641 transitions. [2021-11-20 07:50:48,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:50:48,358 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 41 [2021-11-20 07:50:48,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:50:48,360 INFO L225 Difference]: With dead ends: 515 [2021-11-20 07:50:48,360 INFO L226 Difference]: Without dead ends: 515 [2021-11-20 07:50:48,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:50:48,361 INFO L933 BasicCegarLoop]: 375 mSDtfsCounter, 54 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 1440 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:50:48,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 1440 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:50:48,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-11-20 07:50:48,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 459. [2021-11-20 07:50:48,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 305 states have (on average 1.7114754098360656) internal successors, (522), 417 states have internal predecessors, (522), 25 states have call successors, (25), 18 states have call predecessors, (25), 23 states have return successors, (35), 27 states have call predecessors, (35), 25 states have call successors, (35) [2021-11-20 07:50:48,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 582 transitions. [2021-11-20 07:50:48,375 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 582 transitions. Word has length 41 [2021-11-20 07:50:48,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:50:48,378 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 582 transitions. [2021-11-20 07:50:48,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-20 07:50:48,378 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 582 transitions. [2021-11-20 07:50:48,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 07:50:48,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:50:48,378 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 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] [2021-11-20 07:50:48,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-20 07:50:48,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:50:48,579 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr77ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:50:48,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:50:48,580 INFO L85 PathProgramCache]: Analyzing trace with hash -789046589, now seen corresponding path program 1 times [2021-11-20 07:50:48,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:50:48,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521125233] [2021-11-20 07:50:48,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:50:48,580 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:50:48,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:50:48,581 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:50:48,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-20 07:50:48,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:50:48,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 07:50:48,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:50:48,748 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 07:50:48,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:50:48,835 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 07:50:48,835 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:50:48,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521125233] [2021-11-20 07:50:48,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [521125233] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:50:48,835 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:50:48,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-11-20 07:50:48,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145020093] [2021-11-20 07:50:48,836 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:50:48,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:50:48,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:50:48,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:50:48,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:50:48,836 INFO L87 Difference]: Start difference. First operand 459 states and 582 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:50:48,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:50:48,864 INFO L93 Difference]: Finished difference Result 458 states and 581 transitions. [2021-11-20 07:50:48,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:50:48,865 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2021-11-20 07:50:48,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:50:48,867 INFO L225 Difference]: With dead ends: 458 [2021-11-20 07:50:48,867 INFO L226 Difference]: Without dead ends: 458 [2021-11-20 07:50:48,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:50:48,867 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 233 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 1050 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:50:48,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 1050 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:50:48,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-11-20 07:50:48,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 458. [2021-11-20 07:50:48,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 305 states have (on average 1.7081967213114755) internal successors, (521), 416 states have internal predecessors, (521), 25 states have call successors, (25), 18 states have call predecessors, (25), 23 states have return successors, (35), 27 states have call predecessors, (35), 25 states have call successors, (35) [2021-11-20 07:50:48,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 581 transitions. [2021-11-20 07:50:48,876 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 581 transitions. Word has length 41 [2021-11-20 07:50:48,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:50:48,877 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 581 transitions. [2021-11-20 07:50:48,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:50:48,877 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 581 transitions. [2021-11-20 07:50:48,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 07:50:48,878 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:50:48,878 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-20 07:50:48,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-11-20 07:50:49,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:50:49,083 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:50:49,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:50:49,083 INFO L85 PathProgramCache]: Analyzing trace with hash -817675940, now seen corresponding path program 1 times [2021-11-20 07:50:49,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:50:49,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [400651654] [2021-11-20 07:50:49,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:50:49,084 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:50:49,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:50:49,085 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:50:49,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-20 07:50:49,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:50:49,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 07:50:49,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:50:49,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:50:49,339 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-20 07:50:49,339 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 [2021-11-20 07:50:49,355 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 07:50:49,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:50:49,524 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 07:50:49,524 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:50:49,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [400651654] [2021-11-20 07:50:49,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [400651654] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:50:49,524 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:50:49,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 3] imperfect sequences [] total 6 [2021-11-20 07:50:49,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672049811] [2021-11-20 07:50:49,524 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:50:49,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:50:49,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:50:49,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:50:49,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:50:49,525 INFO L87 Difference]: Start difference. First operand 458 states and 581 transitions. Second operand has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 07:50:49,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:50:49,788 INFO L93 Difference]: Finished difference Result 506 states and 643 transitions. [2021-11-20 07:50:49,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:50:49,789 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 41 [2021-11-20 07:50:49,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:50:49,791 INFO L225 Difference]: With dead ends: 506 [2021-11-20 07:50:49,791 INFO L226 Difference]: Without dead ends: 506 [2021-11-20 07:50:49,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:50:49,792 INFO L933 BasicCegarLoop]: 384 mSDtfsCounter, 98 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 1071 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 357 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:50:49,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 1071 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 119 Invalid, 0 Unknown, 357 Unchecked, 0.3s Time] [2021-11-20 07:50:49,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-11-20 07:50:49,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 457. [2021-11-20 07:50:49,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 305 states have (on average 1.7049180327868851) internal successors, (520), 415 states have internal predecessors, (520), 25 states have call successors, (25), 18 states have call predecessors, (25), 23 states have return successors, (35), 27 states have call predecessors, (35), 25 states have call successors, (35) [2021-11-20 07:50:49,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 580 transitions. [2021-11-20 07:50:49,799 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 580 transitions. Word has length 41 [2021-11-20 07:50:49,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:50:49,799 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 580 transitions. [2021-11-20 07:50:49,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 07:50:49,799 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 580 transitions. [2021-11-20 07:50:49,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 07:50:49,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:50:49,800 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-20 07:50:49,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-11-20 07:50:50,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:50:50,011 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:50:50,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:50:50,011 INFO L85 PathProgramCache]: Analyzing trace with hash -817675939, now seen corresponding path program 1 times [2021-11-20 07:50:50,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:50:50,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [359864104] [2021-11-20 07:50:50,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:50:50,012 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:50:50,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:50:50,013 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:50:50,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-20 07:50:50,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:50:50,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 07:50:50,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:50:50,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:50:52,400 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:50:52,400 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 31 treesize of output 33 [2021-11-20 07:50:52,412 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:50:52,412 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 25 treesize of output 25 [2021-11-20 07:50:52,472 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 07:50:52,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:50:58,681 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_48| (_ BitVec 32)) (|v_ldv_malloc_#res.base_444| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_15| (_ BitVec 32))) (or (and (forall ((ldv_malloc_~size (_ BitVec 32))) (bvule (bvadd (_ bv16 32) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_15|) (select (store |c_#length| |v_ldv_malloc_#res.base_444| ldv_malloc_~size) |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_48|))) (bvule (bvadd (_ bv12 32) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_15|) (bvadd (_ bv16 32) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_15|))) (exists ((|v_ldv_malloc_#res.base_443| (_ BitVec 32))) (and (or (not (bvule (bvadd (_ bv12 32) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_15|) (bvadd (_ bv16 32) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_15|))) (exists ((v_ldv_malloc_~size_418 (_ BitVec 32))) (not (bvule (bvadd (_ bv16 32) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_15|) (select (store |c_old(#length)| |v_ldv_malloc_#res.base_443| v_ldv_malloc_~size_418) |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_48|))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_443|))))))))))) (not (= (_ bv0 1) (select |c_#valid| |v_ldv_malloc_#res.base_444|))))) is different from true [2021-11-20 07:50:59,347 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 07:50:59,347 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 43 treesize of output 42 [2021-11-20 07:51:03,997 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 88 treesize of output 84 [2021-11-20 07:51:04,878 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 07:51:04,878 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:51:04,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [359864104] [2021-11-20 07:51:04,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [359864104] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:51:04,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:51:04,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-11-20 07:51:04,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851986976] [2021-11-20 07:51:04,878 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:51:04,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 07:51:04,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:51:04,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 07:51:04,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=192, Unknown=5, NotChecked=28, Total=272 [2021-11-20 07:51:04,879 INFO L87 Difference]: Start difference. First operand 457 states and 580 transitions. Second operand has 17 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 15 states have internal predecessors, (43), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-20 07:51:16,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:51:16,998 INFO L93 Difference]: Finished difference Result 639 states and 734 transitions. [2021-11-20 07:51:17,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:51:17,000 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 15 states have internal predecessors, (43), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) Word has length 41 [2021-11-20 07:51:17,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:51:17,004 INFO L225 Difference]: With dead ends: 639 [2021-11-20 07:51:17,004 INFO L226 Difference]: Without dead ends: 639 [2021-11-20 07:51:17,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=58, Invalid=244, Unknown=8, NotChecked=32, Total=342 [2021-11-20 07:51:17,005 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 701 mSDsluCounter, 2293 mSDsCounter, 0 mSdLazyCounter, 1426 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 2581 SdHoareTripleChecker+Invalid, 2725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1240 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:51:17,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [711 Valid, 2581 Invalid, 2725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1426 Invalid, 0 Unknown, 1240 Unchecked, 5.9s Time] [2021-11-20 07:51:17,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2021-11-20 07:51:17,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 456. [2021-11-20 07:51:17,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 305 states have (on average 1.701639344262295) internal successors, (519), 414 states have internal predecessors, (519), 25 states have call successors, (25), 18 states have call predecessors, (25), 23 states have return successors, (35), 27 states have call predecessors, (35), 25 states have call successors, (35) [2021-11-20 07:51:17,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 579 transitions. [2021-11-20 07:51:17,014 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 579 transitions. Word has length 41 [2021-11-20 07:51:17,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:51:17,015 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 579 transitions. [2021-11-20 07:51:17,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 15 states have internal predecessors, (43), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-20 07:51:17,015 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 579 transitions. [2021-11-20 07:51:17,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 07:51:17,015 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:51:17,016 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:51:17,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-11-20 07:51:17,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:51:17,229 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr88ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:51:17,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:51:17,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1368793298, now seen corresponding path program 1 times [2021-11-20 07:51:17,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:51:17,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1504556202] [2021-11-20 07:51:17,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:51:17,230 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:51:17,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:51:17,231 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:51:17,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-20 07:51:17,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:51:17,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-20 07:51:17,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:51:17,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:51:17,528 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 07:51:17,528 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 29 treesize of output 36 [2021-11-20 07:51:17,780 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-11-20 07:51:17,781 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 36 treesize of output 53 [2021-11-20 07:51:18,460 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-11-20 07:51:18,461 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 54 treesize of output 63 [2021-11-20 07:51:18,767 INFO L354 Elim1Store]: treesize reduction 46, result has 27.0 percent of original size [2021-11-20 07:51:18,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 62 treesize of output 71 [2021-11-20 07:51:19,001 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:51:19,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:51:51,724 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ldv_malloc_#res.base_469| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_#t~ret67#1.base_100| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_54| (_ BitVec 32))) (let ((.cse0 (store |c_#valid| |v_ldv_malloc_#res.base_469| (_ bv1 1)))) (or (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select .cse0 |v_ULTIMATE.start_entry_point_#t~ret67#1.base_100|))))))) (not (= (_ bv0 1) (select |c_#valid| |v_ldv_malloc_#res.base_469|))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store (store .cse0 |v_ULTIMATE.start_entry_point_#t~ret67#1.base_100| (_ bv0 1)) |v_ldv_malloc_#res.base_469| (_ bv0 1)) |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_54|)))))))))))) (_ bv1 1))) (not (= (_ bv0 1) (bvadd (bvneg (select .cse0 |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_54|)) (_ bv1 1)))) (exists ((|v_ULTIMATE.start_entry_point_#t~ret67#1.base_100| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_#t~ret66#1.base_132| (_ BitVec 32))) (let ((.cse1 (store |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret66#1.base_132| (_ bv1 1)))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_54|))) (_ bv1 1))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret66#1.base_132|)))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store (store .cse1 |v_ULTIMATE.start_entry_point_#t~ret67#1.base_100| (_ bv0 1)) |v_ULTIMATE.start_entry_point_#t~ret66#1.base_132| (_ bv0 1)) |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_54|))))))))))))) (_ bv1 1)))) (= (_ bv0 1) (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_entry_point_#t~ret67#1.base_100|)))))))))) is different from false [2021-11-20 07:52:04,195 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 10 refuted. 2 times theorem prover too weak. 0 trivial. 4 not checked. [2021-11-20 07:52:04,195 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:52:04,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1504556202] [2021-11-20 07:52:04,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1504556202] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:52:04,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:52:04,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-11-20 07:52:04,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695260612] [2021-11-20 07:52:04,196 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:52:04,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 07:52:04,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:52:04,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 07:52:04,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=526, Unknown=16, NotChecked=48, Total=702 [2021-11-20 07:52:04,197 INFO L87 Difference]: Start difference. First operand 456 states and 579 transitions. Second operand has 27 states, 25 states have (on average 2.36) internal successors, (59), 21 states have internal predecessors, (59), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-11-20 07:52:06,224 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_old(#valid)| |c_#valid|) (forall ((|v_ldv_malloc_#res.base_469| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_#t~ret67#1.base_100| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_54| (_ BitVec 32))) (let ((.cse0 (store |c_#valid| |v_ldv_malloc_#res.base_469| (_ bv1 1)))) (or (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select .cse0 |v_ULTIMATE.start_entry_point_#t~ret67#1.base_100|))))))) (not (= (_ bv0 1) (select |c_#valid| |v_ldv_malloc_#res.base_469|))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store (store .cse0 |v_ULTIMATE.start_entry_point_#t~ret67#1.base_100| (_ bv0 1)) |v_ldv_malloc_#res.base_469| (_ bv0 1)) |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_54|)))))))))))) (_ bv1 1))) (not (= (_ bv0 1) (bvadd (bvneg (select .cse0 |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_54|)) (_ bv1 1)))) (exists ((|v_ULTIMATE.start_entry_point_#t~ret67#1.base_100| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_#t~ret66#1.base_132| (_ BitVec 32))) (let ((.cse1 (store |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret66#1.base_132| (_ bv1 1)))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_54|))) (_ bv1 1))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret66#1.base_132|)))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store (store .cse1 |v_ULTIMATE.start_entry_point_#t~ret67#1.base_100| (_ bv0 1)) |v_ULTIMATE.start_entry_point_#t~ret66#1.base_132| (_ bv0 1)) |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_54|))))))))))))) (_ bv1 1)))) (= (_ bv0 1) (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_entry_point_#t~ret67#1.base_100|))))))))))) is different from false [2021-11-20 07:52:06,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:52:06,597 INFO L93 Difference]: Finished difference Result 459 states and 582 transitions. [2021-11-20 07:52:06,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:52:06,598 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.36) internal successors, (59), 21 states have internal predecessors, (59), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 41 [2021-11-20 07:52:06,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:52:06,600 INFO L225 Difference]: With dead ends: 459 [2021-11-20 07:52:06,600 INFO L226 Difference]: Without dead ends: 459 [2021-11-20 07:52:06,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 46.5s TimeCoverageRelationStatistics Valid=114, Invalid=527, Unknown=17, NotChecked=98, Total=756 [2021-11-20 07:52:06,601 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 21 mSDsluCounter, 2075 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 2392 SdHoareTripleChecker+Invalid, 1403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1261 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:52:06,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 2392 Invalid, 1403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 141 Invalid, 0 Unknown, 1261 Unchecked, 0.4s Time] [2021-11-20 07:52:06,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-11-20 07:52:06,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 459. [2021-11-20 07:52:06,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 308 states have (on average 1.6948051948051948) internal successors, (522), 417 states have internal predecessors, (522), 25 states have call successors, (25), 18 states have call predecessors, (25), 23 states have return successors, (35), 27 states have call predecessors, (35), 25 states have call successors, (35) [2021-11-20 07:52:06,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 582 transitions. [2021-11-20 07:52:06,609 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 582 transitions. Word has length 41 [2021-11-20 07:52:06,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:52:06,610 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 582 transitions. [2021-11-20 07:52:06,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.36) internal successors, (59), 21 states have internal predecessors, (59), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-11-20 07:52:06,610 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 582 transitions. [2021-11-20 07:52:06,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 07:52:06,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:52:06,610 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:52:06,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-11-20 07:52:06,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:52:06,822 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr78ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:52:06,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:52:06,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1309359926, now seen corresponding path program 1 times [2021-11-20 07:52:06,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:52:06,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [330143810] [2021-11-20 07:52:06,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:52:06,823 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:52:06,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:52:06,824 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:52:06,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-11-20 07:52:06,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:52:06,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:52:06,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:52:07,480 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 07:52:07,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:52:07,682 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 07:52:07,683 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:52:07,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [330143810] [2021-11-20 07:52:07,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [330143810] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:52:07,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:52:07,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-11-20 07:52:07,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942131352] [2021-11-20 07:52:07,684 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:52:07,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 07:52:07,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:52:07,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 07:52:07,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:52:07,685 INFO L87 Difference]: Start difference. First operand 459 states and 582 transitions. Second operand has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-20 07:52:08,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:52:08,013 INFO L93 Difference]: Finished difference Result 555 states and 694 transitions. [2021-11-20 07:52:08,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:52:08,014 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 42 [2021-11-20 07:52:08,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:52:08,016 INFO L225 Difference]: With dead ends: 555 [2021-11-20 07:52:08,016 INFO L226 Difference]: Without dead ends: 555 [2021-11-20 07:52:08,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:52:08,017 INFO L933 BasicCegarLoop]: 454 mSDtfsCounter, 135 mSDsluCounter, 2660 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 3114 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 214 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:52:08,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 3114 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 152 Invalid, 0 Unknown, 214 Unchecked, 0.3s Time] [2021-11-20 07:52:08,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-11-20 07:52:08,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 461. [2021-11-20 07:52:08,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 310 states have (on average 1.6903225806451614) internal successors, (524), 419 states have internal predecessors, (524), 25 states have call successors, (25), 18 states have call predecessors, (25), 23 states have return successors, (35), 27 states have call predecessors, (35), 25 states have call successors, (35) [2021-11-20 07:52:08,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 584 transitions. [2021-11-20 07:52:08,024 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 584 transitions. Word has length 42 [2021-11-20 07:52:08,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:52:08,024 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 584 transitions. [2021-11-20 07:52:08,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-20 07:52:08,025 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 584 transitions. [2021-11-20 07:52:08,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 07:52:08,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:52:08,025 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-20 07:52:08,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-11-20 07:52:08,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:52:08,227 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:52:08,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:52:08,227 INFO L85 PathProgramCache]: Analyzing trace with hash 421849722, now seen corresponding path program 1 times [2021-11-20 07:52:08,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:52:08,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1903387848] [2021-11-20 07:52:08,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:52:08,228 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:52:08,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:52:08,229 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:52:08,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-11-20 07:52:08,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:52:08,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 07:52:08,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:52:08,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:52:08,414 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 07:52:08,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:52:08,523 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 07:52:08,523 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:52:08,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1903387848] [2021-11-20 07:52:08,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1903387848] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:52:08,523 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:52:08,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-20 07:52:08,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550341810] [2021-11-20 07:52:08,523 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:52:08,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:52:08,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:52:08,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:52:08,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:52:08,524 INFO L87 Difference]: Start difference. First operand 461 states and 584 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-20 07:52:09,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:52:09,243 INFO L93 Difference]: Finished difference Result 464 states and 587 transitions. [2021-11-20 07:52:09,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:52:09,244 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 42 [2021-11-20 07:52:09,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:52:09,247 INFO L225 Difference]: With dead ends: 464 [2021-11-20 07:52:09,247 INFO L226 Difference]: Without dead ends: 464 [2021-11-20 07:52:09,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:52:09,247 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 14 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:52:09,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 945 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 07:52:09,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-11-20 07:52:09,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 460. [2021-11-20 07:52:09,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 310 states have (on average 1.6870967741935483) internal successors, (523), 418 states have internal predecessors, (523), 25 states have call successors, (25), 18 states have call predecessors, (25), 23 states have return successors, (35), 27 states have call predecessors, (35), 25 states have call successors, (35) [2021-11-20 07:52:09,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 583 transitions. [2021-11-20 07:52:09,256 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 583 transitions. Word has length 42 [2021-11-20 07:52:09,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:52:09,256 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 583 transitions. [2021-11-20 07:52:09,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-20 07:52:09,256 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 583 transitions. [2021-11-20 07:52:09,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 07:52:09,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:52:09,257 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-20 07:52:09,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-11-20 07:52:09,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:52:09,462 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:52:09,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:52:09,470 INFO L85 PathProgramCache]: Analyzing trace with hash 421849723, now seen corresponding path program 1 times [2021-11-20 07:52:09,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:52:09,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1044304313] [2021-11-20 07:52:09,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:52:09,471 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:52:09,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:52:09,471 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:52:09,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-11-20 07:52:09,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:52:09,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 07:52:09,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:52:09,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:52:09,724 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 07:52:09,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:52:10,108 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 07:52:10,108 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:52:10,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1044304313] [2021-11-20 07:52:10,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1044304313] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:52:10,109 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:52:10,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-20 07:52:10,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990166936] [2021-11-20 07:52:10,109 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:52:10,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 07:52:10,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:52:10,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 07:52:10,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:52:10,110 INFO L87 Difference]: Start difference. First operand 460 states and 583 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 1 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 07:52:12,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:52:12,632 INFO L93 Difference]: Finished difference Result 517 states and 645 transitions. [2021-11-20 07:52:12,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:52:12,634 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 1 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 42 [2021-11-20 07:52:12,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:52:12,636 INFO L225 Difference]: With dead ends: 517 [2021-11-20 07:52:12,636 INFO L226 Difference]: Without dead ends: 517 [2021-11-20 07:52:12,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:52:12,637 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 110 mSDsluCounter, 1674 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 2026 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:52:12,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 2026 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 07:52:12,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-11-20 07:52:12,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 459. [2021-11-20 07:52:12,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 310 states have (on average 1.6838709677419355) internal successors, (522), 417 states have internal predecessors, (522), 25 states have call successors, (25), 18 states have call predecessors, (25), 23 states have return successors, (35), 27 states have call predecessors, (35), 25 states have call successors, (35) [2021-11-20 07:52:12,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 582 transitions. [2021-11-20 07:52:12,646 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 582 transitions. Word has length 42 [2021-11-20 07:52:12,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:52:12,646 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 582 transitions. [2021-11-20 07:52:12,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 1 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 07:52:12,647 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 582 transitions. [2021-11-20 07:52:12,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 07:52:12,647 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:52:12,648 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:52:12,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2021-11-20 07:52:12,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:52:12,859 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr79ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:52:12,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:52:12,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1935452453, now seen corresponding path program 1 times [2021-11-20 07:52:12,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:52:12,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1858160131] [2021-11-20 07:52:12,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:52:12,860 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:52:12,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:52:12,861 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:52:12,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-11-20 07:52:12,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:52:12,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 07:52:12,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:52:12,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 07:52:13,068 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 07:52:13,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:52:13,249 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 07:52:13,249 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:52:13,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1858160131] [2021-11-20 07:52:13,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1858160131] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:52:13,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:52:13,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-20 07:52:13,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460216113] [2021-11-20 07:52:13,250 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:52:13,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:52:13,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:52:13,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:52:13,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:52:13,251 INFO L87 Difference]: Start difference. First operand 459 states and 582 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 07:52:14,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:52:14,666 INFO L93 Difference]: Finished difference Result 464 states and 587 transitions. [2021-11-20 07:52:14,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:52:14,667 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2021-11-20 07:52:14,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:52:14,670 INFO L225 Difference]: With dead ends: 464 [2021-11-20 07:52:14,671 INFO L226 Difference]: Without dead ends: 464 [2021-11-20 07:52:14,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:52:14,671 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 41 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:52:14,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 1160 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 598 Invalid, 0 Unknown, 119 Unchecked, 1.4s Time] [2021-11-20 07:52:14,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-11-20 07:52:14,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 462. [2021-11-20 07:52:14,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 313 states have (on average 1.6773162939297124) internal successors, (525), 420 states have internal predecessors, (525), 25 states have call successors, (25), 18 states have call predecessors, (25), 23 states have return successors, (35), 27 states have call predecessors, (35), 25 states have call successors, (35) [2021-11-20 07:52:14,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 585 transitions. [2021-11-20 07:52:14,682 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 585 transitions. Word has length 43 [2021-11-20 07:52:14,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:52:14,682 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 585 transitions. [2021-11-20 07:52:14,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 07:52:14,683 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 585 transitions. [2021-11-20 07:52:14,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 07:52:14,683 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:52:14,684 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:52:14,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2021-11-20 07:52:14,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:52:14,887 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr79ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:52:14,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:52:14,887 INFO L85 PathProgramCache]: Analyzing trace with hash 192642118, now seen corresponding path program 1 times [2021-11-20 07:52:14,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:52:14,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1596819284] [2021-11-20 07:52:14,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:52:14,888 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:52:14,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:52:14,889 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:52:14,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-11-20 07:52:14,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:52:14,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 07:52:14,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:52:15,076 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 07:52:15,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:52:15,167 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 07:52:15,167 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:52:15,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1596819284] [2021-11-20 07:52:15,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1596819284] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:52:15,168 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:52:15,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-20 07:52:15,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812052989] [2021-11-20 07:52:15,168 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:52:15,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:52:15,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:52:15,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:52:15,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:52:15,169 INFO L87 Difference]: Start difference. First operand 462 states and 585 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-20 07:52:15,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:52:15,213 INFO L93 Difference]: Finished difference Result 510 states and 635 transitions. [2021-11-20 07:52:15,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:52:15,214 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 43 [2021-11-20 07:52:15,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:52:15,217 INFO L225 Difference]: With dead ends: 510 [2021-11-20 07:52:15,217 INFO L226 Difference]: Without dead ends: 510 [2021-11-20 07:52:15,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:52:15,218 INFO L933 BasicCegarLoop]: 376 mSDtfsCounter, 228 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 1262 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:52:15,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 1262 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:52:15,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-11-20 07:52:15,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 460. [2021-11-20 07:52:15,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 311 states have (on average 1.6784565916398715) internal successors, (522), 418 states have internal predecessors, (522), 25 states have call successors, (25), 18 states have call predecessors, (25), 23 states have return successors, (35), 27 states have call predecessors, (35), 25 states have call successors, (35) [2021-11-20 07:52:15,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 582 transitions. [2021-11-20 07:52:15,226 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 582 transitions. Word has length 43 [2021-11-20 07:52:15,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:52:15,226 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 582 transitions. [2021-11-20 07:52:15,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-20 07:52:15,227 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 582 transitions. [2021-11-20 07:52:15,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 07:52:15,227 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:52:15,227 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:52:15,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2021-11-20 07:52:15,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:52:15,431 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:52:15,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:52:15,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1150380693, now seen corresponding path program 1 times [2021-11-20 07:52:15,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:52:15,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1075385667] [2021-11-20 07:52:15,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:52:15,432 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:52:15,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:52:15,432 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:52:15,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-11-20 07:52:15,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:52:15,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-20 07:52:15,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:52:15,659 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 07:52:15,659 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 [2021-11-20 07:52:15,883 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-11-20 07:52:15,884 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 59 [2021-11-20 07:52:16,327 INFO L354 Elim1Store]: treesize reduction 45, result has 45.1 percent of original size [2021-11-20 07:52:16,328 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 6 case distinctions, treesize of input 62 treesize of output 89 [2021-11-20 07:52:17,469 INFO L354 Elim1Store]: treesize reduction 57, result has 30.5 percent of original size [2021-11-20 07:52:17,470 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 6 case distinctions, treesize of input 85 treesize of output 100 [2021-11-20 07:52:17,903 INFO L354 Elim1Store]: treesize reduction 73, result has 25.5 percent of original size [2021-11-20 07:52:17,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 104 treesize of output 119 [2021-11-20 07:52:18,437 INFO L354 Elim1Store]: treesize reduction 73, result has 31.1 percent of original size [2021-11-20 07:52:18,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 107 treesize of output 130 [2021-11-20 07:52:18,889 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 07:52:18,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:52:29,403 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_59| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~cfg~2#1.base_BEFORE_CALL_28| (_ BitVec 32))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store (store (store |c_#valid| |c_ldv_malloc_#res.base| (_ bv0 1)) |v_ULTIMATE.start_entry_point_~cfg~2#1.base_BEFORE_CALL_28| (_ bv0 1)) |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_59| (_ bv0 1)) |c_~#ldv_global_msg_list~0.base|))))))) (_ bv1 1))) (exists ((|v_ULTIMATE.start_entry_point_#t~ret67#1.base_109| (_ BitVec 32))) (and (not (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select (store (store (store |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret67#1.base_109| (_ bv0 1)) |v_ULTIMATE.start_entry_point_~cfg~2#1.base_BEFORE_CALL_28| (_ bv0 1)) |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_59| (_ bv0 1)) |c_~#ldv_global_msg_list~0.base|))))))))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret67#1.base_109|))))))) is different from true [2021-11-20 07:55:22,485 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 14 times theorem prover too weak. 0 trivial. 6 not checked. [2021-11-20 07:55:22,486 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:55:22,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1075385667] [2021-11-20 07:55:22,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1075385667] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:55:22,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:55:22,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 29 [2021-11-20 07:55:22,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230652940] [2021-11-20 07:55:22,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:55:22,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-20 07:55:22,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:55:22,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-20 07:55:22,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=593, Unknown=81, NotChecked=56, Total=930 [2021-11-20 07:55:22,487 INFO L87 Difference]: Start difference. First operand 460 states and 582 transitions. Second operand has 31 states, 30 states have (on average 2.1) internal successors, (63), 24 states have internal predecessors, (63), 8 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 07:55:22,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:55:22,534 INFO L93 Difference]: Finished difference Result 462 states and 585 transitions. [2021-11-20 07:55:22,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:55:22,536 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.1) internal successors, (63), 24 states have internal predecessors, (63), 8 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 43 [2021-11-20 07:55:22,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:55:22,539 INFO L225 Difference]: With dead ends: 462 [2021-11-20 07:55:22,539 INFO L226 Difference]: Without dead ends: 462 [2021-11-20 07:55:22,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 51 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 182.9s TimeCoverageRelationStatistics Valid=200, Invalid=593, Unknown=81, NotChecked=56, Total=930 [2021-11-20 07:55:22,540 INFO L933 BasicCegarLoop]: 304 mSDtfsCounter, 39 mSDsluCounter, 1610 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 1914 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 778 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:55:22,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 1914 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 778 Unchecked, 0.0s Time] [2021-11-20 07:55:22,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-20 07:55:22,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 462. [2021-11-20 07:55:22,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 313 states have (on average 1.6773162939297124) internal successors, (525), 420 states have internal predecessors, (525), 25 states have call successors, (25), 18 states have call predecessors, (25), 23 states have return successors, (35), 27 states have call predecessors, (35), 25 states have call successors, (35) [2021-11-20 07:55:22,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 585 transitions. [2021-11-20 07:55:22,550 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 585 transitions. Word has length 43 [2021-11-20 07:55:22,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:55:22,550 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 585 transitions. [2021-11-20 07:55:22,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.1) internal successors, (63), 24 states have internal predecessors, (63), 8 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 07:55:22,551 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 585 transitions. [2021-11-20 07:55:22,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 07:55:22,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:55:22,552 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:55:22,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-11-20 07:55:22,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:55:22,763 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr90REQUIRES_VIOLATION === [ldv_msg_freeErr0REQUIRES_VIOLATION, ldv_msg_freeErr1REQUIRES_VIOLATION, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE, ldv_msg_freeErr3ASSERT_VIOLATIONMEMORY_FREE (and 120 more)] === [2021-11-20 07:55:22,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:55:22,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1150380694, now seen corresponding path program 1 times [2021-11-20 07:55:22,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:55:22,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1060267060] [2021-11-20 07:55:22,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:55:22,764 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:55:22,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:55:22,765 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:55:22,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19045116-8c13-4aef-a9f9-4fb3b95faee2/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-11-20 07:55:22,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:55:22,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-20 07:55:22,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:55:25,032 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:55:25,032 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 27 treesize of output 29 [2021-11-20 07:55:27,208 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:55:27,208 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 [2021-11-20 07:55:35,548 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:55:35,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-11-20 07:55:37,280 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 15 refuted. 4 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:55:37,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:55:50,880 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ldv_malloc_~size_554 (_ BitVec 32)) (|v_ldv_malloc_#res.base_577| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_#t~ret66#1.base_146| (_ BitVec 32)) (|v_ldv_malloc_#res.base_585| (_ BitVec 32)) (v_ldv_malloc_~size_550 (_ BitVec 32))) (let ((.cse0 (store (store (store |c_#length| |v_ldv_malloc_#res.base_585| v_ldv_malloc_~size_554) |v_ULTIMATE.start_entry_point_#t~ret66#1.base_146| v_ldv_malloc_~size_550) |v_ldv_malloc_#res.base_577| (_ bv4 32)))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ldv_malloc_#res.base_585|))) (not (bvule (_ bv4 32) (select .cse0 |v_ULTIMATE.start_entry_point_#t~ret66#1.base_146|))) (let ((.cse1 (bvadd (_ bv4 32) |c_~#ldv_global_msg_list~0.offset|))) (and (bvule .cse1 (select .cse0 |c_~#ldv_global_msg_list~0.base|)) (bvule |c_~#ldv_global_msg_list~0.offset| .cse1)))))) is different from false [2021-11-20 07:55:53,077 WARN L860 $PredicateComparison]: unable to prove that (or (forall ((|v_ldv_malloc_#res.base_577| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_#t~ret66#1.base_146| (_ BitVec 32)) (v_ldv_malloc_~size_550 (_ BitVec 32))) (let ((.cse0 (store (store |c_#length| |v_ULTIMATE.start_entry_point_#t~ret66#1.base_146| v_ldv_malloc_~size_550) |v_ldv_malloc_#res.base_577| (_ bv4 32)))) (or (not (bvule (_ bv4 32) (select .cse0 |v_ULTIMATE.start_entry_point_#t~ret66#1.base_146|))) (let ((.cse1 (bvadd (_ bv4 32) |c_~#ldv_global_msg_list~0.offset|))) (and (bvule .cse1 (select .cse0 |c_~#ldv_global_msg_list~0.base|)) (bvule |c_~#ldv_global_msg_list~0.offset| .cse1)))))) (exists ((v_ldv_malloc_~size_554 (_ BitVec 32)) (|v_ldv_malloc_#res.base_577| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_#t~ret66#1.base_146| (_ BitVec 32)) (|v_ldv_malloc_#res.base_585| (_ BitVec 32)) (v_ldv_malloc_~size_550 (_ BitVec 32))) (let ((.cse2 (store (store (store |c_old(#length)| |v_ldv_malloc_#res.base_585| v_ldv_malloc_~size_554) |v_ULTIMATE.start_entry_point_#t~ret66#1.base_146| v_ldv_malloc_~size_550) |v_ldv_malloc_#res.base_577| (_ bv4 32)))) (and (bvule (_ bv4 32) (select .cse2 |v_ULTIMATE.start_entry_point_#t~ret66#1.base_146|)) (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_585|))))) (let ((.cse3 (bvadd (_ bv4 32) |c_~#ldv_global_msg_list~0.offset|))) (or (not (bvule |c_~#ldv_global_msg_list~0.offset| .cse3)) (not (bvule .cse3 (select .cse2 |c_~#ldv_global_msg_list~0.base|))))))))) is different from true [2021-11-20 07:55:55,546 WARN L860 $PredicateComparison]: unable to prove that (or (forall ((|v_ldv_malloc_#res.base_577| (_ BitVec 32)) (|v_ldv_malloc_#res.base_586| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_#t~ret66#1.base_146| (_ BitVec 32)) (ldv_malloc_~size (_ BitVec 32)) (v_ldv_malloc_~size_550 (_ BitVec 32))) (let ((.cse1 (store (store (store |c_#length| |v_ldv_malloc_#res.base_586| ldv_malloc_~size) |v_ULTIMATE.start_entry_point_#t~ret66#1.base_146| v_ldv_malloc_~size_550) |v_ldv_malloc_#res.base_577| (_ bv4 32)))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ldv_malloc_#res.base_586|))) (let ((.cse0 (bvadd (_ bv4 32) |c_~#ldv_global_msg_list~0.offset|))) (and (bvule .cse0 (select .cse1 |c_~#ldv_global_msg_list~0.base|)) (bvule |c_~#ldv_global_msg_list~0.offset| .cse0))) (not (bvule (_ bv4 32) (select .cse1 |v_ULTIMATE.start_entry_point_#t~ret66#1.base_146|)))))) (exists ((v_ldv_malloc_~size_554 (_ BitVec 32)) (|v_ldv_malloc_#res.base_577| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_#t~ret66#1.base_146| (_ BitVec 32)) (|v_ldv_malloc_#res.base_585| (_ BitVec 32)) (v_ldv_malloc_~size_550 (_ BitVec 32))) (let ((.cse2 (store (store (store |c_old(#length)| |v_ldv_malloc_#res.base_585| v_ldv_malloc_~size_554) |v_ULTIMATE.start_entry_point_#t~ret66#1.base_146| v_ldv_malloc_~size_550) |v_ldv_malloc_#res.base_577| (_ bv4 32)))) (and (bvule (_ bv4 32) (select .cse2 |v_ULTIMATE.start_entry_point_#t~ret66#1.base_146|)) (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_585|))))) (let ((.cse3 (bvadd (_ bv4 32) |c_~#ldv_global_msg_list~0.offset|))) (or (not (bvule |c_~#ldv_global_msg_list~0.offset| .cse3)) (not (bvule .cse3 (select .cse2 |c_~#ldv_global_msg_list~0.base|))))))))) is different from true [2021-11-20 07:55:55,962 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 12 not checked. [2021-11-20 07:55:55,962 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:55:55,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1060267060] [2021-11-20 07:55:55,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1060267060] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:55:55,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:55:55,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 26 [2021-11-20 07:55:55,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357385449] [2021-11-20 07:55:55,963 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:55:55,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-20 07:55:55,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:55:55,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-20 07:55:55,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=472, Unknown=12, NotChecked=144, Total=756 [2021-11-20 07:55:55,964 INFO L87 Difference]: Start difference. First operand 462 states and 585 transitions. Second operand has 28 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 24 states have internal predecessors, (69), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)