./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.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_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/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_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/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_11e61959-5a56-4302-b63a-541ea1b4de73/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 7f08d75c904d21d6573220c7737d451cd978e8a22a153e855f8d685d88a1eb60 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:42:16,207 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:42:16,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:42:16,268 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:42:16,269 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:42:16,273 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:42:16,275 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:42:16,279 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:42:16,281 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:42:16,289 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:42:16,290 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:42:16,292 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:42:16,293 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:42:16,296 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:42:16,298 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:42:16,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:42:16,310 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:42:16,311 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:42:16,313 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:42:16,323 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:42:16,326 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:42:16,332 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:42:16,335 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:42:16,336 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:42:16,345 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:42:16,346 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:42:16,346 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:42:16,349 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:42:16,349 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:42:16,351 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:42:16,351 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:42:16,352 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:42:16,354 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:42:16,356 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:42:16,357 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:42:16,358 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:42:16,359 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:42:16,359 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:42:16,359 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:42:16,360 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:42:16,361 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:42:16,363 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-20 05:42:16,409 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:42:16,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:42:16,410 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:42:16,410 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:42:16,417 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:42:16,418 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:42:16,418 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:42:16,419 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:42:16,419 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:42:16,420 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:42:16,421 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 05:42:16,421 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 05:42:16,422 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 05:42:16,422 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 05:42:16,422 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:42:16,422 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 05:42:16,422 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 05:42:16,423 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 05:42:16,423 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:42:16,423 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 05:42:16,423 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 05:42:16,424 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:42:16,424 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:42:16,424 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:42:16,424 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:42:16,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:42:16,425 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:42:16,425 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:42:16,425 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 05:42:16,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 05:42:16,428 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:42:16,428 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_11e61959-5a56-4302-b63a-541ea1b4de73/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f08d75c904d21d6573220c7737d451cd978e8a22a153e855f8d685d88a1eb60 [2021-11-20 05:42:16,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:42:16,738 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:42:16,741 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:42:16,743 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:42:16,743 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:42:16,745 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i [2021-11-20 05:42:16,828 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/data/7bf152629/0645d7c1e43f4e1b99eecfd80e3cab2e/FLAG7609e55a6 [2021-11-20 05:42:17,516 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:42:17,516 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i [2021-11-20 05:42:17,536 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/data/7bf152629/0645d7c1e43f4e1b99eecfd80e3cab2e/FLAG7609e55a6 [2021-11-20 05:42:17,721 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/data/7bf152629/0645d7c1e43f4e1b99eecfd80e3cab2e [2021-11-20 05:42:17,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:42:17,725 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:42:17,727 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:42:17,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:42:17,731 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:42:17,732 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:42:17" (1/1) ... [2021-11-20 05:42:17,733 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59d1b36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:42:17, skipping insertion in model container [2021-11-20 05:42:17,733 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:42:17" (1/1) ... [2021-11-20 05:42:17,741 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:42:17,788 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:42:18,380 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:42:18,399 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 05:42:18,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6f6e3fb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:42:18, skipping insertion in model container [2021-11-20 05:42:18,400 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:42:18,400 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-20 05:42:18,403 INFO L158 Benchmark]: Toolchain (without parser) took 675.84ms. Allocated memory was 90.2MB in the beginning and 119.5MB in the end (delta: 29.4MB). Free memory was 52.7MB in the beginning and 90.0MB in the end (delta: -37.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 05:42:18,404 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 90.2MB. Free memory was 63.0MB in the beginning and 63.0MB in the end (delta: 27.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 05:42:18,405 INFO L158 Benchmark]: CACSL2BoogieTranslator took 673.17ms. Allocated memory was 90.2MB in the beginning and 119.5MB in the end (delta: 29.4MB). Free memory was 52.5MB in the beginning and 90.0MB in the end (delta: -37.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 05:42:18,407 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 was 63.0MB in the beginning and 63.0MB in the end (delta: 27.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 673.17ms. Allocated memory was 90.2MB in the beginning and 119.5MB in the end (delta: 29.4MB). Free memory was 52.5MB in the beginning and 90.0MB in the end (delta: -37.5MB). Peak memory consumption was 10.5MB. 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_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/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_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/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_11e61959-5a56-4302-b63a-541ea1b4de73/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 7f08d75c904d21d6573220c7737d451cd978e8a22a153e855f8d685d88a1eb60 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:42:20,844 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:42:20,846 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:42:20,889 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:42:20,890 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:42:20,891 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:42:20,893 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:42:20,896 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:42:20,899 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:42:20,900 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:42:20,902 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:42:20,904 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:42:20,904 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:42:20,906 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:42:20,908 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:42:20,909 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:42:20,911 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:42:20,912 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:42:20,915 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:42:20,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:42:20,920 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:42:20,922 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:42:20,923 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:42:20,924 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:42:20,929 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:42:20,929 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:42:20,930 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:42:20,931 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:42:20,932 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:42:20,933 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:42:20,934 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:42:20,935 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:42:20,936 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:42:20,937 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:42:20,939 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:42:20,939 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:42:20,940 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:42:20,941 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:42:20,941 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:42:20,942 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:42:20,943 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:42:20,945 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-20 05:42:21,003 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:42:21,004 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:42:21,005 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:42:21,005 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:42:21,007 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:42:21,007 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:42:21,009 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:42:21,009 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:42:21,009 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:42:21,009 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:42:21,010 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 05:42:21,011 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 05:42:21,011 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 05:42:21,011 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 05:42:21,011 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:42:21,012 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 05:42:21,012 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 05:42:21,012 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 05:42:21,012 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:42:21,012 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 05:42:21,013 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 05:42:21,013 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 05:42:21,013 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 05:42:21,013 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:42:21,013 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:42:21,014 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:42:21,014 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:42:21,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:42:21,014 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:42:21,015 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:42:21,015 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-20 05:42:21,015 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 05:42:21,015 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:42:21,016 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 05:42:21,016 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_11e61959-5a56-4302-b63a-541ea1b4de73/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f08d75c904d21d6573220c7737d451cd978e8a22a153e855f8d685d88a1eb60 [2021-11-20 05:42:21,499 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:42:21,531 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:42:21,535 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:42:21,537 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:42:21,538 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:42:21,539 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i [2021-11-20 05:42:21,623 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/data/782548762/8ee1178962294c3bbbde92caa17e1cd4/FLAG45f6aca7e [2021-11-20 05:42:22,396 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:42:22,397 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i [2021-11-20 05:42:22,423 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/data/782548762/8ee1178962294c3bbbde92caa17e1cd4/FLAG45f6aca7e [2021-11-20 05:42:22,541 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/data/782548762/8ee1178962294c3bbbde92caa17e1cd4 [2021-11-20 05:42:22,544 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:42:22,545 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:42:22,547 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:42:22,547 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:42:22,550 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:42:22,551 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:42:22" (1/1) ... [2021-11-20 05:42:22,552 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e92ecc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:42:22, skipping insertion in model container [2021-11-20 05:42:22,552 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:42:22" (1/1) ... [2021-11-20 05:42:22,559 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:42:22,617 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:42:23,105 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:42:23,127 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-20 05:42:23,139 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:42:23,239 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:42:23,264 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:42:23,361 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:42:23,426 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:42:23,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:42:23 WrapperNode [2021-11-20 05:42:23,427 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:42:23,428 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:42:23,429 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:42:23,429 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:42:23,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:42:23" (1/1) ... [2021-11-20 05:42:23,492 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:42:23" (1/1) ... [2021-11-20 05:42:23,534 INFO L137 Inliner]: procedures = 179, calls = 145, calls flagged for inlining = 33, calls inlined = 20, statements flattened = 332 [2021-11-20 05:42:23,535 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:42:23,536 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:42:23,536 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:42:23,536 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:42:23,545 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:42:23" (1/1) ... [2021-11-20 05:42:23,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:42:23" (1/1) ... [2021-11-20 05:42:23,553 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:42:23" (1/1) ... [2021-11-20 05:42:23,553 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:42:23" (1/1) ... [2021-11-20 05:42:23,577 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:42:23" (1/1) ... [2021-11-20 05:42:23,583 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:42:23" (1/1) ... [2021-11-20 05:42:23,587 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:42:23" (1/1) ... [2021-11-20 05:42:23,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:42:23,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:42:23,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:42:23,596 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:42:23,597 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:42:23" (1/1) ... [2021-11-20 05:42:23,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:42:23,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:42:23,642 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:42:23,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:42:23,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-20 05:42:23,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-20 05:42:23,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-20 05:42:23,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-20 05:42:23,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-20 05:42:23,682 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-20 05:42:23,682 INFO L130 BoogieDeclarations]: Found specification of procedure LDV_INIT_LIST_HEAD [2021-11-20 05:42:23,682 INFO L138 BoogieDeclarations]: Found implementation of procedure LDV_INIT_LIST_HEAD [2021-11-20 05:42:23,682 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2021-11-20 05:42:23,683 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2021-11-20 05:42:23,683 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-20 05:42:23,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-20 05:42:23,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-20 05:42:23,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-20 05:42:23,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 05:42:23,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 05:42:23,684 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_msg_free [2021-11-20 05:42:23,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_msg_free [2021-11-20 05:42:23,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 05:42:23,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 05:42:23,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-20 05:42:23,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 05:42:23,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-20 05:42:23,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 05:42:23,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 05:42:23,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-20 05:42:23,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-20 05:42:23,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:42:23,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:42:23,910 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:42:23,912 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:42:23,916 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-20 05:42:25,291 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:42:25,302 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:42:25,302 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-20 05:42:25,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:42:25 BoogieIcfgContainer [2021-11-20 05:42:25,310 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:42:25,315 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:42:25,315 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:42:25,318 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:42:25,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:42:22" (1/3) ... [2021-11-20 05:42:25,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@654fdcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:42:25, skipping insertion in model container [2021-11-20 05:42:25,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:42:23" (2/3) ... [2021-11-20 05:42:25,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@654fdcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:42:25, skipping insertion in model container [2021-11-20 05:42:25,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:42:25" (3/3) ... [2021-11-20 05:42:25,325 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test12-2.i [2021-11-20 05:42:25,331 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:42:25,331 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 124 error locations. [2021-11-20 05:42:25,394 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:42:25,408 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 05:42:25,409 INFO L340 AbstractCegarLoop]: Starting to check reachability of 124 error locations. [2021-11-20 05:42:25,431 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 05:42:25,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 05:42:25,440 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:25,441 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:42:25,441 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 05:42:25,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:25,447 INFO L85 PathProgramCache]: Analyzing trace with hash -297378988, now seen corresponding path program 1 times [2021-11-20 05:42:25,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:42:25,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1057902130] [2021-11-20 05:42:25,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:25,461 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:42:25,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:42:25,465 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:42:25,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 05:42:25,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:25,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 05:42:25,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:25,914 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 05:42:25,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:42:26,067 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 05:42:26,068 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:42:26,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1057902130] [2021-11-20 05:42:26,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1057902130] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:42:26,069 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:42:26,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-11-20 05:42:26,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593684237] [2021-11-20 05:42:26,072 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:42:26,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:42:26,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:42:26,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:42:26,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:42:26,112 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 05:42:27,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:42:27,671 INFO L93 Difference]: Finished difference Result 455 states and 504 transitions. [2021-11-20 05:42:27,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:42:27,674 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 05:42:27,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:42:27,694 INFO L225 Difference]: With dead ends: 455 [2021-11-20 05:42:27,695 INFO L226 Difference]: Without dead ends: 449 [2021-11-20 05:42:27,697 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 05:42:27,701 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 05:42:27,703 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 05:42:27,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-11-20 05:42:27,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 346. [2021-11-20 05:42:27,778 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 05:42:27,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 404 transitions. [2021-11-20 05:42:27,785 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 404 transitions. Word has length 11 [2021-11-20 05:42:27,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:42:27,785 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 404 transitions. [2021-11-20 05:42:27,786 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 05:42:27,786 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 404 transitions. [2021-11-20 05:42:27,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 05:42:27,787 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:27,788 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:42:27,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 05:42:28,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:42:28,004 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 05:42:28,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:28,006 INFO L85 PathProgramCache]: Analyzing trace with hash -297378987, now seen corresponding path program 1 times [2021-11-20 05:42:28,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:42:28,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1275555556] [2021-11-20 05:42:28,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:28,007 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:42:28,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:42:28,009 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:42:28,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 05:42:28,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:28,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 05:42:28,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:28,340 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 05:42:28,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:42:28,674 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 05:42:28,675 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:42:28,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1275555556] [2021-11-20 05:42:28,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1275555556] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:42:28,675 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:42:28,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-11-20 05:42:28,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315057246] [2021-11-20 05:42:28,676 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:42:28,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:42:28,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:42:28,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:42:28,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:42:28,679 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 05:42:31,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:42:31,131 INFO L93 Difference]: Finished difference Result 503 states and 596 transitions. [2021-11-20 05:42:31,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:42:31,132 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 05:42:31,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:42:31,137 INFO L225 Difference]: With dead ends: 503 [2021-11-20 05:42:31,137 INFO L226 Difference]: Without dead ends: 503 [2021-11-20 05:42:31,137 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 05:42:31,139 INFO L933 BasicCegarLoop]: 361 mSDtfsCounter, 340 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s 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, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:42:31,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 972 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 05:42:31,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-11-20 05:42:31,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 377. [2021-11-20 05:42:31,169 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 05:42:31,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 466 transitions. [2021-11-20 05:42:31,172 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 466 transitions. Word has length 11 [2021-11-20 05:42:31,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:42:31,173 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 466 transitions. [2021-11-20 05:42:31,173 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 05:42:31,173 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 466 transitions. [2021-11-20 05:42:31,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 05:42:31,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:31,175 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:42:31,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 05:42:31,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:42:31,386 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 05:42:31,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:31,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1184882668, now seen corresponding path program 1 times [2021-11-20 05:42:31,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:42:31,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [948569346] [2021-11-20 05:42:31,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:31,387 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:42:31,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:42:31,388 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:42:31,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 05:42:31,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:31,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:42:31,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:31,518 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 05:42:31,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:42:31,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:42:31,568 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:42:31,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [948569346] [2021-11-20 05:42:31,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [948569346] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:42:31,569 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:42:31,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-20 05:42:31,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467994371] [2021-11-20 05:42:31,569 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:42:31,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:42:31,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:42:31,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:42:31,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:42:31,573 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 05:42:31,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:42:31,734 INFO L93 Difference]: Finished difference Result 632 states and 765 transitions. [2021-11-20 05:42:31,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:42:31,739 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 05:42:31,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:42:31,747 INFO L225 Difference]: With dead ends: 632 [2021-11-20 05:42:31,748 INFO L226 Difference]: Without dead ends: 632 [2021-11-20 05:42:31,748 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 05:42:31,750 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 05:42:31,751 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 05:42:31,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-11-20 05:42:31,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 375. [2021-11-20 05:42:31,779 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 05:42:31,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 462 transitions. [2021-11-20 05:42:31,790 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 462 transitions. Word has length 11 [2021-11-20 05:42:31,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:42:31,791 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 462 transitions. [2021-11-20 05:42:31,791 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 05:42:31,791 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 462 transitions. [2021-11-20 05:42:31,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 05:42:31,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:31,792 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:42:31,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-20 05:42:31,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:42:31,993 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 05:42:31,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:31,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1981613461, now seen corresponding path program 1 times [2021-11-20 05:42:31,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:42:31,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2010642656] [2021-11-20 05:42:31,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:31,995 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:42:31,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:42:31,996 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:42:31,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 05:42:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:32,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 05:42:32,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:32,307 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 05:42:32,349 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 05:42:32,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:42:32,523 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 05:42:32,523 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:42:32,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2010642656] [2021-11-20 05:42:32,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2010642656] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:42:32,524 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:42:32,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 8 [2021-11-20 05:42:32,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919707666] [2021-11-20 05:42:32,524 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:42:32,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 05:42:32,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:42:32,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 05:42:32,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:42:32,526 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 05:42:35,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:42:35,083 INFO L93 Difference]: Finished difference Result 442 states and 535 transitions. [2021-11-20 05:42:35,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:42:35,085 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 05:42:35,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:42:35,088 INFO L225 Difference]: With dead ends: 442 [2021-11-20 05:42:35,089 INFO L226 Difference]: Without dead ends: 442 [2021-11-20 05:42:35,089 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 05:42:35,090 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 172 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s 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, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:42:35,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 1197 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-20 05:42:35,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-11-20 05:42:35,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 387. [2021-11-20 05:42:35,109 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 05:42:35,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 474 transitions. [2021-11-20 05:42:35,112 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 474 transitions. Word has length 13 [2021-11-20 05:42:35,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:42:35,112 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 474 transitions. [2021-11-20 05:42:35,113 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 05:42:35,113 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 474 transitions. [2021-11-20 05:42:35,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 05:42:35,114 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:35,114 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:42:35,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-20 05:42:35,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:42:35,325 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 05:42:35,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:35,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1981613462, now seen corresponding path program 1 times [2021-11-20 05:42:35,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:42:35,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [787129555] [2021-11-20 05:42:35,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:35,327 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:42:35,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:42:35,328 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:42:35,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 05:42:35,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:35,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 05:42:35,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:35,729 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 05:42:35,738 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 05:42:35,791 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 05:42:35,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:42:36,278 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 05:42:36,278 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:42:36,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [787129555] [2021-11-20 05:42:36,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [787129555] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:42:36,278 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:42:36,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 8 [2021-11-20 05:42:36,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467576685] [2021-11-20 05:42:36,279 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:42:36,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 05:42:36,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:42:36,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 05:42:36,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:42:36,280 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 05:42:40,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:42:40,728 INFO L93 Difference]: Finished difference Result 429 states and 513 transitions. [2021-11-20 05:42:40,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:42:40,729 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 05:42:40,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:42:40,733 INFO L225 Difference]: With dead ends: 429 [2021-11-20 05:42:40,733 INFO L226 Difference]: Without dead ends: 429 [2021-11-20 05:42:40,734 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 05:42:40,735 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 105 mSDsluCounter, 1384 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s 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, 4.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:42:40,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 1709 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1101 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-11-20 05:42:40,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-11-20 05:42:40,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 396. [2021-11-20 05:42:40,750 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 05:42:40,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 487 transitions. [2021-11-20 05:42:40,753 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 487 transitions. Word has length 13 [2021-11-20 05:42:40,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:42:40,754 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 487 transitions. [2021-11-20 05:42:40,754 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 05:42:40,755 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 487 transitions. [2021-11-20 05:42:40,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 05:42:40,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:40,756 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:42:40,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 05:42:40,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:42:40,971 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 05:42:40,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:40,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1895308392, now seen corresponding path program 1 times [2021-11-20 05:42:40,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:42:40,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185598951] [2021-11-20 05:42:40,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:40,974 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:42:40,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:42:40,975 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:42:40,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 05:42:41,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:41,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 05:42:41,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:41,122 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 05:42:41,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:42:41,209 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 05:42:41,210 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:42:41,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1185598951] [2021-11-20 05:42:41,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1185598951] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 05:42:41,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:42:41,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-20 05:42:41,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109188915] [2021-11-20 05:42:41,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:42:41,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:42:41,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:42:41,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:42:41,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:42:41,212 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 05:42:41,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:42:41,301 INFO L93 Difference]: Finished difference Result 360 states and 413 transitions. [2021-11-20 05:42:41,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:42:41,302 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 05:42:41,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:42:41,304 INFO L225 Difference]: With dead ends: 360 [2021-11-20 05:42:41,305 INFO L226 Difference]: Without dead ends: 360 [2021-11-20 05:42:41,305 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 05:42:41,306 INFO L933 BasicCegarLoop]: 343 mSDtfsCounter, 10 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 05:42:41,306 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 05:42:41,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-11-20 05:42:41,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 354. [2021-11-20 05:42:41,318 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 05:42:41,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 403 transitions. [2021-11-20 05:42:41,322 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 403 transitions. Word has length 17 [2021-11-20 05:42:41,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:42:41,322 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 403 transitions. [2021-11-20 05:42:41,322 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 05:42:41,323 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 403 transitions. [2021-11-20 05:42:41,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 05:42:41,323 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:41,324 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:42:41,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-20 05:42:41,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:42:41,535 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 05:42:41,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:41,538 INFO L85 PathProgramCache]: Analyzing trace with hash -2106255897, now seen corresponding path program 1 times [2021-11-20 05:42:41,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:42:41,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [169495582] [2021-11-20 05:42:41,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:41,538 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:42:41,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:42:41,540 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:42:41,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-20 05:42:41,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:41,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:42:41,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:41,662 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 05:42:41,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:42:41,722 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 05:42:41,722 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:42:41,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [169495582] [2021-11-20 05:42:41,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [169495582] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:42:41,723 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:42:41,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-11-20 05:42:41,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097419693] [2021-11-20 05:42:41,723 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:42:41,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:42:41,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:42:41,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:42:41,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:42:41,726 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 05:42:41,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:42:41,804 INFO L93 Difference]: Finished difference Result 353 states and 402 transitions. [2021-11-20 05:42:41,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:42:41,805 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 05:42:41,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:42:41,810 INFO L225 Difference]: With dead ends: 353 [2021-11-20 05:42:41,810 INFO L226 Difference]: Without dead ends: 353 [2021-11-20 05:42:41,814 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 05:42:41,815 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 05:42:41,818 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 05:42:41,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-11-20 05:42:41,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2021-11-20 05:42:41,830 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 05:42:41,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 402 transitions. [2021-11-20 05:42:41,832 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 402 transitions. Word has length 17 [2021-11-20 05:42:41,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:42:41,833 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 402 transitions. [2021-11-20 05:42:41,833 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 05:42:41,833 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 402 transitions. [2021-11-20 05:42:41,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 05:42:41,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:41,837 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:42:41,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-20 05:42:42,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:42:42,053 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 05:42:42,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:42,054 INFO L85 PathProgramCache]: Analyzing trace with hash -2106256148, now seen corresponding path program 1 times [2021-11-20 05:42:42,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:42:42,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [252776625] [2021-11-20 05:42:42,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:42,055 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:42:42,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:42:42,055 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:42:42,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-20 05:42:42,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:42,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 05:42:42,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:42,199 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 05:42:42,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:42:42,291 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 05:42:42,292 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:42:42,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [252776625] [2021-11-20 05:42:42,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [252776625] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:42:42,292 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:42:42,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-20 05:42:42,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397275015] [2021-11-20 05:42:42,292 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:42:42,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:42:42,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:42:42,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:42:42,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:42:42,293 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 05:42:42,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:42:42,351 INFO L93 Difference]: Finished difference Result 397 states and 452 transitions. [2021-11-20 05:42:42,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:42:42,351 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 05:42:42,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:42:42,356 INFO L225 Difference]: With dead ends: 397 [2021-11-20 05:42:42,356 INFO L226 Difference]: Without dead ends: 397 [2021-11-20 05:42:42,356 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 05:42:42,357 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 05:42:42,357 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 05:42:42,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-11-20 05:42:42,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 355. [2021-11-20 05:42:42,373 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 05:42:42,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 404 transitions. [2021-11-20 05:42:42,376 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 404 transitions. Word has length 17 [2021-11-20 05:42:42,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:42:42,378 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 404 transitions. [2021-11-20 05:42:42,378 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 05:42:42,378 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 404 transitions. [2021-11-20 05:42:42,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 05:42:42,384 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:42,385 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:42:42,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-20 05:42:42,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:42:42,601 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 05:42:42,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:42,601 INFO L85 PathProgramCache]: Analyzing trace with hash -2134885299, now seen corresponding path program 1 times [2021-11-20 05:42:42,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:42:42,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [643745476] [2021-11-20 05:42:42,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:42,601 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:42:42,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:42:42,602 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:42:42,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-20 05:42:42,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:42,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 05:42:42,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:42,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 05:42:42,825 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 05:42:42,825 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 05:42:42,906 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 05:42:42,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:42:53,654 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 05:42:53,654 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:42:53,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [643745476] [2021-11-20 05:42:53,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [643745476] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:42:53,655 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:42:53,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-20 05:42:53,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515559959] [2021-11-20 05:42:53,655 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:42:53,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 05:42:53,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:42:53,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 05:42:53,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=119, Unknown=5, NotChecked=0, Total=156 [2021-11-20 05:42:53,657 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 05:42:53,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:42:53,710 INFO L93 Difference]: Finished difference Result 360 states and 414 transitions. [2021-11-20 05:42:53,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:42:53,711 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 05:42:53,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:42:53,713 INFO L225 Difference]: With dead ends: 360 [2021-11-20 05:42:53,714 INFO L226 Difference]: Without dead ends: 360 [2021-11-20 05:42:53,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=39, Invalid=138, Unknown=5, NotChecked=0, Total=182 [2021-11-20 05:42:53,715 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 05:42:53,716 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 05:42:53,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-11-20 05:42:53,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 356. [2021-11-20 05:42:53,727 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 05:42:53,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 404 transitions. [2021-11-20 05:42:53,730 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 404 transitions. Word has length 17 [2021-11-20 05:42:53,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:42:53,730 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 404 transitions. [2021-11-20 05:42:53,731 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 05:42:53,731 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 404 transitions. [2021-11-20 05:42:53,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 05:42:53,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:42:53,732 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:42:53,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-20 05:42:53,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:42:53,947 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 05:42:53,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:42:53,947 INFO L85 PathProgramCache]: Analyzing trace with hash -2134885298, now seen corresponding path program 1 times [2021-11-20 05:42:53,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:42:53,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1954310818] [2021-11-20 05:42:53,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:42:53,948 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:42:53,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:42:53,949 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:42:53,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-20 05:42:54,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:42:54,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 05:42:54,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:42:54,075 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 05:42:54,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 05:42:56,359 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 05:42:56,360 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 05:42:56,372 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 05:42:56,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-11-20 05:42:56,417 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 05:42:56,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:43:02,700 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 05:43:02,778 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 05:43:02,778 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:43:02,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1954310818] [2021-11-20 05:43:02,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1954310818] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:43:02,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:43:02,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-11-20 05:43:02,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910924485] [2021-11-20 05:43:02,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:43:02,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 05:43:02,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:43:02,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 05:43:02,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=200, Unknown=2, NotChecked=0, Total=240 [2021-11-20 05:43:02,781 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 05:43:08,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:43:08,434 INFO L93 Difference]: Finished difference Result 402 states and 456 transitions. [2021-11-20 05:43:08,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 05:43:08,436 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 05:43:08,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:43:08,439 INFO L225 Difference]: With dead ends: 402 [2021-11-20 05:43:08,439 INFO L226 Difference]: Without dead ends: 402 [2021-11-20 05:43:08,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=65, Invalid=313, Unknown=2, NotChecked=0, Total=380 [2021-11-20 05:43:08,440 INFO L933 BasicCegarLoop]: 326 mSDtfsCounter, 97 mSDsluCounter, 1542 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 1868 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 998 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:43:08,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 1868 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 402 Invalid, 0 Unknown, 998 Unchecked, 1.4s Time] [2021-11-20 05:43:08,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-11-20 05:43:08,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 358. [2021-11-20 05:43:08,454 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 05:43:08,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 407 transitions. [2021-11-20 05:43:08,456 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 407 transitions. Word has length 17 [2021-11-20 05:43:08,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:43:08,457 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 407 transitions. [2021-11-20 05:43:08,457 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 05:43:08,457 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 407 transitions. [2021-11-20 05:43:08,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 05:43:08,458 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:43:08,458 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:43:08,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-20 05:43:08,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:43:08,672 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 05:43:08,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:43:08,672 INFO L85 PathProgramCache]: Analyzing trace with hash -869422937, now seen corresponding path program 1 times [2021-11-20 05:43:08,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:43:08,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1883290236] [2021-11-20 05:43:08,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:43:08,672 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:43:08,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:43:08,673 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:43:08,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-20 05:43:08,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:43:08,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 05:43:08,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:43:08,999 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 05:43:08,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:43:09,113 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 05:43:09,113 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:43:09,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1883290236] [2021-11-20 05:43:09,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1883290236] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:43:09,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:43:09,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-11-20 05:43:09,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078545333] [2021-11-20 05:43:09,114 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:43:09,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 05:43:09,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:43:09,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 05:43:09,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:43:09,115 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 05:43:09,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:43:09,762 INFO L93 Difference]: Finished difference Result 363 states and 415 transitions. [2021-11-20 05:43:09,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 05:43:09,763 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 05:43:09,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:43:09,766 INFO L225 Difference]: With dead ends: 363 [2021-11-20 05:43:09,766 INFO L226 Difference]: Without dead ends: 363 [2021-11-20 05:43:09,766 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 05:43:09,767 INFO L933 BasicCegarLoop]: 306 mSDtfsCounter, 1072 mSDsluCounter, 967 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:43:09,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1086 Valid, 1273 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 294 Invalid, 0 Unknown, 41 Unchecked, 0.6s Time] [2021-11-20 05:43:09,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-11-20 05:43:09,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 357. [2021-11-20 05:43:09,780 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 05:43:09,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 405 transitions. [2021-11-20 05:43:09,782 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 405 transitions. Word has length 18 [2021-11-20 05:43:09,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:43:09,782 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 405 transitions. [2021-11-20 05:43:09,783 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 05:43:09,783 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 405 transitions. [2021-11-20 05:43:09,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 05:43:09,784 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:43:09,784 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 05:43:09,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-20 05:43:10,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:43:10,003 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 05:43:10,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:43:10,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1883109288, now seen corresponding path program 1 times [2021-11-20 05:43:10,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:43:10,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [262924271] [2021-11-20 05:43:10,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:43:10,005 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:43:10,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:43:10,006 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:43:10,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-20 05:43:10,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:43:10,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:43:10,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:43:10,162 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 05:43:10,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:43:10,231 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 05:43:10,231 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:43:10,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [262924271] [2021-11-20 05:43:10,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [262924271] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:43:10,231 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:43:10,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 05:43:10,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014156444] [2021-11-20 05:43:10,232 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:43:10,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:43:10,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:43:10,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:43:10,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:43:10,233 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 05:43:11,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:43:11,120 INFO L93 Difference]: Finished difference Result 364 states and 416 transitions. [2021-11-20 05:43:11,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:43:11,121 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 05:43:11,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:43:11,124 INFO L225 Difference]: With dead ends: 364 [2021-11-20 05:43:11,124 INFO L226 Difference]: Without dead ends: 351 [2021-11-20 05:43:11,124 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 05:43:11,125 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, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 05:43:11,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 679 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 05:43:11,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-11-20 05:43:11,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 347. [2021-11-20 05:43:11,137 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 05:43:11,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 394 transitions. [2021-11-20 05:43:11,139 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 394 transitions. Word has length 18 [2021-11-20 05:43:11,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:43:11,139 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 394 transitions. [2021-11-20 05:43:11,140 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 05:43:11,140 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 394 transitions. [2021-11-20 05:43:11,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 05:43:11,141 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:43:11,142 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:43:11,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-20 05:43:11,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:43:11,353 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 05:43:11,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:43:11,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1369850122, now seen corresponding path program 1 times [2021-11-20 05:43:11,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:43:11,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1121952463] [2021-11-20 05:43:11,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:43:11,354 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:43:11,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:43:11,355 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:43:11,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-20 05:43:11,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:43:11,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:43:11,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:43:11,503 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 05:43:11,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:43:11,564 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 05:43:11,564 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:43:11,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1121952463] [2021-11-20 05:43:11,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1121952463] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:43:11,565 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:43:11,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-20 05:43:11,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868570063] [2021-11-20 05:43:11,565 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:43:11,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:43:11,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:43:11,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:43:11,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:43:11,566 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 05:43:11,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:43:11,621 INFO L93 Difference]: Finished difference Result 384 states and 436 transitions. [2021-11-20 05:43:11,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:43:11,621 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 05:43:11,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:43:11,624 INFO L225 Difference]: With dead ends: 384 [2021-11-20 05:43:11,624 INFO L226 Difference]: Without dead ends: 384 [2021-11-20 05:43:11,625 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 05:43:11,626 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 252 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:43:11,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 1238 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:43:11,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-11-20 05:43:11,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 347. [2021-11-20 05:43:11,637 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 05:43:11,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 393 transitions. [2021-11-20 05:43:11,639 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 393 transitions. Word has length 19 [2021-11-20 05:43:11,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:43:11,640 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 393 transitions. [2021-11-20 05:43:11,640 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 05:43:11,640 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 393 transitions. [2021-11-20 05:43:11,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 05:43:11,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:43:11,641 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 05:43:11,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-20 05:43:11,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:43:11,853 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 05:43:11,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:43:11,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1969475052, now seen corresponding path program 1 times [2021-11-20 05:43:11,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:43:11,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1558628211] [2021-11-20 05:43:11,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:43:11,868 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:43:11,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:43:11,870 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:43:11,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-20 05:43:11,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:43:11,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 05:43:11,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:43:12,127 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 05:43:12,127 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 05:43:12,475 INFO L354 Elim1Store]: treesize reduction 20, result has 28.6 percent of original size [2021-11-20 05:43:12,476 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 05:43:12,603 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 05:43:12,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:43:12,936 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 05:43:12,936 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:43:12,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1558628211] [2021-11-20 05:43:12,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1558628211] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:43:12,936 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:43:12,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 11 [2021-11-20 05:43:12,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238683689] [2021-11-20 05:43:12,937 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:43:12,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 05:43:12,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:43:12,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 05:43:12,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-20 05:43:12,938 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 05:43:14,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:43:14,067 INFO L93 Difference]: Finished difference Result 349 states and 396 transitions. [2021-11-20 05:43:14,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 05:43:14,068 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 05:43:14,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:43:14,071 INFO L225 Difference]: With dead ends: 349 [2021-11-20 05:43:14,071 INFO L226 Difference]: Without dead ends: 349 [2021-11-20 05:43:14,071 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 05:43:14,072 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 05:43:14,073 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 05:43:14,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-11-20 05:43:14,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2021-11-20 05:43:14,083 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 05:43:14,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 396 transitions. [2021-11-20 05:43:14,085 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 396 transitions. Word has length 21 [2021-11-20 05:43:14,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:43:14,086 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 396 transitions. [2021-11-20 05:43:14,086 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 05:43:14,086 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 396 transitions. [2021-11-20 05:43:14,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-20 05:43:14,087 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:43:14,087 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 05:43:14,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-20 05:43:14,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:43:14,300 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 05:43:14,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:43:14,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1969475053, now seen corresponding path program 1 times [2021-11-20 05:43:14,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:43:14,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2057212029] [2021-11-20 05:43:14,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:43:14,302 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:43:14,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:43:14,303 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:43:14,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-20 05:43:14,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:43:14,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 05:43:14,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:43:16,625 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 05:43:16,626 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 05:43:18,801 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 05:43:18,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:43:32,053 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 05:43:32,053 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:43:32,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2057212029] [2021-11-20 05:43:32,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2057212029] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:43:32,053 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:43:32,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-11-20 05:43:32,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172967277] [2021-11-20 05:43:32,054 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:43:32,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 05:43:32,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:43:32,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 05:43:32,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=88, Unknown=6, NotChecked=0, Total=132 [2021-11-20 05:43:32,055 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 05:43:34,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:43:34,798 INFO L93 Difference]: Finished difference Result 351 states and 402 transitions. [2021-11-20 05:43:34,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:43:34,799 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 05:43:34,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:43:34,802 INFO L225 Difference]: With dead ends: 351 [2021-11-20 05:43:34,802 INFO L226 Difference]: Without dead ends: 351 [2021-11-20 05:43:34,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=54, Invalid=121, Unknown=7, NotChecked=0, Total=182 [2021-11-20 05:43:34,803 INFO L933 BasicCegarLoop]: 306 mSDtfsCounter, 93 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:43:34,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 766 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 117 Invalid, 0 Unknown, 311 Unchecked, 0.6s Time] [2021-11-20 05:43:34,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-11-20 05:43:34,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 349. [2021-11-20 05:43:34,814 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 05:43:34,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 395 transitions. [2021-11-20 05:43:34,816 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 395 transitions. Word has length 21 [2021-11-20 05:43:34,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:43:34,817 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 395 transitions. [2021-11-20 05:43:34,817 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 05:43:34,817 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 395 transitions. [2021-11-20 05:43:34,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-20 05:43:34,818 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:43:34,818 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 05:43:34,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-20 05:43:35,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:43:35,043 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 05:43:35,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:43:35,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1415040467, now seen corresponding path program 1 times [2021-11-20 05:43:35,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:43:35,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1602047777] [2021-11-20 05:43:35,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:43:35,044 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:43:35,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:43:35,046 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:43:35,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-20 05:43:35,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:43:35,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 05:43:35,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:43:35,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-11-20 05:43:35,245 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 05:43:35,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:43:35,267 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-11-20 05:43:35,268 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 05:43:35,334 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 05:43:35,334 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:43:35,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1602047777] [2021-11-20 05:43:35,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1602047777] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:43:35,335 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:43:35,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 4 [2021-11-20 05:43:35,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613001802] [2021-11-20 05:43:35,335 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:43:35,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:43:35,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:43:35,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:43:35,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:43:35,337 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 05:43:36,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:43:36,110 INFO L93 Difference]: Finished difference Result 389 states and 436 transitions. [2021-11-20 05:43:36,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:43:36,111 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 05:43:36,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:43:36,113 INFO L225 Difference]: With dead ends: 389 [2021-11-20 05:43:36,114 INFO L226 Difference]: Without dead ends: 389 [2021-11-20 05:43:36,114 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 05:43:36,115 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 57 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 05:43:36,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 1034 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 05:43:36,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-11-20 05:43:36,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 351. [2021-11-20 05:43:36,124 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 05:43:36,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 398 transitions. [2021-11-20 05:43:36,126 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 398 transitions. Word has length 23 [2021-11-20 05:43:36,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:43:36,127 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 398 transitions. [2021-11-20 05:43:36,127 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 05:43:36,127 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 398 transitions. [2021-11-20 05:43:36,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-20 05:43:36,128 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:43:36,128 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 05:43:36,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-20 05:43:36,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:43:36,339 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 05:43:36,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:43:36,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1415040466, now seen corresponding path program 1 times [2021-11-20 05:43:36,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:43:36,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065661406] [2021-11-20 05:43:36,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:43:36,340 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:43:36,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:43:36,340 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:43:36,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-20 05:43:36,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:43:36,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 05:43:36,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:43:36,638 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 05:43:36,640 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 05:43:36,673 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 05:43:36,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:43:36,803 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:43:36,804 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 05:43:37,238 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 05:43:37,239 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:43:37,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1065661406] [2021-11-20 05:43:37,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1065661406] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:43:37,239 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:43:37,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 7 [2021-11-20 05:43:37,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342182498] [2021-11-20 05:43:37,239 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:43:37,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:43:37,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:43:37,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:43:37,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:43:37,241 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 05:43:39,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:43:39,085 INFO L93 Difference]: Finished difference Result 396 states and 444 transitions. [2021-11-20 05:43:39,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 05:43:39,086 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 05:43:39,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:43:39,088 INFO L225 Difference]: With dead ends: 396 [2021-11-20 05:43:39,089 INFO L226 Difference]: Without dead ends: 396 [2021-11-20 05:43:39,089 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 05:43:39,090 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 103 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s 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, 1.8s IncrementalHoareTripleChecker+Time [2021-11-20 05:43:39,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 1094 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-20 05:43:39,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-11-20 05:43:39,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 351. [2021-11-20 05:43:39,100 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 05:43:39,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 397 transitions. [2021-11-20 05:43:39,102 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 397 transitions. Word has length 23 [2021-11-20 05:43:39,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:43:39,102 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 397 transitions. [2021-11-20 05:43:39,103 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 05:43:39,103 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 397 transitions. [2021-11-20 05:43:39,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 05:43:39,104 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:43:39,104 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 05:43:39,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-20 05:43:39,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:43:39,316 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 05:43:39,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:43:39,316 INFO L85 PathProgramCache]: Analyzing trace with hash -412937067, now seen corresponding path program 1 times [2021-11-20 05:43:39,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:43:39,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2063855759] [2021-11-20 05:43:39,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:43:39,317 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:43:39,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:43:39,317 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:43:39,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-20 05:43:39,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:43:39,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:43:39,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:43:39,461 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 05:43:39,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:43:39,525 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 05:43:39,525 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:43:39,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2063855759] [2021-11-20 05:43:39,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2063855759] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:43:39,525 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:43:39,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-11-20 05:43:39,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221102110] [2021-11-20 05:43:39,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:43:39,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:43:39,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:43:39,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:43:39,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:43:39,527 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 05:43:39,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:43:39,573 INFO L93 Difference]: Finished difference Result 350 states and 396 transitions. [2021-11-20 05:43:39,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:43:39,574 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 05:43:39,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:43:39,576 INFO L225 Difference]: With dead ends: 350 [2021-11-20 05:43:39,577 INFO L226 Difference]: Without dead ends: 350 [2021-11-20 05:43:39,577 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 05:43:39,578 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 05:43:39,578 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 05:43:39,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-11-20 05:43:39,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 350. [2021-11-20 05:43:39,587 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 05:43:39,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 396 transitions. [2021-11-20 05:43:39,589 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 396 transitions. Word has length 25 [2021-11-20 05:43:39,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:43:39,590 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 396 transitions. [2021-11-20 05:43:39,590 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 05:43:39,590 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 396 transitions. [2021-11-20 05:43:39,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 05:43:39,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:43:39,591 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 05:43:39,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-20 05:43:39,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:43:39,804 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 05:43:39,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:43:39,805 INFO L85 PathProgramCache]: Analyzing trace with hash -412937301, now seen corresponding path program 1 times [2021-11-20 05:43:39,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:43:39,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [284686453] [2021-11-20 05:43:39,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:43:39,805 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:43:39,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:43:39,806 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:43:39,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-20 05:43:39,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:43:39,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 05:43:39,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:43:39,986 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 05:43:39,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:43:40,092 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 05:43:40,093 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:43:40,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [284686453] [2021-11-20 05:43:40,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [284686453] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:43:40,093 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:43:40,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-20 05:43:40,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379775495] [2021-11-20 05:43:40,093 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:43:40,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:43:40,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:43:40,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:43:40,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:43:40,095 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 05:43:40,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:43:40,130 INFO L93 Difference]: Finished difference Result 398 states and 450 transitions. [2021-11-20 05:43:40,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:43:40,130 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 05:43:40,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:43:40,133 INFO L225 Difference]: With dead ends: 398 [2021-11-20 05:43:40,133 INFO L226 Difference]: Without dead ends: 398 [2021-11-20 05:43:40,133 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 05:43:40,134 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 05:43:40,134 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 05:43:40,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-11-20 05:43:40,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 354. [2021-11-20 05:43:40,143 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 05:43:40,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 405 transitions. [2021-11-20 05:43:40,145 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 405 transitions. Word has length 25 [2021-11-20 05:43:40,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:43:40,146 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 405 transitions. [2021-11-20 05:43:40,146 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 05:43:40,146 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 405 transitions. [2021-11-20 05:43:40,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 05:43:40,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:43:40,147 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 05:43:40,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-20 05:43:40,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:43:40,359 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 05:43:40,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:43:40,360 INFO L85 PathProgramCache]: Analyzing trace with hash -441566452, now seen corresponding path program 1 times [2021-11-20 05:43:40,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:43:40,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2061210695] [2021-11-20 05:43:40,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:43:40,360 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:43:40,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:43:40,361 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:43:40,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-20 05:43:40,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:43:40,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 05:43:40,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:43:40,474 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 05:43:40,606 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-20 05:43:40,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 05:43:40,643 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 05:43:40,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:43:40,862 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 05:43:40,862 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:43:40,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2061210695] [2021-11-20 05:43:40,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2061210695] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:43:40,862 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:43:40,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-11-20 05:43:40,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32806537] [2021-11-20 05:43:40,862 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:43:40,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:43:40,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:43:40,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:43:40,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:43:40,863 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 05:43:42,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:43:42,743 INFO L93 Difference]: Finished difference Result 498 states and 575 transitions. [2021-11-20 05:43:42,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:43:42,744 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 05:43:42,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:43:42,746 INFO L225 Difference]: With dead ends: 498 [2021-11-20 05:43:42,747 INFO L226 Difference]: Without dead ends: 498 [2021-11-20 05:43:42,747 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 05:43:42,747 INFO L933 BasicCegarLoop]: 263 mSDtfsCounter, 182 mSDsluCounter, 1025 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s 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, 1.8s IncrementalHoareTripleChecker+Time [2021-11-20 05:43:42,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 1288 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 727 Invalid, 0 Unknown, 275 Unchecked, 1.8s Time] [2021-11-20 05:43:42,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-11-20 05:43:42,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 356. [2021-11-20 05:43:42,757 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 05:43:42,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 408 transitions. [2021-11-20 05:43:42,760 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 408 transitions. Word has length 25 [2021-11-20 05:43:42,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:43:42,760 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 408 transitions. [2021-11-20 05:43:42,760 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 05:43:42,760 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 408 transitions. [2021-11-20 05:43:42,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 05:43:42,761 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:43:42,761 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 05:43:42,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-20 05:43:42,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:43:42,973 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 05:43:42,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:43:42,973 INFO L85 PathProgramCache]: Analyzing trace with hash -441566451, now seen corresponding path program 1 times [2021-11-20 05:43:42,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:43:42,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [480334376] [2021-11-20 05:43:42,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:43:42,974 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:43:42,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:43:42,975 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:43:43,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-20 05:43:43,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:43:43,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 05:43:43,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:43:43,113 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 05:43:47,348 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 05:43:47,348 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 05:43:47,382 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 05:43:47,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:43:49,036 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 05:43:49,037 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:43:49,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [480334376] [2021-11-20 05:43:49,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [480334376] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:43:49,037 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:43:49,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-11-20 05:43:49,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409042366] [2021-11-20 05:43:49,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:43:49,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 05:43:49,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:43:49,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 05:43:49,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=195, Unknown=2, NotChecked=0, Total=240 [2021-11-20 05:43:49,039 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 05:43:50,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:43:50,749 INFO L93 Difference]: Finished difference Result 402 states and 453 transitions. [2021-11-20 05:43:50,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 05:43:50,750 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 05:43:50,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:43:50,752 INFO L225 Difference]: With dead ends: 402 [2021-11-20 05:43:50,752 INFO L226 Difference]: Without dead ends: 402 [2021-11-20 05:43:50,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=59, Invalid=245, Unknown=2, NotChecked=0, Total=306 [2021-11-20 05:43:50,753 INFO L933 BasicCegarLoop]: 345 mSDtfsCounter, 59 mSDsluCounter, 2817 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:43:50,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 3162 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 652 Invalid, 0 Unknown, 703 Unchecked, 1.5s Time] [2021-11-20 05:43:50,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-11-20 05:43:50,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 359. [2021-11-20 05:43:50,763 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 05:43:50,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 406 transitions. [2021-11-20 05:43:50,765 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 406 transitions. Word has length 25 [2021-11-20 05:43:50,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:43:50,766 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 406 transitions. [2021-11-20 05:43:50,766 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 05:43:50,766 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 406 transitions. [2021-11-20 05:43:50,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 05:43:50,767 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:43:50,767 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 05:43:50,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-20 05:43:50,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:43:50,978 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 05:43:50,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:43:50,979 INFO L85 PathProgramCache]: Analyzing trace with hash 83853234, now seen corresponding path program 1 times [2021-11-20 05:43:50,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:43:50,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1288988728] [2021-11-20 05:43:50,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:43:50,979 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:43:50,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:43:50,980 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:43:50,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-20 05:43:51,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:43:51,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 05:43:51,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:43:51,481 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 05:43:51,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:43:51,665 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 05:43:51,665 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:43:51,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1288988728] [2021-11-20 05:43:51,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1288988728] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:43:51,666 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:43:51,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-11-20 05:43:51,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425753402] [2021-11-20 05:43:51,666 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:43:51,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 05:43:51,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:43:51,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 05:43:51,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:43:51,671 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 05:43:51,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:43:51,966 INFO L93 Difference]: Finished difference Result 589 states and 670 transitions. [2021-11-20 05:43:51,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:43:51,969 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 05:43:51,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:43:51,972 INFO L225 Difference]: With dead ends: 589 [2021-11-20 05:43:51,972 INFO L226 Difference]: Without dead ends: 589 [2021-11-20 05:43:51,972 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 05:43:51,973 INFO L933 BasicCegarLoop]: 531 mSDtfsCounter, 319 mSDsluCounter, 1758 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 05:43:51,973 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 05:43:51,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-11-20 05:43:51,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 456. [2021-11-20 05:43:51,987 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 05:43:51,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 593 transitions. [2021-11-20 05:43:51,991 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 593 transitions. Word has length 26 [2021-11-20 05:43:51,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:43:51,991 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 593 transitions. [2021-11-20 05:43:51,991 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 05:43:51,992 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 593 transitions. [2021-11-20 05:43:51,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 05:43:51,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:43:51,992 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 05:43:52,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-20 05:43:52,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:43:52,204 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 05:43:52,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:43:52,205 INFO L85 PathProgramCache]: Analyzing trace with hash -366162574, now seen corresponding path program 1 times [2021-11-20 05:43:52,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:43:52,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [491855804] [2021-11-20 05:43:52,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:43:52,205 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:43:52,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:43:52,206 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:43:52,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-20 05:43:52,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:43:52,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 05:43:52,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:43:52,647 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 05:43:52,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 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 05:43:52,759 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 05:43:52,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:43:52,978 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 05:43:52,979 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:43:52,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [491855804] [2021-11-20 05:43:52,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [491855804] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:43:52,979 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:43:52,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 8 [2021-11-20 05:43:52,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705572579] [2021-11-20 05:43:52,980 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:43:52,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:43:52,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:43:52,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:43:52,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:43:52,981 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 05:43:53,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:43:53,717 INFO L93 Difference]: Finished difference Result 462 states and 598 transitions. [2021-11-20 05:43:53,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:43:53,719 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 05:43:53,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:43:53,723 INFO L225 Difference]: With dead ends: 462 [2021-11-20 05:43:53,724 INFO L226 Difference]: Without dead ends: 462 [2021-11-20 05:43:53,724 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 05:43:53,725 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 27 mSDsluCounter, 1234 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 05:43:53,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 1566 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 05:43:53,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-20 05:43:53,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 458. [2021-11-20 05:43:53,741 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 05:43:53,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 595 transitions. [2021-11-20 05:43:53,744 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 595 transitions. Word has length 26 [2021-11-20 05:43:53,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:43:53,745 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 595 transitions. [2021-11-20 05:43:53,745 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 05:43:53,745 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 595 transitions. [2021-11-20 05:43:53,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 05:43:53,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:43:53,746 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 05:43:53,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-20 05:43:53,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:43:53,959 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 05:43:53,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:43:53,959 INFO L85 PathProgramCache]: Analyzing trace with hash 305064464, now seen corresponding path program 1 times [2021-11-20 05:43:53,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:43:53,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1612866522] [2021-11-20 05:43:53,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:43:53,960 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:43:53,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:43:53,961 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:43:54,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-20 05:43:54,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:43:54,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 05:43:54,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:43:54,422 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 05:43:54,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:43:58,962 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 05:43:59,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-20 05:43:59,019 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:43:59,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1612866522] [2021-11-20 05:43:59,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1612866522] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:43:59,019 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:43:59,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-11-20 05:43:59,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100693249] [2021-11-20 05:43:59,020 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:43:59,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 05:43:59,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:43:59,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 05:43:59,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=95, Unknown=12, NotChecked=20, Total=156 [2021-11-20 05:43:59,021 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 05:44:01,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:44:01,340 INFO L93 Difference]: Finished difference Result 465 states and 600 transitions. [2021-11-20 05:44:01,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:44:01,341 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 05:44:01,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:44:01,344 INFO L225 Difference]: With dead ends: 465 [2021-11-20 05:44:01,344 INFO L226 Difference]: Without dead ends: 449 [2021-11-20 05:44:01,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=35, Invalid=113, Unknown=12, NotChecked=22, Total=182 [2021-11-20 05:44:01,345 INFO L933 BasicCegarLoop]: 318 mSDtfsCounter, 48 mSDsluCounter, 1590 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1908 SdHoareTripleChecker+Invalid, 1476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 519 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:44:01,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 1908 Invalid, 1476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 943 Invalid, 0 Unknown, 519 Unchecked, 2.3s Time] [2021-11-20 05:44:01,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-11-20 05:44:01,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 447. [2021-11-20 05:44:01,358 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 05:44:01,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 582 transitions. [2021-11-20 05:44:01,361 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 582 transitions. Word has length 28 [2021-11-20 05:44:01,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:44:01,361 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 582 transitions. [2021-11-20 05:44:01,361 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 05:44:01,362 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 582 transitions. [2021-11-20 05:44:01,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 05:44:01,362 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:44:01,362 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 05:44:01,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-20 05:44:01,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:44:01,575 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 05:44:01,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:44:01,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1975256279, now seen corresponding path program 1 times [2021-11-20 05:44:01,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:44:01,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1677105945] [2021-11-20 05:44:01,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:44:01,577 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:44:01,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:44:01,578 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:44:01,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-20 05:44:01,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:44:01,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 05:44:01,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:44:01,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 05:44:01,830 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 05:44:01,830 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 05:44:02,031 INFO L354 Elim1Store]: treesize reduction 20, result has 28.6 percent of original size [2021-11-20 05:44:02,031 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 05:44:02,077 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 05:44:02,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:44:04,500 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 05:44:04,500 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:44:04,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1677105945] [2021-11-20 05:44:04,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1677105945] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:44:04,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:44:04,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-11-20 05:44:04,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594867507] [2021-11-20 05:44:04,501 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:44:04,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 05:44:04,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:44:04,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 05:44:04,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=170, Unknown=1, NotChecked=0, Total=210 [2021-11-20 05:44:04,502 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 05:44:12,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:44:12,128 INFO L93 Difference]: Finished difference Result 506 states and 644 transitions. [2021-11-20 05:44:12,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 05:44:12,129 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 05:44:12,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:44:12,133 INFO L225 Difference]: With dead ends: 506 [2021-11-20 05:44:12,133 INFO L226 Difference]: Without dead ends: 506 [2021-11-20 05:44:12,133 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 05:44:12,140 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 130 mSDsluCounter, 1351 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 1644 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 400 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:44:12,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 1644 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 737 Invalid, 0 Unknown, 400 Unchecked, 1.5s Time] [2021-11-20 05:44:12,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-11-20 05:44:12,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 450. [2021-11-20 05:44:12,163 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 05:44:12,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 585 transitions. [2021-11-20 05:44:12,166 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 585 transitions. Word has length 30 [2021-11-20 05:44:12,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:44:12,166 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 585 transitions. [2021-11-20 05:44:12,167 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 05:44:12,167 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 585 transitions. [2021-11-20 05:44:12,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 05:44:12,169 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:44:12,169 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 05:44:12,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-20 05:44:12,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:44:12,385 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 05:44:12,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:44:12,386 INFO L85 PathProgramCache]: Analyzing trace with hash -154246822, now seen corresponding path program 1 times [2021-11-20 05:44:12,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:44:12,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1533855] [2021-11-20 05:44:12,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:44:12,387 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:44:12,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:44:12,388 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:44:12,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-20 05:44:12,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:44:12,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 05:44:12,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:44:12,639 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 05:44:12,639 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 05:44:12,849 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-11-20 05:44:12,850 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 05:44:13,268 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-11-20 05:44:13,268 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 05:44:13,418 INFO L354 Elim1Store]: treesize reduction 42, result has 33.3 percent of original size [2021-11-20 05:44:13,418 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 05:44:13,533 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 05:44:13,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:45:29,988 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 05:45:29,988 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:45:29,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1533855] [2021-11-20 05:45:29,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1533855] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:45:29,989 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:45:29,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 21 [2021-11-20 05:45:29,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278692832] [2021-11-20 05:45:29,989 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:45:29,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 05:45:29,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:45:29,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 05:45:29,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=339, Unknown=35, NotChecked=0, Total=506 [2021-11-20 05:45:29,991 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 05:45:30,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:45:30,865 INFO L93 Difference]: Finished difference Result 460 states and 597 transitions. [2021-11-20 05:45:30,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 05:45:30,866 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 05:45:30,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:45:30,868 INFO L225 Difference]: With dead ends: 460 [2021-11-20 05:45:30,868 INFO L226 Difference]: Without dead ends: 460 [2021-11-20 05:45:30,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 76.1s TimeCoverageRelationStatistics Valid=132, Invalid=339, Unknown=35, NotChecked=0, Total=506 [2021-11-20 05:45:30,869 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 57 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 363 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 05:45:30,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 1264 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 193 Invalid, 0 Unknown, 363 Unchecked, 0.8s Time] [2021-11-20 05:45:30,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-20 05:45:30,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 452. [2021-11-20 05:45:30,882 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 05:45:30,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 588 transitions. [2021-11-20 05:45:30,884 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 588 transitions. Word has length 32 [2021-11-20 05:45:30,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:45:30,885 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 588 transitions. [2021-11-20 05:45:30,885 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 05:45:30,885 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 588 transitions. [2021-11-20 05:45:30,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 05:45:30,886 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:45:30,886 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 05:45:30,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-20 05:45:31,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:45:31,098 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 05:45:31,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:45:31,098 INFO L85 PathProgramCache]: Analyzing trace with hash -154246821, now seen corresponding path program 1 times [2021-11-20 05:45:31,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:45:31,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2108280154] [2021-11-20 05:45:31,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:45:31,099 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:45:31,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:45:31,099 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:45:31,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-20 05:45:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:45:31,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 05:45:31,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:45:33,357 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 05:45:33,358 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 05:45:43,602 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 05:45:43,602 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 05:45:44,111 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 05:45:44,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:46:12,651 WARN L227 SmtUtils]: Spent 7.12s 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 05:46:21,398 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 05:46:21,398 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:46:21,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2108280154] [2021-11-20 05:46:21,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2108280154] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:46:21,398 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:46:21,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-11-20 05:46:21,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974087057] [2021-11-20 05:46:21,399 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:46:21,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 05:46:21,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:46:21,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 05:46:21,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=218, Unknown=16, NotChecked=0, Total=306 [2021-11-20 05:46:21,402 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 05:46:32,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:46:32,364 INFO L93 Difference]: Finished difference Result 460 states and 596 transitions. [2021-11-20 05:46:32,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 05:46:32,366 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 05:46:32,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:46:32,368 INFO L225 Difference]: With dead ends: 460 [2021-11-20 05:46:32,368 INFO L226 Difference]: Without dead ends: 460 [2021-11-20 05:46:32,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 57.2s TimeCoverageRelationStatistics Valid=157, Invalid=423, Unknown=20, NotChecked=0, Total=600 [2021-11-20 05:46:32,369 INFO L933 BasicCegarLoop]: 310 mSDtfsCounter, 101 mSDsluCounter, 1178 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 1488 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 622 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:46:32,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 1488 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 541 Invalid, 0 Unknown, 622 Unchecked, 2.3s Time] [2021-11-20 05:46:32,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-20 05:46:32,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 460. [2021-11-20 05:46:32,380 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 05:46:32,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 596 transitions. [2021-11-20 05:46:32,383 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 596 transitions. Word has length 32 [2021-11-20 05:46:32,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:46:32,383 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 596 transitions. [2021-11-20 05:46:32,384 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 05:46:32,384 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 596 transitions. [2021-11-20 05:46:32,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 05:46:32,384 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:46:32,385 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 05:46:32,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-11-20 05:46:32,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:46:32,598 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 05:46:32,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:46:32,599 INFO L85 PathProgramCache]: Analyzing trace with hash 139156186, now seen corresponding path program 1 times [2021-11-20 05:46:32,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:46:32,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1019303952] [2021-11-20 05:46:32,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:46:32,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:46:32,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:46:32,602 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:46:32,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-20 05:46:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:46:32,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:46:32,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:46:32,783 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 05:46:32,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:46:32,856 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 05:46:32,856 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:46:32,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1019303952] [2021-11-20 05:46:32,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1019303952] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:46:32,857 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:46:32,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-20 05:46:32,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42295874] [2021-11-20 05:46:32,857 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:46:32,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:46:32,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:46:32,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:46:32,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:46:32,859 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 05:46:32,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:46:32,897 INFO L93 Difference]: Finished difference Result 483 states and 618 transitions. [2021-11-20 05:46:32,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:46:32,897 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 05:46:32,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:46:32,901 INFO L225 Difference]: With dead ends: 483 [2021-11-20 05:46:32,901 INFO L226 Difference]: Without dead ends: 483 [2021-11-20 05:46:32,902 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 05:46:32,902 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 05:46:32,903 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 05:46:32,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-11-20 05:46:32,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 452. [2021-11-20 05:46:32,915 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 05:46:32,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 586 transitions. [2021-11-20 05:46:32,918 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 586 transitions. Word has length 32 [2021-11-20 05:46:32,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:46:32,918 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 586 transitions. [2021-11-20 05:46:32,918 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 05:46:32,919 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 586 transitions. [2021-11-20 05:46:32,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-20 05:46:32,919 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:46:32,919 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 05:46:32,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-20 05:46:33,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:46:33,133 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 05:46:33,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:46:33,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1682263433, now seen corresponding path program 1 times [2021-11-20 05:46:33,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:46:33,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [194046235] [2021-11-20 05:46:33,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:46:33,134 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:46:33,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:46:33,134 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:46:33,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-20 05:46:33,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:46:33,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:46:33,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:46:33,290 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 05:46:33,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:46:33,387 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 05:46:33,388 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:46:33,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [194046235] [2021-11-20 05:46:33,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [194046235] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:46:33,388 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:46:33,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-11-20 05:46:33,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956940093] [2021-11-20 05:46:33,388 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:46:33,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:46:33,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:46:33,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:46:33,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:46:33,390 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 05:46:33,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:46:33,419 INFO L93 Difference]: Finished difference Result 451 states and 585 transitions. [2021-11-20 05:46:33,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:46:33,420 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 05:46:33,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:46:33,422 INFO L225 Difference]: With dead ends: 451 [2021-11-20 05:46:33,422 INFO L226 Difference]: Without dead ends: 451 [2021-11-20 05:46:33,423 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 05:46:33,423 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 05:46:33,424 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 05:46:33,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-11-20 05:46:33,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 451. [2021-11-20 05:46:33,435 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 05:46:33,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 585 transitions. [2021-11-20 05:46:33,438 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 585 transitions. Word has length 33 [2021-11-20 05:46:33,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:46:33,439 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 585 transitions. [2021-11-20 05:46:33,439 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 05:46:33,439 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 585 transitions. [2021-11-20 05:46:33,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-20 05:46:33,444 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:46:33,444 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 05:46:33,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-20 05:46:33,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:46:33,657 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 05:46:33,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:46:33,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1682263216, now seen corresponding path program 1 times [2021-11-20 05:46:33,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:46:33,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [412352747] [2021-11-20 05:46:33,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:46:33,658 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:46:33,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:46:33,659 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:46:33,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-20 05:46:33,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:46:33,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 05:46:33,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:46:33,859 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 05:46:33,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:46:33,981 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 05:46:33,981 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:46:33,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [412352747] [2021-11-20 05:46:33,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [412352747] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:46:33,982 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:46:33,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-20 05:46:33,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745380012] [2021-11-20 05:46:33,982 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:46:33,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:46:33,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:46:33,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:46:33,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:46:33,984 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 05:46:34,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:46:34,032 INFO L93 Difference]: Finished difference Result 498 states and 628 transitions. [2021-11-20 05:46:34,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:46:34,032 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 05:46:34,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:46:34,036 INFO L225 Difference]: With dead ends: 498 [2021-11-20 05:46:34,036 INFO L226 Difference]: Without dead ends: 498 [2021-11-20 05:46:34,037 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 05:46:34,037 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 05:46:34,038 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 05:46:34,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-11-20 05:46:34,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 449. [2021-11-20 05:46:34,048 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 05:46:34,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 578 transitions. [2021-11-20 05:46:34,051 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 578 transitions. Word has length 33 [2021-11-20 05:46:34,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:46:34,052 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 578 transitions. [2021-11-20 05:46:34,052 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 05:46:34,052 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 578 transitions. [2021-11-20 05:46:34,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-20 05:46:34,053 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:46:34,053 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 05:46:34,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-20 05:46:34,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:46:34,266 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 05:46:34,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:46:34,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1653634065, now seen corresponding path program 1 times [2021-11-20 05:46:34,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:46:34,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [626726592] [2021-11-20 05:46:34,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:46:34,267 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:46:34,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:46:34,268 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:46:34,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-20 05:46:34,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:46:34,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 05:46:34,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:46:34,388 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 05:46:34,531 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 05:46:34,532 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 05:46:34,677 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-11-20 05:46:34,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 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 05:46:34,743 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 05:46:34,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:46:47,089 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_22| (_ BitVec 32)) (|v_ldv_malloc_#res.base_252| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_252|)))) (exists ((|v_ldv_malloc_#res.base_251| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_251|))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (select (store |c_old(#valid)| |v_ldv_malloc_#res.base_251| (_ bv1 1)) |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_22|))) (_ bv1 1)))))) (= (_ bv0 1) (bvadd (bvneg (select (store |c_#valid| |v_ldv_malloc_#res.base_252| (_ bv1 1)) |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_22|)) (_ bv1 1))))) is different from true [2021-11-20 05:46:47,207 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 0 refuted. 2 times theorem prover too weak. 4 trivial. 2 not checked. [2021-11-20 05:46:47,207 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:46:47,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [626726592] [2021-11-20 05:46:47,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [626726592] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:46:47,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:46:47,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-11-20 05:46:47,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329852216] [2021-11-20 05:46:47,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:46:47,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 05:46:47,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:46:47,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 05:46:47,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=73, Unknown=6, NotChecked=18, Total=132 [2021-11-20 05:46:47,209 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 05:46:47,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:46:47,650 INFO L93 Difference]: Finished difference Result 460 states and 589 transitions. [2021-11-20 05:46:47,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 05:46:47,651 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 05:46:47,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:46:47,653 INFO L225 Difference]: With dead ends: 460 [2021-11-20 05:46:47,653 INFO L226 Difference]: Without dead ends: 460 [2021-11-20 05:46:47,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=35, Invalid=73, Unknown=6, NotChecked=18, Total=132 [2021-11-20 05:46:47,654 INFO L933 BasicCegarLoop]: 319 mSDtfsCounter, 71 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 952 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:46:47,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 1190 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 130 Invalid, 0 Unknown, 952 Unchecked, 0.4s Time] [2021-11-20 05:46:47,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-20 05:46:47,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 448. [2021-11-20 05:46:47,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 296 states have (on average 1.7432432432432432) internal successors, (516), 409 states have internal predecessors, (516), 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 05:46:47,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 577 transitions. [2021-11-20 05:46:47,665 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 577 transitions. Word has length 33 [2021-11-20 05:46:47,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:46:47,665 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 577 transitions. [2021-11-20 05:46:47,665 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 05:46:47,666 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 577 transitions. [2021-11-20 05:46:47,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-20 05:46:47,666 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:46:47,666 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 05:46:47,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-20 05:46:47,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:46:47,878 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 05:46:47,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:46:47,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1653634066, now seen corresponding path program 1 times [2021-11-20 05:46:47,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:46:47,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [499706673] [2021-11-20 05:46:47,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:46:47,878 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:46:47,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:46:47,879 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:46:47,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-20 05:46:47,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:46:47,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-20 05:46:47,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:46:48,000 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 05:46:48,008 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 05:46:48,211 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 05:46:48,211 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 05:46:48,251 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 05:46:48,251 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 05:46:48,493 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 05:46:48,494 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 05:46:48,548 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-11-20 05:46:48,548 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 05:46:51,077 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 05:46:51,077 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 05:46:51,120 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-11-20 05:46:51,120 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 05:46:51,172 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 05:46:51,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:47:07,399 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 05:47:14,834 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 05:49:15,240 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 05:49:15,240 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 05:49:16,092 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 4 times theorem prover too weak. 0 trivial. 11 not checked. [2021-11-20 05:49:16,093 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:49:16,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [499706673] [2021-11-20 05:49:16,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [499706673] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:49:16,093 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:49:16,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 25 [2021-11-20 05:49:16,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313692311] [2021-11-20 05:49:16,093 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:49:16,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 05:49:16,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:49:16,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 05:49:16,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=447, Unknown=25, NotChecked=90, Total=650 [2021-11-20 05:49:16,094 INFO L87 Difference]: Start difference. First operand 448 states and 577 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 05:49:30,431 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_old(#valid)| |c_#valid|) (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 05:49:32,445 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 05:49:34,462 WARN L838 $PredicateComparison]: unable to prove that (and (= (select |c_#length| |c_ldv_malloc_#res.base|) |c_ldv_malloc_#in~size|) (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|)))))))))))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| |c_ldv_malloc_#res.base|))) (= |c_ldv_malloc_#res.offset| (_ bv0 32)) (exists ((ldv_malloc_~size (_ BitVec 32)) (|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (= (store |c_old(#valid)| |ldv_malloc_#res.base| (_ bv1 1)) |c_#valid|) (= (store |c_old(#length)| |ldv_malloc_#res.base| ldv_malloc_~size) |c_#length|)))) is different from false [2021-11-20 05:49:36,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:49:36,418 INFO L93 Difference]: Finished difference Result 455 states and 585 transitions. [2021-11-20 05:49:36,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 05:49:36,419 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 05:49:36,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:49:36,422 INFO L225 Difference]: With dead ends: 455 [2021-11-20 05:49:36,422 INFO L226 Difference]: Without dead ends: 455 [2021-11-20 05:49:36,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 79.3s TimeCoverageRelationStatistics Valid=119, Invalid=570, Unknown=33, NotChecked=270, Total=992 [2021-11-20 05:49:36,423 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 68 mSDsluCounter, 2765 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 3070 SdHoareTripleChecker+Invalid, 2385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1681 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 05:49:36,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 3070 Invalid, 2385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 686 Invalid, 0 Unknown, 1681 Unchecked, 1.9s Time] [2021-11-20 05:49:36,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-11-20 05:49:36,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 447. [2021-11-20 05:49:36,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 296 states have (on average 1.739864864864865) internal successors, (515), 408 states have internal predecessors, (515), 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 05:49:36,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 576 transitions. [2021-11-20 05:49:36,436 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 576 transitions. Word has length 33 [2021-11-20 05:49:36,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:49:36,437 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 576 transitions. [2021-11-20 05:49:36,437 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 05:49:36,437 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 576 transitions. [2021-11-20 05:49:36,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-20 05:49:36,438 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:49:36,438 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 05:49:36,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-11-20 05:49:36,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:49:36,649 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 05:49:36,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:49:36,650 INFO L85 PathProgramCache]: Analyzing trace with hash 610559287, now seen corresponding path program 1 times [2021-11-20 05:49:36,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:49:36,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1896681332] [2021-11-20 05:49:36,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:36,650 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:49:36,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:49:36,651 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:49:36,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-20 05:49:36,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:36,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 05:49:36,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:49:37,164 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 05:49:37,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:49:37,319 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 05:49:37,319 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:49:37,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1896681332] [2021-11-20 05:49:37,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1896681332] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:49:37,319 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:49:37,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-11-20 05:49:37,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51193710] [2021-11-20 05:49:37,320 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:49:37,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 05:49:37,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:49:37,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 05:49:37,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:49:37,321 INFO L87 Difference]: Start difference. First operand 447 states and 576 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 05:49:37,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:49:37,342 INFO L93 Difference]: Finished difference Result 455 states and 583 transitions. [2021-11-20 05:49:37,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:49:37,343 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 05:49:37,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:49:37,345 INFO L225 Difference]: With dead ends: 455 [2021-11-20 05:49:37,346 INFO L226 Difference]: Without dead ends: 455 [2021-11-20 05:49:37,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:49:37,347 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 23 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:49:37,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 981 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 53 Unchecked, 0.0s Time] [2021-11-20 05:49:37,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-11-20 05:49:37,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 455. [2021-11-20 05:49:37,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 302 states have (on average 1.728476821192053) internal successors, (522), 415 states have internal predecessors, (522), 25 states have call successors, (25), 16 states have call predecessors, (25), 21 states have return successors, (36), 27 states have call predecessors, (36), 25 states have call successors, (36) [2021-11-20 05:49:37,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 583 transitions. [2021-11-20 05:49:37,358 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 583 transitions. Word has length 34 [2021-11-20 05:49:37,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:49:37,359 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 583 transitions. [2021-11-20 05:49:37,359 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 05:49:37,359 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 583 transitions. [2021-11-20 05:49:37,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-20 05:49:37,359 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:49:37,360 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 05:49:37,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-20 05:49:37,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:49:37,573 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 05:49:37,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:49:37,573 INFO L85 PathProgramCache]: Analyzing trace with hash 2092671515, now seen corresponding path program 1 times [2021-11-20 05:49:37,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:49:37,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1973777971] [2021-11-20 05:49:37,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:37,574 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:49:37,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:49:37,575 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:49:37,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-20 05:49:37,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:37,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 05:49:37,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:49:37,885 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-20 05:49:37,886 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 05:49:38,062 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 05:49:38,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 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 05:49:38,266 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 05:49:38,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:49:38,383 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-11-20 05:49:38,383 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 05:49:38,713 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 05:49:38,713 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:49:38,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1973777971] [2021-11-20 05:49:38,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1973777971] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 05:49:38,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:49:38,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2021-11-20 05:49:38,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793714433] [2021-11-20 05:49:38,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:49:38,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:49:38,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:49:38,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:49:38,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-11-20 05:49:38,715 INFO L87 Difference]: Start difference. First operand 455 states and 583 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 05:49:40,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:49:40,737 INFO L93 Difference]: Finished difference Result 495 states and 624 transitions. [2021-11-20 05:49:40,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:49:40,739 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 05:49:40,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:49:40,741 INFO L225 Difference]: With dead ends: 495 [2021-11-20 05:49:40,741 INFO L226 Difference]: Without dead ends: 495 [2021-11-20 05:49:40,741 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 05:49:40,742 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 91 mSDsluCounter, 1406 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s 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, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 05:49:40,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 1721 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-20 05:49:40,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-11-20 05:49:40,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 457. [2021-11-20 05:49:40,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 304 states have (on average 1.7269736842105263) internal successors, (525), 417 states have internal predecessors, (525), 25 states have call successors, (25), 16 states have call predecessors, (25), 21 states have return successors, (36), 27 states have call predecessors, (36), 25 states have call successors, (36) [2021-11-20 05:49:40,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 586 transitions. [2021-11-20 05:49:40,753 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 586 transitions. Word has length 34 [2021-11-20 05:49:40,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:49:40,753 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 586 transitions. [2021-11-20 05:49:40,754 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 05:49:40,754 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 586 transitions. [2021-11-20 05:49:40,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-20 05:49:40,754 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:49:40,755 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 05:49:40,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-20 05:49:40,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:49:40,966 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 05:49:40,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:49:40,967 INFO L85 PathProgramCache]: Analyzing trace with hash 2092671516, now seen corresponding path program 1 times [2021-11-20 05:49:40,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:49:40,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [600618869] [2021-11-20 05:49:40,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:40,967 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:49:40,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:49:40,968 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:49:40,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-20 05:49:41,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:41,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 05:49:41,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:49:41,407 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-20 05:49:41,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 05:49:41,440 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-20 05:49:41,441 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 05:49:41,718 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 05:49:41,841 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 05:49:41,846 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 05:49:41,855 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 05:49:41,855 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 05:49:41,912 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 05:49:41,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:49:42,067 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:49:42,068 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 05:49:42,331 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 05:49:43,187 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 05:49:43,187 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:49:43,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [600618869] [2021-11-20 05:49:43,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [600618869] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 05:49:43,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:49:43,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2021-11-20 05:49:43,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165542343] [2021-11-20 05:49:43,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:49:43,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:49:43,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:49:43,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:49:43,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-11-20 05:49:43,188 INFO L87 Difference]: Start difference. First operand 457 states and 586 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 05:49:46,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:49:46,900 INFO L93 Difference]: Finished difference Result 495 states and 624 transitions. [2021-11-20 05:49:46,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:49:46,902 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 05:49:46,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:49:46,905 INFO L225 Difference]: With dead ends: 495 [2021-11-20 05:49:46,905 INFO L226 Difference]: Without dead ends: 495 [2021-11-20 05:49:46,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-11-20 05:49:46,906 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 113 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s 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, 3.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:49:46,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 1502 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-20 05:49:46,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-11-20 05:49:46,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 457. [2021-11-20 05:49:46,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 304 states have (on average 1.7236842105263157) internal successors, (524), 417 states have internal predecessors, (524), 25 states have call successors, (25), 16 states have call predecessors, (25), 21 states have return successors, (36), 27 states have call predecessors, (36), 25 states have call successors, (36) [2021-11-20 05:49:46,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 585 transitions. [2021-11-20 05:49:46,918 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 585 transitions. Word has length 34 [2021-11-20 05:49:46,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:49:46,919 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 585 transitions. [2021-11-20 05:49:46,919 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 05:49:46,919 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 585 transitions. [2021-11-20 05:49:46,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 05:49:46,920 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:49:46,920 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 05:49:46,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2021-11-20 05:49:47,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:49:47,132 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 05:49:47,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:49:47,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1747469131, now seen corresponding path program 1 times [2021-11-20 05:49:47,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:49:47,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [440151085] [2021-11-20 05:49:47,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:47,133 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:49:47,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:49:47,133 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:49:47,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-20 05:49:47,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:47,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 05:49:47,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:49:47,247 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 05:49:47,318 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 05:49:47,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:49:47,469 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 05:49:47,469 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:49:47,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [440151085] [2021-11-20 05:49:47,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [440151085] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:49:47,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:49:47,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-20 05:49:47,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645373539] [2021-11-20 05:49:47,470 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:49:47,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:49:47,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:49:47,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:49:47,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:49:47,471 INFO L87 Difference]: Start difference. First operand 457 states and 585 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 05:49:49,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:49:49,058 INFO L93 Difference]: Finished difference Result 462 states and 590 transitions. [2021-11-20 05:49:49,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:49:49,059 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 05:49:49,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:49:49,061 INFO L225 Difference]: With dead ends: 462 [2021-11-20 05:49:49,061 INFO L226 Difference]: Without dead ends: 462 [2021-11-20 05:49:49,061 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 05:49:49,062 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 41 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1189 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:49:49,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 1189 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 614 Invalid, 0 Unknown, 124 Unchecked, 1.6s Time] [2021-11-20 05:49:49,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-20 05:49:49,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 460. [2021-11-20 05:49:49,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 307 states have (on average 1.716612377850163) internal successors, (527), 420 states have internal predecessors, (527), 25 states have call successors, (25), 16 states have call predecessors, (25), 21 states have return successors, (36), 27 states have call predecessors, (36), 25 states have call successors, (36) [2021-11-20 05:49:49,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 588 transitions. [2021-11-20 05:49:49,083 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 588 transitions. Word has length 35 [2021-11-20 05:49:49,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:49:49,083 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 588 transitions. [2021-11-20 05:49:49,083 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 05:49:49,084 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 588 transitions. [2021-11-20 05:49:49,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 05:49:49,084 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:49:49,084 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 05:49:49,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-20 05:49:49,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:49:49,295 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 05:49:49,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:49:49,296 INFO L85 PathProgramCache]: Analyzing trace with hash 4658796, now seen corresponding path program 1 times [2021-11-20 05:49:49,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:49:49,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2126473260] [2021-11-20 05:49:49,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:49,296 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:49:49,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:49:49,297 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:49:49,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-20 05:49:49,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:49,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:49:49,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:49:49,456 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 05:49:49,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:49:49,526 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 05:49:49,526 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:49:49,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2126473260] [2021-11-20 05:49:49,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2126473260] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:49:49,526 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:49:49,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-20 05:49:49,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983782735] [2021-11-20 05:49:49,526 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:49:49,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:49:49,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:49:49,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:49:49,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:49:49,528 INFO L87 Difference]: Start difference. First operand 460 states and 588 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 05:49:49,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:49:49,562 INFO L93 Difference]: Finished difference Result 502 states and 630 transitions. [2021-11-20 05:49:49,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:49:49,563 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 05:49:49,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:49:49,565 INFO L225 Difference]: With dead ends: 502 [2021-11-20 05:49:49,565 INFO L226 Difference]: Without dead ends: 502 [2021-11-20 05:49:49,565 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 05:49:49,565 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 05:49:49,566 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 05:49:49,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-11-20 05:49:49,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 458. [2021-11-20 05:49:49,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 305 states have (on average 1.7180327868852459) internal successors, (524), 418 states have internal predecessors, (524), 25 states have call successors, (25), 16 states have call predecessors, (25), 21 states have return successors, (36), 27 states have call predecessors, (36), 25 states have call successors, (36) [2021-11-20 05:49:49,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 585 transitions. [2021-11-20 05:49:49,574 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 585 transitions. Word has length 35 [2021-11-20 05:49:49,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:49:49,574 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 585 transitions. [2021-11-20 05:49:49,574 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 05:49:49,574 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 585 transitions. [2021-11-20 05:49:49,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 05:49:49,574 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:49:49,575 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 05:49:49,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-20 05:49:49,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:49:49,775 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 05:49:49,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:49:49,776 INFO L85 PathProgramCache]: Analyzing trace with hash -14364371, now seen corresponding path program 1 times [2021-11-20 05:49:49,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:49:49,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1817674173] [2021-11-20 05:49:49,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:49,776 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:49:49,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:49:49,777 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:49:49,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-20 05:49:49,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:49,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 05:49:49,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:49:50,404 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 05:49:50,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:49:50,579 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 05:49:50,579 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:49:50,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1817674173] [2021-11-20 05:49:50,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1817674173] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:49:50,579 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:49:50,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-11-20 05:49:50,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138459256] [2021-11-20 05:49:50,579 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:49:50,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 05:49:50,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:49:50,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 05:49:50,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:49:50,581 INFO L87 Difference]: Start difference. First operand 458 states and 585 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 05:49:50,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:49:50,736 INFO L93 Difference]: Finished difference Result 612 states and 767 transitions. [2021-11-20 05:49:50,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:49:50,737 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 05:49:50,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:49:50,740 INFO L225 Difference]: With dead ends: 612 [2021-11-20 05:49:50,740 INFO L226 Difference]: Without dead ends: 612 [2021-11-20 05:49:50,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:49:50,740 INFO L933 BasicCegarLoop]: 494 mSDtfsCounter, 176 mSDsluCounter, 1507 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 2001 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:49:50,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 2001 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 81 Invalid, 0 Unknown, 75 Unchecked, 0.1s Time] [2021-11-20 05:49:50,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-11-20 05:49:50,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 482. [2021-11-20 05:49:50,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 326 states have (on average 1.7085889570552146) internal successors, (557), 439 states have internal predecessors, (557), 27 states have call successors, (27), 17 states have call predecessors, (27), 22 states have return successors, (38), 29 states have call predecessors, (38), 27 states have call successors, (38) [2021-11-20 05:49:50,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 622 transitions. [2021-11-20 05:49:50,751 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 622 transitions. Word has length 37 [2021-11-20 05:49:50,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:49:50,752 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 622 transitions. [2021-11-20 05:49:50,752 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 05:49:50,752 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 622 transitions. [2021-11-20 05:49:50,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 05:49:50,753 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:49:50,753 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 05:49:50,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-20 05:49:50,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:49:50,964 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 05:49:50,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:49:50,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1327181508, now seen corresponding path program 1 times [2021-11-20 05:49:50,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:49:50,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [305313065] [2021-11-20 05:49:50,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:50,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:49:50,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:49:50,966 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:49:50,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-20 05:49:51,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:51,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:49:51,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:49:51,123 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 05:49:51,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:49:51,185 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 05:49:51,185 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:49:51,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [305313065] [2021-11-20 05:49:51,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [305313065] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:49:51,185 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:49:51,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 05:49:51,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605123417] [2021-11-20 05:49:51,185 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:49:51,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:49:51,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:49:51,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:49:51,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:49:51,186 INFO L87 Difference]: Start difference. First operand 482 states and 622 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 05:49:51,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:49:51,668 INFO L93 Difference]: Finished difference Result 500 states and 641 transitions. [2021-11-20 05:49:51,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:49:51,670 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 05:49:51,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:49:51,672 INFO L225 Difference]: With dead ends: 500 [2021-11-20 05:49:51,672 INFO L226 Difference]: Without dead ends: 500 [2021-11-20 05:49:51,673 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 05:49:51,673 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 05:49:51,674 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 05:49:51,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-11-20 05:49:51,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 483. [2021-11-20 05:49:51,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 328 states have (on average 1.7073170731707317) internal successors, (560), 440 states have internal predecessors, (560), 27 states have call successors, (27), 17 states have call predecessors, (27), 22 states have return successors, (38), 29 states have call predecessors, (38), 27 states have call successors, (38) [2021-11-20 05:49:51,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 625 transitions. [2021-11-20 05:49:51,683 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 625 transitions. Word has length 37 [2021-11-20 05:49:51,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:49:51,683 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 625 transitions. [2021-11-20 05:49:51,683 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 05:49:51,683 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 625 transitions. [2021-11-20 05:49:51,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 05:49:51,684 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:49:51,684 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 05:49:51,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-20 05:49:51,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:49:51,884 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 05:49:51,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:49:51,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1327181509, now seen corresponding path program 1 times [2021-11-20 05:49:51,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:49:51,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [591469107] [2021-11-20 05:49:51,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:51,886 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:49:51,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:49:51,887 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:49:51,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-20 05:49:51,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:51,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 05:49:51,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:49:52,345 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-20 05:49:52,345 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 05:49:52,379 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-20 05:49:52,379 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 05:49:52,653 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 05:49:52,777 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 05:49:52,781 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 05:49:52,790 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 05:49:52,791 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 05:49:52,891 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 05:49:52,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:49:53,042 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 05:49:53,386 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 05:49:53,386 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:49:53,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [591469107] [2021-11-20 05:49:53,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [591469107] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 05:49:53,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 05:49:53,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2021-11-20 05:49:53,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980787678] [2021-11-20 05:49:53,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:49:53,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:49:53,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:49:53,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:49:53,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-11-20 05:49:53,387 INFO L87 Difference]: Start difference. First operand 483 states and 625 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 05:49:54,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:49:54,526 INFO L93 Difference]: Finished difference Result 489 states and 630 transitions. [2021-11-20 05:49:54,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:49:54,527 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 05:49:54,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:49:54,532 INFO L225 Difference]: With dead ends: 489 [2021-11-20 05:49:54,532 INFO L226 Difference]: Without dead ends: 489 [2021-11-20 05:49:54,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-11-20 05:49:54,533 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 54 mSDsluCounter, 1348 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1672 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:49:54,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 1672 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 05:49:54,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-11-20 05:49:54,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 485. [2021-11-20 05:49:54,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 330 states have (on average 1.7030303030303031) internal successors, (562), 442 states have internal predecessors, (562), 27 states have call successors, (27), 17 states have call predecessors, (27), 22 states have return successors, (38), 29 states have call predecessors, (38), 27 states have call successors, (38) [2021-11-20 05:49:54,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 627 transitions. [2021-11-20 05:49:54,543 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 627 transitions. Word has length 37 [2021-11-20 05:49:54,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:49:54,543 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 627 transitions. [2021-11-20 05:49:54,543 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 05:49:54,543 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 627 transitions. [2021-11-20 05:49:54,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 05:49:54,544 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:49:54,544 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 05:49:54,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-20 05:49:54,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:49:54,752 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 05:49:54,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:49:54,752 INFO L85 PathProgramCache]: Analyzing trace with hash -445295076, now seen corresponding path program 1 times [2021-11-20 05:49:54,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:49:54,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1881413793] [2021-11-20 05:49:54,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:54,752 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:49:54,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:49:54,753 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:49:54,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-20 05:49:54,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:54,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 05:49:54,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:49:54,861 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 05:49:54,962 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 05:49:54,962 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 05:49:55,232 INFO L354 Elim1Store]: treesize reduction 20, result has 28.6 percent of original size [2021-11-20 05:49:55,232 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 05:49:55,353 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 05:49:55,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:49:57,815 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 05:49:57,815 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:49:57,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1881413793] [2021-11-20 05:49:57,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1881413793] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:49:57,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:49:57,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-11-20 05:49:57,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112042591] [2021-11-20 05:49:57,816 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:49:57,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 05:49:57,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:49:57,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 05:49:57,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=170, Unknown=1, NotChecked=0, Total=210 [2021-11-20 05:49:57,817 INFO L87 Difference]: Start difference. First operand 485 states and 627 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 05:49:58,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:49:58,856 INFO L93 Difference]: Finished difference Result 514 states and 656 transitions. [2021-11-20 05:49:58,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 05:49:58,857 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 05:49:58,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:49:58,859 INFO L225 Difference]: With dead ends: 514 [2021-11-20 05:49:58,859 INFO L226 Difference]: Without dead ends: 514 [2021-11-20 05:49:58,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 54 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=43, Invalid=196, Unknown=1, NotChecked=0, Total=240 [2021-11-20 05:49:58,860 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 90 mSDsluCounter, 1579 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 1887 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 474 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:49:58,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 1887 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 659 Invalid, 0 Unknown, 474 Unchecked, 1.0s Time] [2021-11-20 05:49:58,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-11-20 05:49:58,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 486. [2021-11-20 05:49:58,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 331 states have (on average 1.700906344410876) internal successors, (563), 443 states have internal predecessors, (563), 27 states have call successors, (27), 17 states have call predecessors, (27), 22 states have return successors, (38), 29 states have call predecessors, (38), 27 states have call successors, (38) [2021-11-20 05:49:58,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 628 transitions. [2021-11-20 05:49:58,868 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 628 transitions. Word has length 38 [2021-11-20 05:49:58,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:49:58,868 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 628 transitions. [2021-11-20 05:49:58,868 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 05:49:58,869 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 628 transitions. [2021-11-20 05:49:58,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 05:49:58,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:49:58,869 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 05:49:58,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-20 05:49:59,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:49:59,070 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 05:49:59,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:49:59,070 INFO L85 PathProgramCache]: Analyzing trace with hash -183877918, now seen corresponding path program 1 times [2021-11-20 05:49:59,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:49:59,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [811655351] [2021-11-20 05:49:59,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:49:59,070 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:49:59,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:49:59,071 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:49:59,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-20 05:49:59,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:49:59,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 05:49:59,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:50:01,909 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 05:50:01,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:50:02,154 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 05:50:05,038 WARN L838 $PredicateComparison]: unable to prove that (forall ((|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| |c_ldv_malloc_#res.base| (_ bv0 1)))) (or (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 (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_44|)))))))) (not (= |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_44| (_ bv0 32)))) (= (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 05:50:06,464 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 05:50:14,437 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))) (let ((.cse0 (store |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret66#1.base_121| (_ bv0 1)))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret66#1.base_121|)))) (and (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse0 |c_ldv_malloc_#res.base|))))))) (_ bv1 1)))) (not (= |c_ldv_malloc_#res.base| (_ 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|))))))))) (= |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_12| (store .cse0 |c_ldv_malloc_#res.base| (_ bv0 1)))))) is different from false [2021-11-20 05:50:14,931 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 05:50:15,128 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 12 not checked. [2021-11-20 05:50:15,129 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:50:15,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [811655351] [2021-11-20 05:50:15,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [811655351] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:50:15,129 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:50:15,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-11-20 05:50:15,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232922333] [2021-11-20 05:50:15,129 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:50:15,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 05:50:15,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:50:15,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 05:50:15,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=294, Unknown=7, NotChecked=148, Total=506 [2021-11-20 05:50:15,131 INFO L87 Difference]: Start difference. First operand 486 states and 628 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 05:50:19,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:50:19,826 INFO L93 Difference]: Finished difference Result 493 states and 635 transitions. [2021-11-20 05:50:19,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 05:50:19,827 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 05:50:19,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:50:19,829 INFO L225 Difference]: With dead ends: 493 [2021-11-20 05:50:19,829 INFO L226 Difference]: Without dead ends: 474 [2021-11-20 05:50:19,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=70, Invalid=359, Unknown=7, NotChecked=164, Total=600 [2021-11-20 05:50:19,830 INFO L933 BasicCegarLoop]: 306 mSDtfsCounter, 51 mSDsluCounter, 3008 mSDsCounter, 0 mSdLazyCounter, 1573 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 3314 SdHoareTripleChecker+Invalid, 2954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1363 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:50:19,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 3314 Invalid, 2954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1573 Invalid, 0 Unknown, 1363 Unchecked, 4.5s Time] [2021-11-20 05:50:19,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-11-20 05:50:19,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 470. [2021-11-20 05:50:19,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 316 states have (on average 1.731012658227848) internal successors, (547), 428 states have internal predecessors, (547), 27 states have call successors, (27), 17 states have call predecessors, (27), 21 states have return successors, (37), 28 states have call predecessors, (37), 27 states have call successors, (37) [2021-11-20 05:50:19,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 611 transitions. [2021-11-20 05:50:19,841 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 611 transitions. Word has length 39 [2021-11-20 05:50:19,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:50:19,841 INFO L470 AbstractCegarLoop]: Abstraction has 470 states and 611 transitions. [2021-11-20 05:50:19,841 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 05:50:19,841 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 611 transitions. [2021-11-20 05:50:19,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 05:50:19,842 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:50:19,842 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 05:50:19,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-20 05:50:20,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:50:20,055 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 05:50:20,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:50:20,055 INFO L85 PathProgramCache]: Analyzing trace with hash -789046789, now seen corresponding path program 1 times [2021-11-20 05:50:20,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:50:20,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [578030203] [2021-11-20 05:50:20,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:50:20,055 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:50:20,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:50:20,056 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:50:20,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-20 05:50:20,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:20,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 05:50:20,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:50:20,249 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 05:50:20,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:50:20,359 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 05:50:20,359 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:50:20,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [578030203] [2021-11-20 05:50:20,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [578030203] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:50:20,359 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:50:20,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-20 05:50:20,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741743763] [2021-11-20 05:50:20,360 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:50:20,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:50:20,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:50:20,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:50:20,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:50:20,361 INFO L87 Difference]: Start difference. First operand 470 states and 611 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 05:50:20,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:50:20,397 INFO L93 Difference]: Finished difference Result 520 states and 654 transitions. [2021-11-20 05:50:20,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:50:20,397 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 05:50:20,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:50:20,400 INFO L225 Difference]: With dead ends: 520 [2021-11-20 05:50:20,400 INFO L226 Difference]: Without dead ends: 520 [2021-11-20 05:50:20,400 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 05:50:20,400 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 05:50:20,401 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 05:50:20,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-11-20 05:50:20,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 462. [2021-11-20 05:50:20,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 309 states have (on average 1.7184466019417475) internal successors, (531), 420 states have internal predecessors, (531), 26 states have call successors, (26), 17 states have call predecessors, (26), 21 states have return successors, (35), 28 states have call predecessors, (35), 26 states have call successors, (35) [2021-11-20 05:50:20,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 592 transitions. [2021-11-20 05:50:20,411 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 592 transitions. Word has length 41 [2021-11-20 05:50:20,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:50:20,411 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 592 transitions. [2021-11-20 05:50:20,411 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 05:50:20,411 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 592 transitions. [2021-11-20 05:50:20,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 05:50:20,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:50:20,412 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 05:50:20,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-20 05:50:20,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:50:20,624 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 05:50:20,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:50:20,624 INFO L85 PathProgramCache]: Analyzing trace with hash -789046589, now seen corresponding path program 1 times [2021-11-20 05:50:20,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:50:20,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [920218520] [2021-11-20 05:50:20,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:50:20,624 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:50:20,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:50:20,625 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:50:20,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-20 05:50:20,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:20,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:50:20,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:50:20,790 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 05:50:20,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:50:20,869 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 05:50:20,870 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:50:20,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [920218520] [2021-11-20 05:50:20,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [920218520] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:50:20,870 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:50:20,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-11-20 05:50:20,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364015908] [2021-11-20 05:50:20,870 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:50:20,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:50:20,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:50:20,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:50:20,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:50:20,872 INFO L87 Difference]: Start difference. First operand 462 states and 592 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 05:50:20,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:50:20,897 INFO L93 Difference]: Finished difference Result 461 states and 591 transitions. [2021-11-20 05:50:20,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:50:20,897 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 05:50:20,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:50:20,899 INFO L225 Difference]: With dead ends: 461 [2021-11-20 05:50:20,899 INFO L226 Difference]: Without dead ends: 461 [2021-11-20 05:50:20,899 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 05:50:20,900 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 05:50:20,900 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 05:50:20,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-11-20 05:50:20,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 461. [2021-11-20 05:50:20,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 309 states have (on average 1.715210355987055) internal successors, (530), 419 states have internal predecessors, (530), 26 states have call successors, (26), 17 states have call predecessors, (26), 21 states have return successors, (35), 28 states have call predecessors, (35), 26 states have call successors, (35) [2021-11-20 05:50:20,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 591 transitions. [2021-11-20 05:50:20,910 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 591 transitions. Word has length 41 [2021-11-20 05:50:20,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:50:20,910 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 591 transitions. [2021-11-20 05:50:20,910 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 05:50:20,910 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 591 transitions. [2021-11-20 05:50:20,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 05:50:20,911 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:50:20,911 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 05:50:20,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-11-20 05:50:21,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:50:21,123 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 05:50:21,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:50:21,123 INFO L85 PathProgramCache]: Analyzing trace with hash -817675940, now seen corresponding path program 1 times [2021-11-20 05:50:21,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:50:21,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1893886056] [2021-11-20 05:50:21,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:50:21,124 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:50:21,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:50:21,124 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:50:21,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-20 05:50:21,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:21,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 05:50:21,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:50:21,275 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 05:50:21,368 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-20 05:50:21,368 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 05:50:21,385 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 05:50:21,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:50:21,550 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 05:50:21,551 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:50:21,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1893886056] [2021-11-20 05:50:21,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1893886056] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:50:21,551 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:50:21,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 3] imperfect sequences [] total 6 [2021-11-20 05:50:21,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72371878] [2021-11-20 05:50:21,552 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:50:21,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:50:21,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:50:21,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:50:21,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:50:21,553 INFO L87 Difference]: Start difference. First operand 461 states and 591 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 05:50:21,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:50:21,806 INFO L93 Difference]: Finished difference Result 563 states and 707 transitions. [2021-11-20 05:50:21,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:50:21,806 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 05:50:21,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:50:21,809 INFO L225 Difference]: With dead ends: 563 [2021-11-20 05:50:21,809 INFO L226 Difference]: Without dead ends: 563 [2021-11-20 05:50:21,810 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 05:50:21,810 INFO L933 BasicCegarLoop]: 384 mSDtfsCounter, 142 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 446 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:50:21,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 1065 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 116 Invalid, 0 Unknown, 446 Unchecked, 0.2s Time] [2021-11-20 05:50:21,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-11-20 05:50:21,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 514. [2021-11-20 05:50:21,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 353 states have (on average 1.7053824362606231) internal successors, (602), 465 states have internal predecessors, (602), 32 states have call successors, (32), 22 states have call predecessors, (32), 27 states have return successors, (44), 32 states have call predecessors, (44), 32 states have call successors, (44) [2021-11-20 05:50:21,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 678 transitions. [2021-11-20 05:50:21,822 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 678 transitions. Word has length 41 [2021-11-20 05:50:21,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:50:21,822 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 678 transitions. [2021-11-20 05:50:21,822 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 05:50:21,823 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 678 transitions. [2021-11-20 05:50:21,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 05:50:21,823 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:50:21,823 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 05:50:21,850 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (46)] Ended with exit code 0 [2021-11-20 05:50:22,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:50:22,035 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 05:50:22,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:50:22,036 INFO L85 PathProgramCache]: Analyzing trace with hash -817675939, now seen corresponding path program 1 times [2021-11-20 05:50:22,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:50:22,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [974314737] [2021-11-20 05:50:22,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:50:22,036 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:50:22,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:50:22,037 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:50:22,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-20 05:50:22,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:22,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 05:50:22,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:50:22,224 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 05:50:24,383 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 05:50:24,383 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 05:50:24,392 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 05:50:24,392 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 05:50:24,438 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 05:50:24,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:50:28,170 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 05:50:28,759 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 05:50:28,760 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 05:50:31,642 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 05:50:32,385 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 05:50:32,385 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:50:32,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [974314737] [2021-11-20 05:50:32,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [974314737] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:50:32,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:50:32,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-11-20 05:50:32,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628666616] [2021-11-20 05:50:32,386 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:50:32,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 05:50:32,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:50:32,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 05:50:32,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=194, Unknown=3, NotChecked=28, Total=272 [2021-11-20 05:50:32,387 INFO L87 Difference]: Start difference. First operand 514 states and 678 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 05:50:42,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:50:42,597 INFO L93 Difference]: Finished difference Result 698 states and 835 transitions. [2021-11-20 05:50:42,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:50:42,597 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 05:50:42,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:50:42,601 INFO L225 Difference]: With dead ends: 698 [2021-11-20 05:50:42,601 INFO L226 Difference]: Without dead ends: 698 [2021-11-20 05:50:42,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=58, Invalid=246, Unknown=6, NotChecked=32, Total=342 [2021-11-20 05:50:42,602 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 553 mSDsluCounter, 1955 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 2243 SdHoareTripleChecker+Invalid, 2257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1208 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:50:42,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [563 Valid, 2243 Invalid, 2257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 994 Invalid, 0 Unknown, 1208 Unchecked, 4.0s Time] [2021-11-20 05:50:42,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2021-11-20 05:50:42,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 513. [2021-11-20 05:50:42,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 353 states have (on average 1.7025495750708215) internal successors, (601), 464 states have internal predecessors, (601), 32 states have call successors, (32), 22 states have call predecessors, (32), 27 states have return successors, (44), 32 states have call predecessors, (44), 32 states have call successors, (44) [2021-11-20 05:50:42,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 677 transitions. [2021-11-20 05:50:42,612 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 677 transitions. Word has length 41 [2021-11-20 05:50:42,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:50:42,612 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 677 transitions. [2021-11-20 05:50:42,612 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 05:50:42,613 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 677 transitions. [2021-11-20 05:50:42,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 05:50:42,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:50:42,613 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 05:50:42,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-11-20 05:50:42,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:50:42,825 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 05:50:42,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:50:42,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1368793298, now seen corresponding path program 1 times [2021-11-20 05:50:42,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:50:42,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1285440250] [2021-11-20 05:50:42,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:50:42,826 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:50:42,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:50:42,826 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:50:42,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-20 05:50:42,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:50:42,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-20 05:50:42,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:50:42,958 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 05:50:43,083 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 05:50:43,083 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 05:50:43,284 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-11-20 05:50:43,284 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 05:50:43,850 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-11-20 05:50:43,851 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 05:50:44,102 INFO L354 Elim1Store]: treesize reduction 46, result has 27.0 percent of original size [2021-11-20 05:50:44,102 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 05:50:44,299 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 05:50:44,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:51:16,285 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 05:51:30,014 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 05:51:30,014 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:51:30,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1285440250] [2021-11-20 05:51:30,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1285440250] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:51:30,014 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:51:30,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-11-20 05:51:30,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481890557] [2021-11-20 05:51:30,014 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:51:30,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 05:51:30,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:51:30,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 05:51:30,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=528, Unknown=14, NotChecked=48, Total=702 [2021-11-20 05:51:30,016 INFO L87 Difference]: Start difference. First operand 513 states and 677 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 05:51:32,051 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 05:51:32,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:51:32,668 INFO L93 Difference]: Finished difference Result 518 states and 683 transitions. [2021-11-20 05:51:32,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 05:51:32,669 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 05:51:32,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:51:32,672 INFO L225 Difference]: With dead ends: 518 [2021-11-20 05:51:32,672 INFO L226 Difference]: Without dead ends: 518 [2021-11-20 05:51:32,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 47.1s TimeCoverageRelationStatistics Valid=114, Invalid=529, Unknown=15, NotChecked=98, Total=756 [2021-11-20 05:51:32,673 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 17 mSDsluCounter, 2275 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 2592 SdHoareTripleChecker+Invalid, 1649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1261 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:51:32,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 2592 Invalid, 1649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 387 Invalid, 0 Unknown, 1261 Unchecked, 0.6s Time] [2021-11-20 05:51:32,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-11-20 05:51:32,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 516. [2021-11-20 05:51:32,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 356 states have (on average 1.696629213483146) internal successors, (604), 467 states have internal predecessors, (604), 32 states have call successors, (32), 22 states have call predecessors, (32), 27 states have return successors, (44), 32 states have call predecessors, (44), 32 states have call successors, (44) [2021-11-20 05:51:32,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 680 transitions. [2021-11-20 05:51:32,684 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 680 transitions. Word has length 41 [2021-11-20 05:51:32,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:51:32,684 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 680 transitions. [2021-11-20 05:51:32,684 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 05:51:32,684 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 680 transitions. [2021-11-20 05:51:32,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 05:51:32,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:51:32,685 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 05:51:32,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-11-20 05:51:32,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:51:32,896 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 05:51:32,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:51:32,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1309359926, now seen corresponding path program 1 times [2021-11-20 05:51:32,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:51:32,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1964384073] [2021-11-20 05:51:32,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:51:32,897 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:51:32,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:51:32,897 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:51:32,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-11-20 05:51:32,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:51:32,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 05:51:32,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:51:33,424 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 05:51:33,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:51:33,578 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 05:51:33,578 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:51:33,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1964384073] [2021-11-20 05:51:33,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1964384073] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:51:33,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:51:33,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-11-20 05:51:33,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551346124] [2021-11-20 05:51:33,579 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:51:33,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 05:51:33,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:51:33,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 05:51:33,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:51:33,580 INFO L87 Difference]: Start difference. First operand 516 states and 680 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 05:51:33,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:51:33,771 INFO L93 Difference]: Finished difference Result 635 states and 754 transitions. [2021-11-20 05:51:33,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:51:33,771 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 05:51:33,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:51:33,774 INFO L225 Difference]: With dead ends: 635 [2021-11-20 05:51:33,774 INFO L226 Difference]: Without dead ends: 635 [2021-11-20 05:51:33,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:51:33,775 INFO L933 BasicCegarLoop]: 415 mSDtfsCounter, 299 mSDsluCounter, 1613 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 2028 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:51:33,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 2028 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 117 Invalid, 0 Unknown, 144 Unchecked, 0.2s Time] [2021-11-20 05:51:33,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-20 05:51:33,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 518. [2021-11-20 05:51:33,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 358 states have (on average 1.6927374301675977) internal successors, (606), 469 states have internal predecessors, (606), 32 states have call successors, (32), 22 states have call predecessors, (32), 27 states have return successors, (44), 32 states have call predecessors, (44), 32 states have call successors, (44) [2021-11-20 05:51:33,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 682 transitions. [2021-11-20 05:51:33,787 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 682 transitions. Word has length 42 [2021-11-20 05:51:33,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:51:33,787 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 682 transitions. [2021-11-20 05:51:33,787 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 05:51:33,787 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 682 transitions. [2021-11-20 05:51:33,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 05:51:33,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:51:33,788 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 05:51:33,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (49)] Ended with exit code 0 [2021-11-20 05:51:33,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:51:33,999 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 05:51:33,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:51:34,000 INFO L85 PathProgramCache]: Analyzing trace with hash 421849722, now seen corresponding path program 1 times [2021-11-20 05:51:34,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:51:34,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1490743433] [2021-11-20 05:51:34,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:51:34,000 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:51:34,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:51:34,001 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:51:34,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-11-20 05:51:34,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:51:34,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:51:34,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:51:34,192 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 05:51:34,219 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 05:51:34,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:51:34,304 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 05:51:34,304 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:51:34,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1490743433] [2021-11-20 05:51:34,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1490743433] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:51:34,305 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:51:34,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-20 05:51:34,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899784696] [2021-11-20 05:51:34,305 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:51:34,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:51:34,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:51:34,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:51:34,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:51:34,306 INFO L87 Difference]: Start difference. First operand 518 states and 682 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 05:51:34,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:51:34,854 INFO L93 Difference]: Finished difference Result 523 states and 688 transitions. [2021-11-20 05:51:34,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:51:34,855 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 05:51:34,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:51:34,857 INFO L225 Difference]: With dead ends: 523 [2021-11-20 05:51:34,857 INFO L226 Difference]: Without dead ends: 523 [2021-11-20 05:51:34,857 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 05:51:34,858 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 14 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:51:34,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 945 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 05:51:34,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-11-20 05:51:34,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 517. [2021-11-20 05:51:34,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 358 states have (on average 1.6899441340782122) internal successors, (605), 468 states have internal predecessors, (605), 32 states have call successors, (32), 22 states have call predecessors, (32), 27 states have return successors, (44), 32 states have call predecessors, (44), 32 states have call successors, (44) [2021-11-20 05:51:34,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 681 transitions. [2021-11-20 05:51:34,872 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 681 transitions. Word has length 42 [2021-11-20 05:51:34,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:51:34,876 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 681 transitions. [2021-11-20 05:51:34,877 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), 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 05:51:34,877 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 681 transitions. [2021-11-20 05:51:34,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 05:51:34,877 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:51:34,878 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, 1] [2021-11-20 05:51:34,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-11-20 05:51:35,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:51:35,090 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 05:51:35,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:51:35,090 INFO L85 PathProgramCache]: Analyzing trace with hash 421849723, now seen corresponding path program 1 times [2021-11-20 05:51:35,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:51:35,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1013619854] [2021-11-20 05:51:35,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:51:35,091 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:51:35,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:51:35,092 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:51:35,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-11-20 05:51:35,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:51:35,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 05:51:35,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:51:35,284 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 05:51:35,374 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 05:51:35,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:51:35,725 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 05:51:35,725 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:51:35,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1013619854] [2021-11-20 05:51:35,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1013619854] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:51:35,725 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:51:35,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-20 05:51:35,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017143684] [2021-11-20 05:51:35,725 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:51:35,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 05:51:35,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:51:35,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 05:51:35,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:51:35,726 INFO L87 Difference]: Start difference. First operand 517 states and 681 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 05:51:37,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:51:37,988 INFO L93 Difference]: Finished difference Result 580 states and 752 transitions. [2021-11-20 05:51:37,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:51:37,989 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 05:51:37,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:51:37,993 INFO L225 Difference]: With dead ends: 580 [2021-11-20 05:51:37,993 INFO L226 Difference]: Without dead ends: 580 [2021-11-20 05:51:37,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-20 05:51:37,994 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 57 mSDsluCounter, 1883 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 2235 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:51:37,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 2235 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-20 05:51:37,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-11-20 05:51:38,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 516. [2021-11-20 05:51:38,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 358 states have (on average 1.687150837988827) internal successors, (604), 467 states have internal predecessors, (604), 32 states have call successors, (32), 22 states have call predecessors, (32), 27 states have return successors, (44), 32 states have call predecessors, (44), 32 states have call successors, (44) [2021-11-20 05:51:38,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 680 transitions. [2021-11-20 05:51:38,006 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 680 transitions. Word has length 42 [2021-11-20 05:51:38,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:51:38,006 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 680 transitions. [2021-11-20 05:51:38,006 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 05:51:38,006 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 680 transitions. [2021-11-20 05:51:38,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 05:51:38,007 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:51:38,007 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 05:51:38,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2021-11-20 05:51:38,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:51:38,214 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 05:51:38,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:51:38,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1935452453, now seen corresponding path program 1 times [2021-11-20 05:51:38,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:51:38,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1471325865] [2021-11-20 05:51:38,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:51:38,215 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:51:38,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:51:38,216 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:51:38,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-11-20 05:51:38,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:51:38,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 05:51:38,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:51:38,347 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 05:51:38,413 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 05:51:38,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:51:38,548 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 05:51:38,549 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:51:38,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1471325865] [2021-11-20 05:51:38,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1471325865] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:51:38,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:51:38,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-20 05:51:38,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885859552] [2021-11-20 05:51:38,549 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:51:38,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:51:38,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:51:38,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:51:38,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:51:38,550 INFO L87 Difference]: Start difference. First operand 516 states and 680 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 05:51:39,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:51:39,833 INFO L93 Difference]: Finished difference Result 523 states and 688 transitions. [2021-11-20 05:51:39,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:51:39,834 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 05:51:39,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:51:39,837 INFO L225 Difference]: With dead ends: 523 [2021-11-20 05:51:39,837 INFO L226 Difference]: Without dead ends: 523 [2021-11-20 05:51:39,837 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 05:51:39,837 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 41 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1161 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:51:39,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 1161 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 598 Invalid, 0 Unknown, 120 Unchecked, 1.3s Time] [2021-11-20 05:51:39,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-11-20 05:51:39,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 519. [2021-11-20 05:51:39,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 361 states have (on average 1.6814404432132963) internal successors, (607), 470 states have internal predecessors, (607), 32 states have call successors, (32), 22 states have call predecessors, (32), 27 states have return successors, (44), 32 states have call predecessors, (44), 32 states have call successors, (44) [2021-11-20 05:51:39,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 683 transitions. [2021-11-20 05:51:39,869 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 683 transitions. Word has length 43 [2021-11-20 05:51:39,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:51:39,870 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 683 transitions. [2021-11-20 05:51:39,870 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 05:51:39,870 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 683 transitions. [2021-11-20 05:51:39,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 05:51:39,871 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:51:39,871 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 05:51:39,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2021-11-20 05:51:40,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:51:40,083 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 05:51:40,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:51:40,083 INFO L85 PathProgramCache]: Analyzing trace with hash 192642118, now seen corresponding path program 1 times [2021-11-20 05:51:40,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:51:40,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [523831046] [2021-11-20 05:51:40,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:51:40,084 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:51:40,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:51:40,085 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:51:40,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-11-20 05:51:40,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:51:40,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:51:40,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:51:40,248 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 05:51:40,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:51:40,325 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 05:51:40,326 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:51:40,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [523831046] [2021-11-20 05:51:40,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [523831046] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:51:40,326 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:51:40,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-20 05:51:40,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507592021] [2021-11-20 05:51:40,327 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:51:40,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:51:40,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:51:40,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:51:40,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:51:40,328 INFO L87 Difference]: Start difference. First operand 519 states and 683 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 05:51:40,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:51:40,368 INFO L93 Difference]: Finished difference Result 569 states and 736 transitions. [2021-11-20 05:51:40,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:51:40,369 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 05:51:40,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:51:40,372 INFO L225 Difference]: With dead ends: 569 [2021-11-20 05:51:40,372 INFO L226 Difference]: Without dead ends: 569 [2021-11-20 05:51:40,373 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 05:51:40,373 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 05:51:40,374 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 05:51:40,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-11-20 05:51:40,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 517. [2021-11-20 05:51:40,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 359 states have (on average 1.682451253481894) internal successors, (604), 468 states have internal predecessors, (604), 32 states have call successors, (32), 22 states have call predecessors, (32), 27 states have return successors, (44), 32 states have call predecessors, (44), 32 states have call successors, (44) [2021-11-20 05:51:40,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 680 transitions. [2021-11-20 05:51:40,385 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 680 transitions. Word has length 43 [2021-11-20 05:51:40,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:51:40,385 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 680 transitions. [2021-11-20 05:51:40,386 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 05:51:40,386 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 680 transitions. [2021-11-20 05:51:40,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 05:51:40,386 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:51:40,387 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 05:51:40,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2021-11-20 05:51:40,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:51:40,598 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 05:51:40,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:51:40,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1150380693, now seen corresponding path program 1 times [2021-11-20 05:51:40,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:51:40,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1032146343] [2021-11-20 05:51:40,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:51:40,599 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:51:40,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:51:40,599 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:51:40,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-11-20 05:51:40,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:51:40,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-20 05:51:40,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:51:40,796 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 05:51:40,797 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 05:51:40,989 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-11-20 05:51:40,990 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 05:51:41,362 INFO L354 Elim1Store]: treesize reduction 45, result has 45.1 percent of original size [2021-11-20 05:51:41,362 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 05:51:42,319 INFO L354 Elim1Store]: treesize reduction 57, result has 30.5 percent of original size [2021-11-20 05:51:42,319 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 05:51:42,731 INFO L354 Elim1Store]: treesize reduction 73, result has 25.5 percent of original size [2021-11-20 05:51:42,731 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 05:51:43,192 INFO L354 Elim1Store]: treesize reduction 73, result has 31.1 percent of original size [2021-11-20 05:51:43,192 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 05:51:43,679 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 05:51:43,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:54:36,146 WARN L860 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_entry_point_#t~ret66#1.base_141| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_#t~ret67#1.base_109| (_ BitVec 32))) (let ((.cse0 (store |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret66#1.base_141| (_ bv1 1)))) (or (not (= (_ bv0 1) (select .cse0 |v_ULTIMATE.start_entry_point_#t~ret67#1.base_109|))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store (store (store .cse0 |v_ULTIMATE.start_entry_point_#t~ret67#1.base_109| (_ bv0 1)) |v_ULTIMATE.start_entry_point_#t~ret66#1.base_141| (_ bv0 1)) |c_ldv_malloc_#res.base| (_ bv0 1)) |c_~#ldv_global_msg_list~0.base|)))))))))))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret66#1.base_141|)))))))) (exists ((|v_ULTIMATE.start_entry_point_#t~ret66#1.base_141| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_#t~ret67#1.base_109| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_#t~ret65#1.base_148| (_ BitVec 32))) (let ((.cse1 (store |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret65#1.base_148| (_ bv1 1)))) (let ((.cse2 (store .cse1 |v_ULTIMATE.start_entry_point_#t~ret66#1.base_141| (_ bv1 1)))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_entry_point_#t~ret66#1.base_141|)))))) (= (_ bv0 1) (bvneg (select .cse2 |v_ULTIMATE.start_entry_point_#t~ret67#1.base_109|))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store (store (store .cse2 |v_ULTIMATE.start_entry_point_#t~ret67#1.base_109| (_ bv0 1)) |v_ULTIMATE.start_entry_point_#t~ret66#1.base_141| (_ bv0 1)) |v_ULTIMATE.start_entry_point_#t~ret65#1.base_148| (_ bv0 1)) |c_~#ldv_global_msg_list~0.base|))))))))))) (_ bv1 1)))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret65#1.base_148|)))))))) is different from true [2021-11-20 05:54:54,752 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 05:54:54,753 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:54:54,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1032146343] [2021-11-20 05:54:54,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1032146343] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:54:54,753 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:54:54,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 29 [2021-11-20 05:54:54,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233713763] [2021-11-20 05:54:54,753 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:54:54,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-20 05:54:54,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:54:54,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-20 05:54:54,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=588, Unknown=85, NotChecked=56, Total=930 [2021-11-20 05:54:54,754 INFO L87 Difference]: Start difference. First operand 517 states and 680 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 05:54:58,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:54:58,208 INFO L93 Difference]: Finished difference Result 519 states and 683 transitions. [2021-11-20 05:54:58,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 05:54:58,209 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 05:54:58,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:54:58,212 INFO L225 Difference]: With dead ends: 519 [2021-11-20 05:54:58,212 INFO L226 Difference]: Without dead ends: 519 [2021-11-20 05:54:58,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 193.4s TimeCoverageRelationStatistics Valid=223, Invalid=687, Unknown=86, NotChecked=60, Total=1056 [2021-11-20 05:54:58,213 INFO L933 BasicCegarLoop]: 304 mSDtfsCounter, 39 mSDsluCounter, 1792 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 2096 SdHoareTripleChecker+Invalid, 1347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1116 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:54:58,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 2096 Invalid, 1347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 228 Invalid, 0 Unknown, 1116 Unchecked, 0.5s Time] [2021-11-20 05:54:58,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-11-20 05:54:58,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 519. [2021-11-20 05:54:58,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 361 states have (on average 1.6814404432132963) internal successors, (607), 470 states have internal predecessors, (607), 32 states have call successors, (32), 22 states have call predecessors, (32), 27 states have return successors, (44), 32 states have call predecessors, (44), 32 states have call successors, (44) [2021-11-20 05:54:58,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 683 transitions. [2021-11-20 05:54:58,224 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 683 transitions. Word has length 43 [2021-11-20 05:54:58,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:54:58,225 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 683 transitions. [2021-11-20 05:54:58,225 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 05:54:58,225 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 683 transitions. [2021-11-20 05:54:58,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 05:54:58,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:54:58,226 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 05:54:58,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-11-20 05:54:58,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:54:58,437 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 05:54:58,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:54:58,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1150380694, now seen corresponding path program 1 times [2021-11-20 05:54:58,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:54:58,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2129902400] [2021-11-20 05:54:58,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:54:58,438 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:54:58,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:54:58,439 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:54:58,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-11-20 05:54:58,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:54:58,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-20 05:54:58,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:55:00,699 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 05:55:00,700 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 05:55:02,877 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 05:55:02,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 05:55:11,218 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 05:55:11,218 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 05:55:12,923 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 05:55:12,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:55:26,995 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 05:55:29,235 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 05:55:31,827 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 05:55:32,351 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 05:55:32,352 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:55:32,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2129902400] [2021-11-20 05:55:32,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2129902400] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:55:32,352 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:55:32,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 26 [2021-11-20 05:55:32,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622082092] [2021-11-20 05:55:32,352 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:55:32,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-20 05:55:32,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:55:32,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-20 05:55:32,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=472, Unknown=12, NotChecked=144, Total=756 [2021-11-20 05:55:32,353 INFO L87 Difference]: Start difference. First operand 519 states and 683 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) [2021-11-20 05:55:47,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:47,435 INFO L93 Difference]: Finished difference Result 519 states and 682 transitions. [2021-11-20 05:55:47,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 05:55:47,437 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 43 [2021-11-20 05:55:47,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:47,440 INFO L225 Difference]: With dead ends: 519 [2021-11-20 05:55:47,440 INFO L226 Difference]: Without dead ends: 519 [2021-11-20 05:55:47,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 41.0s TimeCoverageRelationStatistics Valid=247, Invalid=803, Unknown=18, NotChecked=192, Total=1260 [2021-11-20 05:55:47,441 INFO L933 BasicCegarLoop]: 316 mSDtfsCounter, 65 mSDsluCounter, 2531 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 2847 SdHoareTripleChecker+Invalid, 2684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2213 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:47,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 2847 Invalid, 2684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 463 Invalid, 0 Unknown, 2213 Unchecked, 1.5s Time] [2021-11-20 05:55:47,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-11-20 05:55:47,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 519. [2021-11-20 05:55:47,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 361 states have (on average 1.6786703601108033) internal successors, (606), 470 states have internal predecessors, (606), 32 states have call successors, (32), 22 states have call predecessors, (32), 27 states have return successors, (44), 32 states have call predecessors, (44), 32 states have call successors, (44) [2021-11-20 05:55:47,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 682 transitions. [2021-11-20 05:55:47,452 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 682 transitions. Word has length 43 [2021-11-20 05:55:47,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:47,452 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 682 transitions. [2021-11-20 05:55:47,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2021-11-20 05:55:47,453 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 682 transitions. [2021-11-20 05:55:47,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 05:55:47,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:47,453 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, 1] [2021-11-20 05:55:47,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2021-11-20 05:55:47,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:55:47,654 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr10REQUIRES_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 05:55:47,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:47,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1670659867, now seen corresponding path program 1 times [2021-11-20 05:55:47,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:55:47,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1058336481] [2021-11-20 05:55:47,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:47,655 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:55:47,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:55:47,655 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:55:47,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-11-20 05:55:47,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:47,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 05:55:47,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:55:47,835 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 05:55:47,907 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 05:55:47,907 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 05:55:47,948 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 05:55:47,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:55:50,081 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 05:55:50,082 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:55:50,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1058336481] [2021-11-20 05:55:50,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1058336481] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:55:50,082 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:55:50,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 3] imperfect sequences [] total 6 [2021-11-20 05:55:50,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387473544] [2021-11-20 05:55:50,082 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:55:50,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:55:50,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:55:50,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:55:50,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=24, Unknown=1, NotChecked=0, Total=42 [2021-11-20 05:55:50,083 INFO L87 Difference]: Start difference. First operand 519 states and 682 transitions. Second operand has 7 states, 6 states have (on average 5.0) internal successors, (30), 7 states have internal predecessors, (30), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 05:55:50,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:50,395 INFO L93 Difference]: Finished difference Result 520 states and 684 transitions. [2021-11-20 05:55:50,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:55:50,396 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), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 44 [2021-11-20 05:55:50,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:50,399 INFO L225 Difference]: With dead ends: 520 [2021-11-20 05:55:50,399 INFO L226 Difference]: Without dead ends: 520 [2021-11-20 05:55:50,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=24, Invalid=31, Unknown=1, NotChecked=0, Total=56 [2021-11-20 05:55:50,400 INFO L933 BasicCegarLoop]: 326 mSDtfsCounter, 1 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:50,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 746 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 114 Invalid, 0 Unknown, 123 Unchecked, 0.3s Time] [2021-11-20 05:55:50,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-11-20 05:55:50,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 518. [2021-11-20 05:55:50,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 361 states have (on average 1.6759002770083102) internal successors, (605), 469 states have internal predecessors, (605), 32 states have call successors, (32), 22 states have call predecessors, (32), 27 states have return successors, (44), 32 states have call predecessors, (44), 32 states have call successors, (44) [2021-11-20 05:55:50,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 681 transitions. [2021-11-20 05:55:50,411 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 681 transitions. Word has length 44 [2021-11-20 05:55:50,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:50,412 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 681 transitions. [2021-11-20 05:55:50,412 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), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-20 05:55:50,412 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 681 transitions. [2021-11-20 05:55:50,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 05:55:50,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:50,413 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, 1] [2021-11-20 05:55:50,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (56)] Ended with exit code 0 [2021-11-20 05:55:50,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:55:50,625 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr11REQUIRES_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 05:55:50,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:50,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1670659868, now seen corresponding path program 1 times [2021-11-20 05:55:50,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:55:50,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1804146594] [2021-11-20 05:55:50,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:50,627 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:55:50,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:55:50,629 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:55:50,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-11-20 05:55:50,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:50,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 05:55:50,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:55:50,940 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 05:55:51,046 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 05:55:51,046 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 05:55:51,054 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 05:55:51,054 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 26 [2021-11-20 05:55:51,113 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 05:55:51,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:55:51,490 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 05:55:51,491 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 40 treesize of output 39 [2021-11-20 05:55:54,085 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 86 treesize of output 82 [2021-11-20 05:55:55,056 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 05:55:55,056 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:55:55,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1804146594] [2021-11-20 05:55:55,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1804146594] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:55:55,056 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:55:55,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-11-20 05:55:55,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652262950] [2021-11-20 05:55:55,057 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:55:55,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 05:55:55,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:55:55,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 05:55:55,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=122, Unknown=1, NotChecked=0, Total=156 [2021-11-20 05:55:55,058 INFO L87 Difference]: Start difference. First operand 518 states and 681 transitions. Second operand has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-20 05:55:56,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:56,328 INFO L93 Difference]: Finished difference Result 545 states and 707 transitions. [2021-11-20 05:55:56,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 05:55:56,329 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 44 [2021-11-20 05:55:56,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:56,331 INFO L225 Difference]: With dead ends: 545 [2021-11-20 05:55:56,331 INFO L226 Difference]: Without dead ends: 545 [2021-11-20 05:55:56,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=42, Invalid=139, Unknown=1, NotChecked=0, Total=182 [2021-11-20 05:55:56,332 INFO L933 BasicCegarLoop]: 316 mSDtfsCounter, 155 mSDsluCounter, 1393 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 1709 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 248 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:56,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 1709 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 277 Invalid, 0 Unknown, 248 Unchecked, 1.2s Time] [2021-11-20 05:55:56,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-11-20 05:55:56,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 517. [2021-11-20 05:55:56,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 361 states have (on average 1.6731301939058172) internal successors, (604), 468 states have internal predecessors, (604), 32 states have call successors, (32), 22 states have call predecessors, (32), 27 states have return successors, (44), 32 states have call predecessors, (44), 32 states have call successors, (44) [2021-11-20 05:55:56,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 680 transitions. [2021-11-20 05:55:56,346 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 680 transitions. Word has length 44 [2021-11-20 05:55:56,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:56,347 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 680 transitions. [2021-11-20 05:55:56,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-20 05:55:56,347 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 680 transitions. [2021-11-20 05:55:56,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 05:55:56,348 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:56,348 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, 1, 1] [2021-11-20 05:55:56,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2021-11-20 05:55:56,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:55:56,560 INFO L402 AbstractCegarLoop]: === Iteration 57 === 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 05:55:56,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:56,560 INFO L85 PathProgramCache]: Analyzing trace with hash 248981415, now seen corresponding path program 1 times [2021-11-20 05:55:56,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:55:56,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [431102753] [2021-11-20 05:55:56,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:56,561 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:55:56,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:55:56,561 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:55:56,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-11-20 05:55:56,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:56,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 05:55:56,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:55:57,293 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 05:55:57,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:55:57,516 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 05:55:57,516 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:55:57,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [431102753] [2021-11-20 05:55:57,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [431102753] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:55:57,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:55:57,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2021-11-20 05:55:57,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940638570] [2021-11-20 05:55:57,517 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:55:57,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 05:55:57,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:55:57,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 05:55:57,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:55:57,518 INFO L87 Difference]: Start difference. First operand 517 states and 680 transitions. Second operand has 10 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 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 05:55:57,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:57,666 INFO L93 Difference]: Finished difference Result 636 states and 754 transitions. [2021-11-20 05:55:57,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:55:57,667 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 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 45 [2021-11-20 05:55:57,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:57,670 INFO L225 Difference]: With dead ends: 636 [2021-11-20 05:55:57,670 INFO L226 Difference]: Without dead ends: 636 [2021-11-20 05:55:57,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 79 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 05:55:57,670 INFO L933 BasicCegarLoop]: 408 mSDtfsCounter, 311 mSDsluCounter, 1757 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 2165 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:57,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 2165 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 45 Invalid, 0 Unknown, 119 Unchecked, 0.1s Time] [2021-11-20 05:55:57,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-11-20 05:55:57,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 519. [2021-11-20 05:55:57,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 363 states have (on average 1.6694214876033058) internal successors, (606), 470 states have internal predecessors, (606), 32 states have call successors, (32), 22 states have call predecessors, (32), 27 states have return successors, (44), 32 states have call predecessors, (44), 32 states have call successors, (44) [2021-11-20 05:55:57,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 682 transitions. [2021-11-20 05:55:57,682 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 682 transitions. Word has length 45 [2021-11-20 05:55:57,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:57,683 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 682 transitions. [2021-11-20 05:55:57,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 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 05:55:57,683 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 682 transitions. [2021-11-20 05:55:57,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-20 05:55:57,683 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:57,684 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, 1, 1] [2021-11-20 05:55:57,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2021-11-20 05:55:57,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:55:57,895 INFO L402 AbstractCegarLoop]: === Iteration 58 === 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 05:55:57,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:57,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1709262998, now seen corresponding path program 1 times [2021-11-20 05:55:57,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:55:57,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [619565711] [2021-11-20 05:55:57,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:57,896 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:55:57,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:55:57,896 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:55:57,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e61959-5a56-4302-b63a-541ea1b4de73/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2021-11-20 05:55:58,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:58,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 05:55:58,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:55:58,187 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-20 05:55:58,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2021-11-20 05:55:58,444 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-20 05:55:58,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-20 05:55:58,629 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-20 05:55:58,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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